Medical Engineering & Physics Journal Impact Factor & Information

Publisher: Institute of Physics and Engineering in Medicine (Great Britain), Elsevier

Journal description

Medical Engineering & Physics provides a forum for the publication of the latest developments in biomedical engineering, and reflects the essential multidisciplinary nature of the subject. The journal publishes in-depth critical reviews, scientific papers and communications of work which is at an earlier stage of development. Topics covered include clinical engineering, biomedical computing, biological systems, instrumentation, medical imaging technology, biomaterials, biomechanics and rehabilitation. Medical Engineering & Physics keeps both medical engineers and clinicians abreast of the latest applications of technology to health care.Months of publication: February, March, May, June, August, September, November, December.Index bound in last issue of calendar year.

Current impact factor: 1.83

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 1.825
2013 Impact Factor 1.839
2012 Impact Factor 1.779
2011 Impact Factor 1.623
2010 Impact Factor 1.906
2009 Impact Factor 1.674
2008 Impact Factor 2.216
2007 Impact Factor 1.471
2006 Impact Factor 1.179
2005 Impact Factor 1.151
2004 Impact Factor 1.109
2003 Impact Factor 0.949
2002 Impact Factor 0.769
2001 Impact Factor 0.604
2000 Impact Factor 0.497
1999 Impact Factor 0.436
1998 Impact Factor 0.447
1997 Impact Factor 0.486

Impact factor over time

Impact factor

Additional details

5-year impact 2.22
Cited half-life 6.60
Immediacy index 0.27
Eigenfactor 0.01
Article influence 0.63
Website Medical Engineering & Physics website
Other titles Medical engineering & physics (Online), Medical engineering and physics
ISSN 1350-4533
OCLC 39061713
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publisher details


  • Pre-print
    • Author can archive a pre-print version
  • Post-print
    • Author can archive a post-print version
  • Conditions
    • Authors pre-print on any website, including arXiv and RePEC
    • Author's post-print on author's personal website immediately
    • Author's post-print on open access repository after an embargo period of between 12 months and 48 months
    • Permitted deposit due to Funding Body, Institutional and Governmental policy or mandate, may be required to comply with embargo periods of 12 months to 48 months
    • Author's post-print may be used to update arXiv and RepEC
    • Publisher's version/PDF cannot be used
    • Must link to publisher version with DOI
    • Author's post-print must be released with a Creative Commons Attribution Non-Commercial No Derivatives License
    • Publisher last reviewed on 03/06/2015
  • Classification

