Foundations- Hypotension & Shock Flashcards Preview

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Flashcards in Foundations- Hypotension & Shock Deck (15):
1

Define Hypotension

Low blood pressure:
SBP<90 OR decrease in SBP of >40 mmHg OR
MAP <60

2

Define Shock

Physiologic condition of inadequate systemic tissue perfusion
=decreased O2 delivery--> cellular hypoxia and metabolic malfunction

3

Define Systemic Vascular Resistance (SVR)

Resistance to blood flow offered by ALL of the systemic vasculature

4

What is SVR influenced by?

1. Length
2. Diameter
3. Blood viscosity

5

Pre-shock

-Tachycardia
-Peripheral vasoconstriction
-Decreased BP

6

Clinical presentation of Shock

-Tachycardia
-Dyspnea
-Metabolic acidosis
-Oliguira (decreased urine output)
-Confusion
-Cool, clammy skin

7

Sx's of end-organ dysfunction

-Irreversible organ damage
-Coma
-Death

8

What does the central venous pressure (CVP) measure?

-Pressure in the right atrium
-Correlates to preload or overall volume status

9

When would you use a Swan-Ganz catheter over a normal central line?

Patients in cariogenic shock

10

What is the normal pulmonary capillary wedge pressure (PCWP)?

5-15 mmHg

11

What is normal CP?

4-8 L/min

12

What is normal systemic vascular resistance (SCR)?

1000-1500 dynes/sec/cm5

13

Define Hypovolemic Shock

Inadequate intravascular volume--> leads to decrease CO and decrease oxygen delivery

14

Etiology of Hypovolemic Shock

Hemorrhagic
1. Trauma
2.GI bleeding
3. Internal hemorrhage
4. Post-surgical

Non-hemorrhagic
1. Dehydration
2. Protracted nausea, vomiting, diarrhea
3. Burns
4. Acute pancreatitis

15

Define Cardiogenic Shock

Decreased cardiac output secondary to pump failure