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Journal articles on the topic 'Breath measure'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Nazario, Emily C., David E. Cade, K. C. Bierlich, et al. "Baleen whale inhalation variability revealed using animal-borne video tags." PeerJ 10 (July 20, 2022): e13724. http://dx.doi.org/10.7717/peerj.13724.

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Empirical metabolic rate and oxygen consumption estimates for free-ranging whales have been limited to counting respiratory events at the surface. Because these observations were limited and generally viewed from afar, variability in respiratory properties was unknown and oxygen consumption estimates assumed constant breath-to-breath tidal volume and oxygen uptake. However, evidence suggests that cetaceans in human care vary tidal volume and breathing frequency to meet aerobic demand, which would significantly impact energetic estimates if the findings held in free-ranging species. In this stu

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2

Aliverti, A., B. Kayser, and P. T. Macklem. "Breath-by-breath assessment of alveolar gas stores and exchange." Journal of Applied Physiology 96, no. 4 (2004): 1464–69. http://dx.doi.org/10.1152/japplphysiol.01198.2003.

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The volume of O2 exchanged at the mouth during a breath (Vo2,m) is equal to that taken up by pulmonary capillaries (Vo2,A) only if lung O2 stores are constant. The latter change if either end-expiratory lung volume (EELV), or alveolar O2 fraction (FaO2) change. Measuring this requires breath-by-breath (BbB) measurement of absolute EELV, for which we used optoelectronic plethysmography combined with measurement of O2 fraction at the mouth to measure Vo2,A = Vo2,m - (ΔEELV·FaO2 + EELV·ΔFaO2), and divided by respiratory cycle time to obtain BbB O2 consumption (V̇o2) in seven healthy men during in

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Hadi, Kasnawi Al, Arif Budianto, Sabila Alhadawiah, Karina Alma Fidya, and Satutik Rahayu. "VOCs (Volatile Organic Compounds) Concentration Measurement in Human-Exhaled Breath - A Preliminary Study." JURNAL SAINS TEKNOLOGI & LINGKUNGAN 10, no. 4 (2024): 618–22. https://doi.org/10.29303/jstl.v10i4.728.

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VOC is a group of organic compounds that easily evaporate into the atmosphere and have various impacts on human health and the environment. Human exhaled breath and VOC is related to each other. The concentration of VOC differs from an abnormal condition to other abnormalities. However, there is limited information or study about VOC concentration in human exhaled breath. In line with this, this study aims to develop a VOC meter or a measurement system using a CCS811 sensor for human exhaled breath. This study used a CCS811 sensor, a microcontroller, and a suction pump installed inside a senso

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Fox, Lauren, Jessica Gates, Ruth De Vos, et al. "The VICTORY (Investigation of Inflammacheck to Measure Exhaled Breath Condensate Hydrogen Peroxide in Respiratory Conditions) Study: Protocol for a Cross-sectional Observational Study." JMIR Research Protocols 10, no. 7 (2021): e23831. http://dx.doi.org/10.2196/23831.

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Background More than 7% of the world’s population is living with a chronic respiratory condition. In the United Kingdom, lung disease affects approximately 1 in 5 people, resulting in over 700,000 hospital admissions each year. People with respiratory conditions have several symptoms and can require multiple health care visits and investigations before a diagnosis is made. The tests available can be difficult to perform, especially if a person is symptomatic, leading to poor quality results. A new, easy-to-perform, point-of-care test that can be performed in any health care setting and that ca

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5

Hajek, Peter. "Breath Holding and Success in Stopping Smoking: What Does Breath Holding Measure?" International Journal of the Addictions 24, no. 7 (1989): 633–39. http://dx.doi.org/10.3109/10826088909047303.

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6

Kapusta, Nestor D., Jakob Pietschnig, Paul L. Plener, Victor Blüml, Otto M. Lesch, and Henriette Walter. "Does Breath Carbon Monoxide Measure Nicotine Dependence?" Journal of Addictive Diseases 29, no. 4 (2010): 493–99. http://dx.doi.org/10.1080/10550887.2010.509280.

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7

Carpagnano, Giovanna E., Maria P. Foschino-Barbaro, Corrado Crocetta, et al. "Validation of the Exhaled Breath Temperature Measure." Chest 151, no. 4 (2017): 855–60. http://dx.doi.org/10.1016/j.chest.2016.11.013.

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8

Clark, Matthew T., Craig G. Rusin, John L. Hudson, et al. "Breath-by-breath analysis of cardiorespiratory interaction for quantifying developmental maturity in premature infants." Journal of Applied Physiology 112, no. 5 (2012): 859–67. http://dx.doi.org/10.1152/japplphysiol.01152.2011.