Publications in this journal

  • [Show abstract] [Hide abstract]
    ABSTRACT: A portable, lightweight home ankle exerciser was designed and built by the Biomedical Engineering Department of University Hospital in London, Ontario, Canada. The ankle exerciser incorporates several unique features that overcomes the drawbacks of exercise equipment presently available. For optimal muscle strengthening, the resistance offered by the device matches the strength curve of the ankle muscles. The magnitude of the resistance can be widely varied to accommodate any subject. Resistance is generated by a slip clutch rather than by springs or weights which can be cumbersome and potentially dangerous. One of the considerations in the design of the ankle exerciser was to monitor subject compliance with the exercise regimen. This is accomplished with a battery-operated monitoring unit mounted on the device. The exerciser is instrumented with a battery-powered torque transducer and digital display unit that enables the subject and assessor to monitor the exercise resistance level at a glance.
    Medical Engineering & Physics 07/1996; 18(4):314-9. DOI:10.1016/1350-4533(95)00057-7
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    ABSTRACT: A new arterial wall permeability function, based on the local wall shear stress gradient, has been developed and employed to simulate enhanced low density lipoprotein transfer across the endothelium. the atherosclerotic model used is that of the aorto-celiac junction of rabbits. The experimentally validated computer simulation model for convection mass transfer provides further evidence that the wall shear stress gradient is a reliable predictor of critical atherogenic sites in branching arteries. Some of the underlying biological aspects of atherogenesis due to locally significant and sustained wall shear stress gradient values are briefly discussed.
    Medical Engineering & Physics 07/1996; 18(4):326-32. DOI:10.1016/1350-4533(95)00045-3
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    ABSTRACT: A pulsatile impeller total heart was developed, which consists of two impeller pumps and a d.c. motor. As the motor changes its rotating speed periodically, both pumps eject the blood flow simultaneously. To evaluate its blood compatibility, the device and sarns roller pumps were compared in two series of acute biventricular assist experiments in four and three pigs, respectively. The experimental conditions were controlled to be as equal as possible. The experiments lasted 6 hours. Blood sampling was drawn preoperatively, at the beginning of the pumping and every 2 h postoperatively. Red blood cells (RBC), white blood cells (WBC), platelets (PLT), hematocrit (HCT), hemoglobin (HB), free hemoglobin (FHB) and lactate dehydrogenase (LDH) were measured. The results demonstrated that there was no significant blood damage caused by impeller total heart and the clinically used roller, and that the pulsatile impeller total heart is suitable for chronic animal experiments.
    Medical Engineering & Physics 07/1996; 18(4):320-5. DOI:10.1016/1350-4533(95)00050-X
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    ABSTRACT: Analysis of three-dimensional velocity profiles and wall shear stress distribution in a segment of an artery reconstructed from in vivo imaging data are presented in this study. Cross-sectional images of a segment of the abdominal aorta in dogs were obtained using intravascular ultrasound (IVUS) imaging employing a constant pull back technique. Simultaneous measurement of pressures distal and proximal to the vessel segment along with gated pulsed Doppler velocity measurements were also obtained. The three-dimensional geometry of the vascular segment was reconstructed from the IVUS images during peak forward flow phase, and a computational mesh was constructed from the data. A quasi-steady analysis of incompressible Newtonian fluid was performed with a finite difference general purpose computational analysis program FLOW3D. The velocity at the inlet and pressure at the outlet measured at the corresponding time (time referenced to ECG) were used to specify the boundary conditions for the computational flow model. The computed results compared favorably with previously reported results. The purpose of the present study was to analyze the hemodynamics in vascular segments from morphologically realistic three-dimensional reconstructions. The method can be potentially employed in analyzing the hemodynamics in the region of atherosclerotic plaques at various stages of development and the reactivity of the vessel in response to pharmacological and mechanical interventions.
    Medical Engineering & Physics 07/1996; 18(4):295-304. DOI:10.1016/1350-4533(95)00053-4
