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Abstract

COMPARATIVE STUDY OF THE AIR HANDLING SYSTEM BY FILTRATION AND HYDRO-PHOTO-IONIZATION IN HOSPITAL STERILIZATION SERVICES

I. El Assaad-Idrissi, S. Makram, Y. Bensouda, Y. Cherrah, S. Derraji*

ABSTRACT

Introduction: aerobiocontamination in a hospital sterilization service is a major risk for the sterilization quality of reusable medical devices. The objective of our work is to study two air treatment processes, the first by the particle separation system by filtration, the second by the particle destruction system Photo-Hydro-Ionization (PHI) the Central Sterile Service of HMIMV-Rabat and to review the performance of both systems. Materials and methods: For each area of the Central Sterile Service, samples of air particle counter and aero bio compactor (on Sabouraud culture media and TSA), are made with only the operation of the air handling system by filtration and with the simultaneous operation of the latter with Photo-Hydro-Ionization system thereof, in human absence. Results: The particle count results in the washing area of the CSSD for particles ≥ 0,3μm; ≥ 0.5 μm; ≥ 1,0μm; ≥ 5,0μm are respectively: 18319993 particles;1713941.89 particles; 173,123.889 particles; 804particles. For the conditioning zone are : 8726717.4particles;1146271.27 particles; 147821.933 particles; 661.07 particles. For the sterile area are: 7458377.67 particles; 739135.333 particles; 104071.75 particles; 1629.91667 particles. For the results of aerobiocontamination are respectively: 4 CFU, 6 CFU, 23UFC. Discussion: Of 49 samples taken with Photo- Hydro-Ionization treatment, the level of particulate contamination and aerobiocontamination improved significantly, the results of the particle decontamination kinetics are inconclusive. Conclusion: In a study of Photo-Hydro-Ionization system alone without the simultaneous use of the system of air filtration treatment would be desirable for an objective evaluation of the added value of this new treatment system.

Keywords: Aerobiocontamination; Air treatment; Medical-device; central sterilization.


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