More Control Methods

Question 1

Free-flow Steam (100C) is not hot enough to sterilize. What does an autoclave do that enables steam to sterilize

Answer 1

Pressurizes steam, increasing temperature

Question 2

15 PSI above atmospheric pressure (14.7) increases the temperature of steam to what?

Answer 2

121.5 C

Question 3

Autoclaves pressurize steam to around 30 PSI increasing the temperature to 121.5 C. How long does it take to sterilize under these conditions?

Answer 3

10-12 min with a 3 min safety margin

Question 4

Steam penetrates and corrodes anything it comes in contact with. What does this mean for surgical instruments?

Answer 4

Dulls scissors and scalpel blades (NoT gOoD)

Question 5

Two ways an autoclave removes air

Answer 5

Gravity displacement
High-vacuum

Question 6

Why is it important to not overpack your autoclave

Answer 6

To allow steam to circulate freely

Question 7

Autoclave sterile indicators

Answer 7

1. Gauges (temp & pressure)
2. Chemical strips
3. Biological
4. Melting pellet glass

Question 8

What are the only 2 Autoclave indicators that are reliable that should be done once a month

Answer 8

Biological (B. stearothermophilus)
Melting pellet glass (melts at 244 degrees F)

Question 9

What is the ideal combination for autoclave indicators

Answer 9

1. Tape outside always
2. Chemical inside always
3. Regular biologic

Question 10

Higher elevation decreases pressure. What is the ratio for PSI settings on an autoclave to maintain 121C

Answer 10

2000 ft elevation gain = Increase one PSI