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    ABSTRACT: This experimental study examines the relative influence of five unilateral external fixators on tibial fracture stability during simulated walking. Stability during routine patient activity is important, because cyclic inter fragmentary motion, or strain, has been shown to affect fracture healing. In model stable fractures simulating early healing (six weeks), it was found that fixators do little to constrain against axial inter fragmentary strains as great as 100% at only nominal weight-bearing (6.0 kg). These strains may occur repeatably at peak amplitudes of motion during walking. Similarly, peak angular movements may lead to additional axial strains of up to 25% at the external cortex and shear movements may lead to shear strains of up to 100%. Such strains are great enough to yield and possibly refracture the intra gap fracture tissue that may be composed of a combination of granulation tissue, fibrous cartilage, cartilage and bone. It was also shown that the procedure of releasing the fixator column to telescope (dynamize) has little influence on peak cyclic axial motion and on loading at the fracture, although increases occurred in peak transverse and torsional shear strains of up to 100%. Since permanent inter fragmentary translation also arises from the consequent compaction of the intra gap tissue, it may be permanent displacement rather than any change in the amplitude of motion that is responsible for the beneficial effect on healing claimed for the dynamizing procedure. In unstable fractures that are unable to support tibial load at the fracture, the peak amplitudes of cyclic movement were as great as those reported for fractures stabilized by plaster casts, and were approximately twice the movement of the stable fractures simulating early healing. Therefore, patients with unstable fractures supported by external fixators, may be expected to have similar patterns of healing to plaster-casted patients with similar fractures.
    Medical Engineering & Physics 07/1996; 18(4):305-13. DOI:10.1016/1350-4533(95)00056-9
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    ABSTRACT: A significant majority of cervical spine biomechanics studies has applied the external loading in the form of compressive force vectors. In contrast, there is a paucity of data on the tensile loading of the neck structure. These data are important as the human neck not only resists compression but also has to withstand distraction due to factors such as the anatomical characteristics and loading asymmetry. Furthermore, evidence exists implicating tensile stresses to be a mechanism of cervical spinal cord injury. Recent advancements in vehicular restraint systems such as air bags may induce tension to the neck in adverse circumstances. Consequently, this study was designed to develop experimental methodologies to determine the biomechanics of the human cervical spinal structures under distractive forces. A part-to-whole approach was used in the study. Four experimental models from 15 unembalmed human cadavers were used to demonstrate the feasibility of the methodology. Structures included isolated cervical spinal cords, intervertebral disc units, skull to T3 preparations, and intact unembalmed human cadavers. Axial tensile forces were applied, and the failure load and distraction were recorded. Stiffness and energy absorbing characteristics were computed. Maximum forces for the spinal cord specimens were the lowest (278 N +/- 90). The forces increased for the intervertebral disc (569 N +/- 54). skull to T3 (1555 N +/- 459), and intact human cadaver (3373 N +/- 464) preparations, indicating the load-carrying capacities when additional components are included to the experimental model. The experimental methodologies outlined in the present study provide a basis for further investigation into the mechanism of injury and the clinical applicability of biomechanical parameters.
    Medical Engineering & Physics 07/1996; 18(4):289-94. DOI:10.1016/1350-4533(95)00054-2
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    ABSTRACT: Although providing an historical overview of the development and clinical applications of conduit-mounted prosthetic heart valves, with elementary explanations of operative techniques, this review concentrates on the impact of design and surgical considerations on their in vivo performance. Areas showing potential for design improvement of mechanical prostheses are highlighted, both in terms of haemodynamic efficiency and haemocompatibility. Comparisons are drawn throughout the paper with conventional valve prostheses, and the key features where they differ significantly are pointed out. It is concluded that there is considerable scope for further worthwhile development.
    Medical Engineering & Physics 07/1996; 18(4):263-72. DOI:10.1016/1350-4533(95)00051-8

