Abstract:
OBJECTIVE:To evaluate whether outcomes based on stopwatch time and power output (PO) over a 15m-overground wheelchair sprint test can be used to assess wheelchair-specific anaerobic work capacity, by studying their relationship with outcomes on a Wingate-based 30s-wheelchair ergometer sprint (WAnT). METHODS:Able-bodied persons (N=19, 10 men, aged 18-26 y) performed a 15m overground sprint test in an instrumented wheelchair and a WAnT. 15m-outcomes were based on stopwatch time (time and mean velocity over 15m) and on PO (primary outcome: highest mean unilateral PO over successive 5s-intervals (P5-15m)). WAnT-outcomes were mean unilateral PO over 30s and the highest mean unilateral PO over successive 5s-intervals. Correlation coefficients (Pearson's r) and coefficients of determination (R(2)) were calculated between 15m-sprint outcomes and WAnT-outcomes. RESULTS:Time over 15m (7.2s (± 1.0)) was weakly related to WAnT-outcomes (r=-0.61 and -0.60, R(2)=0.38 and 0.36, p<0.01), similar to mean velocity over 15m (2.1 m·s(-1) (± 0.3), R(2)=0.43 and 0.39, p<0.01). P5-15m (38.1W (± 14.0)) showed a moderate relationship to WAnT-outcomes (r=0.77 and 0.75, R(2)=0.59 and 0.56, p<0.001). CONCLUSIONS:It seems that outcomes based on stopwatch time over a 15m-overground sprint cannot be used to assess wheelchair-specific anaerobic work capacity, in contrast to an outcome based on PO (P5-15m). The 15m-sprint with an instrumented wheel can be implemented in rehabilitation practice and research settings when WAnT equipment is not available, although care is needed when interpreting P5-15m as an outcome of anaerobic work capacity given that it seems more skill-dependent than the WAnT.
journal_name
Med Eng Physjournal_title
Medical engineering & physicsauthors
van der Scheer JW,de Groot S,Vegter RJ,Veeger DH,van der Woude LHdoi
10.1016/j.medengphy.2014.01.003subject
Has Abstractpub_date
2014-04-01 00:00:00pages
432-8issue
4eissn
1350-4533issn
1873-4030pii
S1350-4533(14)00004-6journal_volume
36pub_type
杂志文章abstract::The incudostapedial joint (ISJ) is a synovial joint connecting the incus and stapes in the middle ear. Mechanical properties of the ISJ directly affect sound transmission from the tympanic membrane to the cochlea. However, how ISJ properties change with frequency has not been investigated. In this paper, we report the...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2018.02.006
更新日期:2018-04-01 00:00:00
abstract::The femoral head in subjects with leg calve perthes disease (LCPD) is generally considerably deformed. It is debatable whether this deformation is due to an increase in applied loads, a decrease in bone mineral density or a change in containment of articular surfaces. The aim of this study was to determine the influen...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.10.015
更新日期:2017-02-01 00:00:00
abstract::The removal of the background from a noisy image to leave the object of interest, with well defined edges, is a difficult task. Images obtained using radioisotopes have low signal-to-noise ratios due to scattered photons, as well as emitted radiation from the background. Moreover, noise is, also, a consequence of the ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(95)00043-7
更新日期:1996-03-01 00:00:00
abstract::The acoustic power of high-intensity focused ultrasound (HIFU) is an important parameter that should be measured prior to each treatment to guarantee effective and safe outcomes. A new calibration technique was developed that involves estimating the pressure distribution, calculating the acoustic power using an underw...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2015.01.014
更新日期:2015-03-01 00:00:00
abstract::Lung cancer is the most common cause of cancer-related death, and early detection can reduce the mortality rate. Patients with lung nodules greater than 10 mm usually undergo a computed tomography (CT)-guided biopsy. However, aligning the needle with the target is difficult and the needle tends to deflect from a strai...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2017.04.009
更新日期:2017-07-01 00:00:00
