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Journal articles on the topic 'Hand comfort'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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1

Lee, Songil, Donghee Choi, Hyeeun Choi, Kitae Hwang, Seonghyeok Park, Minjoong Kim, Jihhyeon Yi, Si Jung Kim, and Gyouhyung Kyung*. "Determining ergonomic forms for rollable display devices." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 62, no. 1 (September 2018): 1017. http://dx.doi.org/10.1177/1541931218621234.

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Following commercialization of curved displays, foldable and rollable displays are under development. The rollable display should be unrolled first using a pulling motion to access the screen. The corresponding pulling force acting on the lateral grip (bezel) areas of the device should be higher than the spring force typically used for retracting the screen. The objective of the current study was to examine the effects of hand length and device thickness on the required lateral grip area sizes of the rollable display device and the grip comfort for the screen unrolling motion, and to ultimately determine the ergonomic bezel width and device thickness associated with high grip comfort. Thirty young individuals with the mean (SD) age of 22.1 (2.2) years participated in this study. All participants were recruited from a university population, right-handed, and healthy without any musculoskeletal diseases on their upper limbs. This study was a 3 (Hand length) × 3 (Device thickness) mixed factorial design. Hand length (HandS/M/L; between-subjects factor) consisted of HandS (short hand length; ≤162.5 mm, 10th percentile), HandM (medium hand length; 174.6–177.3 mm, 45th–55th percentile), and HandL (large hand length; ≥189.4 mm, 90th percentile). Device thickness (DeviceThin/Medium/Thick; within-subjects factor) consisted of DeviceThin (2 mm thick), DeviceMedium (6 mm thick), and DeviceThick (10 mm thick). Each of three rollable display device prototypes was comprised of Acrylonitrile Butadiene Styrene plastic panels, a roll of paper screen (to show a default screen), a roller, and a spring (to roll the screen). The thickness of the right side of the device was manipulated, whereas that of the left side was fixed at 10 mm to house the three parts described above (a rollable screen, a roller, and a spring). When fully unrolled, the sizes of each prototype and the screen were 140H × 300W × 2.5R (mm) and 130H × 260W (mm), respectively. The prototype was equally split into two sides, with each grip part (bezel) 20 mm wide. A 1 mm-interval grid image (130H × 20W (mm)) was attached to each bezel to measure the bezel area involved in gripping. The initial pulling force for unrolling the screen was 2.5N. A desk (150 × 60 × 73 cm) and a height-adjustable chair were used. First, participants unrolled and rolled the prototypes freely for five min to familiarize themselves with how to use the prototypes. A randomly assigned prototype was evaluated three times as follows. Each seated participant repeated unrolling and rolling motions with the assigned prototype until they found the most comfortable grip. While the screen was fully unrolled using the most comfortable grip, each grip area was photographed from four different directions. Then, each individual rated the grip comfort of each hand on a 100mm Visual Analogue Scale (0: Very uncomfortable, 100: Very comfortable). A paper-and-pencil method was used for comfort ratings. The entire procedure to evaluate the three prototypes required about 30 min per participant. Regardless of hand length, the width of the grip area from the device side edge was up to 20 mm. The mean (SD) height of the grip areas for HandS/M/L was 108.8 (3.1), 116.8 (2.5), 124.2 (2.3), respectively. Regardless of hand length, the lower end of the grip area reached the bottom of the device, while the upper end moved more upward with hand lengths. The thinner the device was, the smaller the difference in the grip areas was across the three hand-length groups. In addition, grip comfort increased with device thickness. When gripping a thinner object, the grip posture becomes more deviated from a relaxed hand posture to make more flexions of the thumb and fingers. The simple linear regression model for the left-hand grip comfort on the right-hand grip comfort was constructed (R2 = 0.68 and p-values <0.001): Y(left-hand grip comfort)=23.1+0.74×X(right-hand grip comfort) This regression model indicates that the two grip comfort ratings were positively correlated. In addition, the right-hand grip comfort ratings were lower than the left-hand grip comfort ratings. The mean (SD) comfort ratings for the left and right hands were 75.1 (19.2) and 78.6 (17.3), respectively, with p-value for a paired t-test < 0.001. Thus, device thickness appears to be an important design dimension that influences the grip comfort associated with screen unrolling. There are some limitations in the current study. First, the initial pulling force required for screen unrolling was fixed at 2.5N. The screen unrolling motion involves external rotation of the shoulders. To the authors’ knowledge, no study has investigated an ergonomic force range for this motion. Second, some measurement errors may have been involved in manually identifying the grip area based on the photographs. Using touch sensors would provide more accurate and faster measurements. Finally, it is necessary to analyze the grip areas more in detail. The current study investigated the effects of hand length and device thickness on the grip area and the grip comfort of each hand for rollable display devices. The findings suggested that regardless of hand length, the side bezel of a rollable display device should be at least 20 mm wide and the device should be sufficiently thick (preferably 10 mm thick) to ensure high grip comfort. These findings will be useful when designing ergonomic rollable display devices with high grip comfort.
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2

Kuijt-Evers, L. F. M., L. Groenesteijn, M. P. de Looze, and P. Vink. "Identifying factors of comfort in using hand tools." Applied Ergonomics 35, no. 5 (September 2004): 453–58. http://dx.doi.org/10.1016/j.apergo.2004.04.001.

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3

Geng, Shi Bin, Yong Li, Xu Han, and Yong Hua Liu. "Thermal Comfort Model for Underground Engineering of China." Advanced Materials Research 516-517 (May 2012): 1214–18. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1214.

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Chinese territory is vast, on one hand, the underground engineering distributes extensively, the weather condition is quite different from different regions; on the other hand, the various factors impacting the thermal parameters are different from surface engineering. The way of traditional design temperature was very limited, it was very necessity to explored the rational thermal comfort model. The theory related to thermal comfort was studied, especially focusing on adaptive thermal comfort model. Based on the analysis of factors influencing thermal comfort and research of some engineering, the thermal comfort model for the protective engineering was proposed and its rationality and energy saving effect were explored.
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4

Yi, Jihhyeon, Sungryul Park, Juah Im, Seonyeong Jeon, and Gyouhyung Kyung. "Effects of display curvature and hand length on smartphone usability." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 61, no. 1 (September 2017): 1054–57. http://dx.doi.org/10.1177/1541931213601868.

