Monitoring Oxygenation

Question 1

2 ways to measure oxygenation

Answer 1

pulse oximeter or blood gas

Question 2

T/F: the colour of mucus membranes is a reliable method of measuring oxygenation

Answer 2

false, this is just an estimate and can’t be relied on alone

Question 3

About ____ of the O2 in blood is dissolved in plasma, and this is proportional to _____.

Answer 3

2%, PaO2

Question 4

____ of oxygen in the blood is bound to hemoglobin.

Answer 4

98%

Question 5

A PaO2 < 60mmHg or SaO2 <90% indicate

Answer 5

hypoxemia

Question 6

Which of the following is FALSE regarding pulse oximetry?
A) continuous monitoring is possible
B) non-invasive
C) results affected by tissue thickness
D) expensive

Answer 6

D - its cheap

Question 7

What are the results of pulse oximetry affected by?

Answer 7

tissue thickness, hypo perfusion (vasoconstriction), anemia, pigmentation, movement, presence of abnormal Hb species (CO poisoning or methemoglobinemia)

Question 8

T/F: If SpO2 = 100% and FiO2 = 1 and PaO2 <500mmHg, oxygenation is normal.

Answer 8

False!

Question 9

3 important times to use pulse oximeter

Answer 9

patient breathing air
V/Q mismatch
respiratory disease

Question 10

Normal PaCO2 is?

Answer 10

35-45mmHg

Question 11

What is ventilation

Answer 11

the process involved in the movement of air in and out of the alveoli

Question 12

PaCO2 > 45mmHg

Answer 12

hypercapnia or hypoventilation

Question 13

PaCO2 < 35 mmHg

Answer 13

hypocapnia or hyperventilation

Question 14

4 ways to assess RR

Answer 14

auscultate thorax
look for movement of thorax and abdomen
movement of breathing bag
read monitor (capnograph)

Question 15

What is capnometry

Answer 15

measurement of CO2 partial pressure in the airway

Question 16

4 factors that influence ETCO2 values

Answer 16

CO2 production
Circulation
alveolar ventilation
measurement error

Question 17

4 phases of a capnogram

Answer 17

baseline (inspiration)
expiratory upstroke
alveolar plateau
inspiration begins

Question 18

Which phase of the capnogram refers to the ETCO2?

Answer 18

D (top right corner)

Question 19

T/F: Hyperthermia is more common than hypothermia

Answer 19

false, other way around

Question 20

Which is FALSE regarding hypothermia?
A) CV system may be depressed (bradycardia)
B) may prolong recovery
C) decreases MAC of anesthetics 
D) none of the above

Answer 20

all of these are true, the answer is D

Question 21

T/F: hyperthermia may result in damage to the CNS

Answer 21

true!

Question 22

The most biologically relevant measurement of body temperature is the ___

Answer 22

core body temperature

Question 23

T/F: it is safe to increase the vaporizer to treat hyperthermia

Answer 23

false!! anesthetic depth should be determined without regard to body temp, you must cool the body

Question 24

5 ways to know patient is alive

Answer 24

pulse
auscultate heart beat
doppler
patient has a BP
ET CO2 is normal

Question 25

Which is the best anesthesia tool

Answer 25

your knowledge!