abstract::The complexity, nonlinearity and nonstationarity of the cardiovascular system typically defy comprehensive and deterministic mathematical modeling, except from a statistical perspective. Living systems are governed by numerous, continuously changing, interacting variables in the presence of noise. Cardiovascular signa...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(01)00112-6
更新日期:2002-01-01 00:00:00
abstract::An ultrasonic aerosol generator constructed from a domestic humidifier is described which has been used to produce liquid aerosols for physiological investigations. The instrument was constructed from a Pifco domestic humidifier modified to include an energy guide to direct the oscillations of the transducer through t...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(95)97320-o
更新日期:1995-07-01 00:00:00
abstract::Right ventricle ejection fraction (RVEF) is clinically used to evaluate right ventricular function. The thermodilution method can be modified to estimate the RVEF. However, this method requires a thermistor with a fast time response in order to yield correct estimates. Digital signal processing techniques that were de...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(02)00026-7
更新日期:2002-06-01 00:00:00
abstract:BACKGROUND:An ideal prosthetic mesh for incisional hernia repair should mimic the anisotropic compliance of the abdominal wall, and at lower loads should exhibit higher distensibility without impairment of safety at higher loads. This study evaluated the biomechanical properties of six meshes in a rabbit model. METHOD...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2011.09.022
更新日期:2012-09-01 00:00:00
abstract::During fatiguing contractions, many adjustments in motor units behaviour occur: decrease in muscle fibre conduction velocity; increase in motor units synchronisation; modulation of motor units firing rate; increase in variability of motor units inter-spike interval. We simulated the influence of all these adjustments ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.09.022
更新日期:2016-12-01 00:00:00
abstract::Recent approaches to the in vitro experimental study of cardiac fluid mechanics involve the use of whole biological structures to investigate in the lab novel therapeutic approaches for the treatment of heart pathologies. To enhance reliability and repeatability, the influence of the actuation strategy of the experime...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.01.007
更新日期:2016-04-01 00:00:00
abstract::Failures of proximal femoral nails that treat unstable femoral fractures have been reported. In this communication, a finite element model to include a proximal femoral nail within a fractured femur was used to carry out preliminary investigations into configurations of single or double lag screws. The effects of the ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(00)00081-3
更新日期:2000-11-01 00:00:00
abstract::In contrast enhanced magnetic resonance imaging (MRI) and computed tomography (CT), the equilibrium distribution of anionic contrast agent is expected to reflect the fixed charged density (FCD) of articular cartilage. Diffusion is mainly responsible for the transport of contrast agents into cartilage. In osteoarthriti...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2010.06.002
更新日期:2010-10-01 00:00:00
abstract::Currently, the study of ion composition and performance in human biofluids plays an important role in biomedical engineering research and technology. This field may become universal for human diagnostics; it allows early detection of different diseases in humans by measuring changes in ion behaviour in human biofluids...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2011.04.007
更新日期:2011-11-01 00:00:00
abstract::The purpose of this study was to determine the use and feasibility of accelerometry-based monitoring and to examine a discrete multi-resolution signal analysis technique to determine motoric subtypes in patients with DSM-IV delirium. Forty consecutive patients receiving palliative care (23 male, 17 female, mean age+/-...
