Cold Flashcards
what are the three cryotherapy physiologic responses
- dec blood flow
- dec tissue metabolism
- inc pain threshold
what is a conduction cold modality?
cold pack
how does temp difference influence response to cold?
higher the difference, greater the effect of cold
how does exposure tiem influence response to cold
longer the exposure, the greater the effect
how does thermal conductivity/sub cue fat influence response to cold
fat insulates and decreases the effect of cold
how does the type/size of cooling agent influence response to cold
ice slurry works best
how does surface area to be cooled influence response to cold?
larger surface area to be cooled = decreases effect of cold
how does activity level influence response to cold?
higher activity level requires more cooling
how deep does cold go?
3cm
wetted ice/cubed ice/crushed ice… which is most/middle/least effective at cooling?
- wetted
- cubed
- crushed
ice massage v ice bag, which has the greatest decrease in temp and which decrease temp faster?
equal dec in temp, ice massage faster
what is a cold convection modality?
cold WHIRLPOOL
what cools better and why, conduction or convection?
convection such as whirlpool because it continuously cycles cold water to pull heat from the body
what is an example of an evap cooling modality?
vapocoolant
how does vapocoolant work (4 steps)
- heat tx to liquid to vapor
- spray stimulates thermal afferents
- reduced motor neuron activity
- increased ROM
what is the hemodynamic effect of cold?
- cold applied
- vasoconstriction and increased blood viscosity
- decreased in bloodflow
how does vasoconstriction occur?
cold stimulates thermal sensors which leads to INCREASED SYMPATHETIC ADRENERGIC fiber response
how does vasodilation occur?
cold stimulates thermal sensors which leads to DECREASED SYMPATHETIC ADRENERGIC fiber response
describe ice’s use post-trauma
reduces inflammation in the first 48, compression and elevation help with edema, overwhelmingly safe to use
how does cold influence muscle contraction?
brief periods of cold (less than 10 min) may increase isometric contraction
how does cold influence performance?
10+ min of cooling diminishes performance (40 yd dash, vert, agility)
how does cold impact joint position sense?
decreases balance but doesn’t effect proprioception
how do cold modalities have neuromuscular effects?
decrease spasticity, deep tendon reflexes, and muscle spindle activity
how does cold affect MS patients?
improves balance and TUG while wearing a cooling vest
what is megan’s sports team
steelers
when do you choose ice? (5)
acute msk trauma pain spasm myofascial pain guarding
is ice good for DOMS
no, no evidence
what are the six contraindications for cold
- cold urticaria
- cryoglobulinemia
- raynauds
- paroxysmal cold hemoglobinuria
- area of nerve regen
- area of compromised circulation
what are seven precautions for cold
- HTN
- hypersensitivity
- circulation
- wound
- superficial peripheral nerve
- cold aversion
- poor cognition/comm
why is ice more effective than gel?
takes more energy to melt ice
how long to ice massage?
5-8 min
how do you use vapocoolant? does it work?
- hold 12-18 inches
- spray proximal to distal
- stretch
no proof it works
how cold is the water in a cold bath?
50-60 F
what MUST you do after applying a modality
reassess pain/ROM and document
what are the stages of cold
cold stinging burning aching numbness