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In healthy neonates, connections between the heart and lungs through brain stem chemosensory pathways and the autonomic nervous system result in cardiorespiratory synchronization. This interdependence between cardiac and respiratory dynamics can be difficult to measure because of intermittent signal quality in intensive care settings and variability of heart and breathing rates. We employed a phase-based measure suggested by Schäfer and coworkers (Schäfer C, Rosenblum MG, Kurths J, Abel HH. Nature 392: 239–240, 1998) to obtain a breath-by-breath analysis of cardiorespiratory interaction. This

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Yazbeck, Roger, Gordon S. Howarth, Margaret Kosek, Geoffrey P. Davidson, and Ross N. Butler. "Breath 13CO2—evidence for a noninvasive biomarker to measure added refined sugar uptake." Journal of Applied Physiology 130, no. 4 (2021): 1025–32. http://dx.doi.org/10.1152/japplphysiol.00648.2020.

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We have found that breath 13CO2 is increased in rats and mice consuming diets high in sucrose. We also found that human breath 13CO2 is increased in humans consuming increasing amounts of sucrose. Our collective findings suggest that breath 13CO2 represents a potential marker of added dietary sugar consumption.

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Samburova, Vera, Chiranjivi Bhattarai, Matthew Strickland, et al. "Aldehydes in Exhaled Breath during E-Cigarette Vaping: Pilot Study Results." Toxics 6, no. 3 (2018): 46. http://dx.doi.org/10.3390/toxics6030046.

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Several studies have shown the presence of aldehydes (i.e., formaldehyde, acrolein) in mainstream emissions of some e-cigarettes. For this reason, concerns have been raised regarding potential toxicity. The purpose of this research was to measure levels of carbonyls in exhaled breath of e-cigarette users during “vaping” sessions and estimate the respiratory tract (RT) uptake of specific aldehydes, including formaldehyde and acetaldehyde. We measured concentrations of 12 carbonyls in e-cigarette aerosols produced directly by e-cigarettes and in the exhaled breath of 12 participants (19 sessions

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Prisk, G. Kim, Gregory M. Petersen, Eric T. Geier, and Rui C. Sá. "Ventilatory heterogeneity in the normal human lung is unchanged by controlled breathing." Journal of Applied Physiology 129, no. 5 (2020): 1152–60. http://dx.doi.org/10.1152/japplphysiol.00278.2020.

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By using MRI-based specific ventilation imaging (SVI), we showed that the heterogeneity of specific ventilation was not different comparing free breathing and breathing with the imposition of a fixed breathing frequency of 12 breaths/min. Thus, multiple-breath washout and SVI as typically performed provide an unperturbed measure of ventilatory heterogeneity.

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Singh, Bhajan, Janine A. Panizza, and Kevin E. Finucane. "Breath-by-breath measurement of the volume displaced by diaphragm motion." Journal of Applied Physiology 94, no. 3 (2003): 1084–91. http://dx.doi.org/10.1152/japplphysiol.00256.2002.

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To develop an accurate method to measure the volume displaced by diaphragm motion (ΔVdi) breath by breath, we compared ΔVdi measured by a previously evaluated biplanar radiographic method (Singh B, Eastwood PR, and Finucane KE. J Appl Physiol 91: 1913–1923, 2001) at several lung volumes during vital capacity inspirations in 10 healthy and nine hyperinflated subjects with 1) ΔVdi measured from the same chest X-rays by two previously described uniplanar methods (Petroll WM, Knight H, and Rochester DF. J Appl Physiol 69: 2175–2182, 1990; Verschakelen JA, Deschepper K, and Demendts M. J Appl Physi

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Karrasch, S., G. Eder, I. Bolle, A. Tsuda, and H. Schulz. "Breath-by-breath measurement of particle deposition in the lung of spontaneously breathing rats." Journal of Applied Physiology 107, no. 4 (2009): 1293–99. http://dx.doi.org/10.1152/japplphysiol.00096.2009.

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A number of deposition models for humans, as well as experimental animals, have been described. However, no breath-by-breath deposition measurement in rats has been reported to date. The objective of this study is to determine lung deposition of micrometer-sized particles as a function of breathing parameters in the adult rat lung. A new aerosol photometry system was designed to measure deposition of nonhygroscopic, 2-μm sebacate particles in anesthetized, intubated, and spontaneously breathing 90-day-old Wistar-Kyoto rats placed in a size-adjusted body plethysmograph box. Instrumental dead sp

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Lowe, Gemma, Mhairi Sutherland, Joe Waas, Allan Schaefer, Neil Cox, and Mairi Stewart. "Infrared Thermography—A Non-Invasive Method of Measuring Respiration Rate in Calves." Animals 9, no. 8 (2019): 535. http://dx.doi.org/10.3390/ani9080535.

