Circuit model of medical equipment for electrical safety purposes

Nowadays, more than 10,000 different types of medical devices can be found in hospitals.These devices used in medical centers and hospitals for monitoring and treatment of patients require periodic safety and performance checking in order to have confidence in their functioning and operation. Physicians need better accurate medical measurements in order to better diagnose diseases, monitor patients and deliver treatments, in this way failure to ensure appropriate measurements will certainly have diverse effects. Safety and performance testing of medical devices in the medical sector is a one of the key factor in improving public health. Acquiring results of some investigations indicate a need for new and severe regulations on periodic performance verifications and medical equipment quality control program especially in highrisks instruments.The metrological reliability of four high risk medical devices, Electrosurgical unit, Defibrillator, Syringe pump and Infant incubator in use some hospitals (privates and publics) in one of the province of Iran according to international and national standards was evaluated. Quantitative analysis of Some parameters that impact the safety and performance showed the amount of the obtained results in some equipment are in critical range and have higher values than standard limitations. General electrical safety evaluations for measuring the patient leakage currents and patient auxiliary currents carried out for all of groups,in some cases the amount of leakage currents were over the standard limitations.Acquiring results indicate a need for new and severe regulations on periodic performance verifications and medical equipment quality control program especially in high risk instruments. It is also necessary provide training courses for operating staff in the field of meterology in medicine and what’s the critical parameters and how they can get good accuracy results equipment.

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Electrical Safety Testing of Medical Equipment in Japan

Journal of Clinical Engineering ◽

10.1097/00004669-199001000-00008 ◽

1990 ◽

Vol 15 (1) ◽

pp. 29-34 ◽

Cited By ~ 2

Author(s):

MASASHI EZAWA

Keyword(s):

Medical Equipment ◽

Electrical Safety ◽

Safety Testing

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A Comprehensive Framework for Post-market Electrical Safety Testing and Performance Assessment of Medical Equipment in Healthcare Facilities

IFMBE Proceedings - World Congress on Medical Physics and Biomedical Engineering, September 7 - 12, 2009, Munich, Germany ◽

10.1007/978-3-642-03885-3_194 ◽

2009 ◽

pp. 699-702

Author(s):

J. C. Langanke Pedroso ◽

S. J. Calil

Keyword(s):

Performance Assessment ◽

Medical Equipment ◽

Electrical Safety ◽

Safety Testing ◽

Healthcare Facilities ◽

Post Market ◽

And Performance ◽

Comprehensive Framework

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Biomedical Sensors

Handbook of Research on Biomedical Engineering Education and Advanced Bioengineering Learning ◽

10.4018/978-1-4666-0122-2.ch009 ◽

2013 ◽

pp. 356-436

Author(s):

Sverre Grimnes ◽

Jan Olav Høgetveit

Keyword(s):

Electrical Properties ◽

Medical Equipment ◽

Electrical Signal ◽

The Other ◽

Electrical Safety ◽

High Quality ◽

Biomedical Sensors ◽

Physiological Variables ◽

Technical Requirements

This chapter addresses biomedical sensors, which are important factors for the quality of measurement of biological and physiological variables, and thus deserve close attention both with respect to the medical functions and the technical requirements. There are special demands for biomedical sensors, particularly for invasive sensors that must pass sterilization by temperature or radiation at much higher levels than the rest of the medical equipment. On the other hand, miniaturization, mechanical strength, electrical safety, and sterility are important elements of the sensor design process. The sensor determines the accessibility, spatial resolution, accuracy, sensitivity, selectivity, and response time of the measurement. In order to convert the parameter of interest into an electrical signal suited for medical use, a transducing element is necessary. Knowledge of the complete chain of transducer materials, their electrical properties, and integration with bio-amplifiers are therefore necessary to design high-quality biomedical sensors.

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The Biomedical Engineer and the Doctor

Anaesthesia and Intensive Care ◽

10.1177/0310057x7500300108 ◽

1975 ◽

Vol 3 (1) ◽

pp. 48-49

Author(s):

Noel Cass

Keyword(s):

Solid State ◽

Patient Care ◽

Medical Equipment ◽

Electrical Safety ◽

The Past ◽

Proper Functioning ◽

Special Training ◽

Electronic Circuitry

The appearance of engineers with special training in biology has occurred only in the past fifteen years, and the spectacular contributions they can make to patient care have been confined mainly to the years since solid-state electronic circuitry became available. It is timely to review the relationships between them and the clinicians, and to indicate the growing interdependence they have on each other. The three points at which their interests converge most noticeably are: 1. in the collection, storage and display of data, 2. in the maintenance of electrical safety and the proper functioning of apparatus, and 3. in the design of electro-medical equipment.

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