摘要:

We present results from seven patients with closed mid-shaft tibial fractures and question the hypothesis that transverse wave response ratio analysis could be used to assess the progress of healing fractures. Mo correlation could be found between the response ratio and the post-fracture time as an indicator of bone fracture healing.

ISSN:0309-1902    

DOI:10.3109/03091909409030255

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

A composite material implant prosthesis for hip replacement has been developed. The design of the prosthesis substructure was based on investigation of the stress and strain fields that were developed in the human femur at the proximal end when a prosthesis stem had been inserted into it. The prosthesis stem structure was of unidirectional fibrous composite material core (graphite fibres in polysulfone matrix), wrapped with four layers of the same material but orientated at different angles. The orthotropic moduli of the outer layer are very close to the moduli of a human cortical bone in the vertical and circumferential directions. The moduli increased gradually from the outer layer to the inner core. A three-dimensional finite element model of the prosthesis and the bone has been constructed and loaded with the range of forces that might appear upon operation. The behaviour of the composite prosthesis and the femur was then compared with the intact femur and three other types of prosthesis materials, namely stainless steel, titanium, an isoelastic material and a hypothetical one with moduli identical to the cortical bone. The titanium has modulus of elasticity that is only half of the stainless steel. It was found that the composite prosthesis gave the best performance for most of the categories that were examined.

ISSN:0309-1902    

DOI:10.3109/03091909409030256

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

There are many tools to aid the clinician in making an accurate medical diagnosis including various imaging techniques and recording analogue signals from the patient. A new, inexpensive method of combining a video image and the instantaneous values of analogue waveforms is described here. The system, TVDATA, is reliable, compact and portable and has been successfully used in various clinical situations. The unit requires a standard video source, such as a camera, a TV monitor, a video recorder and the output from the analogue source or sources. The analogue data are converted into a digital signal and then displayed in a convenient part of the screen as a horizontal bar. Two types of data channel are available—uni-and bidirectional. A number of these channels can be used to record different analogue parameters and an inbuilt octal frame counter assists subsequent review of the video record.

ISSN:0309-1902    

DOI:10.3109/03091909409030257

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909409030258

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909409030259

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

摘要:

American National Standards: Cardiac Monitors, Heart Rate Meters, and AlarmsAssociation for the Advancement of Medical Instrumentation (AAMI), USA, 1993, pp. 44, US$59.00, ISBN 0910275033Ultrasonography in Obstetrics and GynecologyEdited by Z. C. Fleischer, R. Romero, F. A. Manning, P. Jeanty and A. Erevette James Jr. Prentice-Hall, 1992, pp. 668, US$115.00, ISBN 0 8385 7957 4.Monitoring in Anaesthesia and Intensive CareEdited by P. Hutton and C. Prys-Roberts, 1994,£70–00, pp. 496. Harcourt Brace and Company, London, ISBN: 0702014079.Biomechanics of the Musculo-Skeletal SystemEdited by B. M. Nigg and W. Herzog, 1994,£39.95, pp. 578. J. Wiley, Chichester, ISBN 0471 9 4444 0.

ISSN:0309-1902    

DOI:10.3109/03091909409030260

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909409030261

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor

ISSN:0309-1902    

DOI:10.3109/03091909409030262

出版商:Taylor&Francis    

年代:1994

数据来源: Taylor