Week 3 Flashcards
Perfusion definition
The ability of the cardiovascular system to provide tissues with an adequate blood supply to meet their functional demands and to effectively remove the associated metabolic waste products
Shock definition
The failure of the circulatory system leading to inadequate organ
perfusion and tissue oxygenation
Factors affecting oxygen delivery to tissues
HR
SV
SVR
Haemoglobin
SpO2
Systems involved in perfusion regulation
ANS (chemoreceptors and baroreceptors)
RAAS
Adrenal glands
Splenic discharge
Fluid shifts
Lethal triad
Hypothermia, acidosis, coagulopathy
Neurogenic shock in trauma usually occurs with spinal cord injury above which vertebra?
T6
Becks triad (pericardial tamponade)
Low arterial BP
Distended neck veins
Muffled heart sounds
Haemorrhaging hypovolemia CPG care objectives
Identify and control major haemorrhage
Ensure vital organ perfusion while minimising coagulopathy, acidosis and hypothermia
Rapid transport to definitive care
Potential mimics of hypovolaemia
Tension pneumothorax
Significant pain
Environmental exposure (heat/cold)
How long can patients with SBP >70 tolerate hypotension without fluid replacement?
2 hours
