Lecture 2 part 2 Flashcards Preview

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Flashcards in Lecture 2 part 2 Deck (14):
1

What is measured in an Arterial Blood Gas (ABG)?

Hydrogen-ion concentration (pH), Base excess (BE), Bicarbonate (HCO3), Partial pressure of CO2 (PCO2), Partial Pressure of O2 (PO2)

2

What is the normal pH values of arterial blood gases?

pH 7.35-7.45

3

What are the normal PCO2 (Partial pressure of CO2) values?

40-45mmHg

4

Normal value of PO2

80-105mmHg

5

Normal Value of HCO3 (Bicarbonate)

20-26 mmols/L

6

Normal Value of Base Excess (BE)

-2.0 - +2.0

7

Whats a normal O2 Saturation?

95%-100%

8

Does the pH alone indicate acid base balance?

Does the pH alone indicate acid base balance?
No – pH, PCO2 and HCO3 must all be within normal range, if any of them aren’t that indicates an acid base imbalance

9

What is Hypoventilation?

Raised levels of Carbon Dioxide in the blood causing sever problems due to acidity

10

Common causes of Hypoventilation?

Airway obstruction, CNS depressant drugs, CNS disease, Peripheral neuromuscular disease, Exhaustion

11

Treatment for Hypoventialtion?

100% humidified oxygen, keep sat’s above 90%, provide assisted ventilation, reverse any CNS drug induced depression, Contact specialist help

12

What are the normal airway protective mechanisms?

Epiglottis, Glottic closure reflex, Laryngospasm, Cough reflex, Apnea reflex

13

Do high concentrations of Oxygen depress respirations in patients with acute respitrary failure?

No

14

What is a Variable Performance device (O2 delivery systems)

O2 delivery system that doesn’t provide all the gas necessary for minute ventilation. O2 concentration depends on amount delivered