Anesthesia Hub -

10 Random Questions

Diffuse microvascular bleeding is noted in a patient who has received 25 units of whole blood for a liver resection. Platelet count is 40,000/mm3, prothrombin time is 18 sec, activated partial thromboplastin time is 54 sec, and serum fibrinogen concentration is 60 mg/dl. The most likely cause of the bleeding is

(A) abnormal platelet function
(B) citrate toxicity
(C) depressed levels of factors V and VIII
(D) dilutional thrombocytopenia
(E) disseminated intravascular coagulation

BASIC Transfusions & Fluids

The principal rationale for the use of warmed humidified inspired anesthetic gases in children is to

(A) decrease postoperative respiratory complications
(B) decrease postoperative shivering
(C) preserve ciliary function
(D) prevent dehydration
(E) prevent evaporative heat loss

ADVANCED Equipment & Physics Pediatric

Which of the following is most likely to increase hepatic blood flow during general anesthesia?

(A) Addition of positive end-expiratory pressure
(B) Discontinuation of isoflurane and administration of enflurane
(C) Increased PaCO2
(D) Moderate controlled hypotension
(E) Subarachnoid administration of morphine

BASIC General

A 70-kg, 22-year-old man who is unconscious after a closed head injury is to undergo emergency splenectomy. He is anesthetized with thiopental, given pancuronium for paralysis, and started on nitrous oxide and oxygen 50% each with controlled ventilation (tidal volume 700 ml, rate 10/min). Pulse is 70 bpm, blood pressure is 160/100 mmHg, PaO2 is 65 mmHg, PaC02 is 45 mmHg, and pH is 7.30. In adjusting the ventilator at this time, which of the following is most appropriate?

(A) Add 10 cmH2O positive end-expiratory pressure (PEEP), increase respiratory rate to 14/min
(B) Add sufficient PEEP to increase PaO2 to 80 mmHg
(C) Add 10 cmH2O PEEP, increase FlO2 to 1.0
(D) Increase tidal volume to 1000 ml, increase FiO2 to 1.0
(E) Increase tidal volume to 1200 ml, decrease respiratory rate to 8/min

BASIC Respiratory & Critical Care

Desflurane at a stable alveolar concentration of 7%

(A) causes bradycardia
(B) decreases cerebrovascular resistance
(C) degrades in soda lime
(D) increases systemic vascular resistance
(E) stimulates the respiratory centers

BASIC Equipment & Physics Pharmacology & Pharmacokinetics

Which of the following factors is LEAST predictive of postoperative cardiac complications?

(A) Congestive heart failure
(B) Major vascular surgery
(C) Premature ventricular contractions
(D) Preoperative hypertension
(E) Recent myocardial infarction

BASIC General

The most sensitive means of detecting venous air embolism is

(A) precordial Doppler stethoscope
(B) transesophageal echocardiography
(C) end-tidal carbon dioxide measurement
(D) pulmonary artery pressure measurement
(E) central venous pressure measurement

ADVANCED Equipment & Physics Neuro

Which of the following is an effect of ritodrine?

(A) Anisocoria
(B) Hypocalcemia
(C) Hypoglycemia
(D) Hypokalemia
(E) Urinary retention

ADVANCED OB

The two E oxygen cylinders on an anesthesia machine have pressure readings of 1100 psi each. At an oxygen flow of 3 L/min, there will be sufficient oxygen for approximately

(A) 2.5 hours
(B) 3.5 hours
(C) 5.5 hours
(D) 7 hours
(E) 8 hours

BASIC Equipment & Physics

Which of the following statements about patient-controlled analgesia using opioids is true?

(A) It is not associated with respiratory depression
(B) It obviates loading doses
(C) It requires a background opioid infusion to be effective
(D) It requires intravenous administration to be effective
(E) It requires less drug than intramuscular dosing for similar analgesia

ADVANCED Regional & Pain