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The purpose of this study was to examine the effects of display curvature and hand length on smartphone usability, which was assessed in terms of grip comfort, immersive feeling, typing performance, and overall satisfaction. A total of 20 younger individuals with the mean (SD) age of 20.8 (2.4) yrs were divided into three hand-size groups (small: 8, medium: 6, large: 6). Two smartphones of the same size were used – one with a flat display and the other with a side-edge curved display. Three tasks (watching video, calling, and texting) were used to evaluate smartphone usability. The smartphones were used in a landscape mode for the first task, and in a portrait mode for the other two. The flat display smartphone provided higher grip comfort during calling (p = 0.008) and texting (p = 0.006) and higher overall satisfaction (p = 0.0002) than the curved display smartphone. The principal component regression (adjusted R2 = 0.49) of overall satisfaction on three principal components comprised of the remaining measures showed that the first principal component on grip comfort was more important than the other two on watching experience and texting performance. It is thus necessary to carefully consider the effect of display curvature on grip comfort when applying curved displays to hand-held devices such as smartphones.
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5

Lee, Songil, Gyouhyung Kyung, Minjoong Kim, Donghee Choi, Hyeeun Choi, Kitae Hwang, Seonghyeok Park, Su Young Kim, and Seungbae Lee. "Shaping Rollable Display Devices: Effects of Gripping Condition, Device Thickness, and Hand Length on Bimanual Perceived Grip Comfort." Human Factors: The Journal of the Human Factors and Ergonomics Society 62, no. 5 (July 2, 2019): 770–86. http://dx.doi.org/10.1177/0018720819855225.

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Objective To examine the effects of the gripping condition, device thickness, and hand length on bimanual perceived grip comfort associated with unrolling hand-held rollable screens. Background Rollable displays can be rolled and unrolled to change screen size. Although diverse rollable display device concepts have been suggested, little is known regarding ergonomic forms for comfortable screen unrolling. Method Thirty young individuals (10 in each hand-length group) evaluated three rollable display device prototypes in three gripping conditions (no restriction on using side bezels, minimal use of side bezels, and restriction on the gripping type). Prototypes differed in their right-side thickness (2, 6, and 10 mm). Side bezel regions grasped during screen unrolling and corresponding bimanual grip comfort ratings were obtained. Results To improve perceived grip comfort and accommodate user-preferred gripping methods, rollable display devices should be 6 mm (preferably 10 mm) thick (vs. 2 mm) and have at least 20-mm-wide side bezels. Relative to device thickness, gripping conditions were more influential on grip comfort ratings. The “no restriction” condition improved grip comfort ratings and strengthened bimanual coupling in terms of grip comfort ratings. Conclusion Contrary to current smartphone trends toward thinner and bezel-less designs, hand-held rollable display devices should be sufficiently thick and have sufficiently wide side bezels for screen unrolling. Application Hand-held rollable display devices should be 6- or preferably 10-mm thick (vs. 2 mm) and have at least 20-mm-wide side bezels to ensure higher perceived grip comfort during bilateral screen unrolling.
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6

Bell, Michael Sg, and Bert J. Reitsma. "Solo Hand Surgery." Canadian Journal of Plastic Surgery 13, no. 3 (August 2005): 145–47. http://dx.doi.org/10.1177/229255030501300306.

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Unassisted hand surgery is being undertaken by necessity for both elective and emergency cases, due to hospital resource restrictions. The authors outline the principles of local anesthesia, surgeon-controlled tourniquet techniques, and a number of new instruments which allow a surgeon to work in comfort and safety, unassisted. The traditional surgical instruments designed for the days when trained surgical assistants were available to hold them are no longer suitable. We are entering a new era of surgical design with safer instruments that can complement our skills rather than challenge them. There are significant cost savings and efficiency when hand procedures are undertaken in the emergency and outpatient clinic settings.
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7

Brajkovic, Dragan, Michel B. Ducharme, and John Frim. "Influence of localized auxiliary heating on hand comfort during cold exposure." Journal of Applied Physiology 85, no. 6 (December 1, 1998): 2054–65. http://dx.doi.org/10.1152/jappl.1998.85.6.2054.

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There is a need for a hand-heating system that will keep the hands warm during cold exposure without hampering finger dexterity. The purpose of this study was to examine the effects of torso heating on the vasodilative responses and comfort levels of cooled extremities during a 3-h exposure to −15°C air. Subjects were insulated, but their upper extremities were left exposed to the cold ambient air. The effect of heating the torso [torso-heating test (THT)] on hand comfort was compared with a control condition in which no torso heating was applied, but Arctic mitts were worn [control test (CT)]. The results indicate that mean finger temperature, mean finger blood flow, mean toe temperature, mean body skin temperature, body thermal comfort, mean finger thermal comfort, and rate of body heat storage were all significantly ( P< 0.05) higher on average ( n = 6) during THT. Mean body heat flow was significantly ( P < 0.05) lower during THT. There were no significant differences ( P ≥ 0.05) in rectal temperature between CT and THT. Mean unheated body skin temperature and mean unheated body heat flow (both of which did not include the torso area in the calculation of mean body skin temperature and mean body heat flow) were also calculated. There were no significant differences ( P ≥ 0.05) in mean unheated body skin temperature and mean unheated body heat flow between CT and THT. It is concluded that the application of heat to the torso can maintain finger and toe comfort for an extended period of time during cold exposure.
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8

ARIMOTO, Ryosuke, Masato ITO, Kazuki HOKARI, Jonas A. PRAMUDITA, Satoshi NODA, and Yuji TANABE. "Development of Hand Finite Element Model for Gripping Comfort Evaluation." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2018.30 (2018): 1E07. http://dx.doi.org/10.1299/jsmebio.2018.30.1e07.

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Kuijt-Evers, LFM, J. Twisk, L. Groenesteijn, MP de Looze, and P. Vink. "Identifying predictors of comfort and discomfort in using hand tools." Ergonomics 48, no. 6 (May 15, 2005): 692–702. http://dx.doi.org/10.1080/00140130500070814.

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Kolcaba, Katharine, Victoria Schirm, and Richard Steiner. "Effects of Hand Massage on Comfort of Nursing Home Residents." Geriatric Nursing 27, no. 2 (March 2006): 85–91. http://dx.doi.org/10.1016/j.gerinurse.2006.02.006.

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11

Lahlou, Anas, Florence Ossart, Emmanuel Boudard, Francis Roy, and Mohamed Bakhouya. "Optimal Management of Thermal Comfort and Driving Range in Electric Vehicles." Energies 13, no. 17 (August 31, 2020): 4471. http://dx.doi.org/10.3390/en13174471.

