CC 03 WAVEFORMS

Question 1

dynamic compliance vs airway resistance

Answer 1

As dynamic compliance decreases, airway resistance will increase

Question 2

Normal static compliance

Answer 2

50 to 100

Question 3

What are the most common waveforms used?

Answer 3

1 Pressure-time
2 Flow-time
3 Volume-time

Question 4

What should you do if you see a ‘scooped out appearance’ on the rise of the waveform

Answer 4

means inadequate flow. You need to increase the flow

Question 5

static compliance formula

Answer 5

TV (measured**)/(plat-PEEP)

Question 6

dynamic compliance formula

Answer 6

TV measured*/(PiP-PEEP)

Question 7

what dz processes would cause a decrease in both dynamic and static compliance

Answer 7

1 ARDS
2 Pulmonary Edema
3 Fibrosis
4 Atelectasis
5 Pnuemo
6 Pneumonia

Question 8

A decrease only found in dynamic compliance would be caused by what dz processes

Answer 8

1 Bronchoconstriction
2 Partial airway obstruction
3 Secretions
4 Asthma

Question 9

Two types of loops

Answer 9

Pressure/Volume and Flow/Volume loops

Question 10

Part of the pressure volume loop where it first starts to change direction

Answer 10

These are the inflection points. A lower one and a higher one. **Lower is usually in the inspiration side.

Question 11

When will the pressure volume loop move in a clockwise direction?

Answer 11

During a spontaneous breath

Question 12

If all you had was to look at a pressure volume loop, how would you know where to place their PEEP level at?

Answer 12

Start the PEEP at the lower inflection point