  • Medical Engineering & Physics 07/1996; 18(4):333-8. DOI:10.1016/1350-4533(95)00048-8
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    ABSTRACT: An interactive computer model is described which uses 'blood volume deficit' and 'bleeding duration' together with rates of infusion to simulate the first two hours of haemorrhage. It allows multiple infusions of various fluids to be specified and includes an estimation of the volumes added by the transcapillary refill mechanism. The output is expressed graphically in terms of blood pressure and haematocrit at intervals of one minute. This computer model has proved useful for assessing the effects of a range of variables in hypovolaemic shock. It has considerable potential for investigating the relative efficacy of various clinical protocols and could provide an alternative to animal experimentation which has so far been the primary method of obtaining data on acute haemorrhage. It is also a useful teaching aid.
    Medical Engineering & Physics 07/1996; 18(4):339-43. DOI:10.1016/1350-4533(95)00044-5
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    ABSTRACT: Achieving appropriate integration of control of multiple assistance devices for an individual is currently limited by available integrated systems. An overview of the provision process for Rehabilitation Integrated Systems (RIS) is presented which stresses the need for detailed assessment of the individual's abilities and requirements. A software system is described which integrates existing assistive applications on a PC in an attempt to provide a flexible RIS which can be tailored more precisely to an individual. This has required the use of both DOS and Windows applications and highlighted problems due to limitations of existing RISs, despite user requirements being taken fully into account. While Windows offers the opportunity to remove some compatibility problems, it is concluded that interfacing standards for both software and hardware are necessary to overcome the problems this approach engenders. For individuals who have to use 'intrinsically slow' user interfaces, it is identified that (i) the availability of quantitative comparisons of efficiency of selection methods and (ii) increased choice of selection methods is important.
    Medical Engineering & Physics 05/1996; 18(3):187-92. DOI:10.1016/1350-4533(95)00069-0
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    ABSTRACT: The pressure pulse contour analysis method uses a third-order lumped model to evaluate the elastic properties of the arterial system and their modifications with adaptive responses or disease. A fundamental assumption underlying this method is that the estimates of model parameters (two compliances, an inertance, and a peripheral resistance) obtained from a measurement of cardiac output, and a simultaneous measurement of an arterial pressure, are independent of the pressure measurement site. If true, this hypothesis would provide a minimally invasive method for estimation of arterial compliance. The aim of the present study was to test the validity of this assumption and the ability of the method to assess changes of compliance in response to vasoactive drug administration. In five anaesthetised, open-chest dogs we measured pulsatile pressure and flow in the ascending aorta and pulsatile pressure in the terminal aorta, under basal, vasoconstricted (methoxamine), and vasodilated (sodium nitroprusside) conditions. Model peripheral resistance was assumed equal to the ratio of mean pressure to cardiac output. Estimates of inertance and compliances, and the associated estimation errors, were determined by fitting the model output to either the diastolic portions of ascending aortic pressure, P(adt), or terminal aortic pressure, Ptd(t). Results showed that the assumption of independency of model parameter estimates on the arterial pressure measurement site was not verified. Different images of the vasoactive drug-induced changes in vascular compliance were obtained from fits to P(adt) and Ptd(t). Model parameter estimates were associated with high estimation errors and were very sensitive to the choice of the period of diastolic pressure to be fitted. Model predicted aortic pressure, over the entire heart cycle, did not compare well with experimental ascending aortic pressure. Our results question the reliability of the pressure pulse contour analysis method for evaluating arterial compliance.
    Medical Engineering & Physics 05/1996; 18(3):225-33. DOI:10.1016/1350-4533(95)00042-9
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    ABSTRACT: This paper gives a review of the current and anticipated developments in Integrated Home Systems and raises the implications these have in the field of rehabilitation. Firstly, the systems under consideration are defined and their development world-wide outlined. An overview of the European Home Systems Specification is given. The implications of this technology for rehabilitation are then raised considering: environmental control in the home; how people with degenerative conditions may be more readily able to remain in their homes as condition progresses; and remote health monitoring. The expectation that the initial impact will be in the area of environment control is stated, and a closer look at this field is made comparing current with anticipated systems. An outline is given of the TIDE Project HS-ADEPT (Home Systems--Access for Disabled and Elderly People to this Technology). The key findings of the survey of users made at the outset of the project, relevant to this paper, are given. The ongoing work of the project is described in brief. The continuing developments in Integrated Home Systems and in particular the issue of standards are noted. Concluding comments are offered in the hope of stimulating the necessary interdisciplinary discussion if this technology is to realize its full potential in the field of rehabilitation.
    Medical Engineering & Physics 05/1996; 18(3):176-80. DOI:10.1016/1350-4533(95)00071-2
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    ABSTRACT: This paper details the development of two systems Switch Access to Windows (SAW) and Communicator Specification (Comspec). Descriptions are given of the two systems and their development methodologies. Convergence of approach both in the designer and user interfaces as well as the development methodologies arose naturally in the course of development despite starting with what seemed to be very different aims. SAW addresses a particular form of communication, that between a switch user and computer applications. Comspec will, as a comprehensive and expandable communication system, subsume SAW in the long run.