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The HVAC system represents the main auxiliary load in battery-powered electric vehicles (BEVs) and requires efficient control approaches that balance energy saving and thermal comfort. On the one hand, passengers always demand more comfort, but on the other hand the HVAC system consumption strongly impacts the vehicle’s driving range, which constitutes a major concern in BEVs. In this paper, a thermal comfort management approach that optimizes the thermal comfort while preserving the driving range during a trip is proposed. The electric vehicle is first modeled together with the HVAC and the passengers’ thermo-physiological behavior. Then, the thermal comfort management issue is formulated as an optimization problem solved by dynamic programing. Two representative test-cases of hot climates and traffic situations are simulated. In the first one, the energetic cost and ratio of improved comfort is quantified for different meteorological and traffic conditions. The second one highlights the traffic situation in which a trade-off between the driving speed and thermal comfort is important. A large number of weather and traffic situations are simulated and results show the efficiency of the proposed approach in minimizing energy consumption while maintaining a good comfort.
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Branson, Donna H., Lynda Abusamra, Carolyn Hoener, and Sandra Rice. "Effect of Glove Liners on Sweat Rate, Comfort, and Psychomotor Task Performance." Textile Research Journal 58, no. 3 (March 1988): 166–73. http://dx.doi.org/10.1177/004051758805800307.

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Military subjects participated in a study to evaluate four glove liners worn beneath chemical protective gloves, with regard to sweating of the hands, manual dexterity performance, and perceived comfort in a moderate thermal environment. Although there was a trend for subjects wearing the standard Army liner to experience the lowest sweat rate, the liner effect was not significant due to individual variation. No liner differences were found for manual dexterity performance, hand skin temperature, perceived temperature, and thermal comfort. Differences by liner were found for tactile descriptors used to assess liner comfort. Skin temperature, perceived temperature, and perceived thermal discomfort increased over the duration of the two-hour test, regardless of the liner worn.
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Kolcaba, Katharine, Therese Dowd, Richard Steiner, and Annette Mitzel. "Efficacy of Hand Massage for Enhancing the Comfort of Hospice Patients." Journal of Hospice & Palliative Nursing 6, no. 2 (April 2004): 91–102. http://dx.doi.org/10.1097/00129191-200404000-00012.

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Kuijt-Evers, L. F. M., P. Vink, and M. P. de Looze. "Comfort predictors for different kinds of hand tools: Differences and similarities." International Journal of Industrial Ergonomics 37, no. 1 (January 2007): 73–84. http://dx.doi.org/10.1016/j.ergon.2006.09.019.

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Sopiatun, Siti, Heda Melinda N Natapawira, and Meita Dhamayanti. "PERBANDINGAN TEKNIK PEMERAHAN ASI TANGAN DENGAN MANUAL BREAST PUMP TERHADAP KENYAMANAN IBU DAN KUALITAS ASI." JOMIS (Journal of Midwifery Science) 4, no. 2 (July 28, 2020): 18–27. http://dx.doi.org/10.36341/jomis.v4i2.1322.

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The scope of exclusive breastfeeding is low caused by many factors, one of which is a working mother. The government supports the program of exclusive breastfeeding for mothers by promoting breastfeeding by expressed breast milk. Expressed breast milk can be done by hand and manual tools such as pump. Expressed breast milk can be influenced by mother’s experience and the pain at the time of expressing breast milk, this can lead to a sense of comfort. The differences in expressing techniques might lead to contamination of different bacteria and fungi. the purpose of this research is to analyze the differences in hand milking techniques and manual breast pump on the comfort of the mother and the quality of breast milk This was an observational study with cross sectional approach and conductive in Taman Sari district, Bandung. The samples were 35 mothers who fulfilled the inclusion and exclusion criteria. Mann Whitney, Wilcoxon and McNemar were used in examining mothers’ comfort and breast milk quality. The result of of comfort score showed 65.6 in hand expressed and 59.5 has in manual breast pump. There were several significant differences in expressing techniques to mothers’comfort (p = 0.046). Hand expressing were contaminated by yeast (60%), total mesophilic bacteria (20%), and enterobacter (17.1%). Manual breast pump was contaminated by yeast (80%), total mesophilic bacteria (8.6%), and enterobacter (20%). Breast milk quality in hand expressed was better than the manual breast pump (p = 0.032). It was concluded that hand expressed more comfortable and had better quality breast milk than manual breast pump techniques.
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Ene, Alexandra, Tiberiu Catalina, and Andreea Vartires. "Determination of thermal and acoustic comfort inside a vehicle’s cabin." E3S Web of Conferences 32 (2018): 01002. http://dx.doi.org/10.1051/e3sconf/20183201002.

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Thermal and acoustic comfort, inside a vehicle’s cabin, are highly interconnected and can greatly influence the health of the passengers. On one hand, the H.V.A.C. system brings the interior air parameters to a comfortable value while on the other hand, it is the main source of noise. It is an intriguing task to find a balance between the two. In this paper, several types of air diffusers were used in order to optimize the ratio between thermal and acoustic interior comfort. Using complex measurements of noise and thermal comfort parameters we have determined for each type of air diffuser the sound pressure level and its impact on air temperature and air velocity.
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Li, Guangchuan, David Rempel, Yue Liu, Weitao Song, and Carisa Harris Adamson. "Design of 3D Microgestures for Commands in Virtual Reality or Augmented Reality." Applied Sciences 11, no. 14 (July 9, 2021): 6375. http://dx.doi.org/10.3390/app11146375.

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Virtual and augmented reality (VR, AR) systems present 3D images that users can interact with using controllers or gestures. The design of the user input process is crucial and determines the interactive efficiency, comfort, and adoption. Gesture-based input provides a device-free interaction that may improve safety and creativity compared to using a hand controller while allowing the hands to perform other tasks. Microgestures with small finger and hand motions may have an advantage over the larger forearm and upper arm gestures by reducing distraction, reducing fatigue, and increasing privacy during the interaction. The design of microgestures should consider user experience, ergonomic principles, and interface design to optimize productivity and comfort while minimizing errors. Forty VR/AR or smart device users evaluated a set of 33 microgestures, designed by ergonomists, and linked them to 20 common AR/VR commands based on usability, comfort, and preference. Based primarily on preference, a set of microgestures linked to specific commands is proposed for VR or AR systems. The proposed microgesture set will likely minimize fatigue and optimize usability. Furthermore, the methodology presented for selecting microgestures and assigning them to commands can be applied to the design of other gesture sets.
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Flouris, A. D., S. S. Cheung, J. R. Fowles, L. D. Kruisselbrink, D. A. Westwood, A. E. Carrillo, and R. J. L. Murphy. "Influence of body heat content on hand function during prolonged cold exposures." Journal of Applied Physiology 101, no. 3 (September 2006): 802–8. http://dx.doi.org/10.1152/japplphysiol.00197.2006.

