Academic literature on the topic 'Stenosis'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Stenosis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Stenosis"

1

Magee, T. R., A. H. Davies, R. N. Baird, and M. Horrocks. "Blood Flow in the Internal Carotid Artery and Velocity in the Middle Cerebral Artery during Carotid Endarterectomy." Cardiovascular Surgery 2, no. 1 (1994): 37–40. http://dx.doi.org/10.1177/096721099400200108.

Full text
Abstract:
A stenosing atherosclerotic plaque of the internal carotid artery acts as a source of emboli and may impede flow. The contribution made by a stenosed carotid artery to cerebral perfusion is unclear. This study examined blood flow in the internal carotid artery and a comparison was made with the effect of clamping on flow velocity in the middle cerebral artery. Some 50 patients were assessed before carotid endarterectomy by preoperative duplex scanning, triplanar arteriography and transcranial Doppler ultrasonography. At operation, maximal flow in the internal carotid artery was measured using
APA, Harvard, Vancouver, ISO, and other styles
2

Al-Azawy, Mohammed Ghalib, Zahraa Ahmed Hamza, and Alaa Ahmed Alkinani. "Non-invasive evaluation of blood flow through a healthy and stenosed coronary artery." Wasit Journal of Engineering Sciences 10, no. 3 (2023): 58–74. http://dx.doi.org/10.31185/ejuow.vol10.iss3.369.

Full text
Abstract:
The current numerical analysis was utilised to compare the hemodynamic effects caused by flow disruptions in coronary arteries with and without stenosis in order to evaluate the hemodynamic importance of patient-specific coronary stenosis using Computational Fluid Dynamics (CFD) to provide information to the public, particularly surgeons, and assist them in reducing the risk of stenosis. Assuming the flow is turbulent and non-Newtonian viscosity, the Carreau model is incorporated by utilizing STAR-CCM+ 2021.2.1. The test model is a patient-specific coronary stenosis with area stenosis (60%). T
APA, Harvard, Vancouver, ISO, and other styles
3

BANERJEE, MOLOY K., DEBABRATA NAG, RANJAN GANGULY, and AMITAVA DATTA. "HEMODYNAMICS IN STENOSED ARTERIES — EFFECTS OF STENOSIS SHAPES." International Journal of Computational Methods 07, no. 03 (2010): 397–419. http://dx.doi.org/10.1142/s021987621000226x.

Full text
Abstract:
A numerical analysis has been carried out to investigate the hemodynamic flow through stenosed arteries having mild (S = 25%) to severe (S = 65%) occlusions and under different regimes of flow Reynolds numbers ( Re ) ranging from 50 to 400. Influence of different stenosis shapes (rectangular, trapezoidal, cosine, and Gaussian) on key hemodynamic parameters e.g., recirculation length, wall shear stress (WSS), pressure drop, and irreversible pressure loss coefficient (C I ) are studied. It has been observed that for S = 25%, no flow separation takes place with cosine and Gaussian shaped stenoses
APA, Harvard, Vancouver, ISO, and other styles
4

Liu, H., X. Wu, Y. Xing, K. Liu, and H. Zhang. "Neurology (Stroke)." Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques 42, S1 (2015): S36. http://dx.doi.org/10.1017/cjn.2015.165.

Full text
Abstract:
Background: Cerebral artery stenosis is an important risk factor for ischemic strokes. This study aims to explore intracranial and extracranial artery stenosis in a large northeast Chinese cohort. Methods: We recruited 14793 outpatients and hospitalized patients to identify cerebral artery stenosis. Artery stenosis screening was done with transcranial Doppler (TCD) for intracranial arteries and carotid duplex sonography for extracranial arteries. Results: More intracranial than extracranial artery stenoses were identified (4255 versus 2809, i.e. 28.8% versus 19.0%, P<0.05). Similarly, mere
APA, Harvard, Vancouver, ISO, and other styles
5

Tong, Y., P. G. Matthews, and J. P. Royle. "Outcome of Endovascular Intervention for Infrainguinal Vein Graft Stenosis." Cardiovascular Surgery 10, no. 6 (2002): 545–50. http://dx.doi.org/10.1177/096721090201000605.

