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M9550048.TXT
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1995-03-04
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Document 0048
DOCN M9550048
TI [Prevention of cross contamination, patient to anesthesia apparatus to
patient, using filters]
DT 9505
AU Cochs J; Casals P; Villalonga R; Vences A; Irujo J; Suarez M; Servicio
de Anestesiologia y Reanimacion, Ciudad Sanitaria y; Universitaria de
Bellvitge, L'Hospitalet de Llobregat, Barcelona.
SO Rev Esp Anestesiol Reanim. 1994 Nov-Dec;41(6):322-7. Unique Identifier :
AIDSLINE MED/95140922
AB Concern for cross infections from patient to patient via apparatus is
particularly relevant today. There are several ways to prevent patient
contamination through anesthetic devices. Although there is no clinical
evidence for using one alternative over another and each hospital
establishes its own hygienic protocols, we have introduced the
systematic use of filters with patients undergoing general anesthesia.
We describe the features of filters available on the market and our
protocol for their use. The efficacy of a filter depends on whether
bacteria or viruses are to be controlled. Filters can be classified into
three groups or generations based on mesh quality: 1) heat and humidity
exchangers (HHE), with large mesh screens that allow water to pass
through; 2) bacterial filters (FHHE), with finer mesh that is permeable
to droplets of water and 3) folded membrane filters (FHHE) that are
hydrophobic, with very fine mesh that stops water. We describe three
basic physical tests (passage of water, passage of smoke and increase of
resistance when applied to the patient) for filters to be classified.
The ideal filter is hydrophobic and does not increase circuit resistance
over the amount specified. Four principles are emphasized in the
protocol: 1) the filter forms a part of the patient, not the apparatus;
2) proper placement of the filter is between the patient and the
circuit's Y piece; 3) the main purpose of the filter is to prevent
contamination of the apparatus, and 4) if a hydrophobic filter is used
with each patient, the use of a disposable respiratory circuit is not
called for.
DE Adult Aerosols Anesthesia, General/*INSTRUMENTATION Child Cross
Infection/*PREVENTION & CONTROL Disinfection/ECONOMICS/METHODS English
Abstract *Equipment Contamination *Filtration/INSTRUMENTATION Gases
Hepatitis B/PREVENTION & CONTROL/TRANSMISSION Human HIV
Infections/PREVENTION & CONTROL/TRANSMISSION Intubation,
Intratracheal/INSTRUMENTATION Saliva/MICROBIOLOGY/VIROLOGY Smoke
*Ventilators, Mechanical Water JOURNAL ARTICLE REVIEW REVIEW,
TUTORIAL
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).