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We examined the influence of 1) prior increase [preheating (PHT)], 2) increase throughout [heating (HT)], and 3) no increase [control (Con)] of body heat content (Hb) on neuromuscular function and manual dexterity of the hands during a 130-min exposure to −20°C (coldEx). Ten volunteers randomly underwent three passive coldEx, incorporating a 10-min moderate-exercise period at the 65th min while wearing a liquid conditioning garment (LCG) and military arctic clothing. In PHT, 50°C water was circulated in the LCG before coldEx until core temperature was increased by 0.5°C. In HT, participants regulated the inlet LCG water temperature throughout coldEx to subjective comfort, while the LCG was not operating in Con. Thermal comfort, rectal temperature, mean skin temperature, mean finger temperature (T̄fing), change in Hb (ΔHb), rate of body heat storage, Purdue pegboard test, finger tapping, handgrip, maximum voluntary contraction, and evoked twitch force of the first dorsal interosseus muscle were recorded. Results demonstrated that, unlike in HT and PHT, thermal comfort, rectal temperature, mean skin temperature, twitch force, maximum voluntary contraction, and finger tapping declined significantly in Con. In contrast, T̄fing and Purdue pegboard test remained constant only in HT. Generalized estimating equations demonstrated that ΔHb and T̄fing were associated over time with hand function, whereas no significant association was detected for rate of body heat storage. It is concluded that increasing Hb not only throughout but also before a coldEx is effective in maintaining hand function. In addition, we found that the best indicator of hand function is ΔHb followed by T̄fing.
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Ng, Poh Kiat, Yue Hang Tan, Kian Siong Jee, Li Wah Thong, Jian Ai Yeow, and Chiew Yean Ng. "Ergonomic Knob Design Validation for Improved Musculoskeletal Comfort." Modern Applied Science 10, no. 1 (December 20, 2015): 76. http://dx.doi.org/10.5539/mas.v10n1p76.

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<p>Ergonomic control devices can minimise risks of hand-related injuries. The pinch force exerted on a control knob during operations can be minimised so that excessive physical stress and strain on the hands are reduced. This improves working performance. Studies indicate that milling machine control knobs are difficult to operate. Hence, this study aims to validate an ergonomic knob design against a milling machine knob design to determine the extent of musculoskeletal comfort improvement. An ergonomic knob is designed based on a knurled spherical knob with ergonomics features. A validation is performed by requesting 12 participants to turn the knobs in clockwise and counterclockwise directions. Pinch force data is recorded. Findings show that the ergonomic knob reduces more than 55 % of pinch force compared to the milling machine knob replica. This study is useful for machine designers in the development of safer and more ergonomic knobs for various equipment, apparatus and devices.</p>
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20

Barker, Roger L. "From fabric hand to thermal comfort: the evolving role of objective measurements in explaining human comfort response to textiles." International Journal of Clothing Science and Technology 14, no. 3/4 (June 2002): 181–200. http://dx.doi.org/10.1108/09556220210437158.

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Li, Jun Yuan, and Xian Feng Jiang. "Research on Comfort Evaluation Method of Tool Handles." Advanced Materials Research 97-101 (March 2010): 3479–83. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.3479.

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Based on requirements of evaluation on comfort level of hand-held tool handles, this essay put forward an evaluation method as well as analyzed and proved its principle, established a corresponding evaluation mode, deliberated index and computation module for comfort level of tool handles. The authored also developed a set of software to evaluate comfort level of tool handles. With this software, one can efficiently evaluate the comfort level of tool handles and an evaluation report will be made automatically, which can serve as a reliable basis for revising shapes of handles.
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G.TADESSE, MELKIE, EMIL-CONSTANTIN LOGHIN, VINCENT NIERSTRASZ, and MARIA-CARMEN LOGHIN. "Quality inspection and prediction of the comfort of fabrics finished with functional polymers." Industria Textila 71, no. 04 (August 31, 2020): 340–49. http://dx.doi.org/10.35530/it.071.04.1734.

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Textile’s primary hand (HV) and total hand values (THV) are very important parameters and are used to identify the quality of clothing comfort. This paper aims to predict the HV and THV of the fabrics finished with functional polymers by applying Kawabata’s translation equations. The mechanical properties were achieved using Kawabata’s fabric evaluation system (KES-F) and the inference/interpretation was drawn. Then, HV and THV predictions were performed by applying Kawabata’s translation equations of the KN-101 and KN-301 series. The KES-F result confirmed that it is possible to observe the operative finishing effect on the mechanical properties of fabrics. The prediction results show that the total quality comfort of the functional fabrics could able be estimated by the equation developed by Kawabata; the calculated errors (~0.66) were within the range of the standard deviations (~0.78) of the samples between the predicted and ranked THV. The experimental and the calculated primary hand values showed strong correlation coefficients up to ~0.98 which is significant at 0.001 confidence levels. As actual functional fabrics with various surface properties were provided to estimate their tactile comfort via the equations, the result verified that the equation is reliable for the tactile comfort evaluation and grading.
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Wang, Wenjie, Xiansheng Qin, Chen Zheng, Hongbo Wang, Jing Li, and Junlong Niu. "Mechanical Energy Expenditure-based Comfort Evaluation Model for Gesture Interaction." Computational Intelligence and Neuroscience 2018 (December 30, 2018): 1–11. http://dx.doi.org/10.1155/2018/9861697.