Full text
Abstract:
Assisted graft patency rate following revision of a graft stenosis is far better than that following thrombectomy of an occluded graft. Graft revision by endovascular means has been proposed as a suitable alternative to more invasive surgery. This study reports our experience with endovascular treatment of vein graft stenosis. Between December 1992 and September 2000, percutaneous transluminal balloon angioplasty (PTA) was performed on 90 vein graft stenoses in 87 infrainguinal vein bypass grafts identified by routine graft duplex scan (peak systolic velocity, PSV > 300 cm/sec). All 90 sten
APA, Harvard, Vancouver, ISO, and other styles
6

Liu, Biyue, and Dalin Tang. "Influence of Distal Stenosis on Blood Flow Through Coronary Serial Stenoses: A Numerical Study." International Journal of Computational Methods 16, no. 03 (2019): 1842003. http://dx.doi.org/10.1142/s0219876218420033.

Full text
Abstract:
Computer simulations of the blood flow through right coronary arteries with two stenoses in the same arterial segment are carried out to investigate the interactions of serial stenoses, especially the effect of the distal stenosis. Various mathematical models are developed by varying the location of the distal stenosis. The numerical results show that the variation of the distal stenosis has significant impact on coronary hemodynamics, such as the pressure drop, flow shifting, wall shear stress and flow separation. Our simulations demonstrate that the distal stenosis has insignificant effect o
APA, Harvard, Vancouver, ISO, and other styles
7

Lougheed, Nick, Jeff Jaskolka, Rob Beecroft, and Ravi Menezes. "Determination of the Best Parameter for Defining the Hemodynamic Significance of an Iliac Artery Stenosis Detected on Computed Tomography Angiography." Canadian Association of Radiologists Journal 67, no. 3 (2016): 298–303. http://dx.doi.org/10.1016/j.carj.2015.09.005.

Full text
Abstract:
Purpose The purpose of this study was to determine the best parameter, derived from computed tomography angiography (CTA) for accurate prediction of a hemodynamically significant stenosis of the common or external iliac artery. Methods A retrospective keyword search was performed on the Radiology Information System at our tertiary academic medical centre. Reports from January 2008 to September 2013 were searched using the keywords iliac, stenosis, and pressure. Patients who had both and CTA and a pelvic angiogram with pressure measurements obtained across a potential stenosis were selected. Us
APA, Harvard, Vancouver, ISO, and other styles
8

Varnava, A. M., and M. J. Davies. "Relation between coronary artery remodelling (compensatory dilatation) and stenosis in human native coronary arteries." Heart 86, no. 2 (2001): 207–11. http://dx.doi.org/10.1136/hrt.86.2.207.

Full text
Abstract:
OBJECTIVESTo investigate the contribution of plaque size and vessel remodelling to coronary artery stenosis and to assess the role of vessel shrinkage (negative remodelling) across a wide range of lesions.DESIGNPostmortem study of coronary remodelling in perfusion fixed hearts.SUBJECTS24 men and 24 women who died suddenly with coronary artery disease.MAIN OUTCOME MEASURESPercentage stenosis, percentage plaque burden, percentage remodelling, and arc of normal vessel were measured and related to age, sex, smoking status, and history of hypertension.RESULTSThere was a positive relation between pe
APA, Harvard, Vancouver, ISO, and other styles
9

Loree, H. M., R. D. Kamm, C. M. Atkinson, and R. T. Lee. "Turbulent pressure fluctuations on surface of model vascular stenoses." American Journal of Physiology-Heart and Circulatory Physiology 261, no. 3 (1991): H644—H650. http://dx.doi.org/10.1152/ajpheart.1991.261.3.h644.

