3 Flashcards
daltons law
partial pressure of gas
henrys law
at a consstant temp, the amount of gas dissolved is directly proportional to the partial pressure of the gas over the solution
the higher the gas pressure- the more it will dissolve into a liquid
inc pressure- inc solubility
inc temp dec solubility= faster wake up of anesthesia
hypothermia= inc solubility- prolonged metabolism and clearance
example of application of henrys law
overpressurizing gas
what is oxygen delivery equation
DO2 = CO x [(1.34 x Hgb X SPO2) + (PaO2 x 0.003)] X CO X 10
ficks law
diffusion/ transfer rate of gas throught tissue medium (grahms and henrys law)
grahms law
speed of gas diffusion
molecular wt of gas determines how fast it diffuses through a membrane
smaller molecules diffuse faster
application: second gas effect; high fgf causes turbulence
what is directly proportional in grahams law
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what is boyles law an example of
pneumatic bellows for ppv
diaphragm contraction inc vt
constant temp
what is charles law an ex of
constant pressure
lma cuff ruptures in autoclave
what is gay lussac law example of
constant volume
o2 tank explodes in hot env
ohms law
current passing through conductor is directly proportional to voltage and inversley proportional to resistance
poiseuilles law
laminar flow through a tube- vessel diameter, viscosity and tube length
with poiseuilles law, inc radius inc flow by
4x. doubling radius inc flow 16x
bernoullis principle
relationship between pressure velocity of a moving fluid/ gas
inc velocity = dec pressure
dec velocuty= inc pressure
venturi effect
if pressure in tube fallows below atm pressure, air entrapment occurs
ex: jet vent, venturi mask, nebulizer
condana effect
jet flow attaching to a durface and following curve of surface- mitral regurg
number 1 nerve injury
ulnar- clar injury
how do you hurt radial nerve
bp cuff, iv pole, upper extrem tournniquet
obturator injury
cannot adduct
sciatic nerve injury
excessive hip flexion and exteernal rotation. foot drop
pudental nerve injury
from ortho fracture table- loss of penile sensation
n injury from crossing legs
sural from top leg
superficial peronal of bottom leg
saphenous n injury
medial leg- no sensation over anteromedial leg
common peroneal n
stirrups/ lithotomy- foot drop, no foot eversion, no dorsiflexion
torso for burns
36%
parkland
4 ml LR / % tbsa x kg
1/2 first 8 hrs other half remaining 16 hrs
when is fluid shift and edema greatest
within first 12 hours
what is first fluid choice
LR -> d5w after 24 hrs
no albumin first 24 hrs
best way to prevent intraop hypothermia
fluid warmer, forced air blanket
what to avoid with intermittent porphoryia
barbituates, etomidate, toradol, amiodarone, ccb
what do you dose ibw for obesity
propofol, roc, vec, remi
what do you dose lbw with obesity
sux, cisatr, atrac, versed
obesity decreased lung volumes
frc, erv, rv
what inc with obesity
cc, co, sv
ebv in obesity
50 ml/kg
bmi calculation
wt in kg / ht in cm
ibw men
ht in cm - 100
ibw female
ht in cm - 105
lbw calculation
ibw x 1.3
f=
f = (c x 1.8) + 32
ett depth of chest xray
looked at c3-c4 -> first clavicle
normal 2-3 cm above carina
match item and an intervention to prevet it
radiation
conduction
convention
evaporation
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how much na in a 0.9% ns or LR
9g
cryo is used to replace clotting factors in which conditions
hemophilia a, b, vwd
pt sitting position, bp at ht is 70, what is bp 10 cm higher at head
every 10 cm change bp changes 7.4 mmhg
every 1 inch change it changes 2 mmhg
loop diuretics site of action HOT SPOT
ascending limb of loop of henle
mannitol dose with conversion g/dl to ml
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eye muscle most likely to elicit occulocardiac reflex
medial rectus
child pugh score for liver tx parameters
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admistering epidural to mom who refused
battery, assault, intentional tort
provider recieving money or financially benefiting from something is called
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