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Respiration rate (RR) is a common measure of cattle health and welfare. Traditionally, measuring RR involves counting flank movements as the animal inhales and exhales with each breath. This method is often considered difficult, labour-intensive and impractical. We validated the use of infrared thermography (IRT) as an alternative method of non-invasively measuring RR in young calves. RR was simultaneously recorded in two ways: (1) by observing flank movements from video recordings; and (2) by observing thermal fluctuations around the nostrils during inhalations and exhalations from infrared r

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15

Karl, Thomas, Peter Prazeller, Dagmar Mayr, et al. "Human breath isoprene and its relation to blood cholesterol levels: new measurements and modeling." Journal of Applied Physiology 91, no. 2 (2001): 762–70. http://dx.doi.org/10.1152/jappl.2001.91.2.762.

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Numerous publications have described measurements of breath isoprene in humans, and there has been a hope that breath isoprene analyses could be a noninvasive diagnostic tool to assess blood cholesterol levels or cholesterol synthesis rate. However, significant analytic problems in breath isoprene analysis and variability in isoprene levels with age, exercise, diet, etc., have limited the usefulness of these measurements. Here, we have applied proton transfer reaction-mass spectrometry to this problem, allowing on-line detection of breath isoprene. We show that breath isoprene concentration in

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16

Winkert, Kay, Johannes Kirsten, Rupert Kamnig, Jürgen M. Steinacker, and Gunnar Treff. "Differences in V˙O2max Measurements Between Breath-by-Breath and Mixing-Chamber Mode in the COSMED K5." International Journal of Sports Physiology and Performance 16, no. 9 (2021): 1335–40. http://dx.doi.org/10.1123/ijspp.2020-0634.

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Purpose: Automated metabolic analyzers are frequently utilized to measure maximal oxygen consumption (). However, in portable devices, the results may be influenced by the analyzer’s technological approach, being either breath-by-breath (BBB) or dynamic micro mixing chamber mode (DMC). The portable metabolic analyzer K5 (COSMED, Rome, Italy) provides both technologies within one device, and the authors aimed to evaluate differences in between modes in endurance athletes. Methods: Sixteen trained male participants performed an incremental test to voluntary exhaustion on a cycle ergometer, while

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Kudo, Yudai, Saiko Kino, and Yuji Matsuura. "Vacuum Ultraviolet Absorption Spectroscopy Analysis of Breath Acetone Using a Hollow Optical Fiber Gas Cell." Sensors 21, no. 2 (2021): 478. http://dx.doi.org/10.3390/s21020478.

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Human breath is a biomarker of body fat metabolism and can be used to diagnose various diseases, such as diabetes. As such, in this paper, a vacuum ultraviolet (VUV) spectroscopy system is proposed to measure the acetone in exhaled human breath. A strong absorption acetone peak at 195 nm is detected using a simple system consisting of a deuterium lamp source, a hollow-core fiber gas cell, and a fiber-coupled compact spectrometer corresponding to the VUV region. The hollow-core fiber functions both as a long-path and an extremely small-volume gas cell; it enables us to sensitively measure the t

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Oshiro, Akiko, Takashi Zaitsu, Yuko Inoue, et al. "Concerning perceived and clinically-measured levels of halitosis." Journal of Breath Research 17, no. 1 (2022): 016003. http://dx.doi.org/10.1088/1752-7163/ac9db3.

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Abstract The different types of self-reported halitosis complaints include those where one feels that one’s breath smells bad, where one feels that one has bad breath because of the attitudes of others, and where others have pointed out the presence of bad breath. The results of previous studies comparing the objective and subjectives measures of halitosis are inconsistent, and few studies have used gas chromatography (GC) to measure halitosis in a large sample. This study aimed to examine the objectively measured halitosis levels based on the reasons individuals are concerned about halitosis.

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Smart, J. A., E. J. Pallett, and D. J. R. Duthie. "Breath interval as a measure of dynamic opioid effect." British Journal of Anaesthesia 84, no. 6 (2000): 735–38. http://dx.doi.org/10.1093/oxfordjournals.bja.a013584.

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Ling, Simon C., Sergio Amarri, Christine Slater, Anne S. Hollman, Tom Preston, and Lawrence T. Weaver. "Liver Disease Does Not Affect Lipolysis as Measured With the ¹³C‐Mixed Triacylglycerol Breath Test in Children With Cystic Fibrosis." Journal of Pediatric Gastroenterology and Nutrition 30, no. 4 (2000): 368–72. http://dx.doi.org/10.1002/j.1536-4801.2000.tb02754.x.

