#FOUR PRINCIPLES OF ASEPSIS FULL#
#FOUR PRINCIPLES OF ASEPSIS FREE#

Occasionally, you may stack a few items (eg IVPB’s), however they must be stacked from lower to higher starting from the back of the hood. Critical items should be placed as close to the air source as possible. In a horizontal hood, items should be placed no closer than 3 inches from the very back of the hood (nothing should touch the filter).

#FOUR PRINCIPLES OF ASEPSIS FULL#

Do not touch your hair, face or clothing.Įxcess dust should be removed from items before introducing them into the hood.Īrrange objects in a manner to get full benefit of the laminar flow of air. It is important that you keep your hands within the cleaned area of the hood as much as possible. Also, remove any jewelry from the hands and wrists. Wash hands and arms before compounding or re-entering the hood. All calculations should be done before entering the hood. Waste and other items should never enter the hood.

Poor manipulation of the syringe is the most frequent cause of contamination.Īlways minimize clutter. Also, when pulling back the plunger of a syringe, the fingers should not come in contact with any part of the plunger–except the flat part at the end. The hands should never obstruct airflow around the area where the needle enters the vial or ampoule. To best illustrate this very important point click on the two examples of proper aseptic technique: (manipulation of a vial and an ampoule). Air downstream from non-sterile objects (such as solution containers, hands etc.) becomes contaminated from particles blown off these objects. If turned off for any reason, it should be on for at least 30 minutes and thoroughly cleaned before reusing.Įxamples of vertical and horizontal laminar flow hoods:Īseptic technique: guidelines & key pointsĪ direct path must be maintained between the filter and the area inside the hood where the manipulations are being performed. Laminar hoods should remain on 24 hours a day. Limitations: With poor technique it is easy to overcome the established airflow velocity and introduce reverse currents that can re-introduce contaminants into the work area. (Have you ever viewed the air around you when you open the curtains on a sunny day?)… These contaminated particles may be present in the air for weeks. Example: Sneezing produces 100,000 – 200,000 aerosol droplets which can then attach to dust particles. The environmental control of air is of concern because room air may be highly contaminated. The HEPA filter removes nearly all of the bacteria from the air. The air is then compressed and channeled up behind and through the HEPA filter (High Efficiency Particulate Air filter) in a laminar flow fashion–that is the purified air flows out over the entire work surface in parallel lines at a uniform velocity.

Room air is taken into the unit and passed through a pre-filter to remove gross contaminants (lint, dust etc). The most important part of a laminar flow hood is a high efficiency bacteria-retentive filter. The air flowing out from the hood suspends and removes contaminants introduced into the work area by personnel. Provide a constant flow of air out of the work area to prevent room air from entering.ģ. An improperly prepared solution when administered can have very serious consequences: infections, emboli, occlusions and even………ġ. The IV route is the most dangerous route of administration because it bypasses all of the body’s natural barriers. Every precaution must be taken to avoid contamination. Patients who are receiving intravenous therapy tend to be the most critical. If a filter needle was required, it should also be present. Another example would be to require that all syringes be drawn back to the original amount of each individual dose and placed next to the admixture to facilitate checking by the pharmacist. This includes using the appropriate syringe size to measure out fluid volumes in order to minimize errors. c.) All compounding materials should be checked for expiration date, outer integrity, etc.Īccuracy: Guidelines must be set up to ensure the right drug, right dose, and right concentration. b.) The solution should be clear - all medications should be completely dissolved.

#FOUR PRINCIPLES OF ASEPSIS FREE#

Safety: a.) The finished product should be free of contamination (particles, bacteria, extraneous material). Number one rule: always think of the patient.Ī well thought out training program for aseptic technique should focus on safety and accuracy.

Four principles of asepsis