Full text
Abstract:
Turbulence frequently develops when blood passes through a stenosis. To study the hypothesis that turbulence near a plaque surface can cause pressure fluctuations that may promote plaque rupture, models of intravascular stenoses were studied. Experimental conditions simulated peak flow in the coronary and carotid arteries through a stenosis of 80 or 90% diameter reduction and into a region where the plaque had widened distally to a 50-75% stenosis. For symmetric stenoses at carotid artery flow rates, peak pressure fluctuations were observed 1-1.5 upstream diameters distal to the stenosis, but
APA, Harvard, Vancouver, ISO, and other styles
10

Tirinescu, Dacian Călin, Cosmina Ioana Bondor, Dan Ştefan Vlăduțiu, et al. "Ultrasonographic diagnosis of stenosis of native arteriovenous fistulas in haemodialysis patients." Medical Ultrasonography 18, no. 3 (2016): 332. http://dx.doi.org/10.11152/mu.2013.2066.183.fis.

Full text
Abstract:
Aims: Ultrasound (US) examination is an important tool in the diagnosis of arteriovenous (AVF) stenoses; different US measures are available for assessing the severity of stenoses. The aim of our study was to analyse risk factors and consequences of AVF stenosis and its severity and to compare the usefulness of different US measures of stenoses’ severity. Material and methods: Ninety-seven prevalent patients from a single dialysis centre with patent AVF were included. We recorded history of disease, clinical and laboratory data. US was used to diagnosis the stenosis and to measure blood flow i
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Stenosis"

1

Johansson, Elias. "Carotid stenosis." Doctoral thesis, Umeå universitet, Institutionen för folkhälsa och klinisk medicin, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46396.

Full text
Abstract:
Carotid stenosis is one of several causes of ischemic stroke and entails a high risk of ischemic stroke recurrence. Removal of a carotid stenosis by carotid endarterectomy results in a risk reduction for ischemic stroke, but the magnitude of risk reduction depends on several factors. If the delay between the last symptom and carotid endarterectomy is less than 2 weeks, the absolute risk reduction is >10%, regardless of age, sex, or if the degree of carotid stenosis is 50–69% or 70–99%. Thus, speed is the key. However, if many patients suffers an ischemic stroke recurrence within the first 2
APA, Harvard, Vancouver, ISO, and other styles
2

Lee, Paul Man-Yiu. "Critical coronary stenosis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq23948.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Eklöf, Hampus. "On Renal Artery Stenosis." Doctoral thesis, Uppsala University, Department of Oncology, Radiology and Clinical Immunology, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5945.

Full text
Abstract:
<p>Renal artery stenosis (RAS) is a potentially curable cause of hypertension and azotemia. Besides intra-arterial renal angiography there are several non-invasive techniques utilized to diagnose patients with suspicion of renal artery stenosis. Removing the stenosis by revascularization to restore unobstructed blood flow to the kidney is known to improve and even cure hypertension/azotemia, but is associated with a significant complication rate. </p><p>To visualize renal arteries with x-ray techniques a contrast medium must be used. In a randomized, prospective study the complications of two
APA, Harvard, Vancouver, ISO, and other styles
4

Kragsterman, Björn. "Carotid Artery Stenosis : Surgical Aspects." Doctoral thesis, Uppsala University, Department of Surgical Sciences, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6834.

Full text
Abstract:
<p>Randomised controlled trials (RCT) have demonstrated a net benefit of carotid endarterectomy (CEA) in stroke prevention for patients with severe carotid artery stenosis as compared to best medical treatment. Results in routine clinical practice must not be inferior to those in the RCTs. The carotid arteries are clamped during CEA which may impair the cerebral perfusion. </p><p>The aim of this thesis was to assess population-based outcomes from CEA, investigate risk factors for perioperative complications/late mortality and to evaluate effects of carotid clamping during CEA. In the Swedish v
APA, Harvard, Vancouver, ISO, and other styles
5

Kragsterman, Björn. "Carotid artery stenosis : surgical aspects /." Uppsala : Acta Universitatis Upsaliensis : Univ.bibl. [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6834.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

McCann, Gerald Patrick. "Exercise limitation in aortic stenosis." Thesis, University of Glasgow, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395082.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Pawade, Tania Ashwinikumar. "Imaging calcification in aortic stenosis." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/29589.

