CORRECT Answers
where should monitors be placed for a mediastinoscopy - CORRECT ANSWERS right
upper extremity pulse ox or aline (due to compression of innominate artery)
left upper extremity NIBP
What age is cricothyroidotomy contraindicated? - CORRECT ANSWERS 6 years old
what psi is required to ventilate through a percutaneous cricothyroidotomy? - CORRECT
ANSWERS 50psi
what does each intrinsic muscle do?
Posterior cricoarytenoid
Thyroarytenoid arytenoid
Aryepiglottic
Cricothyroid - CORRECT ANSWERS Posterior cricoarytenoid - Abducts vocal cords
Thyroarytenoid arytenoid - Adducts vocal cords
Aryepiglottic - Closes glottic opening
Cricothyroid - Lengthens vocal cordsAor
CO2 production is how many ML - CORRECT ANSWERS 200ml/min
what are variables that are directly proportional to drug clearance - CORRECT
ANSWERS -extraction ratio & drug dose
-blood flow to clearing organ
what are histamine releasing NMB - CORRECT ANSWERS SAM
,Succs
atracurium
mivacurium
What are the three most common used pharmacological agents for treating ischemic heart
disease? - CORRECT ANSWERS Nitrates, beta-blockers, and calcium channel blockers
are the most commonly used pharmacological agents for treating ischemic heart disease.
A patient with mitral stenosis is asymptomatic with occasional mild symptoms with exertion.
Which mitral valve area is associated with these symptoms? - CORRECT
ANSWERS Patients with valve areas between 1.5 and 2.0 cm2 are usually asymptomatic
or have only mild symptoms with exertion. Critical mitral stenosis is associated with valve are
0.5-1.0 cm2 or less. Mitral stenosis is usually diagnosed when the valve area is 1.5 cm2 or less.
What is the onset of analgesia following administration of epidural morphine 5 mg? - CORRECT
ANSWERS The onset of epidural morphine is 30 to 60 minutes. The duration of analgesia
is 12 to 24 hours. Larger doses of epidural morphine are needed for analgesia. However, delayed
respiratory depression may result.
Which variable increases Minimum Alveolar Concentration (MAC)? - CORRECT
ANSWERS Hypernatremia increases MAC
You administered meperidine IV. Immediately following administration the patient developed
profound hypotension, hyperpyrexia and respiratory arrest. You expect an interaction with: -
CORRECT ANSWERS Patients receiving MAO inhibitors should not receive meperidine.
In addition to hypotension, hypertension, hyperpyrexia, and respiratory arrest, coma may result.
Interaction of alfentanil and erythromycin may lead to respiratory depression and prolonged
somnolence. Meperidine and other narcotics combined with central nervous system depressants
foster synergism that affects the respiratory and cardiac systems.
Which agent results in an increased heart rate during inhalational anesthesia? - CORRECT
ANSWERS Heart rate increases linearly with dose. There is a minimal increase in heart
rate with desflurane when using less than 1 MAC. The heart rate increases with Sevoflurane at
1.5 MAC or greater.
,Which local anesthetic is metabolized by 0-toluidine? - CORRECT ANSWERS Prilocaine
Prilocaine is the only amide local anesthetic not metabolized by P-450 microsomal enzymes.
Ester local anesthetics nesacaine is metabolized by pseudocholinesterase whereas N-methylation
and ester hydrolysis is responsible for cocaine metabolism. Mepivacaine is metabolized by P-450
microsomal enzymes.
Which local anesthetic is linked to methemoglobinemia? - CORRECT
ANSWERS Methemoglobinemia is caused by prilocaine's metabolic pathway that includes
o-toluidine
what is the dose range for cocaine? - CORRECT ANSWERS 1.5-3mg/kg
Which risk factor contributes to myocardial ischemia in a patient with aortic regurgitation? -
CORRECT ANSWERS One anesthetic goal of managing a patient with aortic
regurgitation is to maintain the heart rate toward the upper limits of normal (i.e., c. 80 to 100
beats/minute). A heart rate that is too slow or an increase in systemic vascular resistance will
increase the regurgitant volume (A and B). Tachycardia, on the other hand, will contribute to
myocardial ischemia in a patient with aortic regurgitation.
Where is the primary location of hepatic microsomal enzymes? - CORRECT
ANSWERS The primary location of hepatic microsomal enzyme activity is the hepatic
smooth endoplasmic reticulum. Microsomal enzymes are also located in the kidneys and
gastrointestinal system to a lesser extent. The majority of reactions in the small intestine involve
P450 enzymes
In which valvular disease is the pulmonary capillary wedge pressure (PCWP) an overestimation
of the left ventricular end-diastolic pressure (LVEDP)? - CORRECT ANSWERS Mitral
stenosis
Because of the abnormal transvalvular gradient in mitral stenosis, the PCWP overestimates the
LVEDP.
, Which hemodynamic event will decrease coronary perfusion pressure the most? - CORRECT
ANSWERS Coronary perfusion pressure = arterial diastolic pressure minus the LVEDP.
Any decreases in aortic pressure or increases in ventricular end-diastolic pressure will reduce
coronary perfusion pressure. Since PCWP is an indirect measure of LVEDP, an increase in
PCWP will decrease coronary perfusion pressure.
What is the maximum allowable current leakage in the operating room? - CORRECT
ANSWERS The maximum allowable current leak in the operating room is 10 uA.
What monitor alarms when a high current flow to the ground exists? - CORRECT
ANSWERS The line isolation monitor affords protection from electrical shocks in the
operating room. The isolation transformer affords isolation between the power supply in the
operating room and the ground. High efficiency particulate (HEPA) filters are used to maintain
air quality in the operating room
What humidity levels are appropriate for the operating room? - CORRECT
ANSWERS Humidity levels between 50-55% foster infection control in the operating
room. Sterile drapes may be affected by high humidity causing dampness, whereas low humidity
may accelerate movement of particulate matter.
What is the capacity of nitrous oxide in an E-cylinder? (in liters) - CORRECT
ANSWERS The capacity of nitrous oxide in an E-cylinder is 1,590 L as compared to an H-
cylinder (15,900 L). The capacity of oxygen, air, and nitrogen in an E-cylinder is 625-700 L.
How does soda lime differ from barium hydroxide lime? - CORRECT ANSWERS Soda
lime is hardened with silica, whereas barium hydroxide lime's hardness is due to its water of
crystallization. Barium hydroxide contains barium hydroxide and calcium hydroxide, but no
potassium hydroxide. The absorptive capacity of barium hydroxide is 9-18 L of CO2/100 g
granules and 14-23 L of CO2/100 g granules for soda lime.
Which of the following safety devices does not sense oxygen pressure? - CORRECT
ANSWERS Mechanical Link proportion system is a proportioning chain between the
nitrous oxide flow control and the oxygen flow control, which limits the oxygen concentration
without detecting pressures. Oxygen failure protection device is a diaphragm device dependent
upon minimum oxygen pressure to remain open. Supply failure alarm operates above a minimum
pressure threshold. Bourdon gauge is a pressure gauge.