医科器械学

The pressure gradients through surgical gowns and drapes which are casued by actual movement during surgical operation were studied. It became obvious that they are not higher than 10mm H_2O. Air permeabilities and filtration efficiencies of various fabrics wre examined at lower pressure gradients than 10mm H_2O. Some of nonwoven fabrics have both preperties of good air penetration and higher filtration efficiency. Standadized test methods are required to evaluate those materials in order to develop clinically effective and useful gowns and drapes.

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I have explained characteristics of spun-laced non-woven as a base material which is used for the medical disposables world-wide.Also, I have commented that technology of spun-laced non-woven is the key basic technology for developing next generation material for medical applicaiton area which becomes more speciallized and varsatile.This paper also contains new recomendation on direction and product development that non-woven as material for surgical disposable products should meet the demand.

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There is an gradual increased demand for medical nonwoven fabrics because of its high efficiency of bacteria barrier, the easiness of disposable and the handiness of supply steriled.However surgical gowns made of nonwoven fabrics are pointed out not being comofrtable enough to wear.In the results of the flexibility test, some of nonwoven fabrics showed flexibility nearly cotton materials.On the other hand, the bended test resulted in hardiness of cotton materials.Therefore flexibility is under the influence of stiffness, thickness, weight or direction, so total examination is necessary.In the results of the liquid penetration test under the condition of the quantity of liquid, nonwoven fabrics vary in penetration time acording to the methods or the processes of manufacture.It is important for nonwoven fabrics as material for surgical gowns to have a ggod flexibility and little liquid penetration in view of safety and function.

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Since 1986,when our new operating building was completed, to this date, the Central Operating Dept. has used only disposable linens.Based on our two years of clinical experience, the following is my opinion on "Medical Non-Wovens from the Economy Aspect."In comparing the conventional linen re-use system and the non-woven single use system, and the comparison should not only be made of numbers, and an accurate economic evaluation should be based on several points of view.The benefits obtained from the introduction of disposable linens may be classified as follow : 1. Effective utilization of hospital space.2. Control over infections.3. Labor-saving benefit.4. Rationalization benefit.5. Efficiency benefits (to nurse duties and operating room management).

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