SHOCK HEMODYNAMICS Flashcards

1
Q

HEMODYNAMICS

PERFUSION IS PROPORTIONAL TO:

A
  1. CO
  2. Systemic vascular Resistance
  3. OXYGEN CONTENT
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2
Q

HEMODYNAMICS

CARDIAC OUTPUT IS EQUAL TO?

A

Stroke Vol x Heart Rate

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3
Q

HEMODYNAMICS

Stroke Vol is affected by (4)

A

preload

afterload

Contractility

preload - afterload = SV

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4
Q

HEMODYNAMICS

Systemic Vascular Resistance

most common way to increase resistance?

A

decrease diameter of the blood vessel

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5
Q

HEMODYNAMICS

MAP by way of BP is equal to?

A

2/3 diastyloic - 1/2 systolic

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6
Q

HEMODYNAMICS

MAP

Mean Arterial Pressure is equal to?

A

CO x SVR x CVP

CVP is usually so low you can drop it out of the equation

NOTE RELATIONSHIP AND HOW a pt in shock can have adequate BP but no perfusion

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7
Q

HEMODYNAMICS

MAP= CO x SVR x CVP

Perfusion is proportional to CO, SVR, Oxygen content

A

This explains why there is often low BP and low tissue perfusion simmulatously

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8
Q

HEMODYNAMICS

How do you assess/measure Heart Function?

A
  1. BP
  2. CO
  3. SVR
  4. Troponin
  5. Echocardiogram
  6. PCWP
  7. CVP
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9
Q

HEMODYNAMICS

BP =

A

BP=CO x SVR

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10
Q

HEMODYNAMICS

CO =

A

CO = SV x HR

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11
Q

HEMODYNAMICS

SV effected by 3 factors

A
  1. Preload
  2. Afterload
  3. Contractability
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12
Q

HEMODYNAMICS

SV =

A

SV = Preload - Afterload

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13
Q

HEMODYNAMICS

Tissue Perfusion is proportional to (3)

A

CO

SVR systemic vascular resistance

Oxygen Content

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14
Q

HEMODYNAMICS

MAP =

A

MAP = CO x SVR x CVP

CVP is so small it can ge dropped from the equation

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15
Q

HEMODYNAMICS

  1. What does elevated Troponin level indicate
  2. What is normal level?
  3. Troponin ALERT LEVEL?
  4. How long does Troponin level stay increased?
A
  1. Heart muscle damage
  2. <0.35 ng/ml
  3. >0.5 ng/ml
  4. 3 weeks

Davis

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16
Q

HEMODYNAMICS

Central Venous Pressure

  1. Tells you what?
  2. via Pulmonary Artery Catherer where is the monitor?

Evaluating the function of the heart and vessels

A
  1. Pressure in RIGHT side Atrium Pressure
  2. in the Superior Vena cava/Inferior just area before entering right side of heart
17
Q

HEMODYNAMICS

Pulmonary Cappillary Wedge Pressure

  1. Tells you what?
  2. via Pulmonary Artery Catherer where is the monitor?

Evaluating the function of the heart and vessels

A
  1. Pressure in LEFT side Atrium Pressure
  2. in the Cappillaries of the pulmonary artery
18
Q

HEMODYNAMICS

Cardiogenic Shock: Increase or decrease in PCWP? and WHY?

A

Increase PCWP because heart is not fxn properly and pushing blood forward, blood is pooling in the heart

19
Q

HEMODYNAMICS

Hypovolemic Shock: PCWP increase or decrease?

Why?

A

decrease because of the decrease in blood volume in the heart

20
Q

HEMODYNAMICS

How do you assess oxygen content in the blood?(3)

A
  1. Pulse Oximetery
  2. Arterial Blood Gases
  3. via Pulmonary Arterial Cathether you can get ScvO2
21
Q

HEMODYNAMICS

ScvO2

  1. Measure what?
  2. Why is this important?
  3. Placed where?
A
  1. Oxygen saturation of central venous (superior and inferior vena cave
  2. Tells you oxygen content before entering the heart. If you have a increase ScvO2 then that means
  3. via Pulmonary Artery Catheter monitor is in Superior vena cava area