This set of Clinical Science Multiple Choice Questions & Answers (MCQs) focuses on “CSSD”.
1. What is the purpose of CSSD?
a) storage of clean equipment
b) providing sterile equipment to the operation theater
c) storing sterile equipment
d) pharmacy of the operation theater
Explanation: CSSD stands for Central Sterile & Supply Department. All the equipment that is used in the hospital, especially surgeries, is kept in this store. The area is responsible for disinfecting all the equipment and preparing it for use again and keeping the disinfected instruments in a sterile environment.
2. Which machine uses the temperature and pressure of the steam for disinfection?
a) Laminar Airflow
d) Water Jet
Explanation: An autoclave produces steam at high temperature and maintains great pressure to destroy the microbes. The autoclave does heat and steam treatment of the instruments at 134℃ for three minutes or at 121℃ for fifteen minutes. This high pressure and high heat treatment help destroy a number of microbes.
3. Which of the following cannot be autoclaved?
Explanation: Catheter is a soft instrument, made of polymers rather than any metallic substance. The high heat and water pressure of the autoclave can cause the polymer to melt or get damaged. Thus, it undergoes chemical treatment.
4. Which of the following chemicals are used to treat the instruments made out of polymers?
i). Ethylene Oxide ii). Hydrochloric Acid iii). Silver Cyanide iv). Ozone v). Bleach vi). Saline Solution vii). Sulphuric Acid viii). Glutaraldehyde and Formaldehyde ix). Phthalaldehyde x). Hydrogen Peroxide xi). Nitric Acid xii). Peracetic Acid xiii). Silver xiv). Formic Acid xv). Citric Acid
a) i, ii, iii, iv, v, vi
b) ii, iv, vi, viii, x, xii
c) i, iv, v, viii, ix, x, xii, xiii
d) iii, iv, ix, xii, xv
Explanation: Instruments made out of polymers cannot be treated with high heat or pressure like autoclaves because it can cause the instrument to be damaged. Thus, they are treated with chemicals. These chemicals need to be strong enough to destroy the microorganisms but should not be corrosive or else they will destroy the instrument.
5. How are the gauze and cotton sterilized?
a) Hot air sterilization
b) Wet Heat Sterilization
c) Sterilization Under High Pressure
d) Chemical Sterilization
Explanation: Gauze and cotton are cloth materials which have their own pores. Using moist sterilization will cause them to become wet and they may not dry out. Chemical sterilization also poses the same problem, the chemicals may stay back and adhere to the gauze and cotton. For sterilization under pressure, again moisture is required. Thus, hot air sterilization is used. Hot air at high temperature and pressure is blown and the gauze and cotton are sterilized.
6. What machine is used to package the cotton and gauze?
a) Heat Sealing Machine
b) UV sealing Machine
c) Zip Lock Machine
d) Needle and Thread Sealing
Explanation: The gauze and cotton are placed in special pouches which have been sealed from three sides before hand. After the gauze or the cotton has been placed, the fourth side, which is open is placed in between the heat sealing tubes and the pouch is sealed.
7. What is sterilized in dry conditions?
Explanation: A gauze is like a bandage that is used to wrap up an injury. Since it is made of cloth, it cannot undergo wet sterilization as it may not dry out and become a site of infections. Thus, it is sterilized in dry conditions like in an oven or a microwave or some other heat therapy.
8. How is dry sterilization done?
a) In autoclave
b) In oven
c) In Magnetic Vibrator
d) In Hot Plate
Explanation: The oven is a specialized device that helps in dry sterilization with the help of heat. It may also use some gases at times to sterilize the object. Dry Air sterilization is also done. Other devices for dry sterilization are microwaves, hot air sterilization, desiccators etc.
Sanfoundry Global Education & Learning Series – Clinical Science.
To practice all areas of Clinical Science, here is complete set of 1000+ Multiple Choice Questions and Answers.