tee, thermoregulation Flashcards
general and regional anesthesia cause vaso__
dilation
temp monitoring is required for
peds patients receiving general and when indicated on other patients
factors that place patients at high risk for hypothermia
high ASA status, lengthy surgery, combined epidural and general, elderly, lean body mass
protective factors for hypothermia
increased body weight, higher pre-op temp, warmer rooms
hypothermia is core body temp less than
36
who’s at greatest risk of developing hypothermia?
extremes of age
o2 consumption is reduced by ___ degrees for every 1 degree C
5-7
when is hypothermia useful
CVA, aneurysm clipping, TBI, <3 bypass, cardiac arrest, carotid endarterectomy
where should the esophageal probe be placed
distal 1/3 to 1/4 of the esophagus, 38-42cm past incisors
shivering __ the risk of myocardial ischemia and infarction
increases.
hypothermia causes ___ emergence
prolonged
phase 1
heat redistribution from core to periphery
phase 2
heat transfer > heat production
phase 3
heat transfer = heat production
what composes the afferent limb?
thermoreceptors on skin, deep tissue, and spinal cord, send info to hypothalamus
what composes the control center?
hypothalamus (pre-optic) and brain stem
efferent response to cold
vasoconstriction, piloerection, shivering, non shivering thermogenesis
efferent response to hot
vasodilation, diaphoresis
order of heat loss
radiation> convection> evaporation > conduction
efferent response process
responsible for sending the calculated response to targeted functioning systems within the body. (subcutaneous blood flow, sweating, skeletal muscle tone, metabolic activity.
mild hypothermia
32-35
mod hypothermia
28-32
severe hypothermia
<28
hypothermia causes __ wave
J wave - osborne wave. slow upright deflection between the end of the QRS and early portion of ST segmen
