01: NIF Vd/Vt Etc

Question 1

Purpose of tidal volume measurement

Answer 1

Spontaneous ventilation

Question 2

Purpose of vital capacity

Answer 2

Ventilatory reserve under stress

Question 3

Purpose of minute ventilation

Answer 3

Ability to tolerate weaning

Question 4

IC

Answer 4

Max inspired volume from resting, determines appropriateness of tx

Question 5

IC =

Answer 5

Vt + IRV

Question 6

Purpose of NIF

Answer 6

Test respiratory muscle strength

Question 7

RSBI equation and NV

Answer 7

f / Vt (in L)
<105 good
>105 bad

Question 8

VD/Vt equation and normal values

Answer 8

PaCO2 - PECO2 / PaCO2
If no PECO2? 1ml/lb IBW / given Vt
NV: 25 - 40%

Question 9

Vt equation and NV/min

Answer 9

= VE / RR
6-8
5

Question 10

Vc NV/min

Answer 10

65-75 ml/kg IBW
10 ml/kg IBW

Question 11

VE equation, NV, and what being outside of the range means

Answer 11

Vt x RR
5-10 L/min
<5 hypoventilation
>10 working too hard (fatigue)

Question 12

NIF NV/min

Answer 12

-80
Min: -20

Question 13

Pressure manometer measures

Answer 13

NIF

Question 14

Respirometer measures

Answer 14

VE
VC
Vt
Peak flow

Question 15

What values will increase CO2 and decrease O2

Answer 15

Low VC
Low Vt
Low NIF

Question 16

Vd/Vt over 60%?

Answer 16

Needs ventilation

Question 17

Rationale for vent assessment

Answer 17

Ability to spontaneously breathe
Adequate ventilatory reserve
Effective cough
Additional effort
Bronchodilator effectiveness
Change in status