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As an advanced interaction mode, the gesture has been widely used for the human-computer interaction (HCI). The paper proposes a comfort evaluation model based on the mechanical energy expenditure (MEE) and the mechanical efficiency (ME) to predict the comfort of gestures. The proposed comfort evaluation model takes nineteen muscles and seven degrees of freedom into consideration based on the data of muscles and joints and is capable of simulating the MEE and the ME of both static and dynamic gestures. The comfort scores (CSs) can be therefore calculated by normalizing and assigning different decision weights to the MEE and the ME. Compared with the traditional comfort prediction methods based on measurement, on the one hand, the proposed comfort evaluation model makes it possible for providing a quantitative value for the comfort of gestures without using electromyography (EMG) or other measuring devices; on the other hand, from the ergonomic perspective, the results provide an intuitive indicator to predict which act has the higher risk of fatigue or injury for joints and muscles. Experiments are conducted to validate the effectiveness of the proposed model. According to the comparison result among the proposed comfort evaluation model, the model based on the range of motion (ROM) and the model based on the method for movement and gesture assessment (MMGA), a slight difference can be found due to the ignorance of dynamic gestures and the relative kinematic characteristics during the movements of dynamic gestures. Therefore, considering the feedback of perceived effects and gesture recognition rate in HCI, designers can achieve a better optimization for the gesture design by making use of the proposed comfort evaluation model.
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Morse, Janice M. "Konseptualisering van 'n gemaksteorie." Health SA Gesondheid 4, no. 4 (December 1, 1999): 3–10. http://dx.doi.org/10.4102/hsag.v4i4.299.

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The centrality of comfort in nursing is discussed in this article and the role of the nurse in terms of comfort is described at the hand of examples of patients who are very upset in the trauma unit. OpsommingDie sentraliteit van gemak in verpleging word in hierdie artikel bespreek, en die rol van die verpleegkundige ten opsigte daarvan word beskryf aan die hand van voorbeelde van pasiente in die traumasaal wat uiters ontsteld is. *Please note: This is a reduced version of the abstract. Please refer to PDF for full text.
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Ellingson, Katherine, Philip M. Polgreen, Amy Schneider, Laura Shinkunas, Lauris C. Kaldjian, Donald Wright, Geb W. Thomas, et al. "Healthcare Personnel Perceptions of Hand Hygiene Monitoring Technology." Infection Control & Hospital Epidemiology 32, no. 11 (November 2011): 1091–96. http://dx.doi.org/10.1086/662179.

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Objective.To assess healthcare personnel (HCP) perceptions regarding implementation of sensor-based electronic systems for automated hand hygiene adherence monitoring.Design.Using a mixed-methods approach, structured focus groups were designed to elicit quantitative and qualitative responses on familiarity, comfort level, and perceived impact of sensor-based hand hygiene adherence monitoringSetting.A university hospital, a Veterans Affairs hospital, and a community hospital in the Midwest.Participants.Focus groups were homogenous by HCP type, with separate groups held for leadership, midlevel management, and frontline personnel at each hospital.Results.Overall, 89 HCP participated in 10 focus groups. Levels of familiarity and comfort with electronic oversight technology varied by HCP type; when compared with frontline HCP, those in leadership positions were significantly more familiar with (P<.01) and more comfortable with (P<.01) the technology. The most common concerns cited by participants across groups included lack of accuracy in the data produced, such as the inability of the technology to assess the situational context of hand hygiene opportunities, and the potential punitive use of data produced. Across groups, HCP had decreased tolerance for electronic collection of spatial-temporal data, describing such oversight as Big Brother.Conclusions.While substantial concerns were expressed by all types of HCP, participants' recommendations for effective implementation of electronic oversight technologies for hand hygiene monitoring included addressing accuracy issues before implementation and transparent communication with frontline HCP about the intended use of the data.
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Landeiro, Luciana Castro G., Rodrigo Dienstmann, Matheus Costa e Silva, Michele Gonçalves, Priscila Viana, Ana Paula dos Santos, Adriana de Castro, et al. "Randomized study of electric hand warmer (EHW) versus observation to avoid discomfort during scalp cooling for chemotherapy-induced alopecia (CIA) prevention." Journal of Clinical Oncology 39, no. 15_suppl (May 20, 2021): 12108. http://dx.doi.org/10.1200/jco.2021.39.15_suppl.12108.

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12108 Background: CIA has been reported as the most disturbing adverse event of cancer treatment by most women receiving chemotherapy. Many strategies have been tested to minimize CIA, among which scalp cooling has proven high effectiveness. However, discontinuation rates of this technology vary from 3% to 13%, mostly due to headache, cold sensation and pain. EHW could be used to mitigate these side effects, produce heat on demand and a warming sensation. The primary objective of this study is to evaluated the impact of EHW device on the general comfort of breast cancer patients while on scalp cooling during chemotherapy treatment. Methods: Patients were randomly assigned to EHW use or observation. Thermal, sensory and general comfort were measured with pragmatic questionnaires after each chemotherapy infusion: neutral or hot as favorable thermal responses; comfortable and very comfortable as favorable sensory responses; finally, favorable outcomes in both thermal and sensory comfort questionnaires defined a positive result on the general comfort. We evaluated the impact of age (≤ or > 50 years), alopecia (grade 0 or 1/2), chemotherapy regimen (with or without taxanes) and EHW use (yes or no) in the different comfort scales using Logistic Regression (LR) models. Results: Forty women with early or locally advanced breast cancer were assigned to EHW (n = 20) or observation (n = 20) during neo(adjuvant) chemotherapy. Median age was 53 years, 67.5% concluded university education, 52.5% had comorbidities. Most patients had stage II disease (55%), largely ER/PR+ HER2- disease (67.5%), followed by triple negative (22.5%), and HER2+ (10%). Most frequent regimen was ACdd-Tdd (42.5%). Thirty-one patients (77.5%) continued scalp cooling during entire chemotherapy regimen (alopecia < grade 3). A favorable thermal response was seen in 79% of EHW applications as compared to 50% in control arm (odds ratio [OR] 3.79, P <.001). Sensory comfort was satisfactory in 82% of EHW applications as compared to 74% with control (OR 1.62, P =.1). General comfort was favorable in 73% of EHW applications as compared to 44% in control arm (OR 3.4, P <.001). Age, alopecia grade and taxane use did not significantly impact on comfort measures. Conclusions: Our study suggests that an EHW has a consistent favorable impact on thermal and general comfort of breast cancer patients under scalp cooling technology to prevent CIA. This simple device can improve patient´s quality of life and eventually avoid scalp cooling discontinuation due to discomfort.
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Sukigara, Sachiko, Takako Fujimoto, and Masako Niwa. "Sensorial Comfort/Discomfort of Lingerie Based on Hand Assessment and Objective Evaluation." Sen'i Gakkaishi 49, no. 6 (1993): 294–305. http://dx.doi.org/10.2115/fiber.49.6_294.

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Clare, Camille A., Omara Afzal, Kenneth Knapp, and Deborah Viola. "Determining a Patient’s Comfort in Inquiring About Healthcare Providers’ Hand-Washing Behavior." Journal of Patient Safety 9, no. 2 (June 2013): 68–74. http://dx.doi.org/10.1097/pts.0b013e31827819d2.

