Circulatory Shock

Question 1

what is circulatory shock?

Answer 1

circulation failure resulting in a lack of perfusion to vital organs

Question 2

what are the signs of circulatory shock?

Answer 2

veery low blood pressure but very high respiratory rate

Question 3

what 3 factors does blood pressure rely on?

Answer 3

heart pumping, tone of smooth muscle surrounding blood vessel, and enough blood (5L)

Question 4

what happens if the tone of smooth muscle decreases?

Answer 4

blood vessels dilate so blood flow slows and pressure decreases

Question 5

Which artery is used to detect blood pressure and o2?

Answer 5

carotid arteries. carotid sinuses for blood pressure and carotid bodies for partial pressure of o2

Question 6

what happens when blood pressure change is detected?

Answer 6

carotid sinuses detect change and send signal to brainstem to tell heart to pump blood harder and faster

Question 7

How is the brainstem involved in sympathetic stimulation? (2)

Answer 7

Increases vascular tone in vessels in limbs and abdomen, so blood is pushed to the chest and head (lungs, heart, brain). Sends signal to adrenal gland to secrete adrenaline to pump heart faster and harder

Question 8

what are the three main causes of septic shock?

Answer 8

hypovolaemic shock, septic shock, cardiogenic shock

Question 9

What causes hypovolaemic shock?

Answer 9

not enough fluid circulating the body. leads to low blood pressure, high reps. rate, sweating. can occur after injury - e.g. ruptured spleen so blood leaking into stomach cavity

Question 10

What causes cariogenic shock?

Answer 10

Heart disease. insufficient at pumping blood to maintain pressure - no blood loss. fixed with meds

Question 11

What causes septic shock?

Answer 11

bacteria in blood can release chemicals, which cause vasodilation and lead to low venous pressure so not enough blood perfused to vital organs