    Medical Engineering & Physics 05/1996; 18(3):181-6. DOI:10.1016/1350-4533(95)00070-4
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    ABSTRACT: Hip joint simulators were developed for predicting, by attempting to duplicate in vitro physiological loads and motion, the wear rate that total hip replacements are likely to show in vivo. From a theoretical point of view, loading and motion cycles of hip joints could be closely reproduced by three rotation actuators and three force actuators. However existing devices have been designed assuming that some of these degrees of freedom are negligible, in order to reduce the complexity of the equipment. The present study singles out some preliminary indications on the design choices regarding the spatial configuration of loading and motion actuators. The aim is to define theoretically a simplified simulator but still able to apply the most physiologically realistic loading cycle to the specimen.
    Medical Engineering & Physics 05/1996; 18(3):234-40. DOI:10.1016/1350-4533(95)00026-7
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    ABSTRACT: Many people with multiple impairments need to use a powered wheelchair, voice output communication aid, environmental control, and access information technology. Integrating and mounting such assistive devices on a powered wheelchair can be time-consuming, expensive and result in compromised performance. This paper offers a concept of assistive device integration, based around a continuum ranging from wholly discrete systems to fully integrated systems. Using practical examples, advantages and disadvantages of different approaches to integration along this continuum are identified, particularly with regard to control characteristics of different types of assistive technology. Limitations of current practices and technologies are discussed and measures suggested to enable systems to achieve better integration.
    Medical Engineering & Physics 05/1996; 18(3):193-202. DOI:10.1016/1350-4533(95)00068-2
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    ABSTRACT: Current intensive care ventilator-humidifier systems neither monitor nor adequately control inspired gas humidity. Problems of low delivered humidity and condensation within ventilator circuitry are commonly encountered. To help to address these problems, a numerical model of a complete ventilator-humidifier-patient intensive care system has been developed. The model, based on a finite difference technique, can predict pressures, flow-rates, temperatures and relative humidities at discrete points throughout the system. A comparison of numerical predictions and measurements in a real system is reported. A strong qualitative agreement is demonstrated in all cases studied, and a good quantitative agreement is obtained in most cases. It is concluded that such models could be used to assess methods of controlling ventilator-humidifier systems to prevent the occurrence of condensation. Similar models could be developed for other medical gas delivery systems.
    Medical Engineering & Physics 05/1996; 18(3):251-61. DOI:10.1016/1350-4533(95)00040-2
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    ABSTRACT: The frictional action at stump/socket interface is discussed by a simplified model and finite element model analyses and clinical pressure measurements. The friction applied to the stump skin produces stresses within tissue and these stresses may damage the tissues and affect their normal functions. The combination of normal and shear stresses is considered to be a critical factor leading to amputee's discomfort and tissue damage. However, friction at the stump/socket interface has a beneficial action. A simplified residual limb model and a finite element model using real geometry have been developed to analyse the support action of friction. Both results show that the friction plays a critical role both in supporting the load of the amputee's body during the support phase of the gait cycle and in preventing the prosthesis from slipping off the limb during swing phase. Pressure at the below-knee socket during walking were measured with conditions of different friction. The results reveal that a larger pressures was produced at the lubricated interface than at the normal interface. A proper choice of coefficient of friction will balance the requirements of relief of load stress and reduction of slip with the general ability to support loads.
    Medical Engineering & Physics 05/1996; 18(3):207-14. DOI:10.1016/1350-4533(95)00038-0
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    B Allen ·
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    ABSTRACT: It is now commonly accepted that 'Smart House' technology can play a significant part in helping both elderly and disabled people enjoy a greater degree of independence in the near future. In order to realize this aspiration, it is necessary to examine a number of factors: the development of the appropriate Home Bus technologies and supported devices; the development of the appropriate user interfaces that will allow people with a range of special needs use the system; the incorporation of the requirements of the 'Smart House' controller with the other technological needs of the user; and the development of mainstream technologies that will affect the cost and availability of devices to the user. This paper will examine the above points and suggest appropriate actions and trends. It will draw upon the work of a four-member consortium currently finalizing a technical development project under the EC TIDE program, the experience of research and commercial organizations engaged in development work in associated areas and the experiences of the Dublin-based, Central Remedial Clinic and in particular, its Client Technical Services Unit. The CTSU have been actively engaged in the development of systems for clients and direct clinical assessments for the last 12 years.
    Medical Engineering & Physics 05/1996; 18(3):203-6. DOI:10.1016/1350-4533(95)00074-7