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Castillejos, Pamela, and M. Susan Hallbeck. "Evaluation of a Hand-Held Neutron Detector for Usability, Design and Comfort." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 51, no. 17 (October 2007): 1001–5. http://dx.doi.org/10.1177/154193120705101701.

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Seven male first responders were surveyed about the usability, design, and comfort of a hand-held commercially available neutron detector. The primary goal of the questionnaire was to identify the positive and negative features, and evaluate what could be enhanced on new detectors. Some of the negative features found on the detector were that it was heavy, unbalanced, too big, and difficult to handle while wearing gloves. The first responders couldn't use the controls well while wearing gloves and the force required for the use of the controls is too hard. Using the recommendations given by the first responders, a future hand-held neutron detector will be designed and studies will be conducted after constructing several different physical prototypes.
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Moertl, Peter, Margit Hoefler, and Benjamin Ewerz. "Incorporating driver activity in holistic comfort models." Work 68, s1 (January 8, 2021): S119—S128. http://dx.doi.org/10.3233/wor-208011.

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BACKGROUND: We motivate and describe a holistic comfort model to account for the impact of driver and passenger activities on their comfort experiences in vehicles. The proposed model is an expansion of existing ones and postulates two dimensions of comfort that are linked with cognitive moderation processes toward holistic experience: physiological comfort combines multiple physiological experiences such as thermal, auditory, and postural comfort and is moderated via cognitive processes of focusing or masking. On the other hand, emotional comfort reflects the experience of activities and is moderated by cognitive appraisal processes. OBJECTIVE: Using this model, we derive three hypotheses that are examined. METHOD: In a driving simulator study, 32 participants assessed holistic and physiological comfort while driving under various conditions. RESULTS: The participant responses on various comfort questions loaded on two main principal components that closely resemble the distinction between holistic and physiological comfort. Also, the driving and non-driving activity types seemed to have a different impact on holistic versus physiological comfort as predicted by our model.
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MUSADDAQ, AZEEM, BOUGHATTAS AMAL, SIDDIQUE HAFIZ FAISAL, ANTONIN HAVELKA, and SAJID HUSSAIN. "Comfort properties of nano-filament polyester fabrics: sensory evaluation." Industria Textila 69, no. 01 (March 1, 2018): 3–10. http://dx.doi.org/10.35530/it.069.01.1440.

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In this article, an experimental work is presented to evaluate the sensorial properties of polyester fabric constructed by nano-filament yarn. For this purpose Nano Filament polyester fabric was fabricated and compared with the spun polyester/cotton (PC) and polyester/viscose (PV) blended fabric by using Kawabata evaluation system (KES-system) to assess the handle of the fabric based on mechanical characteristic. The results revealed that the fabric made from PC and PV blended fabric were stiffer than nano-filament polyester fabric. The higher hand value (THV) resulted in lower stiffness (Koshi), and higher smoothness (Numeri) and fullness (Fukurami).Hand values of PV blended fabric were close to nano-filament polyester fabric rather than PC fabric. The overall results of tensile, shearing, bending, compression and surface characteristics of nano-filament polyester fabric were found best as compared to PC and PV blended fabric.
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Dună, Ştefan, Ioan Silviu Doboşi, Dragoș Mihăilă, Daniel Teodorescu, and Laura Troi. "The notion of comfort, from word to concept." E3S Web of Conferences 111 (2019): 02071. http://dx.doi.org/10.1051/e3sconf/201911102071.

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The notion of comfort emerged from a background of constraints caused by environmental, social, psychological, technological etc. factors, as a human attitude and endeavor to diminish these constraints and then to improve other elements that could ensure a different quality standard of life. In the last two decades, one can perceive an intensification of the efforts put into revealing the factors, together with their limitations, which contribute to achieving the state of comfort in various types of buildings considered isolated or in relation to others, in a rural or urban setting, and putting them into a standardized format that is to be taken into account. The increasing debates between specialists on the one hand and between specialists and occupants/users/residents on the other hand regarding the addition of new factors or the preeminence of their importance generates the re-contextualization of the notion of “comfort”, whose elements are presented in this study. The last chapter proposes a different approach and understanding of the notion of comfort which can thus become a concept that finds its starting point in the way man is structured as a living being and takes
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Lapkovska, Eva, Inga Dabolina, and Liene Siliņa. "Method of Drape, Appearance and Comfort Measurements." Key Engineering Materials 800 (April 2019): 336–40. http://dx.doi.org/10.4028/www.scientific.net/kem.800.336.

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Depending on the type of garment to be designed, designers, developers, and retailers are aware of and put forward certain requirements for the implementation of an appropriate level of quality. But ultimately the consumer is the one who decides whether the product meets his individual requirements. There are many different standardized textile testing methods, as well as various subjective assessment methods for hand feel and wearing comfort occurs. The observations that the analysis of a product has to be complex has become increasingly widespread. The aim of the research is to formalize and practically use the conceptual method of drape, appearance and comfort measurements.
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Mikalauskaitė, Gerda, Virginija Daukantienė, and Giedrė Vadeikė. "Experimental Study of the Comfort Properties of Knitted Fabrics and their Joined Elements." Key Engineering Materials 800 (April 2019): 315–19. http://dx.doi.org/10.4028/www.scientific.net/kem.800.315.

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Assuring the comfort of the human body is one of the most important functions of sportswear and leisure wear. Knitted fabrics should have high air permeability for easily transmit of the perspiration from the skin to the atmosphere as well as to feature with good hand thus making the wearer to feel comfortable. In this research, both hand and air permeability of eight commercially available polyester knitted fabrics and their adhesive bonds were investigated. There was shown that textile structure and adhesive bonds make the significant influence on textile hand and permeability to air making them being worse.
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Zhou, Rong, Xueli Wang, Jianyong Yu, Zhenzhen Wei, and Yu Gao. "Evaluation of Luster, Hand Feel and Comfort Properties of Modified Polyester Woven Fabrics." Journal of Engineered Fibers and Fabrics 12, no. 4 (December 2017): 155892501701200. http://dx.doi.org/10.1177/155892501701200409.

