Part 6 - Recognition of Shock Flashcards Preview

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Flashcards in Part 6 - Recognition of Shock Deck (29):
1

A critical condition that results from inadequate tissue delivery of O2 and nutrients to meet tissue metabolic demand

Shock

2

T/F Shock is always characterized by inadequate peripheral end-organ perfusion

F; not always

3

T/F The definition of shock depends on BP measurement

F; it can occur with a normal, increased, or decreased SBP

4

T/F In children, most shock is characterized by low cardiac output

T

5

T/F All types of shock can result in impaired function of vital organs

T

6

Fever, infection, injury, respiratory distress, and pain may contribute to shock by

Increasing tissue demand for O2 and nutrients

7

The goal in the treatment of shock

Improve O2 delivery

8

Acid-base derangement in shock

Metabolic acidosis

9

O2 content of the blood is determined primarily by

1) Hgb concentration 2) Percent hemoglobin saturated with O2 (SaO2)

10

Volume of blood pumped by heart per minute

Cardiac output

11

Volume of blood pumped by the heart with each beat

Stroke volume

12

Cardiac output is a product of

HR and SV

13

Infants are dependent on ___ to maintain cardiac output

Heart rate; stroke volume cannot increase very much

14

T/F The arterial blood contains more O2 than what the tissue needs

T

15

Refers to low blood O2 sat

Hypoxemia

16

Refers to oxygen deprivation of a region of a body or organ

Hypoxia

17

T/F Hypoxemia alone can result in hypoxia

F

18

Tissue oxygenation and O2 delivery are determined by

1) CO 2) Blood's arterial O2 content

19

T/F O2 delivery may be normal despite hypoxemia

T; if increase in CO is commensurate with decrease in O2 content

20

Stroke volume is determined by

1) Preload 2) 1/Afterload 3) Contractility

21

MCC of low stroke volume and, therefore, low CO

Inadequate preload

22

Inadequate preload can cause what type of shock

Hypovolemic shock

23

Hypoglycemia can cause what type of shock

Cardiogenic

24

Toxic ingestion of CCB can cause what type of shock

Cardiogenic

25

Increase after load can cause what type of shock

Cardiogenic shock

26

Preload is best measured by

Central venous pressure

27

Central venous pressure is measured in the

SVC or right atrium

28

Situations that can cause decreased end-diastolic volume despite increased CVP

Increased pressure around the atrium such as tension pneumothorax or pericardial tamponade (venous return to the heart is obstructed)

29

Physiology of septic shock

Inappropriate vasodilation and maldistribution of blood flow > decreased preload