journal_title:Medical engineering & physics
pub_type: 临床试验,杂志文章
doi:10.1016/j.medengphy.2009.10.012
更新日期:2010-03-01 00:00:00
abstract:INTRODUCTION:A notable characteristic of bariatric surgery is the frequent manipulation of the bowel. The bowel is large, delicate, flexible, and has a natural lubricant on the tissue surface. Therefore the bowel is difficult to grasp and manipulate. Vacuum technique is commonly used in industry for all types of graspi...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2011.11.014
更新日期:2012-10-01 00:00:00
abstract::The aim of this study was to develop a technique for analyzing and visualizing the regional, three-dimensional signal intensity distribution of articular cartilage in MR images, as a potential surrogate marker of structural or biochemical alterations in early osteoarthritis. Exemplary MR-images of human patellae were ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(02)00006-1
更新日期:2002-04-01 00:00:00
abstract::To investigate the features of the gastric interdigestive pressure activity under normal physiological conditions, we have developed the wireless radiotelemetry capsule based on a telemetry technique. Twelve healthy volunteers participated in this study. Pressure activity data which are an important index of gastric m...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2008.04.017
更新日期:2009-04-01 00:00:00
abstract::Currently, a number of studies focus on the study and design of new healthcare technologies to improve elderly health and quality of life. Taking advantage of the popularity, portability, and inherent technology of smartphones, we present an emergency application for smartphones, designated as knock-to-panic (KTP). Th...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.05.002
更新日期:2016-09-01 00:00:00
abstract::The Fit4Purpose project aims to develop upper limb prosthetic devices which are suitable for deployment in lower- and middle-income countries (LMIC's). Open-frame trans-radial socket designs are being considered, formed of several, linked components, including pads which interface directly with the skin surface. A mec...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2020.08.003
更新日期:2020-10-01 00:00:00
abstract::In vivo bone behaviour predictions with respect to altered loading conditions, implants, and endoprostheses are highly desirable to avoid untoward effects such as implant loosening and breakage. This knowledge does not relate only to the result but also to the mechanisms of bone adaptation and bone growth. Since bone ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(94)90014-0
更新日期:1994-01-01 00:00:00
abstract::This study concerns the effects of different drilling parameters of pilot drills and twist drills on the temperature rise of alveolar bones during dental implant procedures. The drilling parameters studied here include the feed rate and rotation speed of the drill. The bone temperature distribution was analyzed throug...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2016.08.009
更新日期:2016-11-01 00:00:00
abstract::A three-layer artificial neural network was used for adaptive control of gait swing generated by neuromuscular electrical stimulation (NMES) in a spinal cord injured subject. Network inputs consisted of knee and ankle goniometer signals for System 1, and knee and hip angular data for System 2. Controller output was pr...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(96)00030-6
更新日期:1997-01-01 00:00:00
abstract::During reconstructive surgery of the face, one side may be used as a template for the other, exploiting assumed bilateral facial symmetry. The best method to calculate this plane, however, is debated. A new semi-automatic technique for calculating the symmetry plane of the facial skeleton is presented here that uses s...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2013.06.006
更新日期:2013-12-01 00:00:00
abstract::Segmentation of medical images is very important for clinical research and diagnosis, leading to a requirement for robust automatic methods. This paper reports on the combined use of a neural network (a multilayer perceptron, MLP) and active contour model ('snake') to segment structures in magnetic resonance (MR) imag...
journal_title:Medical engineering & physics
pub_type: 临床试验,杂志文章
doi:10.1016/s1350-4533(03)00137-1
更新日期:2004-01-01 00:00:00
abstract::Acetabular fractures potentially account for up to half of all pelvic fractures, while pelvic fractures potentially account for over one-tenth of all human bone fractures. This is the first biomechanical study to assess acetabular fracture fixation using plates versus cables in the presence of a total hip arthroplasty...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2017.06.004
更新日期:2017-08-01 00:00:00
abstract::A flow model utilizing an irrotational, inviscid algorithm of vortex-ring elements simulating the leaflets and source/sink elements simulating the aortic root coupled with a boundary layer model has been developed to model the internal flow phenomena of bi-leaflet mechanical heart valves implanted in the aortic root. ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/1350-4533(95)00075-5
更新日期:1996-09-01 00:00:00
abstract::A method aimed at the real-time monitoring of muscular fatigue was implemented and optimized. The method is based on an estimate of the complex covariance function in order to evaluate, in real time, the mean frequency of the myoelectric signal spectrum. Real-time implementation is guaranteed by a recursive computatio...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/s1350-4533(99)00049-1
更新日期:1999-05-01 00:00:00
abstract::We developed a device for an objective measurement of non-nutritive sucking (NNS). NNS is newborns' spontaneous action that is a predictor of their neural system development and can be adopted as an intervention to train oral feeding skills in preterms. Two miniaturized digital pressure sensors were embedded into a co...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2015.12.013
更新日期:2016-04-01 00:00:00
abstract::The concept of a monolithic Ti-Ni spinal rod with variable flexural stiffness is proposed to reduce the risks associated with spinal fusion. The variable stiffness is conferred to the rod using the Joule-heating local annealing technique. The annealing temperature and the mechanical properties' distributions resulted ...
journal_title:Medical engineering & physics
pub_type: 杂志文章
doi:10.1016/j.medengphy.2014.07.012
更新日期:2014-11-01 00:00:00