Abstract：
:Catheter-delivered intravascular probes are widely used in clinical practice to measure coronary arterial velocity and pressure, but the artefactual effect of the probe on the variables being measured is not well characterised. A coronary artery was simulated with a 180 degrees curved tube 3mm in diameter and the effect of catheters of different diameters was modelled numerically under pulsatile flow conditions. The presence of a catheter increased pressure by 1.3-4.3 mmHg depending on its diameter, and reduced velocity-pressure phase-lag. For an ultrasound sample volume 5mm downstream from the probe tip, the underestimation in velocity measurement attributed to catheter blockage is approximately 15-21% for an average inlet velocity of 0.1m/s. The velocity measurement error is lower at higher mean flow velocity. Accuracy of clinical velocity measurements could be improved by moving the sample volume farther downstream from the probe tip, because the centrifugal pressure gradient intrinsic to the curvature promotes re-development of flow.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Torii R,Wood NB,Hughes AD,Thom SA,Aguado-Sierra J,Davies JE,Francis DP,Parker KH,Xu XYdoi
10.1016/j.jbiomech.2006.11.004subject
Has Abstractpub_date
2007-01-01 00:00:00pages
2501-9issue
11eissn
0021-9290issn
1873-2380pii
S0021-9290(06)00446-5journal_volume
40pub_type
杂志文章abstract：:A technique was developed to investigate the condylar displacement of the human temporomandibular joint. Condylar displacement was analyzed from magnetic resonance images of the joint. Fourteen static images were obtained during incremental jaw closure. Landmarks were identified on the magnetic resonance images and re...
journal_title：Journal of biomechanics
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abstract：:Mandibular advancement splints (MAS), which protrude the lower jaw during sleep, are recognized as an effective treatment for obstructive sleep apnea (OSA) through their action of enlarging the airway space and preventing upper airway collapse. However a clinical challenge remains in preselecting patients who will res...
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abstract：:Nerve compression due to intervertebral disc (IVD) bulging is a known mechanism for low back pain and typically occurs in the posterior region of the disc. Most in vitro studies are limited in the ability to quantify the magnitude of bulging on the posterior aspect of the disc due to the boney structures that occlude ...
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abstract：:Spinal arthrodesis continues to expand in clinical indications and surgical practice. Despite a century of study, failure of bone formation or pseudarthrosis can occur in individual patients with debilitating clinical symptoms. Here we review biological and technical aspects of spinal fusion under active investigation...
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pub_type： 杂志文章,评审
doi：10.1016/j.jbiomech.2010.10.021
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abstract：:The objective assessment of biomechanical asymmetries during movement tasks is used to monitor rehabilitation following anterior cruciate ligament reconstruction (ACLR). Marker placement is an important source of methodological variability within human motion analysis. It is currently unclear how marker placement erro...
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abstract：:Topically applied microbicide gels can provide a self-administered and effective strategy to prevent sexually transmitted infections (STIs). We have investigated the interplay between vaginal tissue elasticity and the yield-stress of non-Newtonian fluids during microbicide deployment. We have developed a mathematical ...
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(98)00030-x
更新日期：1998-05-01 00:00:00
abstract：:The principal motivation for the present work was the study of the kinetics of anaerobic metabolism. A new mathematical model of the bioenergetics of sprinting, incorporating a three-equation representation of anaerobic metabolism, is developed. Results computed using the model are compared with measured data from the...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(00)00035-x
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abstract：:The present article investigates the influence of center-of-mass movements on the variation of the structure in human postural sway. Twelve healthy younger persons performed 60s quiet standing, 60s relaxed standing, and 10 min relaxed standing on two force plates. Center-of-pressure (CoP) and gravitational line (GL) p...
journal_title：Journal of biomechanics
pub_type： 临床试验,杂志文章
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journal_title：Journal of biomechanics
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更新日期：1996-03-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2016-12-08 00:00:00
abstract：:Risk for injury during a fall depends on the position and velocity of the body segments at the moment of impact. One technique for reducing impact velocity is to absorb energy in the lower extremity muscles during descent, as occurs during squatting or sitting. However, the protective value of this response may depend...
journal_title：Journal of biomechanics
pub_type： 临床试验,杂志文章
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2018-11-16 00:00:00
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journal_title：Journal of biomechanics
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doi：10.1016/j.jbiomech.2007.11.012
更新日期：2008-01-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
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abstract：:To know the contributions of blood pressure induced stress to the progression of atherosclerosis and the rupture of atheroma, cross-sectional distributions of stresses in atherosclerotic walls were calculated by finite element method, using stress-strain data of aortic walls and atherosclerotic plaques obtained from h...
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