Week 5 Shock and Hypertension

Question 1

what is shock

Answer 1

condition where circulatory system cannot provide enough blood supply to vital body organs

Question 2

what is shock often caused by

Answer 2

low MAP

caused by any of its determinants
MAP = CO x TPR
CO = HR x SV
MAP = HR x SV x TPR

Question 3

cause of hypocolaemic shock

Answer 3

low blood volume

Question 4

cause of cardiogenic shock

Answer 4

heart fails to pump properly

like infarction or fibrillation

Question 5

cause of anaphylactic shock

Answer 5

severe reaction

Question 6

cause of septic shock

Answer 6

overwhelming bacterial infection

Question 7

Haemorrhage definiton

Answer 7

bleeding

Question 8

types of hypovolaemic

Answer 8

haemorrhage - blood loss

non-haemorrhage - loss of blood or plasma
causes inc diarrhoea, urinary loss, dehydration

Question 9

pathophysiology of haemorrhagic/non-haemorrhagic hypovolaemia

Answer 9

low CO = low MAP
low SV

Question 10

what is cardiogenic shock in terms of CO

Answer 10

a low CO, low SV, low HR

Question 11

pathophysiology of cardiogenic shock

Answer 11

no fluid loss
low SV = low CO = low MAP

Question 12

baroreceptor reflex - short term compensatory mechanism

Answer 12

quickly compensates for changes in MAP
and increases conduction of AVN

Question 13

what is irreversible shock

Answer 13

where too much blood (15-20%) is lost - compensatory mechanisms are insufficient

Question 14

what is hypertension

Answer 14

where MAP is maintained at or above 140/90 mmHg

chronically elevated BP = resets baroreceptors so BP is regulated but at a higher level