5 Haemodynamic Shock Flashcards
What is the formula for mean arterial blood pressure?
CO*TPR
What is haemodynamic shock?
Acute condition of inadequate blood flow throughout the body , inadequate perfusion to vital organs, organ shut down
What is the problem in cardiogenic shock?
Ventricle cannot empty properly
What is mechanical shock?
Ventricle cannot fill properly
What is hypovolaemic shock?
Reduced blood volume leads to poor venous return
What are the potential causes of cardiogenic shock?
Myocardial infection
Serious arrhythmias
Worsening of heart failure
What happens to CVP in cardiogenic shock?
Raised
What is problem in obstructive shock?
Heart is pumping correctly it is just not pumping
What are the two common types of obstructive shock?
Pulmonary embolism
Cardiac tamponade
What is cardiac tamponade?
Cardiac tamponade is pressure on the heart that occurs when blood or fluid builds in the pericardial space
What happens to venous pressure in obstructive shock?
Increases
What is the left arterial pressure like with a pulmonary embolism?
Low
Where does the embolus come from?
DVT
What is hypovolemic shock?
A life threatening conditions that results when you lose more than 20% of your blood
What happens to venous pressure in hypovolemic shock?
Drops as no blood coming back?
What happens to CO in hypovolemic shock?
Drops - none coming back to pump
What is internal transfusion?
Net movement of fluid from interstitial fluid into the capillaries, due to the reduced hydrostatic pressure
What can hypolvaemic shock result from?
Severe burns
Severe diarrhoea
Severe vomiting
Loss of sodium ions
How do hypovolaemic shock present?
Tachycardia
Weak pulse
Pale skin
Cold and clammy extremities
How is blood volume restored following hypovolemia?
RAAS
ADH
What is distributive shock?
Low resistance shock
Leads to a change in the peripheral resistance
What is sepsis?
Life threatening response to infection
What causes vasodilation in septic shock
excessive inflammatory response in response to endotoxins
What is the Septic 6?
High flow oxygen Take Blood cultures Give antibiotics Give a fluid challenge Measure lactate Measure urine
