Presentation on theme: "Aseptic Technique and USP 797"— Presentation transcript:
1 Aseptic Technique and USP 797 DefinitionsAsepsis is the state of being free from the presence of pathogenic microorganisms.Sepsis is the state of being contaminated by pathogenic microorganismsSepticemia is the presence of microorganisms in the bloodSeptic shock is the condition of overwhelming infection of the blood by septicemia.Aseptic technique is the procedure used to maintain an aseptic environment in which to compound sterile products CSP’sAseptic technique strives to maintain surgical asepsis. (meaning complete sterility and lack of endotoxin )
2 USP 797 rulesUnited States Pharmacopeia 797 chapter on compounding of sterile products (CSP) was published in the 27th revision to USP on January 1st, 2004USP 797 is applicable to all facilities where compounded sterile products (CSP) are made, stored and sent to the patientUSP 797 applies to the aseptic technique used to make CSPs as well as the environment in which it is done (secondary engineering controls)
3 Microbial Risk Levels in USP 797 Low risk CSPMade under ISO5 conditionsInvolves aseptic transfer of manufacturer based sterile products using sterile equipment (i.e Needles and syringes) to compound IV admixtures.Does not involve open systems and no more than 3 componentsMedium Risk CSPSame as Low risk CSP but additionallyMore than three components are a part of the IV admixture (i.e TPN’s)CSP don’t contain antimicrobial preservative and product is given over more than 2 daysComplex preparation involvedHigh Risk CSPCompounding of manufactured ingredients that are non sterile and then performing terminal sterilizationPerforming compounding in condition outside ISO5
4 Risk Levels and Expiration Dating Low Risk CSPIn the absence of sterility testing48 hrs at room temperature14 days under refrigeration45 days frozen stateMedium Risk CSP30 hrs at room temperature7 days at refrigeration45 days at a frozen stateHigh Risk CSP24 hours at room temperature72 hours refrigerated45 days at a frozen state.
5 Hospital CompoundingFor the most part you may be preparing only low or medium risk CSP’sExample of a low risk CSPMaking a 50 ml SVP with 1 gram of vancomycin under ISO5 conditionsExample of a medium risk CSPCompound a triple mix TPN with additional additives of insulin, multiple vitamin injections, and other electrolytesExample of high risk CSPCompounding a sterile ophthalmic solution from a manufactured product that is not sterile and passing solution through a 0.22 micron filter several times
6 Air Quality and Cleanness ISO stands for international organization for standardizationISO was formed in 1947 in Geneva SwitzerlandProvides different levels of air quality cleannessISO 5 means no more than 100,000 particulates 0.1 micrometer or larger per cubic meter. By contrast, room air is classified as ISO9 which is no more than 1,000,000,000 particulates per cubic meter. (a ten thousand fold difference)
7 AnteroomUsually consists of a storage area, an area for records, computers and printers, an buffer area for gowningHas ISO class 8 standard (i.e 10X cleanner than normal room air)Has a sink equipped with surgical scrub soap (Chlorhexidine), and has handfree or pedal activated water systemsHas the following characteristics:Smooth walls with panels locked and sealedVinyl covered floor with seals heated togetherJoints and junctures between walls and ceilings must be chauked with no visible cracks.
8 Clean Room The room where the LAFW hoods are located Means same physical characteristics as anteroomNo sinks and floor drainsIf facility only compounds low and/or medium risk CSPs the clean and ante rooms need not be separated. Area immediately next to LAFW hoods is called buffer areaIf all risk levels are compounded clean and ante rooms must be separated.Must be maintained as a positive room air pressure environment if separated.
9 Maintaining of ante and Cleanrooms Cleaning requirementBSC or LAFW = beginning of shift, before each preparation, 30 minutes into the procedure, when surface is visible contaminatedCleaning of all floor surfaces daily from the buffer area outwards, from the clean room out to anteroom.Countertops: dailyCleaning and disinfection of all shelving surfaces at least monthlyWalls, Ceilings: monthlyDocumentation of such maintainedCleaning solvent required by USP for ISO5 and countertops:Isopropyl Alcohol USP 70%
10 Laminar Air Flow Hoods and Workbenchs LAFH and workbenchs are designed to blow parallel sheets of sterilized clean air over a work surfaceThe hood is usually washed and disinfected with 70% isopropranol by a pharmacist at the beginning and end of the shift. Washing is from top to bottom of the hood and back to front in the direction of laminar flow.HEPA filters remove over 99% of particles, including microorganism 0.3 microns or larger. When cleaning the HEPA filter grill do not spray the filter always spray the sterile gauze pads and clean the surface of the grillIf the HEPA Laminar flow hood is turn off for any reason then it must be turn on for at least 30 minutes before commencing any IV preparation.Horizontal Laminar Flow Hood: the HEPA filter is at the back of the hood and blows laminar air towards the operatorVertical Laminar Flow Hoods: the HEPA filter is on the top of the hood and laminar air flow sheets are blown to the work surface and not to the operatorAlso called a biological safety cabinetMust be recertified every 6 months
11 Biological Safety Cabinets Class I open system that draws air from the cleanroomClass II air is recirculated through vents in the front and back and passed though a HEPA filter on the top of the cabinet back down to the worksurfaces.Four types A, B1, B2, and B3Type A is not vented to the outsideType B1,B2,B3 all provide some or all exhaust to the facility’s external vent system.Class III are completely enclosed system under negative pressure which are vented. Manipulation by the operator are with a gloved apparatus through the front of the cabinet
12 Preparing to make an IV product Enter the cleanroom with slow and deliberate movement. Remove jewelry and tie back loose hair.Put on shoe coverings (booties) and then proceed to anteroom.In anteroom, perform antiseptic washing of hands which includes washing hands and washing between fingers as well as using fingernail buffer pad to clean under the fingernails. Wash hands up to the elbows and rinse hands first allowing water to drip down to elbows.Don surgical gown, hair cap, beard cover (if needed) and surgical mask if working with a hood with no front panel.Gather syringes, needles, IV bags (with cover removed)Perform second antiseptic handwash.Donn powder free surgical latex glovesEnter Buffer zonePlace all products into the laminar flow hood.
