38. Embolism Flashcards
VAE requirements
open vein
pressure in vein > subatmospheric pressure
VAE surgical position
can occur in any position
higher incident rate of VAE
sitting craniotomies
VAE presentation is dependent on
volume entrained
rate of air entrainment
presence of R-to-L shunt
as rate of air entrainment increases, what happens?
incr PAP
decr CO
RV overload
decr LV preload
nitrous and VAE
rapidly increases severity of VAE
VAE definitive diagnosis
Echo
VAE signs/symptoms
decr EtCO2 (stair step)
decr O2
tachycardia
hypotension
monitors to detect VAE
TEE
precordial doppler over RA
precordial doppler placement for VAE
over RA
between 3rd and 6th ribs
VAE treatment
prevent further entrainment
stop N2O
100% FiO2
aspirate air bubbles from CVC
give crystalloid to incr CVP
give vasopressor to correct htn
incr PEEP
head down/left tilt (durant’s)
polymethymethacrylate
exothermic
expansion
intramedullary pressures > 500mmHg
bone cement can cause embolism of
fat
bone marrow
cement
air
bone cement signs/symptoms
hypoxia
hypotension
arrythmias
PHTN
decr CO
bone cement embolism treatment
incr FiO2
euvolemia
adequate BP
rhabdo is associated with tourniquet inflation over _____ hrs
> 2hrs
pt experiences tourniquet pain after
60 mins
inflate tourniquet to _____
100mmHg above SBP
when are fat embolisms common
with long bone fractures
fat embolism signs/symptoms
dyspnea
confusion/coma
petechia
clotting dysregulation
hypoxia
resp failure
ST changes
decr EtCO2
signs/symptoms of RV strain
acute incr PHTN
pulm vasodilators
milrinone
fat embolism treatment
stabilization of frature
O2 therapy
hypotension correction
ARDS
disruption of cap-alveolar membrane
albumin leak into alveolar space resulting in fluid in the lungs causing inflammation
Acute lung injury
PaO2/Fio2 ration < 300
ALI causes
trauma
sepsis
aspiration
ARDS
PaO2/FiO2 ratio < 200
more severe than ALI
ARDS treatment
fix the cause
ARDS mgmt: Plat P
< 27 cmH2O
ARDS: TV
4-6 mL/kg
ARDS: FiO2
< 50%
ARDS: RR
< 30 breaths per min
ARDS: PEEP
<15 cmH2O
ARDS: drugs
NO
prostacyclin
PGE1
DVT
blood clot in vein that becomes thrombotic
more common in lower extremities
DVT risk factors
obesity
Age > 60
sx > 30 mins
tourniquet use
LE fracture
immobilization > 4 days
blood clotting disorders (Factor 5)
LE orthopedic risk of DVT
40-80% without prophylaxis
DVT pharmacological prophylaxis
LUFH
warfarin
LMWH (lovenox 40 mg)
DVT mechanical prophylaxis
IPC
SCD
compression stockings
what might lower risk of DVT
neuraxial anesthesia
DVT treatment
anticoags
thrombotics
IVC filter
thrombectomy/embolectomy
AFE incidence rate
1:20,000
AFE mortality
86%
AF composition
fetal debri
prostaglandins
leukotrines
____ indicates severity of AFE
volume of entrainment
AFE is a _____ response
immune
AFE signs/symptoms
tachycardia
cyanosis
shock
generalized bleeding
AFE phase 1
pulmonary vasospasm
hypoxia
resp acidosis
AFE phase 2
LV failure
pulm edema
uterine atony
DIC
AFE phase 3
seizure
coma
AFE treatment: pulm embolism
aspirate
max PaO2
CPR
AFE treatment: hemodynamics
aggressive fluid resuscitation
direct vasopressor (phenylephrine)
milrinone after adequate resuscitation
AFE treatment: uterine atony
oxytocin
methergine
prostaglandin
hemabate
misoprostol
AFE treatment: DIC
transfusion
AFE treatment: seizures
benzos