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ABSTRACTBackground:Liver disease associated with cystic fibrosis may not only limit the solubilisation and absorption of the products of fat digestion, but also may depress the activity of pancreatic lipase. The purpose of this study was to measure the effect of liver disease on triacylglycerol lipolysis using the 13C‐mixed triacylglycerol breath test.Methods:Forty children with cystic fibrosis took 13C‐mixed triacylglycerol with a standard breakfast and the child's normal pancreatic enzyme replacement therapy. Breath samples were collected before and every 30 minutes after ingestion for 6 hou

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Cecilia, E. García Cena, Silva Luís, H. Diaz Palencia Fabián, et al. "Internet of medical things. Measurement of respiratory dynamics using wearable sensors in post-COVID-19 patients." Enfoque UTE 14, no. 3 (2023): 36–48. https://doi.org/10.29019/enfoqueute.972.

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Nowadays, the measurement of respiratory dynamics is underrated at clinical setting and in the daily life of a subject, still representing a challenge from a technical and medical point of view. In this article we propose a concept to measure some of its parameters, such as the respiratory rate (RR), using four inertial sensors. Two different experiments were performed to validate the concept. We analyzed the most suitable placement of each sensor to assess those features and studied the reliability of the system to measure abnormal parameters of respiration (tachypnea, bradypnea and breath ho

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BJORKMAN, D. J., J. G. MOORE, P. D. KLEIN, and D. Y. GRAHAM. "13C-Bicarbonate Breath Test as a Measure of Gastric Emptying." Survey of Anesthesiology 36, no. 2 (1992): 62. http://dx.doi.org/10.1097/00132586-199204000-00011.

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Osswald, Martin, Dario Kohlbrenner, Nora Nowak, et al. "Real-Time Monitoring of Metabolism during Exercise by Exhaled Breath." Metabolites 11, no. 12 (2021): 856. http://dx.doi.org/10.3390/metabo11120856.

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Continuous monitoring of metabolites in exhaled breath has recently been introduced as an advanced method to allow non-invasive real-time monitoring of metabolite shifts during rest and acute exercise bouts. The purpose of this study was to continuously measure metabolites in exhaled breath samples during a graded cycle ergometry cardiopulmonary exercise test (CPET), using secondary electrospray high resolution mass spectrometry (SESI-HRMS). We also sought to advance the research area of exercise metabolomics by comparing metabolite shifts in exhaled breath samples with recently published data

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Singh, Satnam *. and Kumar Sandeep. "ETHOSOMES: A NEW PATHWAY FOR NOVEL DRUG DELIVERY." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 08 (2018): 7552–59. https://doi.org/10.5281/zenodo.1400646.

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<em>Biomarkers can be defined as a characteristic that can objectively measure different biological sample and that can be evaluated as an exposure marker of normal or pathogenic biological processes or of responses to a certain intervention. The biological sample are blood, red blood cells, plasma, serum, urine, nails, saliva, faeces and sample of different tissues. The analysis of breath air has major advantages because it is a non-invasive method, represents minimal risk to personnel collecting the samples and can be often sampled. Breath air samples from the human subjects were collected u

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A., Krishnamanjaripawar MD.Asif B. Lakshmiprasanna T. Samhitha M.Lavanya. "QUALITATIVE AND QUANTITATIVE DETERMINATION OF HUMAN BIOMARKER BY LASER PHOTOACOUSTIC SPECTROSCOPY METHOD." INDO AMERICAN JOURNAL OF PHARMACEUTICAL SCIENCES 05, no. 08 (2018): 7578–83. https://doi.org/10.5281/zenodo.1400658.

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<em>Biomarkers can be defined as a characteristic that can objectively measure different biological sample and that can be evaluated as an exposure marker of normal or pathogenic biological processes or of responses to a certain intervention. The biological sample are blood, red blood cells, plasma, serum, urine, nails, saliva, faeces and sample of different tissues. The analysis of breath air has major advantages because it is a non-invasive method, represents minimal risk to personnel collecting the samples and can be often sampled. Breath air samples from the human subjects were collected u

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Berdine, G. G., D. Dale, J. E. Johnson, and J. L. Lehr. "Diffusivity dependence of multiple-breath washouts of lung periphery." Journal of Applied Physiology 68, no. 1 (1990): 76–83. http://dx.doi.org/10.1152/jappl.1990.68.1.76.

