Anesthesia Hub -

10 Random Questions

A 40-year-old woman receives alfentanil 75 mcg/kg followed by an infusion of 1.5 mcg/kg/min for a one-hour cholecystectomy and cholangiogram. This regimen could be associated with each of the following EXCEPT

(A) muscle rigidity
(B) increased biliary tract pressure
(C) inadequate anesthesia
(D) postoperative respiratory depression
(E) two to four hours of postoperative analgesia

BASIC Pharmacology & Pharmacokinetics

A 36-year-old woman who undergoes peritoneal dialysis for chronic renal failure requires emergency surgical exploration for bowel obstruction. Serum creatinine concentration is 9.8 mg/dl and BUN concentration is 124 mg/dl. The most likely abnormality of coagulation is

(A) decreased euglobulin lysis time
(B) decreased platelet count
(C) prolonged activated partial thromboplastin time
(D) prolonged bleeding time
(E) prolonged prothrombin time

BASIC General

As part of a preoperative evaluation, a patient had a thallium scan showing a 'cold spot' over the left ventricle that occurs with moderate exercise and disappears at rest. This most likely indicates

(A) moderate-sized aneurysm of the left ventricle
(B) acute myocardial ischemia
(C) recent myocardial infarction
(D) old myocardial infarction
(E) Prinzmetal's variant angina

BASIC General Cardiac

Myofascial pain is an example of

(A) a central pain state
(B) neuropathic pain
(C) psychogenic pain
(D) somatic pain
(E) visceral pain

ADVANCED Regional & Pain

In a 5-kg boy with Treacher Collins syndrome who is to undergo cleft palate repair, endotracheal intubation is best accomplished with

(A) awake nasal intubation after topical anesthesia
(B) halothane anesthesia with spontaneous ventilation
(C) light isoflurane anesthesia and a muscle relaxant
(D) thiopental and succinylcholine sequence intravenously
(E) nasal intubation after administration of ketamine intramuscularly

ADVANCED Pediatric

With respect to mechanical ventilation, which of the following statements concerning the portion of tidal volume known as compression volume is true?

(A) It is calculated by dividing the volume of gas delivered to the patient by the peak pressure
(B) It does not contribute to the volume of gas entering the patient
(C) It is not included in the volume measured by a spirometer on the inspiratory limb
(D) It decreases with the addition of a humidifier to the breathing circuit
(E) It decreases with the addition of one-way valves at the Y connector of the breathing circuit

BASIC Equipment & Physics

A 30-year-old man who is undergoing laparotomy and resection of a large kidney tumor has a decrease in SpO2 from 100% to 92% and an increase in peak airway pressure from 20 to 35 cm H2O. Plateau pressure is unchanged at 18 cm H2O. Which of the following is the most likely cause?

(A) Abdominal packing
(B) Inadequate anesthesia
(C) Inadequate muscle relaxation
(D) Obstruction of the endotracheal tube
(E) Pneumothorax

BASIC Equipment & Physics Respiratory & Critical Care General

During active labor, 10 ml of bupivacaine 0.5% with epinephrine 1:200,000 is administered epidurally. Fifteen minutes later, maternal blood pressure is 70/50 mmHg and heart rate is 70 bpm; fetal heart rate is 90 bpm for 45 seconds, with loss of beat-to-beat variability. The most likely explanation for the fetal vital signs is

(A) fetal bupivacaine cardiotoxicity
(B) maternal bupivacaine cardiotoxicity
(C) maternal hypotension
(D) uterine artery vasoconstriction
(E) umbilical cord compression

ADVANCED OB

A woman with chronic obstructive pulmonary disease is extubated and minimally responsive after isoflurane anesthesia. She is receiving oxygen 6 L/min through a face mask. Respirations are 10/min, PaO2 is 68 mmHg, PaCO2 is 54 mmHg, and pH is 7.28. The most likely cause of the respiratory acidemia is

(A) blunted sensitivity to low pH in the medullary respiratory center
(B) chronic carbon dioxide retention
(C) decreased lung volume from supine positioning
(D) depression of carotid body chemoreceptors by halothane
(E) suppression of hypoxic ventilatory drive by supplemental oxygen

ADVANCED Respiratory & Critical Care

In a patient with 20% pulmonary shunt and a PaO2 of 60 mmHg, cardiac output suddenly decreases from 5 L/min to 3 L/min. Oxygen consumption is unchanged. As a result, the PaO2 will

(A) increase slightly because of decreased shunt blood flow
(B) decrease slightly because of decreased mixed venous PO2
(C) increase because of decreased affinity of hemoglobin for oxygen
(D) decrease because of an increased dead space to tidal volume ratio
(E) increase because of increased pulmonary oxygen uptake per milliliter of blood

BASIC Respiratory & Critical Care