superficial cold - intro to cryo Flashcards
what is cryotherapy
use of ice or cold for therapeutic purposes
what are the effects of cold in the body
hemodynamic
neuromuscular
metabolic
explain the initial general hemodynamic effect of cold
decrease in temp leads to initial decrease in blood flow
relate dec in temp and blood viscosity
dec in temp will inc blood viscosity = dec blood flow
relate dec in temp and vasodilators
dec in temp - dec release of histamine and prostaglandin - vasoconstriction = dec blood flow
relate dec in temp direct effect to cutaneous receptors
direct: dec in temp - cutaneous receptors will cause smooth muscle of bv to contract - vasoconstriction = dec blood flow
relate dec in temp indirect effect to cutaneous receptors
indirect: dec in temp - cutaneous receptors will pass impulse to DRG - inc in sympathetic adrenergic activation - vasoconstriction = dec blood flow
explain the later hemodynamic effect of cold
longer application of cold mga beyond 5-10 mins na continuous = CIVD
what is the hunting response
physiologic reax of the SNS - cycle of vasoconstriction and dilation of bv
what are the neuromuscular effects of cold
dec NCV
inc pain threshold
altered muscle strength
dec spasticity
facilitation of muscle contraction
further explain the dec of NCV due to cold
cooling = slower opening of ions kaya bumabagal
more effective on myelinated and small fibers (a-delta) - acute pain
less effect on unmyelinated and large fibers
further explain the inc of pain threshold due to cold
cold will cause gate control theory or interrupt the pain-spasm cycle
reduce NCV of sensory nerve and reduce edema
explain the significance of the pain-spasm cycle
usually pain will cause muscle guarding hence spasm - spasms will cause lactid acid formation or cramps = more pain tas ulit lng cycle
so pag may cold ma bbreak yung cycle nasslow yung NCM hence less pain
further explain how cold reduces edema and dec pain
reduced blood flow will reduce edema which liliit sha and di n sha mag ccompress sa free nerve endings
further explain the altered muscle strength due to cold
pag less than or 5 mins lang = inc straight bcs nasa temporary state of contraction yung muscle
pag more than 5-30 mins = dec straight bcs it inhibits contraction temporarily