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Subpleural concentrations of He and SF6 were measured during multiple-breath washouts from isolated dog lungs. Tidal volume, inspiratory flow, and frequency were in the normal range of canine ventilation. For each gas, there was a local minimum in concentration during inspiration (Cinsp) and a local maximum in concentration during exhalation (Cexp). SF6 exhibited a deeper inspiratory trough than He for each breath of every washout. For large tidal volumes (10-20 ml/kg), Cexp approximated a single exponential decay and He was cleared more rapidly than SF6. For small tidal volumes (2.5 ml/kg), C

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Lin, Yueyu, Dexter Manalili, Amir Khodabakhsh, and Simona M. Cristescu. "Real-Time Measurement of CH4 in Human Breath Using a Compact CH4/CO2 Sensor." Sensors 24, no. 4 (2024): 1077. http://dx.doi.org/10.3390/s24041077.

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The presence of an elevated amount of methane (CH4) in exhaled breath can be used as a non-invasive tool to monitor certain health conditions. A compact, inexpensive and transportable CH4 sensor is thus very interesting for this purpose. In addition, if the sensor is also able to simultaneously measure carbon dioxide (CO2), one can extract the end-tidal concentration of exhaled CH4. Here, we report on such a sensor based on a commercial detection module using tunable diode laser absorption spectroscopy. It was found that the measured CH4/CO2 values exhibit a strong interference with water vapo

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Barzilai, Maya. "“One Should Finally Learn How to Read This Breath”: Paul Celan and the Buber-Rosenzweig Bible." Comparative Literature 71, no. 4 (2019): 436–54. http://dx.doi.org/10.1215/00104124-7709613.

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Abstract This article examines Paul Celan’s use of the terms cola and breath-unit in his notes for the 1960 “Meridian” address. In the 1920s, Martin Buber and Franz Rosenzweig developed their “colometric translation” of the Bible, using the breath-unit to capture, in German, the spoken qualities of the Hebrew Bible by allowing the human breath to dictate line divisions. Celan repurposed the breath-unit for his post-Shoah poetics: it registered, for him, a further disruption of the Hebrew-German translational link, following the demise of the Jewish community of readers. Celan’s breath-unit bec

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Boutellier, U., T. Kundig, U. Gomez, P. Pietsch, and E. A. Koller. "Respiratory phase detection and delay determination for breath-by-breath analysis." Journal of Applied Physiology 62, no. 2 (1987): 837–43. http://dx.doi.org/10.1152/jappl.1987.62.2.837.

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The delay between air flow and gas concentration signals is generally assumed to be constant within a breath as well as from breath to breath, but it was not possible to examine the constancy of the delay with the delay determination techniques so far available. Thus we developed new methods for respiratory phase detection and delay determination. The presented algorithm for the detection of the start of inspiration and expiration (phase detection) replaces the generally used valve assembly with two pneumotachographs. Now, the pneumotachograph is used in a bidirectional mode, but with a volume

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Geigel, Edgar J., Richard W. Hyde, Irene B. Perillo, et al. "Rate of nitric oxide production by lower alveolar airways of human lungs." Journal of Applied Physiology 86, no. 1 (1999): 211–21. http://dx.doi.org/10.1152/jappl.1999.86.1.211.

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This report describes methods for measuring nitric oxide production by the lungs’ lower alveolar airways (V˙no), defined as those alveoli and bronchioles well perfused by the pulmonary circulation. Breath holding or vigorous rebreathing for 15–20 s minimizes removal of NO from the lower airways and results in a constant partial pressure of NO in the lower airways (Pl). Then the amount of NO diffusing into the perfusing blood will be the pulmonary diffusing capacity for NO (Dno) multiplied by Pl and by mass balance equalsV˙no, or V˙no = Dno(Pl). To measure Pl, 10 normal subjects breath held for

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Barnett, Christopher, Antonie Snel, Taher Omari, Geoff Davidson, Ross Haslam, and Ross Butler. "Reproducibility of the ¹³C‐Octanoic Acid Breath Test for Assessment of Gastric Emptying in Healthy Preterm Infants." Journal of Pediatric Gastroenterology and Nutrition 29, no. 1 (1999): 26–30. http://dx.doi.org/10.1002/j.1536-4801.1999.tb02356.x.

