AST CST exam prep sterilization & disinfection only complete questions verified answers graded a+.

When using the warm cycle of the EtO sterilizer, what is the minimum sterilization temperature in Fahrenheit? - correct answer 85 degrees How many hours just an item submerse in Glutaraldehyde to sterilize? - correct answer 10 hours The Bowie-Duck test is performed: - correct answer Daily Which of the following is a method of high level disinfection? - correct answer 2% glutaraldehyde for 20 minutes The most reliable method of determining the efficiency of moist heat stabilizers is the controlled use of biological indicators containing the organism: - correct answer Bacillus stearothermophilus What degrees Celsius is the steam sterilization biological indicator incubated? - correct answer 55-60 degrees Celsius Which of the following method to removes small organic particles and soil from the box locks and ratchets of instrument? - correct answer Ultrasonic washer What is the proper method of preparing a Frazier section tip for steam sterilization? - correct answer Distilled water in the lumen The minimum Fahrenheit temperature for sterilization to occur in a prevacuum steam sterilizer is: - correct answer 270-276 Fahrenheit What is the minimum number of minutes to sterilize unwrapped metal instruments with lumens in the gravity displacement sterilizer at 270 Fahrenheit? - correct answer 10 minutes To prevent density, instrument sets should not exceed: - correct answer 25 pounds Which of the following is the most effective method for sterilizing item that can be damaged by steam sterilization? - correct answer Ethylene oxide When the surgical technologist is preparing surgical instruments for transport to the decontamination room, which statement is incorrect? - correct answer Instruments with multiple parts should be assembled Before transporting instruments to the decontamination room, what should the surgical technologist complete? - correct answer Presoak instruments in detergent solution Which solution is best for presoaking instruments in the OR at the end of a procedure? - correct answer enzyme The strips on steam chemical indicators change to what color upon exposure to sterilization parameters? - correct answer black What is the first step of opening a small, Sterile wrapped package when establishing the sterile field? - correct answer Open first flap away from self Which of the following microorganism is used within the biological indicator for the ethylene oxide sterilization? - correct answer Bacillus atrophaeus To prevent peel pack pouches from opening during sterilization, the surgical technologist should: - correct answer Force out air from pouch Which of the following statement is incorrect one double peel packing and items for sterilization? A. Inner peel pack is sterile B. Heavy items should be double peel packed C. Do not bend multiple items together. D. Inner peel pack is folded - correct answer Inner peel pack is folded The unsterile size of perimeter of a sterile wrap is: - correct answer 1 inch How many minutes are unwrapped instrument with no lumens sterilized at 270°F? - correct answer 3 minutes How long must an item be immersed in a Glutaraldehyde to be sterile? - correct answer 10 hours Which heat-resistant, spore-forming Bacillus does the steam sterilization biological indicator contain? - correct answer G. steaothermophilus The correct sterilization times required to render specific items sterile are initially established by the: - correct answer Equipment manufacturer In addition to temperature, time and moisture, what is the fourth factor that determines the outcome of the steam sterilization process? - correct answer pressure Which of the following sterilization processes is most economical? - correct answer steam How many hours is a steam biological indicator incubated - correct answer 24 hours Which of the following items should not be sterilized by dry heat? - correct answer Linen packs One of the most effective germicidals for cold sterilization is: - correct answer 2% glutaraldehyde During an EtO sterilization cycle, humidity is maintained at what? - correct answer 20-80% Which of the following is an intermediate level disinfectant? - correct answer isopropyl alcohol After the patient leaves the OR, the reusable items should be taken to the decontamination room: - correct answer Inside a closed case cart isopropyl alcohol is bactericidal, which means it: - correct answer kills bacteria What is required pressure for steam sterilizer set at the temperature of 250 Fahrenheit? - correct answer 15-17 A wrapped instruments set that will be run in the steam prevacuum sterilizer at 270° must be sterilized for a minimum of: - correct answer 4 minutes The gravity steam sterilization process can be rendered ineffective if the: - correct answer Temperature is below 250 degrees How often should biological testing of EtO sterilization be conducted? - correct answer every load Which of the following is a liquid chemical sterilant often used for sterilization endoscope with a cycle time of 30 minutes? - correct answer Peracetic acid How many minutes should the Frazier section tip be immediate-use sterilized (flash sterilized) in gravity steam sterilizer? - correct answer 10 minutes linen pack steam sterilized must not weigh more than - correct answer 12 lbs Which of the following statement concerning peel pack is correct? - correct answer When labeling with felt-tip marker write on the plastic side How many hours must the steam biological indicator be incubated before recording the result? - correct answer 24 hours Which of the following is responsible for causing transmission of spongiform encephalopathy? - correct answer prion When incubated, the EtO biological indicator can be read after: - correct answer 24 hours When using EtO sterilization, the recommended aeration time for an aerator set at 140 degrees F is: A. 8 hours B. 10 hours C. 12 hours D. 24 hours - correct answer 8 hours