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This paper reports a hollow copolyester fiber modified with polyethylene glycol and sodium-5-sulfo-bis-(hydroxyethyl)-isophthalate, abbreviated as ECDP-H, which has the potential to be a replacement for cotton. The objective evaluation of luster (contrast glossiness) and Kawabata Evaluation System for Fabrics (KES-F) (four Primary Hand Parameters and the Total Hand) of ECDP-H, PET and cotton fabrics are studied in order to investigate the cotton-like appearance of the ECDP-H. The results of moisture regain and dynamic moisture absorption values obtained indicate that the hydrophilicity of the ECDP-H fabric is better than that of PET fabric. The thermo-physiological performance for three fabrics is determined using air and water vapor permeability, wicking, warm-cooling feeling, thermal resistance and vapor resistance. The results show that the ECDP-H fabric has better hand and comfort properties than cotton.
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Veisi, Hemmat, Alireza Choobineh, Haleh Ghaem, and Zahra Shafiee. "The effect of hand tools’ handle shape on upper extremity comfort and postural discomfort among hand-woven shoemaking workers." International Journal of Industrial Ergonomics 74 (November 2019): 102833. http://dx.doi.org/10.1016/j.ergon.2019.102833.

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Mauer, Magaly H., Kent F. Burnett, Elizabeth Anne Ouellette, Gail H. Ironson, and Herbert M. Dandes. "Medical hypnosis and orthopedic hand surgery: Pain perception, postoperative recovery, and therapeutic comfort." International Journal of Clinical and Experimental Hypnosis 47, no. 2 (April 1999): 144–61. http://dx.doi.org/10.1080/00207149908410027.

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IKARASHI, Makoto, Kazuki HOKARI, Jonas A. PRAMUDITA, Masato ITO, Satoshi NODA, and Yuji TANABE. "The effects of differences in gender and hand size on the gripping comfort." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2019.31 (2019): 1C13. http://dx.doi.org/10.1299/jsmebio.2019.31.1c13.

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Gustafsson, Ewa, and Mats Hagberg. "Computer mouse use in two different hand positions: exposure, comfort, exertion and productivity." Applied Ergonomics 34, no. 2 (March 2003): 107–13. http://dx.doi.org/10.1016/s0003-6870(03)00005-x.

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Hokari, Kazuki, Makoto Ikarashi, Jonas A. Pramudita, Masato Ito, Satoshi Noda, and Yuji Tanabe. "Individual Differences in Gripping Comfort, Hand Motion and Palmar Contact Pressure during Grasping." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2019 (2019): 1008D0915. http://dx.doi.org/10.1299/jsmeatem.2019.1008d0915.

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Roh, Eui Kyung, Kyung Wha Oh, and Seong Hun Kim. "Effect of raising cycles on mechanical, comfort, and hand properties of artificial suede." Textile Research Journal 84, no. 18 (April 15, 2014): 1995–2005. http://dx.doi.org/10.1177/0040517514528561.

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This study evaluated the effect of the raising condition on the mechanical, comfort, and hand properties of artificial suede made of nylon/polyester microfibers, and identified those best suited for the consumer's needs. The suede became thicker and heavier; in addition, the wale density increased by repeated raisings as the base knits contracted and naps increased after a repeated raising process. Water vapor transmission decreased, but thermal resistance and water repellency increased. The increased number of raisings caused the suede to stiffen and not readily deform by compression; however, the suede had a soft and smooth surface. The thickness, weight, wale density, thermal resistance, and perception of luxuriousness increased between one and four cycles and remained unchanged at six cycles. The hand preference, preference for jackets, and luxuriousness of the suede improved with the number of raisings, with the best performance obtained at four raising cycles.
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Tan, Xinyang, Jiangang Cao, Thrishantha Nanayakkara, and Wei Chen. "Exploring Non-linear Correlation Between Contact Pressure and Comfort of Customised Hand Orthoses." Archives of Physical Medicine and Rehabilitation 100, no. 10 (October 2019): e75. http://dx.doi.org/10.1016/j.apmr.2019.08.216.

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Kuijt-Evers, L. F. M., T. Bosch, M. A. Huysmans, M. P. de Looze, and P. Vink. "Association between objective and subjective measurements of comfort and discomfort in hand tools." Applied Ergonomics 38, no. 5 (September 2007): 643–54. http://dx.doi.org/10.1016/j.apergo.2006.05.004.

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Hokari, Kazuki, Jonas A. Pramudita, Masato Ito, Satoshi Noda, and Yuji Tanabe. "The relationships of gripping comfort to contact pressure and hand posture during gripping." International Journal of Industrial Ergonomics 70 (March 2019): 84–91. http://dx.doi.org/10.1016/j.ergon.2019.01.010.

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Andringa, Aukje, Ingrid van de Port, and Jan-Willem Meijer. "Long-Term Use of a Static Hand-Wrist Orthosis in Chronic Stroke Patients: A Pilot Study." Stroke Research and Treatment 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/546093.

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Background. Long-term splinting, using static orthoses to prevent contractures, is widely accepted in stroke patients with paresis of the upper limb. A number of stroke patients complain about increased pain and spasticity, which leads to the nonuse of the orthosis and a risk of developing a clenched fist.Objectives. Evaluating long-term use of static hand-wrist orthoses and experienced comfort in chronic stroke patients.Methods. Eleven stroke patients who were advised to use a static orthosis for at least one year ago were included. Semistructured telephone interviews were conducted to explore the long-term use and experienced comfort with the orthosis. Data were analyzed using descriptive statistics.Results. After at least one year, seven patients still wore the orthosis for the prescribed hours per day. Two patients were unable to wear the orthosis 8 hours per day, due to poor comfort. Two patients stopped using the orthosis because of an increase in spasticity or pain.Conclusions. These pilot data suggest that a number of stroke patients cannot tolerate a static orthosis over a long-term period because of discomfort. Without appropriate treatment opportunities, these patients will remain at risk of developing a clenched fist and will experience problems with daily activities and hygiene maintenance.
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O'Hara, John M. "The Effect of Pressure Suit Gloves on Hand Performance." Proceedings of the Human Factors Society Annual Meeting 33, no. 2 (October 1989): 139–43. http://dx.doi.org/10.1177/154193128903300230.

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The effects of pressure gloves on human hand capabilities is a major concern in the performance of extravehicular activity (EVA) for space maintenance and construction missions. The effects of EVA gloves on six hand performance domains was investigated in this NASA sponsored research. They were range of motion, strength, tactile perception, dexterity, fatigue, and comfort. All tests were designed to be performed in a glove box using the barehand as well as the glove at 0 and 4.3 pressure differentials. Ten subjects participated in the test in a repeated measures design. The results of the experiments are summarized in this paper.
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Paredes, Luis, Sai Swarup Reddy, Subramanian Chidambaram, Devashri Vagholkar, Yunbo Zhang, Bedrich Benes, and Karthik Ramani. "FabHandWear." Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 5, no. 2 (June 23, 2021): 1–22. http://dx.doi.org/10.1145/3463518.