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ABSTRACTBackground:The 13C‐octanoic acid breath test has been used to measure gastric emptying in preterm infants, but the reproducibility of the test has not been evaluated in this population.Methods:Fifty‐six paired breath test analyses were performed on 28 healthy preterm infants 1 to 5 days apart using the same food type, volume, and energy content for each paired sample. Breath samples were taken before the feeding, at 5‐minute intervals after feeding for 30 minutes, then each 15 minutes for 4 hours. Samples were analyzed using an isotope‐ratio mass spectrometer, and 13C recovery was used

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Bastien, Marie-Claude, and Jean-Pierre Villeneuve. "Characterization of cytochrome P450 2E1 activity by the [14C]nitrosodimethylamine breath test." Canadian Journal of Physiology and Pharmacology 76, no. 7-8 (1998): 756–63. http://dx.doi.org/10.1139/y98-087.

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The objective of this study was to measure the rate of demethylation of nitrosodimethylamine in vivo in the rat and determine its value to assess CYP2E1 activity in intact animals. Nitrosodimethylamine labeled with 14C on both methyl groups was administered to rats and exhaled 14CO2 was collected during 2-3 h. The nitrosodimethylamine breath test was increased by inducers of CYP2E1, such as ethanol (+139%) and 4-methylpyrazole (+115%), and decreased by the inhibitor diallyl sulfide (-53%). In addition, the nitrosodimethylamine breath test was not changed significantly by inducers specific for

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Graham, B. L., J. T. Mink, and D. J. Cotton. "Effect of breath-hold time on DLCO(SB) in patients with airway obstruction." Journal of Applied Physiology 58, no. 4 (1985): 1319–25. http://dx.doi.org/10.1152/jappl.1985.58.4.1319.

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The single-breath diffusing capacity of the lung for CO [DLCO(SB)] is considered a measure of the conductance of CO across the alveolar-capillary membrane and its binding with hemoglobin. Although incomplete mixing of inspired gas with alveolar gas could theoretically influence overall diffusion, conventional calculations of DLCO(SB) spuriously overestimate DLCO(SB) during short breath-holding periods when incomplete mixing of gas within the lung might have the greatest effect. Using the three-equation method to calculate DLCO(SB) which analytically accounts for changes in breath-hold time, we

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Stadler, Daniel L., R. Doug McEvoy, Jana Bradley, Denzil Paul, and Peter G. Catcheside. "Changes in lung volume and diaphragm muscle activity at sleep onset in obese obstructive sleep apnea patients vs. healthy-weight controls." Journal of Applied Physiology 109, no. 4 (2010): 1027–36. http://dx.doi.org/10.1152/japplphysiol.01397.2009.

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Obese obstructive sleep apnea (OSA) patients potentially defend end-expiratory lung volume (EELV) during wakefulness via increased expiratory diaphragmatic activity (eEMGdia). A reduction in eEMGdia and EELV at sleep onset could, therefore, increase upper airway collapsibility via reduced tracheal traction. The aim of this study was to establish if eEMGdia is greater in obese OSA patients vs. healthy-weight controls during wakefulness, and to compare eEMGdia and EELV changes at sleep onset between groups as a function of stable breathing, hypopnea vs. apnea events developing within the first f

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Bigazzi, Alexander Y., Miguel A. Figliozzi, Wentai Luo, and James F. Pankow. "Breath Biomarkers to Measure Uptake of Volatile Organic Compounds by Bicyclists." Environmental Science & Technology 50, no. 10 (2016): 5357–63. http://dx.doi.org/10.1021/acs.est.6b01159.

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Muniyandi, Manivannan, and Rahul Soni. "Breath rate variability: A novel measure to study the meditation effects." International Journal of Yoga 12, no. 1 (2019): 45. http://dx.doi.org/10.4103/ijoy.ijoy_27_17.

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Davidsson, Anette, Mats Söderström, Kerstin Naidu Sjöswärd, and Birgitta Schmekel. "Chlorine in Breath Condensate – A Measure of Airway Affection in Pollinosis?" Respiration 74, no. 2 (2006): 184–91. http://dx.doi.org/10.1159/000091300.

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Shahzad, Adil Ahmad, Shafaq Mushtaq, Asim Waris, et al. "A Low-Cost Device for Measurement of Exhaled Breath for the Detection of Obstructive Lung Disease." Biosensors 12, no. 6 (2022): 409. http://dx.doi.org/10.3390/bios12060409.

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Breath sensor technology can be used in medical diagnostics. This study aimed to build a device to measure the level of hydrogen sulfide, ammonia, acetone and alcohol in exhaled breath of patients as well as healthy individuals. The purpose was to determine the efficacy of these gases for detection of obstructive lung disease. This study was conducted on a total of 105 subjects, where 60 subjects were patients of obstructive lung disease and 45 subjects were healthy individuals. Patients were screened by means of the Pulmonary Function Test (PFT) by a pulmonologist. The gases present in the ex

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Vestergaard, Mark B., and Henrik BW Larsson. "Cerebral metabolism and vascular reactivity during breath-hold and hypoxic challenge in freedivers and healthy controls." Journal of Cerebral Blood Flow & Metabolism 39, no. 5 (2017): 834–48. http://dx.doi.org/10.1177/0271678x17737909.

