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CVS > 5 Haemodynamic Shock > Flashcards

5 Haemodynamic Shock Flashcards

1
Q

What is the formula for mean arterial blood pressure?

A

CO*TPR

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2
Q

What is haemodynamic shock?

A

Acute condition of inadequate blood flow throughout the body , inadequate perfusion to vital organs, organ shut down

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3
Q

What is the problem in cardiogenic shock?

A

Ventricle cannot empty properly

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4
Q

What is mechanical shock?

A

Ventricle cannot fill properly

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5
Q

What is hypovolaemic shock?

A

Reduced blood volume leads to poor venous return

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6
Q

What are the potential causes of cardiogenic shock?

A

Myocardial infection
Serious arrhythmias
Worsening of heart failure

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7
Q

What happens to CVP in cardiogenic shock?

A

Raised

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8
Q

What is problem in obstructive shock?

A

Heart is pumping correctly it is just not pumping

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9
Q

What are the two common types of obstructive shock?

A

Pulmonary embolism

Cardiac tamponade

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10
Q

What is cardiac tamponade?

A

Cardiac tamponade is pressure on the heart that occurs when blood or fluid builds in the pericardial space

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11
Q

What happens to venous pressure in obstructive shock?

A

Increases

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12
Q

What is the left arterial pressure like with a pulmonary embolism?

A

Low

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13
Q

Where does the embolus come from?

A

DVT

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14
Q

What is hypovolemic shock?

A

A life threatening conditions that results when you lose more than 20% of your blood

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15
Q

What happens to venous pressure in hypovolemic shock?

A

Drops as no blood coming back?

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16
Q

What happens to CO in hypovolemic shock?

A

Drops - none coming back to pump

17
Q

What is internal transfusion?

A

Net movement of fluid from interstitial fluid into the capillaries, due to the reduced hydrostatic pressure

18
Q

What can hypolvaemic shock result from?

A

Severe burns
Severe diarrhoea
Severe vomiting
Loss of sodium ions

19
Q

How do hypovolaemic shock present?

A

Tachycardia
Weak pulse
Pale skin
Cold and clammy extremities

20
Q

How is blood volume restored following hypovolemia?

A

RAAS

ADH

21
Q

What is distributive shock?

A

Low resistance shock

Leads to a change in the peripheral resistance

22
Q

What is sepsis?

A

Life threatening response to infection

23
Q

What causes vasodilation in septic shock

A

excessive inflammatory response in response to endotoxins

24
Q

What is the Septic 6?

A 
High flow oxygen 
Take Blood cultures 
Give antibiotics 
Give a fluid challenge 
Measure lactate 
Measure urine
25
Q

What is anaphylactic shock?

A

A severe allergic reaction

26
Q

What chemical mediator is released in excess in an anaphylactic shock?

A

Histamine

27
Q

What is given to someone with anaphylatic shock?

A

adrenaline

28
Q

What does adrenaline act on?

A

adreno receptor 1

CVS (22 decks)

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