Full text
Abstract:
BACKGROUND Aortic stenosis is a common and potentially fatal condition in which fibro-calcific changes within the valve leaflets lead to the obstruction of blood flow. Severe symptomatic stenosis is an indication for aortic valve replacement and timely referral is essential to prevent adverse clinical events. Calcification is believed to represent the central process driving disease progression. 18F-Fluoride positron emission tomography computed tomography (PET-CT) and CT aortic valve calcium scoring (CT-AVC) quantify calcification activity and burden respectively. The overarching aim of this
APA, Harvard, Vancouver, ISO, and other styles
8

Boyd, C. S. "Radiological evaluation of renal artery stenosis." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.426973.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kattach, Hassan. "Blood pressure control in aortic stenosis." Thesis, University of Oxford, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526473.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Försth, Peter. "On Surgery for Lumbar Spinal Stenosis." Doctoral thesis, Uppsala universitet, Institutionen för kirurgiska vetenskaper, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-262525.

Full text
Abstract:
The incidence of lumbar spinal stenosis (LSS) is steadily rising, mostly because of a noticeably older age structure. In Sweden, LSS surgery has increased continuously over the years and is presently the most common argument to undergo spine surgery. The purpose of the surgery is to decompress the neural elements in the stenotic spinal canal. To avoid instability, there has been a tradition to do the decompression with a complementary fusion, especially if degenerative spondylolisthesis is present preoperatively. The overall aims of this thesis were to evaluate which method of surgery that gen
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Stenosis"

1

Parakh, Neeraj, Ravi S. Math, and Vivek Chaturvedi, eds. Mitral Stenosis. CRC Press, 2018. http://dx.doi.org/10.1201/9781315166735.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Abbas, Amr E., ed. Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ibrahim, Ashraf, and Talal Al-Malki. Congenital Esophageal Stenosis. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10782-6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Manfrè, Luigi, ed. Spinal Canal Stenosis. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26270-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Postacchini, Franco. Lumbar Spinal Stenosis. Springer Vienna, 1989. http://dx.doi.org/10.1007/978-3-7091-9021-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Postacchini, Franco. Lumbar spinal stenosis. Springer-Verlag, 1989.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

D, Rittenberg Joshua, ed. Lumbosacral spinal stenosis. W.B. Saunders, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

1942-, Andersson Gunnar, and McNeill Thomas W. 1936-, eds. Lumbar spinal stenosis. Mosby Year Book, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

National Institute of Diabetes and Digestive and Kidney Diseases (U.S.), ed. Renal artery stenosis. U.S. Dept. of Health and Human Services, National Institutes of Health, National Institute of Diabetes and Digestive and Kidney Diseases, 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Denaro, Vincenzo. Stenosis of the cervical spine: Causes, diagnosis, and treatment. Springer-Verlag, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Stenosis"

1

Wood, Frances O., and Amr E. Abbas. "General Considerations and Etiologies of Aortic Stenosis." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Gallagher, Michael J. "Prosthetic Aortic Valves and Diagnostic Challenges." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mack, Michael J., and Amr E. Abbas. "Risk Prediction Models, Guidelines, Special Populations, and Outcomes." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Shannon, Francis L., Marc P. Sakwa, and Robert L. Johnson. "Surgical Management of Aortic Valve Stenosis." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_12.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Berman, Aaron David. "Balloon Aortic Valvuloplasty." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Poon, Karl K. C. "Imaging for Transcatheter Aortic Valve Replacement." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hanzel, George S. "Transcatheter Aortic Valve Replacement." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Zacharias, Sibin K., and James A. Goldstein. "Clinical Assessment of the Severity of Aortic Stenosis." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Abbas, Amr E., and Philippe Pibarot. "Physiological Basis for Area and Gradient Assessment: Hemodynamic Principles of Aortic Stenosis." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Abbas, Amr E. "Different Classifications of Aortic Stenosis." In Aortic Stenosis. Springer London, 2015. http://dx.doi.org/10.1007/978-1-4471-5242-2_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Stenosis"

1

D’Souza, Gavin, Srikara V. Peelukhana, and Rupak K. Banerjee. "Misinterpretation of Stenosis Severity in the Presence of Serial Coronary Stenoses: An In-Vitro Study." In ASME 2013 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/sbc2013-14623.

