ABG, Oximetry, & Spirometry Flashcards Preview

Clin Med I - Pulmonary > ABG, Oximetry, & Spirometry > Flashcards

Flashcards in ABG, Oximetry, & Spirometry Deck (26):
1

What information is obtained from an ABG?

- acid base status
- oxygenation
- CO2 elimination (aka ventilation)
- COHb & methemoglobin level

2

What are the indications for ABG?

- assess the ventilatory status, oxygenation, & acid base status (CO2, O2, & pH, respectively)
- assess the response to an intervention

3

What are the contraindications for ABG?

- bleeding diathesis
- AV fistula
- severe peripheral vascular disease, absence of an arterial pulse (arteriolosclerosis)
- **infection over the site**

4

What are the differences between ABG and pulse ox?

- pulse ox is non-invasive & provides immediate, continuous data
- **pulse ox does not assess ventilation (CO2) or pH**
- pulse ox unreliable when pO2<70-80%
- pulse ox cannot interpret methemoglobin or COHb

5

T/F: Pulse oximetry can assess the patients ventilation (CO2).

- FALSE!

6

Which artery is used in ABG?

- *radial artery
- femoral, dorsal pedis, brachial

7

What will the ABG values be for a patient in respiratory acidosis?

- low pH
- high pCO2

8

What will the ABG values be for a patient in metabolic acidosis?

- low pH
- low HCO3

9

What will the ABG values be for a patient in respiratory alkalosis?

- high pH
- low pCO2

10

What will the ABG values be for a patient in metabolic alkalosis?

- high pH
- high HCO3

11

What is the disorder of a patient with ABG values of low pH and high pCO2?

- respiratory acidoisis

12

What is the disorder of a patient with ABG values of high pH and low pCO2

- respiratory alkalosis

13

What is the disorder of a patient with ABG values of low pH and low HCO3?

- metabolic acidosis

14

What is the disorder of a patient with ABG values of high pH and high HCO3?

- metabolic alkalosis

15

What are the causes of respiratory alkalosis?

- hyperventilation

16

What are the causes of respiratory acidosis?

- hypoventilation

17

What does VBG assess?

- pH
- CO2

18

What should spirometry be used to diagnosis?

- asthma
- COPD

19

What S&S would lead to a dx of asthma?

- wheezing
- hx: cough worse @ pm, recurrent wheeze, difficulty breathing, & chest tightness
- 'wheeze with a squeeze'

20

What are indications for spirometry?

- persistent cough
- chronic sputum production
- breathlessness on exertion
- decreased activity
- occupational exposures
- (+) family hx

21

T/F: Spirometry is NOT recommended for screening of COPD.

- True

22

When should spirometry be used?

- initial assessment
- s/p tx (i.e. pharmacologic)
- loss of control of asthma
- q 1-2y
- demonstrate to the pt the tx that they cannot feel is actually working

23

What age group does not get spirometry?

- 0-4y

24

What are contraindications for spirometry?

- anything that has increased pressure

25

What does a low spirometry FEV1/FVC ratio indicate?

- obstructive dz

26

What does a non-low spirometry FEV1/FVC ratio and low FVC value indicate?

- restrictive dz