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The goal of the present study was to examine the cerebral metabolism and vascular reactivity during extended breath-holds (ranging from 2 min 32 s to 7 min 0 s) and during a hypoxic challenge in freedivers and non-diver controls. Magnetic resonance imaging was used to measure the global cerebral blood flow (CBF) and metabolic rate of oxygen (CMRO2), and magnetic resonance spectroscopy was used to measure the cerebral lactate, glutamate+glutamine, N-acetylaspartate and phosphocreatine+creatine concentrations in the occipital lobe. Fifteen freedivers and seventeen non-diver controls participated

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Sangha, Harbaksh, and Troy Whitacre. "Detection of Ventilator Autotriggering by an Esophageal Catheter Used to Monitor the Neural Input and Diaphragm Excitation." Journal of Intensive Care Medicine 32, no. 2 (2016): 170–73. http://dx.doi.org/10.1177/0885066616674192.

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Patient-ventilator synchrony has been the focus of attention in the field of mechanical ventilation for quite some time now. Toward that end, the modern ventilators are equipped with very sensitive pneumatic triggering mechanisms, which allow for minimal wasting of patient effort. The increasingly sensitive pneumatic triggers have the potential to cause autotriggering, where stimuli other than neural signals (eg, cardiac oscillations) can trigger the mechanical breath. Although autotriggering has been well documented in brain-dead patients, its existence is difficult to prove in patients who h

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Graham, Brian L., Joseph T. Mink, and David J. Cotton. "Implementing the Three-Equation Method of Measuring Single Breath Carbon Monoxide Diffusing Capacity." Canadian Respiratory Journal 3, no. 4 (1996): 247–57. http://dx.doi.org/10.1155/1996/567450.

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Conventional methods of measuring the single breath diffusing capacity of the lung for carbon monoxide (DLcoSB) are based on the Krogh equation, which is valid only during breath holding. Rigid standardization is used to approximate a pure breath hold manoeuvre, but variations in performing the manoeuvre cause errors in the measurement of DLcoSB. The authors previously described a method of measuring DLcoSBusing separate equations describing carbon monoxide uptake during each phase of the manoeuvre: inhalation, breath holding and exhalation. The method is manoeuvre-independent, uses all of the

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Popa, Cristina, Mihai Patachia, Stefan Banita, and Dan Constantin Dumitras. "Exertion in Kangoo Jumps Aerobic: Evaluation and Interpretation Using Spectroscopic Technique Determinations." Journal of Spectroscopy 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/602434.

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Laser photoacoustic spectroscopy (LPAS) is growing quickly in its applications to real world problems—one of the problems is to prevent obesity—being a candidate technology for breath analysis applications. The ongoing paper is aiming to investigate the evaluation of oxidative stress in womens practicing Kangoo Jumps (KJ) aerobics. Because it is not possible to directly measure free radicals in the body, we approach that by measuring the by-products (breath ethylene) that result from free radical reactions. We found out that the mixture of exhaled breath in women's after the KJ exercises conta

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Bennett, W. D., and G. C. Smaldone. "Use of aerosols to estimate mean air-space size in chronic obstructive pulmonary disease." Journal of Applied Physiology 64, no. 4 (1988): 1554–60. http://dx.doi.org/10.1152/jappl.1988.64.4.1554.

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Using in vivo measures of aerosol recovery (RC) as a function of breath-hold time (t) (Gebhart et al. J. Appl. Physiol. 51: 465-476, 1981), we estimated the mean diameter (D) of the pulmonary air spaces in subjects diagnosed with chronic obstructive pulmonary disease (COPD) (n = 8) and in subjects with normal pulmonary function (n = 10). For each subject, RC (aerosol expired/aerosol inspired) decreased exponentially with t. Based on a model of the lung as a system of randomly oriented cylindrical tubes, the half time (t1/2) (i.e., the breath-hold time to reach 50% of RC with no breath hold) is

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Yamamoto-Furusho, Jesús K., Gabriela Fonseca-Camarillo, Carlos A. Barrera-Ochoa, and Janette Furuzawa-Carballeda. "Synthesis of Interleukin-10 in Patients with Ulcerative Colitis and Helicobacter pylori Infection." Gastroenterology Research and Practice 2020 (July 6, 2020): 1–7. http://dx.doi.org/10.1155/2020/4171083.

