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Objective To compare bacterial blocking rate of different medical packaging material,as well as weight loss rate,tear strength,and abrasion resistance of cotton cloth with different times of washing.Methods According to test methods for sterile medical device packaging,bacterial blocking rates of cotton cloth,non-woven fabric,and disposable filter paper were tested.Weight loss test,tensile test,and abrasion resistance test of cotton cloth were performed to test weight loss rate,tear strength,and abrasion resistance of cotton cloth with different times of washing.Results In test for microbial barrier ranking of porous package material,the average bacterial blocking rates of double-layer new cotton cloth,double-layer old cotton cloth,disposable filter paper,and nonwoven fabric were 62.15％,31.39％,82.04％,and 89.71％ respectively;after cotton cloth was washed 30 times,the weight loss rate decreased by 1.22％,tear strength decreased by 6.70％,fabric-rubbing test revealed there was no pilling.Conclusion Bacterial blocking effect ranked as follows:non-woven fabric,disposable filter paper,doublelayer cotton cloth.After 30 times of washing,the weight loss rate and tear strength decreased,and bacterial blocking effect was worse than that of new cotton cloth.
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Objective To compare the particle pollution to the solution in the ampoule wrapped and broken by non-woven fabrics and medical gauze.Methods Totally 200 pcs of sterile water for injection(2 ml/pc) were randomly divided into the experimental group and the control group,with 100 pcs for each.For the experimental group,the ampoules were wrapped and broken by disinfected non-woven fabrics.For the control group,the ampoules were wrapped and broken by medical gauze.The solution was sucked from the ampoule with a 10 ml syringe and injected into a measuring cup for testing.Results The quantity of particles in the solution in the experimental group was less than that in the control group,and the difference was statistically significant (P＜0.05).Conclusion Wrapping and breaking the ampoule by disinfected non-woven fabrics can reduce particle pollution to the solution,and this method is easy to practice.
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Objective: To explore the drying effect of pressure steam sterilization under different packing planes of non-woven fabrics so as to avoid the phenomenon of wet packages. Methods: 600 apparatus packages that packed by using non-woven fabrics were divided into A group(the packaging plane of apparatus bag used convex shape, that the center was higher and the periphery was lower), B group(The packaging plane of apparatus bag used horizontal shape) and C group (The packaging plane of apparatus bag used concave shape, that the center was lower and the periphery was higher)as random number table. All of the three groups adopted same package (the inner package was cotton and the outside package used non-woven fabrics of double-deck). Through pressure steam of impulse vacuum to achieve sterilization, and then the wet package rates of three groups were compared. Results: The wet package rates of the three groups were 1%, 8.5% and 37.5%, respectively, and the differences of wet package rates among the three groups were statistically significant (x2=10.135, P<0.05). Conclusion: The wet package rate of A group was lower than that of B group and C group, respectively. Therefore, this method of A group can ensure drying effect and guarantee the safety of clinical use.
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Introduction: Studies have highlighted the advantages and disadvantages of woven and non‑woven fabrics. The present study assessed the change in resterilisation proportion after introduction of non‑woven fabric for packaging of instruments and to evaluate the cost‑effectiveness of non‑woven fabrics compared with woven fabrics. Materials and Methods: The present study is a secondary data analysis of resterilisation data collected from November 2009 to August 2013. We calculated the proportions (and their 95% confidence intervals) of resterilisation done every month. The proportion over time was compared using a Chi‑square test for trend. We used linear regression analysis to adjust for the number of surgeries performed every month. We also compared the cost of woven and non‑woven fabrics. Results: Of the total 117,335 surgical packets prepared during the study period, 1900 were resterilised; thus, the overall proportion was 1.62% (95% CI: 1.55% to 1.69%). The resterilisation proportion was 8.95% (95% CI: 7.73% to 10.17%) in November 2009 and was 0.38% (95% CI: 0.16% to 0.62%) in August 2013 (P < 0.001). After adjusting for the total number of surgeries conducted every month, we found that the number of packets resterilised reduced every month (per month reduction: ‑ 1.97, 95% CI: ‑ 2.76 to ‑1.18). The total cost (initial preparation and resterilisation) for 100 units of woven fabric is INR 6359.41 per month (confidence limit estimates: 6228.20 to 6430.62) and for non‑woven fabric was INR 6208.50 (confidence limit estimate: INR 6194.90 to 6223.35) (P < 0.01). Conclusions: The introduction of non‑woven spunbond‑meltblown‑spunbond fabrics did reduce the proportion of resterilisation of packaged instruments. The decline was sharp and sustained over time, even after accounting for the change in the number of procedures. Furthermore, though the switch from woven to non‑woven fabric was cost‑effective in our situation, it may not be directly translated to other scenarios.