Rpsgt: A-Step Module- Oxygen Therapy And Ventilation

Front 1

What is partial pressure of O2 (PO2)?

Back 1

arterial blood gas, most accurate

Front 2

What is the advantage of measuring Oxyhemoglobin Saturation (SaO2)?

Back 2

1) non-invasive
2) most accurate

Front 3

How much of air is comprised of oxygen?

Back 3

21% of air is O2

Front 4

What comprises a hemoglobin molecule?

Back 4

1) 4 sub units, each sub unit can bond with 1 O2 molecule

2) Composed of protein chain

3) Contains atoms of iron and O2 binding site

4) picks up O2 in lungs

Front 5

What SaO2 level (percent) requires therapeutic intervention?

Back 5

<88%

Front 6

What is the relationship between high oxyhemoglobin saturation and partial pressure O2?

Back 6

high saturation --> large changes in PO2, small changes in saturation

Front 7

What is the relationship between low oxyhemoglobin saturation and partial pressure O2?

Back 7

low saturation --> small drops in PO2, large changes in saturation

Front 8

What is hypoxemia?

Back 8

low blood oxygen levels

Front 9

What are the consequences of hypoexmia?

Back 9

1) Neurophysiological-impaired memory and judgement

2) Physiologic- hyperventilation, tachycardia, polcythemia, vasoconstriction, cardiac dysfunction

Front 10

What medical disease can cause hypoventilation?

Back 10

1) chronic lung disease
2) congestive heart failure
3) obesity
4) neuromuscular diseases
5) drugs with muscle relaxants or respiratory depressant effects.

Front 11

What are the treatments for hypoxemia?

Back 11

1) eliminate obstructive apnea events

2) Improve medical conditions

3) Supplemental O2

4) Supplemental Ventilation

Front 12

How does supplemental ventilation treat hypoxemia?

Back 12

increases breath size which increases amt of O2 available