Full text
Abstract:
In patients with multiple stenoses in the same coronary artery, the severity of one stenosis influences the diagnosis of the serial stenosis. Currently used diagnostic end-point, Fractional Flow Reserve, FFR (ratio of distal to proximal pressure of a stenotic region), has a cut-off point of 0.75. A value of FFR &lt; 0.75 leads to a clinical intervention. However, FFR may fail to account for multiple stenoses interactions and might lead to clinical misinterpretation of one serial stenosis severity. In order to assess the effect of one stenosis on the other serial stenosis, we tested three combi
APA, Harvard, Vancouver, ISO, and other styles
2

Kolli, Kranthi K., Mohamed Effat, Imran Arif, et al. "Functional and Anatomical Diagnosis of Coronary Artery Stenoses: A Retrospective Study in Humans." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80552.

Full text
Abstract:
Fractional flow reserve (FFR: ratio of distal to proximal pressure of a stenotic section) is used to evaluate hemodynamic significance of epicardial stenosis. However, FFR and coronary flow reserve (CFR: ratio of hyperemic blood velocity to that of resting condition) are used in conjunction to evaluate combination of both epicardial and microvascular disease. It has been proposed that optimization of cutoff values for diagnostic parameters in determining stenosis severity depends on coupling functional (pressure and velocity) and anatomical data (% area stenosis). We hypothesize that, pressure
APA, Harvard, Vancouver, ISO, and other styles
3

Stanković, Ivana, Sonja Radenković, and Nikola Laban. "The Role of Computed Tomography (CT) in the Diagnosis of Renovascular Hypertension in Early Vascular Aging." In 7th International Congress of Cardionephrology KARNEF 2025. Punta Niš, 2025. https://doi.org/10.46793/karnef25.286s.

Full text
Abstract:
Atherosclerosis of the renal arteries is the leading cause of renovascular hypertension. In addition to stenosis of the renal arteries greater than 75%, stenoses greater than 50% with post-stenotic dilation can also lead to renovascular hypertension.
APA, Harvard, Vancouver, ISO, and other styles
4

Bergman, Harris L., John M. Siegel, John N. Oshinski, Roderic I. Pettigrew, and David N. Ku. "Computational Simulation of Magnetic Resonance Angiograms in Stenotic Vessels: Effect of Stenosis Severity." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-1231.

Full text
Abstract:
Abstract Post stenotic signal loss limits the widespread use of magnetic resonance (MR) angiography. The signal loss causes ambiguity when determining the degree of stenosis and when assessing patency. Thus it is important to devise strategies for reducing signal loss associated with stenoses.
APA, Harvard, Vancouver, ISO, and other styles
5

Goswami, Ishan, Srikara V. Peelukhana, Marwan Al-Rjoub, Lloyd H. Back, and Rupak K. Banerjee. "Influence of Variable Native Arterial Diameter on Fractional Flow Reserve: An In-Vitro Study." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80881.

Full text
Abstract:
Fractional flow reserve (FFR), the ratio of the pressures distal (Pd) and proximal (Pa) to a stenosis, and coronary flow reserve (CFR), the ratio of flows at maximal vasodilation to the resting condition, are widely used for determining the functional severity of a coronary artery stenosis. However, the diameter of the native artery might influence the FFR values. Therefore, using an in-vitro experimental study, we tested the variation of FFR for two arterial diameters, 2.5 mm (N1) and 3 mm (N2). We hypothesize that FFR is not influenced by native arterial diameter. For both N1 and N2, vasodil
APA, Harvard, Vancouver, ISO, and other styles
6

Mahmoudzadeh Akherat, Seyed Mohammad Javid, and Morteza Kimiaghalam. "A Numerical Investigation on Pulsatile Blood Flow Through Consecutive Axi-Symmetric Stenosis in Coronary Artery." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24534.