13 Remove all caps to vials Remove all caps to vials. Swab each vial with alcohol swab from back to front once with swab.Swab medication port of the IV bag that you will use.All products should be 6 inches inside the hood.Arrange materials in such as way as to not block any of the laminar flow air currents.Once inside the hood, your hands should not leave the inside of the hood. If they do you will need to sanitize your gloves before returning to the hood area.Always remember not to touch critical areas
14 The following are critical areas which must not be touched. All parts of the needle.The hub of a luer lok syringeThe ribs of the piston of the syringe.The injection port of the IV bag.The rubber entry port of the vial
15 Remember, touch is the number one cause of product contamination. Human skin harbors many organisms: Staphylococci, Streptococci, Actinobacter, Candida, Tricophyton Rubrum fungi, Pseudomonas, etc.Contaminated IV products can cause bacteremia and fungemia, septic shock and death.I will demonstrate aseptic technique in class with reference to drug manipulation.
16 The Finished productsIf you are a pharmacy technicians that will be performing IV admixtures. Always leave the following item for the RPH to check:All vials used in the processAll syringes used in the process drawn back to the volume you used.All information recorded in the IV prep log book: Patient’s name, medical record number, drugs, concentrations, volumes used, lot number and manufacturer’s expiration.Assigned a pharmacy expiration date (usually 24 hours at room temperature)
17 IV products continuedALL Intravenous products must be clear to the eye. Cloudiness or discoloration could indicate a physical or chemical incompatibility.Cloudiness indicates a drug has “come out” or precipitated out of solution. One example of this is mixing phenytoin sodium (Dilantin®) in D5W solution. A cloudy haze forms in the IV bag on standing.A second example is in TPN, addition of calcium gluconate in a solution of high phosphate can cause calcium phosphate to “come out” of solutionA third example is excessive shaking and agitation of a solution of mannitol. Mannitol’s needle like crystals can be seen after such agitation.
18 Common causes of physical and chemical incompatibilities are: A great reference to use to determine drug-drug, drug-IV solution compatibilities is a book called, Trissel’s Handbook on Injectable Drugs®Common causes of physical and chemical incompatibilities are:Drugs mixed in low pH solutions, like D5WDrugs mixed in hypertonic solutions, like D5WNSDrugs mixed in incorrect IV mediums. Such drugs are not compatibility in the PVC container of an IV bags; these drug are mixed in glass IV containers. A class example is nitroglycerin which is used for patients with acute MI.Drugs mixed with other drugs that “complex” each other.
19 Routes of IV administration As mentioned before, the most common routes of IV administration are IV push, Primary IV infusion, and IV piggyback.In IV push, the luer lok of a syringe is attached directly to the patient’s intravenous access and slowly “pushed” in by pressing on the syringe barrel. It may also by given through a Y site on a primary IV line with a fluid running IV solution.Primary IV infusion, the drug admixture is a large volume parenteral IV bag that is run through a dedicated IV line.In IV piggyback, the drug admixture is a small volume parenteral that is infusion through a secondary line into a primary one through a Y site connection.
20 Other Parenteral routes Epidural routes are IV catheters that are tunneled into a patient’s back near the spinal cord of the patient. Meant to deliver opiates and other pain medications to post op patients and obstetric patients. Solutions made for epidural use must be made from preservative free drug products.Intrathecal injections are made into the spinal cord. The needle passes through the dura mater into the subarachnoid space. This method is used to administer spinal opiates at doses far below regular IV doses. It is also used to deliver chemotherapy with methothexate and in the delivery of a drug called baclofen to patients with severe cerebral palsy.Some drugs given this way can be fatal. An example is the drug Vincristine.