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Background/Aims. Epidemiological evidence suggests a relationship between Helicobacter pylori infection with the development of autoimmune diseases. H. pylori elicit a chronic systemic inflammatory response with the secretion of proinflammatory cytokines. IL-10 is a regulatory cytokine that plays a central role in limiting host immune response to pathogen. Increased IL-10 levels were reported in H. pylori–infected gastric mucosa. The aim of this study was to explore the relationship between IL-10 systemic synthesis and H. pylori infection in patients with ulcerative colitis. Methods. Detection

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Liu, Nai-Yuan, Yue Deng, Francis Tsow, et al. "Evaluation of a Thermal-Based Flow Meter for Assessment of Mobile Resting Metabolic Rate Measures." Journal of Sensors 2018 (October 9, 2018): 1–8. http://dx.doi.org/10.1155/2018/9186475.

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This work evaluates the use of a new flow meter to assess exhalation rate. A mobile indirect calorimeter (MIC) was designed and used to measure resting metabolic rate (RMR), which relies on the measure of O2 consumption rate (VO2) and CO2 production rate (VCO2). The device was produced from a commercially available and well-established indirect calorimeter and implemented with a new flow meter for the purpose of this study. VO2 and VCO2 were assessed by measuring exhalation rates using the new flow meter and O2 and CO2 concentrations in breath using the original colorimetric sensors of the ind

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Seo, Hyo-Chang, Daehyeon Shin, Chae Hun Leem, and Segyeong Joo. "Development of a Portable Respiratory Gas Analyzer for Measuring Indirect Resting Energy Expenditure (REE)." Journal of Healthcare Engineering 2021 (February 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/8870749.

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Objective. A rapidly growing home healthcare market has resulted in the development of many portable or wearable products. Most of these products measure, estimate, or calculate physiologic signals or parameters, such as step counts, blood pressure, or electrocardiogram. One of the most important applications in home healthcare is monitoring one’s metabolic state since the change of metabolic state could reveal minor or major changes in one’s health condition. A simple and noninvasive way to measure metabolism is through breath monitoring. With breath monitoring by breath gas analysis, two imp

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Stanojevic, Sanja, Cole Bowerman, and Paul Robinson. "Multiple breath washout: measuring early manifestations of lung pathology." Breathe 17, no. 3 (2021): 210016. http://dx.doi.org/10.1183/20734735.0016-2021.

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The multiple breath washout (MBW) test measures the efficiency of gas mixing in the lungs and has gained significant interest over the past 20 years. MBW outcomes detect early lung function impairment and peripheral airway pathology, through its main outcome measure lung clearance index (LCI). LCI measures the number of lung turnovers required to washout an inert tracer gas. MBW is performed during normal (tidal) breathing, making it particularly suitable for young children or those who have trouble performing forced manoeuvres. Additionally, research in chronic respiratory disease populations

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Stanojevic, Sanja, Cole Bowerman, and Paul Robinson. "Multiple breath washout: measuring early manifestations of lung pathology." Breathe 17, no. 3 (2021): 210016. http://dx.doi.org/10.1183/20734735.0016-2021.

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The multiple breath washout (MBW) test measures the efficiency of gas mixing in the lungs and has gained significant interest over the past 20 years. MBW outcomes detect early lung function impairment and peripheral airway pathology, through its main outcome measure lung clearance index (LCI). LCI measures the number of lung turnovers required to washout an inert tracer gas. MBW is performed during normal (tidal) breathing, making it particularly suitable for young children or those who have trouble performing forced manoeuvres. Additionally, research in chronic respiratory disease populations

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Apriantono, Tommy, Wildan Bahrul U’Lum, Nia Sri Ramania, and Bagus Winata. "Physiological response in professional female soccer players." Journal of Human Sport and Exercise 20, no. 1 (2024): 290–301. https://doi.org/10.55860/4jgsky33.

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The aim of this study was to describe the physiological characteristics and energetic requirements of small-side games (SSG) in female players by means of ambulatory gas exchange measurements using a breath-by-breath (B × B) approach. Eight female professional soccer players participated in this study. This study was divided into two sessions: laboratory exercise testing and SSG field testing. Both tests were performed using simultaneous gas exchange measurements. The incremental ramp exercise test was performed using portable metabolic carts breath by breath (B×B) and a treadmill, to measure

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IINUMA, Mariko. "13C-phenacetin breath test as a measure of liver function in cirrhotics." Kanzo 32, no. 1 (1991): 43–50. http://dx.doi.org/10.2957/kanzo.32.43.

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