Full text
Abstract:
The objective of this research is the determination of the wall shear stress (WSS) and velocity distribution patterns in axi-symmetric single or repeated stenoses in coronary arteries. The blood flow is modeled as an incompressible laminar flow with Re = 500 and the analysis is performed for both Newtonian and non-Newtonian blood behaviors. For the single stenosis cases, the area reduction of 25%, 64% and 75% are considered, while for the consecutive stenosis cases two sets of 64%, 25%, and 75%, 64% for the first and second stenosis are examined numerically respectively. Single stenosis cases
APA, Harvard, Vancouver, ISO, and other styles
7

Tang, Dalin, Chun Yang, Zhongdan Huan, and David N. Ku. "Effects of Stenosis Asymmetry on Blood Flow in Stenotic Arteries and Wall Compression." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-0384.

Full text
Abstract:
Abstract Severe stenoses in arteries cause critical flow conditions which may be related to thrombus formation, artery compression and plaque cap rupture. The exact mechanism of these events and the conditions causing them are not well understood. Considerable work for flow in stenotic tubes have been reported in last twenty years and many interesting phenomena such as flow limitation, choking, flutter and wall collapse have been observed [3]. Stenosis severity, wall compliance and pressure conditions have been identified as dominating factors affecting wall deformation and flow and pressure f
APA, Harvard, Vancouver, ISO, and other styles
8

Ju, Siyeong, and Linxia Gu. "Numerical Analysis of Blood Flow Through Discrete Stenosis: Role of Eccentricity and Spacing Ratio." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3546.

Full text
Abstract:
Stenosis or narrowing of arteries induces a turbulent flow region downstream. Multiple stenosis may lead to flow interference and further disturb the blood flow. This has important clinical implications [1], such as disturbed blood flow and flow recirculation which were correlated with the development of atherosclerosis by upregulating the endothelial cells genes and proteins that cause atherogenesis [2]. Numerical simulation of concentric stenoses by Lee et al [3] have shown that the recirculation zone following the first concentric stenosis affected the flow field at the downstream of the se
APA, Harvard, Vancouver, ISO, and other styles
9

Liepsch, D., G. Pflugbeil, J. Fischer, and C. Weigand. "Flow Visualization and LDA Measurements in Human Carotid Artery Models." In ASME 1996 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1996. http://dx.doi.org/10.1115/imece1996-1187.

Full text
Abstract:
Abstract Flow parameters including pulsatile flow, wall distensibility, the non-Newtonian flow of blood in flow separation regions and high/low blood pressure, were studied in models of a healthy carotid artery model (37° bifurcation angle between the internal and external carotid artery), a 90% stenosis in the internal carotid artery and an 80% stenosis in both the internal and external carotid arteries. The goal of the study was to analyze the flow in detail, measuring the local velocity components. This knowledge is important for the interpretation of ultrasound measurements in vivo. Elasti
APA, Harvard, Vancouver, ISO, and other styles
10

D’Souza, Gavin A., Srikara V. Peelukhana, and Rupak K. Banerjee. "Misinterpretation of Stenosis Severity in the Presence of Serial Coronary Stenoses." In ASME 2013 Conference on Frontiers in Medical Devices: Applications of Computer Modeling and Simulation. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/fmd2013-16180.

Full text
Abstract:
Diagnosis of the functional severity of an epicardial coronary stenosis using parameters like Fractional Flow Reserve, FFR (ratio of distal to proximal pressure of a stenotic region), might be affected in the presence of an additional downstream stenosis. In order to assess this effect, we have performed an in-vitro experiment which is used to validate a computational study. Three combinations of serial stenoses were tested: 80%-64%, 80%-80% and 80%-90% area stenosis (AS). The physiological mean hyperemic flow (flow at maximal arterial dilatation) values were obtained using an in-vitro experim
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Stenosis"

1

Schneider, Michael. Lumbar Spinal Stenosis. Patient-Centered Outcomes Research Institute® (PCORI), 2021. http://dx.doi.org/10.25302/2.2019.cer.587ce.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

wu, ruiqing. Efficacy and Complications of Extreme Lateral Interbody Fusion (XLIF) for lumbar spinal stenosis:A Meta-Analysis and Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.2.0085.