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Current hand wearables have limited customizability, they are loose-fit to an individual's hand and lack comfort. The main barrier in customizing hand wearables is the geometric complexity and size variation in hands. Moreover, there are different functions that the users can be looking for; some may only want to detect hand's motion or orientation; others may be interested in tracking their vital signs. Current wearables usually fit multiple functions and are designed for a universal user with none or limited customization. There are no specialized tools that facilitate the creation of customized hand wearables for varying hand sizes and provide different functionalities. We envision an emerging generation of customizable hand wearables that supports hand differences and promotes hand exploration with additional functionality. We introduce FabHandWear, a novel system that allows end-to-end design and fabrication of customized functional self-contained hand wearables. FabHandWear is designed to work with off-the-shelf electronics, with the ability to connect them automatically and generate a printable pattern for fabrication. We validate our system by using illustrative applications, a durability test, and an empirical user evaluation. Overall, FabHandWear offers the freedom to create customized, functional, and manufacturable hand wearables.
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Ng, M. C. F., and W. Wang. "A Study of the Receptivity to Bacterial Cellulosic Pellicle for Fashion." Research Journal of Textile and Apparel 19, no. 4 (November 1, 2015): 65–69. http://dx.doi.org/10.1108/rjta-19-04-2015-b007.

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Over the past few decades, there have been an increasing number of attempts to produce materials for fashion creation aiming at cost effectiveness, low environmental impact, labour friendliness and biodegradability. Among them, biotechnology is believed to be one of the finest substitutes for future fashion creation. A study has been carried out to explore the future development of fashion design and the possible applications of materials which can be grown from natural renewable and degradable resources. A pilot test with five design professionals on the comfort of bacterial cellulosic pellicles produced in varied incubation times and broth concentrations was conducted. This paper reports a further investigation of the receptivity to these bacterial cellulosic pellicles as material for future fashion through comparing and evaluating three comfort factors, namely hand comfort, flexibility comfort and breathability comfort, and two appearance factors, namely colour and texture, with 150 subjects using the random sampling method. The optimal favourable pellicle for fashion creation was identified and presented.
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Pertea, Mihaela, Oxana Madalina Grosu, Bogdan Veliceasa, Natalia Velenciuc, Petru Ciobanu, Razvan Tudor, Vladimir Poroch, and Sorinel Lunca. "Effectiveness and Safety of Wide Awake Local Anesthesia no Tourniquet (WALANT) Technique in Hand Surgery." Revista de Chimie 70, no. 10 (November 15, 2019): 3587–91. http://dx.doi.org/10.37358/rc.19.10.7602.

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The aim of the study was to confirm the effectiveness and safety of wide awake local anesthesia no tourniquet (WALANT) technique in hand surgery, to present our results and to encourage its use on Romania and all over the world. The study group consisted of 120 patients in which local anesthesia with 1% lidocaine and 1: 100,000 epinephrine solution was used. The conditions requiring surgery were Dupuytren disease (DD) stages II and III affecting one or two digital rays, carpal tunnel syndrome (CTS), trigger finger (TF), rupture of the flexor pollicis longus�(FPL) tendon. The amount of anesthetic used, onset time, intraoperative bleeding, surgeon�s comfort during surgery, patient�s comfort, operative time, the immediate postoperative complications and length of hospital stay were evaluated, correlations between these parameters being made with the help of SPSS 20.0 software using regressions (ANOVA), and taking into account Pearson correlation coefficients with statistical significance, alpha at most .05 and CI 95%. In the group of 120 operated patients (58 men - M and 62 female -F) (M/F ratio = 0.93), no cases of digital necrosis or other vascular complications were recorded. Also, the absence of tourniquets did not result in intraoperative bleeding causing discomfort to the surgeon. The amount of anesthetic varied, being less than that recommended in the literature in approximately 40% of the cases. In all cases, patient comfort and satisfaction were highest, and length of hospital stay was several hours. Phentolamine, an antidote used to reverse the effects of epinephrine, was not used in any case. The correlation coefficient between the amount of anesthetic and waiting time = 0.3372 (p = 0.0001) � positive, direct, moderate, and statistically significant correlation. The correlation coefficient between the amount of anesthetic and length of hospital stay = 0.2700 (p = 0.002) - positive, direct, weak and statistically significant correlation. Correlation coefficient between age and length of hospital stay = 0.1361 (p = 0.1380) - positive, direct, weak correlation, but statistically insignificant. WALANT technique is safe and has many advantages: no need it is not necessary to use the tourniquet and intravenous sedation, surgeon and patient comfort is maximum, there is no risk of finger necrosis, intraoperative collaboration and last but not the least, hospital stay is short and costs are minimal.
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M.P., Sreekanth, Rajesh Ranganathan, and Arivazhagan Pugalendhi. "Individual customization strategy accomplished by developing prototype of a laparoscopic forceps handle using additive manufacturing." Rapid Prototyping Journal 26, no. 4 (January 23, 2020): 689–97. http://dx.doi.org/10.1108/rpj-06-2019-0157.

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Purpose Laparoscopic surgeons suffer because of discomfited body posture while performing surgery and experience discomfort owing to lack of customized surgical instruments. Accordingly, this paper aims to recommend an individual customization strategy by developing an ergonomically designed laparoscopic forceps handle and thereby increase the comfort of surgeons. Design/methodology/approach Hand anthropometric parameters of 282 south Indian male subjects are used to customize the handle. uPrint and Objet260 Connex, which works based on fused deposition modeling and PolyJet, respectively, are used to fabricate the prototype of the handle. Design modifications include a pistol-type grip, the increased contact area between the hand and handle, and neutral wrist posture. Findings Ergonomic evaluation parameters such as grip, functionality, comfort and wrist posture using subjective ratings from laparoscopic surgeons were recorded and obtained average values of 4.1, 3.6, 4.1 and 4.1, respectively, based on a five-point ordinal scale. Additionally, stress analysis also confirms the safety of the handle based on von Mises stress criteria. Research limitations/implications Anthropometric data are limited to 282 subjects and subjective evaluation is conducted using a prototype, not the end-use product. Originality/value Evaluation using subjective rating confirms the ascendancy of a modified handle over the existing handle in terms of assessed parameters. The proposed individual customization strategy can be applied for other industrial hand tools to enhance comfort.
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