r11 Flashcards
normal fetal umbilical artery blood gas
7.2-7.3/50/20/-3
remember - it appears VENOUS!
what is carotid sinus reflex?
baroreceptor reflex - hypotension and bradycardia. tell surgeons to stop!
after, can do 1% lidocaine at bifurcation although can increase hypertension so not first choice
top 3 causes of death with blood transfusions
- TRALI 2. HTRs (non-ABO > ABO) 3. infection
what medicine can treat both hyper and hypokalemic periodic paralysis?
carbonic anhydrase inhibitors (acetazolamide)
are blood solubilities and Fa/Fi inversely or directly proportional?
inversely. the higher the ratio, the lower the blood solubility
INTRAthoracic airway obstruction
distal tracheal tumor or mediastinal mass
EXPIRATORY curve plateau
inspiratory curve is NORMAL because negative pressure generated helps keep airways open
EXTRAthoracic airway obstruction
vocal cord paralysis/dysfunction, proximal tracheal tumor, glottic strictures
INSPIRATORY curve
what muscle is most representative of abdominal paralysis?
corrugator supercilli
abd first to recover
the only cholinesterase inhibitor that crosses BBB?
physostigmine
treats anticholinergic overdose or PPX against organophosphates
volatiles effect on CMRO2, ICP, CBF
decrease CMRO2, increase CBF and ICP
why dont we like NO2 in neuroanesthesia?
increases everything! CMRO2, CBF and ICP
IV anesthetics (except ketamine) on brain function
DECREASE everything
causes of sub-ambient alarms
patient spontaneous inhalation against resistance, suction in trachea (NGT), blocked inspiratory limb during exhalation
what causes underestimation of thermodilution?
colder solution, larger bolus, large volume of fluid going in, self-measuring probe is warmer than injectate
in methemoglobinemia, what is the ONLY value that will change with supplemental o2?
PaO2
same in CO poisoning but pulse ox will falsely read 100% bc it reads the heme as the same