Full text
Abstract:
Review question / Objective: P? Patients with Lumbar Spinal Stenosis. I? Extreme Lateral Interbody Fusion (XLIF). C? Other lumbar interbody fusions. O?Predefined outcome measures were preoperative and postoperative visual analogue scale back and/or leg pain (VAS-BP) and Oswestry Disability Index (ODI) score; operation time; intraoperative blood loss; length of hospital stay; and the complications, reoperation and fusion rate. S: randomized controlled trials (RCTs) or nonrandomized cohort studies. Condition being studied: Extreme Lateral Interbody Fusion (XLIF) can be widely used for the treatm
APA, Harvard, Vancouver, ISO, and other styles
3

Charatsi, Dimitra, Polyxeni Vanakara, Michail Nikolaou, et al. Vaginal Dilator Use to Promote Sexual Wellbeing After Radiotherapy in Gynaecological Cancer Survivors: A Prospective Observational Study. Science Repository, 2021. http://dx.doi.org/10.31487/j.ijcst.2021.03.01.sup.

Full text
Abstract:
Background: Since continuing advances in radiotherapy technology broaden the role of radiotherapy in the treatment of gynaecologic malignancies, the use of vaginal dilators has been introduced in order to mitigate the risk of vaginal stenosis. The main aims of this study were to investigate the vaginal dilator use efficacy in the treatment of radiation-induced vaginal stenosis and the vaginal dilator effect on sexual quality of life. Methods: We studied fifty-three patients with endometrial or cervical cancer. The participants were treated with radical or adjuvant external beam radiotherapy an
APA, Harvard, Vancouver, ISO, and other styles
4

Dingli, Philip, Nieves Gonzalo, and Javier Escaned. Intravascular Ultrasound-guided Management of Diffuse Stenosis. Radcliffe Cardiology, 2018. http://dx.doi.org/10.15420/rc.2018.m005.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Gelbard, Alexander, and David Francis. Comparing Results of Three Treatments for Idiopathic Subglottic Stenosis. Patient-Centered Outcomes Research Institute (PCORI), 2020. http://dx.doi.org/10.25302/04.2020.cer.140922214.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Li, Yu, Wenhao Cui, Jukun Wang, et al. Percutaneous revascularization for atherosclerotic renal artery stenosis: a meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.7.0052.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Zhang, Meilin, and Ang Zheng. Percutaneous revascularization for atherosclerotic renal artery stenosis: a meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, 2022. http://dx.doi.org/10.37766/inplasy2022.7.0053.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Schneider, Michael, Carlo Ammendolia, Donald Murphy, et al. A Comparison of Nonsurgical Treatment Methods for Patients With Lumbar Spinal Stenosis. Patient- Centered Outcomes Research Institute (PCORI), 2019. http://dx.doi.org/10.25302/2.2019.cer.141025056.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Schneider, Michael, Carlo Ammendolia, Donald Murphy, et al. A Comparison of Nonsurgical Treatment Methods for Patients With Lumbar Spinal Stenosis. University of Pittsburgh at Pittsburgh, 2019. http://dx.doi.org/10.25302/2.2019.cer.587.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dimitrov, Svetoslav, Iliyan Petrov, Violeta Grudeva, Valentin Govedarski, Todor Zahariev та Gencho Nachev. Assessment of Carotid Artery Stenosis – Comparative Anаlysis between Duplex Ultrasonography and CT Angiography. "Prof. Marin Drinov" Publishing House of Bulgarian Academy of Sciences, 2020. http://dx.doi.org/10.7546/crabs.2020.03.14.

Full text
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!