Comparison of the effect of phthalaldehyde and glutaraldehyde on killing bacterial spores

Since o-phthalaldehyde (OPA) has been certified as a high-level disinfectant by the US Food and Drug Administration (FDA), it has been used for disinfection of endoscopes in foreign countries [1], and has been of great interest in China in recent years [~. In order to understand the ability of o-formaldehyde disinfectants to kill spores, we selected an imported o-formaldehyde disinfectant and a domestically produced strong glutaraldehyde disinfectant for comparison, and used a carrier-quantitative bactericidal assay to observe their efficacy in killing the spores of Bacillus subtilis black variant in the laboratory, and their stability in use. The results are reported below.

Discussion on the scheme of removing residual o-phthalaldehyde in endoscopy

Orthophthalaldehyde (OPA) has been widely used in recent years as a second-generation endoscopic disinfectant due to its low irritant odour and short disinfection time, and the current use rate of OPA is 45% in Japan and 41% in the United States [1]. However, o-phthalaldehyde has been banned for cystoscopy disinfection because of its allergenicity, and the residual OPA can damage the gastrointestinal mucosa of patients [2], leading to isopropyl alcohol shock reaction [3]. Although existing national and international guidelines on endoscopy emphasise the role of cleaning steps in the removal of disinfectant residues [4], there are no studies on the amount of OPA residues in actual endoscopes and the methods of effective removal. Therefore, the present study was conducted to verify the residual amount of OPA after different cleaning times and methods, with the aim of providing a theoretical basis for the development and application of clinical standards.

Observation on Application Effect of Multi-enzyme Cleaning Agent in Supply Room

[Abstract] Objective To study and analyze the application effect of multi-enzyme cleaning agent in the supply room. Methods From February 2016 to June 2016, 200 pieces of medical devices to be treated in the supply room of the Second People's Hospital of Shaanxi Province were selected as the research objects, and they were randomly divided into the control group and the experimental group, with 100 pieces in each group. The control group was cleaned with traditional cleaning agent, 1/200 configuration cleaning liquid, the experimental group was cleaned with multi-enzyme cleaning agent, 1/200 configuration, water temperature 25 ℃ ~ 30 ℃, the instrument shaft section was opened, the inner needle was removed, and soaked in the solution. Comparative analysis of experimental group and control group equipment visual inspection pass rate and Jieli test paper test pass rate. Results After the corresponding cleaning method, the number of unqualified pieces of visual inspection in the experimental group was 2 pieces, the number of qualified pieces was 98 pieces, and the qualified rate was 98.0 percent. In the control group, the number of unqualified visual inspection was 21, the number of qualified pieces was 79, and the qualified rate was 79.0%. The qualified rate of visual inspection in the control group was 79.0%, which was significantly lower than that of the experimental group, which was 98.0%. In the inspection of Jieli test paper, the number of qualified pieces in the experimental group was 97, and the number of unqualified pieces was 3, with a qualified rate of 97.0. In the control group, the number of qualified pieces was 75, the number of unqualified pieces was 25, the qualified rate was 75.0%, the difference between the two groups was statistically significant (P<0.05). Conclusion The application effect of multi-enzyme cleaning agent in the supply room is ideal, and the application of multi-enzyme cleaning agent can significantly improve the cleaning quality, easy to operate, and has the significance of clinical promotion.

Observation on the cleaning effect of multi-enzyme cleaning agent on oral instruments

To improve the cleaning method of multi-enzyme cleaning agent and improve the cleaning quality of oral cleaning instruments, 2,970 pieces of tooth extraction instruments with serious pollution were divided into 1 485 pieces in the test group and 1 485 pieces in the control group, and then divided into 3 groups with 495 pieces in each group, which were cleaned at 0 h, 1 h and 2 h after pollution respectively. The test group used 1:1 Multi-enzyme cleaning agent was heated to 25 ℃ and 40 ℃ with ultrasonic cleaning machine for 5 min. The control group was soaked with 1:1 multi-enzyme cleaning agent for 30 min. The two groups of tooth extraction instruments were taken out respectively and washed with flowing water. The residual occult blood detection method was used to detect the pilami hole, and the cleaning effect of each group was compared. Results The qualified rate of the test group and the control group which were cleaned immediately after pollution was 1%. The cleaning pass rate of the test group cleaned 1 h after contamination was 99-6%, and that of the control group was 97-0%, with a significant difference between the two (P <0-01). The clean pass rate of the test group cleaned 2 h after pollution was 99-0%, and the clean pass rate of the control group was 99-0%. 1%, there was a significant difference between the two (P <0.01). Conclusion For the heavily contaminated tooth extraction instruments, the effect of ultrasonic cleaning by heating 25 ℃ and 40 ℃ with multi-enzyme cleaning agent is remarkable.

What are the effects of storage time on the use of medical multi-enzyme cleaning fluids?

The multi-enzyme cleaning agent has good cleaning quality for the equipment, which is also based on the presence of enzymes, such as protease quickly decomposing protein stains, lipase quickly decomposing grease stains, and carbohydrase quickly decomposing carbohydrate stains.

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