Respiration and Respiratory Monitoring

Question 1

Two parts of breathing:

Answer 1

Convection: Moves gases into and out of the lungs
Diffusion: Exchanges gases in the lung parenchyma

Question 2

Oxygen consumption

Answer 2

Vo2 = W^ (0.75) * 10

ml/min

Question 3

Respiratory Quotient

Answer 3

Rq = Vco2/Vo2

The respiratory quotient for a metabolically normal, euthermic patient is 0.8

Question 4

minute ventilation

Answer 4

VE =VT xf

Question 5

Steps for ventilating carbon dioxide:

Answer 5

FIRST, CO2 leaves the gas exchange region by diffusion. THEN, CO2 is transported through the conducting airways
by convection to the mouth and nose.

Question 6

Anatomic deadspace volume

Answer 6

Volume d anat = 2.2 ml/kg or 1ml/lb

Question 7

Anatomic deadspace ventilation

Answer 7

Ventilation d anat= deadspace volume x respiratory rate

Question 8

minute ventilation

Answer 8

alveolar ventilation + deadspace ventilation = Minute ventilation

Question 9

What relationships exist for partial pressures of carbon dioxide?

Answer 9

PE’co2 α PAco2 α Paco2
where PAco2 is ideal alveolar partial pressure of carbon dioxide and PE’co2 is end-tidal partial pressure of carbon dioxide

Question 10

Parts of a capnogram:

Answer 10

PE’co2 – end-tidal partial pressure of carbon dioxide
PIco2 – inspired partial pressure of carbon dioxide
tI – inspiratory time
tE – expiratory time
phase III slope

Question 11

what is the only true measure of the effectiveness of ventilation

Answer 11

PaCO2