Exam Flashcards
Which nerve is at risk of injury when a face mask strap is used?
7
facial
What is the internal diameter of an anesthesia face mask connector?
22 mm
What observational assessment is the best means for assessing effectiveness of bag-and-mask ventilation?
chest rise
condensation
compliance
What is the appripriate starting rate for infusion of nitroglycerin?
0.5 mcg/kg/min
Which cardiac dysrhythmia most often produces inability of an NIBP machine to obtain systolic and diastolic blood pressure measurements?
A-fib
Why is a reservoir bag included as a component of an anesthesia breathing circuit?
Peak inspiratory flow demands
Below what MAC level will sevoflurane not increase heart rate?
MAC > 1.5
What prior surgical procedures represent a contraindication for IV catheter placement in an upper extremity?
For NIBP measurement in an upper extremity?
mastectomy w/ lymph node dissection
AV fistula
Comparing blood pressure measurements taken on an upper arm and the ipsilateral calf, how will the systolic and diastolic values compare?
If recumbant, systolic is increased
diastolic is decreased
Name one contraindication to hetastartch administration.
coagulopathies if delivery > 1 L / 24 hours
another is allergy reaction
What blocks 60-cycle interference?
band pass filter
When performing bag-and-mask ventilation in an adult, which fingers must be applied only to the bony rim of the mandible?
3 and 4
Time constant of gases and liquids
volume
flow
If IV catheter is in the SVC, where is it?
superior vena cava, joining of the left and right brachiocephalic venins to the right atrium
A 200 lb patient is breathing oxygen 2 L/min, air 3L/min, and sevoflurane 2.4% via ETT.
Vt is 600 ml , resp = 10 breaths/minute, FRC is 4000 ml
What is the time constant?
FRC
VA= (VT-VD)* RR
4000
(600-200)*10
1 min
If time constant = 1 minute, what percent change in inspired sevoflurance will have occurred at the end of the time comstant?
100 - 36.78 = 63%
How many time constants are required for a 95% change?
3 time constants
For a safe, cost effective preparation for an elective case, how many endotracheal tubes should be opened?
1
A 29 y/o woman is schedules to undergo BTL. What is BTL?
bilateral tubal ligation
What is the osmolarity of saline 3%?
308/0.9 * 3 = 1027 mOsm
What are the complications associated with excess administration of saline IVFs?
edema
pulmonary edema
electrolyte abnormalities
What are contraindications to administering lactated ringer’s solution?
low pH
lowers pH so causes acidosis
has Ca, lactate, K, Cl, Na
hypotonic at 273 mOsm/L
What are contraindications to using a NIBP cuff?
extremities with vascular abnormalities
dialysis shunts
IV lines
How do you size a BP cuff?
Width is 40% of arm circumference
How do you detect oxygen flow of a hand-operated, self-inflating bag?
listen at the distal end
What is the concentration of epinephrine?
1g/100,000ml
10 mcg
What is the I, II, III, and IV Korotkoff sounds?
I = snap
II = murmur
III = thump
IV = muffle
What is an hypo-osmolar crystalloid IV solution?
LR is slightly above
During bag-mask verntilation, stay below what peak airway pressure to avoid insufflating the stomach?
20 cm H20
What is the affect of hypothermia on non-depolarizing neuromuscular blockers?
prolongs the blockade by decreasing metabolism
What is the osmolarity of NS 3%?
308/0.9 * 3
1027mOsm
What location is prone to infection regarding CVP catheters?
subclavian
What does the acronym SVC mean?
superior vena cava
What is the starting dosage rate of IV NTG infusion?
0.5 mcg/kg/min
What is the distribution of LR 30 minutes after infusion?
1/3 remains in the plasma after 30 minutes
Physical exam findings that would be a clue for difficult bag-mask ventilation?
edentulous
beard
micrognathism
Reasons you are unable to bag-mask ventilate:
obstructing
bad seal
How do you perioperatively manage a patient with pulmonary TB?
look up
How do you store drug vials?
look up
How do you increase IVF flow rate through an 18 gauge IV catheter?
raise the bag height
What is the lung capacity involved in preoxygenation?
FRC
During induction of anesthesia, what breath-to-breath end point are you trying to achieve with bag-mask ventilation?
good Vt
What is the correct action to be taken when a patient is being seen in preop clinic prior to elective knee arthroscopy is suspected of having active pulmonary tuberculosis?
delay the case until it clears
Why is a reservoir bag included as a component of an anesthesia breathing circuit?
Meets peak inspiratory flow requirements
Name the veins appropriate for insertion of a CVP catheter and list site-specific considerations (if any)?
femoral- DVT
EJV- hydrothorax
IJV- hydrothorax
cephalic
subclavian- PTX
basilic
What attribute of CVP catheters is associated with increasing risk of infection?
number of lumens
For vascular access procedures, a safe, effective alternative preparation for an iodine allergic patient would be?
chlorhexadine 4%
Following IV injection of muscle relaxant, what is your temporal end-point for intubation during an RSI?
look up
Which muscle relaxant would you select in order to provide neuromuscular blockage during rapid-sequence induction of a patient with ESRD?
K normal: SUX, redose with CIS
K elevated: ROC, redose with CIS
If aseptic technique is employed consistently, how long can a multidose drug vial continue to be used?
until expiration date
An epinephrine infusion is connected to the main IVF tubing 4.25 ml from the IV catheter’s entry point into a CVP catheter. IVF flow rate is 120 ml/hr. When the epi infusion rate is decreased, how long will it take for there to be a 95% change in epi concentration in the SVC?
t = V / flow rate
4.25 ml / 2 ml/min = 2.125 min
What is the Sellick maneuver?
RSI - cricoid pressure
What IVFs contain magnesium?
Normosol
Plasmalyte 3mEq/L
What are communicable disease risks for pregnant personnel?
look up
Cytomegalovirus?
Where is the basilic vein?
medial side
Where is the cephalic vein?
lateral side
NIBP monitors display 3 blood pressure parameters: systolic, diastolic, and mean. Explain how each value is determined by the device. What will most likely happen to the reported BP values when the following conditions exist?
HTN
hypotension
sinus tachycardia
atrial fibrillation
ventricular fibrillation
HTN- get all 3
hypotension- get mean
sinus tachycardia- only mean
atrial fibrillation- only mean
ventricular fibrillation- get nothing
What electrolytes are found in LR?
Na
Cl
K
Ca
Lactate
What electrolytes are found in Plasma-Lyte?
Na
Cl
K
Mg
Name the types of crystalloids:
D5W
0.9 Sodium Chloride
LR
Plasma-Lyte
Name the types of colloid:
Hetastarch
Dextran
Albumin
3% Sodium Chloride
5% Sodium Chloride
When do we replace fluids?
hourly requirements
insensible loss through open wound
“third spacing”
blood loss
What are contraindications for placing peripheral IVs? (6)
massive edema
burns or injuries
abdominal trauma
areas of infection
indwelling fistula
side of mastectomy