ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

The performance of original manufacturer's electrodes and refurbished electrodes used by extra-corporeal shock-wave lithotripters were compared based upon their ability to erode uniform test stones. By having the stones erode rather than shatter, measurement of stone weight loss as a function of shocks could be obtained and compared. There were no significant differences in the mean erosion rates produced by eight original Dornier electrodes and eight refurbished electrodes (Lithotech*, Atlanta, GA). Functionally, the refurbished electrodes appear to be equivalent to the original electrodes. Measurements of test stone erosion rates also appear to offer a valid, indirect alternative to the measurement of peak pressures.

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

In Japan, the manufacture and sale of medical electrical equipment requires the permission and license of the Ministry of Health and Welfare. Electrical safety tests must be conducted at an official institution. This paper presents the statistical results of a series of 404 safety tests of medical devices, reports the electrical safety problems encountered, and suggests electrical design considerations for safety.

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Patient monitoring in Intensive Care Units (ICUs) requires the acquisition of a large amount of information and/or data. This information will be later analyzed and interpreted by clinical specialists. The task becomes particularly crucial when it involves intensive care units that incorporate a large number of beds. Most engineering efforts in the field have followed two different approaches: 1) Construction of systems and mechanisms for massive data acquisition, storage and processing of data, and appropriate display of the results; and 2) Building expert systems. This paper presents the basis for an alternative approach which combines deterministic and heuristic techniques. The approach also takes into account the possibility of reasoningunder uncertainty; one of the intrinsic characteristics of the clinical inferential processes.

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

Data compression of electrocardiograms (ECG) has become increasingly important because of the proliferation of computerized ECG processing systems. Data compression is useful for storage and transmission of digitized ECGs. In this paper, we describe a new ECG data compression algorithm called SAIES. It combines the advantages of the AZTEC and Fan compression techniques. We evaluated and compared the SAIES performance to that of the AZTEC and Fan algorithms, utilizing an independent database under identical test conditions. A 90% improvement in compression ratio over the Fan and more than 50% over the AZTEC are achieved. The signal fidelity of SAIES outperforms that of the AZTEC algorithm. This is based on visual inspection and computation of the rms error between the original and the reconstructed ECG signal.

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID

摘要:

A stimulation system has been built for application in clinical and laboratory environments. It has been designed to serve two individual functions. First, the system is used as a research tool in Functional Electrical Stimulation (FES). Second, the system functions as a rehabilitative assist device for individuals with spinal injuries. The stimulator uses multiple parallel processors in a master-slave configuration to support a multiple-channel, coordinated approach to Functional Electrical Stimulation. Each channel operates as a stand-alone stimulation unit under parametric control of a system master. The system master controls the slave channels operating from either resident programming or from instructions sent to it by a host computer (user interface). Waveform and stimulus parameters are all dynamically controlled. A first prototype has already been in clinical operation for six months and a second prototype is being designed. Results, while mostly qualitative, indicate that fatigue and pain can be lessened by iteratively tailoring waveforms to individual subjects.

ISSN:0363-8855    

出版商:OVID    

年代:1990

数据来源: OVID