Anesthesia Hub -

10 Random Questions

Intraoperative heat loss in an unclothed, undraped patient is caused primarily by

(A) conduction to colder objects
(B) convective heat loss
(C) insensible perspiration
(D) radiant heat loss to the environment
(E) respiratory tract water loss

BASIC General

Which of the following is the most important factor affecting the incidence of postoperative pulmonary complications?

(A) Age of the patient
(B) Anesthetic technique
(C) Duration of surgery
(D) Obesity
(E) Site of the operation

Following enflurane anesthesia, serum free fluoride concentration is most likely to be increased in association with long-term use of

(A) diazepam
(B) ethanol
(C) isoniazid
(D) phenobarbital
(E) phenytoin

BASIC Pharmacology & Pharmacokinetics

In patients with reflex sympathetic dystrophy affecting the arm, which of the following findings indicates a therapeutic block?

(A) Bradycardia
(B) Contralateral nasal congestion
(C) Hoarseness
(D) Increased skin temperature
(E) Ipsilateral Horner's syndrome

ADVANCED Regional & Pain

A patient sustains cardiac arrest while being mechanically ventilated. Which of the following is the most likely effect on PetCO2?

(A) Gradual increase with the duration of asystole
(B) Maintenance of the prearrest value
(C) Abrupt decrease below the prearrest value
(D) Decrease when thoracic compression is started
(E) Gradual decrease independent of the ventilator cycle

BASIC Respiratory & Critical Care

Which Mapleson breathing circuit permits the LEAST amount of fresh gas inflow to prevent rebreathing during spontaneous ventilation?

(A) A
(B) B
(C) C
(D) D
(E) E

BASIC Equipment & Physics

A patient has a heart rate of 110 bpm one year after heart transplantation. His tachycardia is most likely the result of

(A) altered baroreceptor sensitivity
(B) cardiac denervation
(C) compensation for a fixed stroke volume
(D) cyclosporine
(E) prednisone

ADVANCED Cardiac

After two hours of anesthesia with halothane 1.2% and oxygen, nitrous oxide 75% is added to the inspired gas mixture. This addition would

(A) increase the alveolar halothane and oxygen concentrations above inspired
(B) increase the alveolar halothane concentration only
(C) cause no change in alveolar gas concentrations compared with inspired
(D) decrease alveolar oxygen concentration compared with inspired
(E) decrease alveolar oxygen and halothane concentrations below inspired

A 65-year-old man with essential hypertension well controlled around 140/90 mmHg with hydrochlorothiazide is scheduled for right colectomy for carcinoma. Preoperative EKG and all laboratory values are normal except for a hematocrit of 29% and serum potassium level of 3.2 mEq/L. Central venous pressure (CVP) measured from an internal jugular catheter inserted before induction of anesthesia is 7 mmHg. Ten minutes after induction with thiopental 200 mg followed by enflurane 3% in nitrous oxide and oxygen (50% each), blood pressure decreases suddenly from 110/70 to 80/50 mmHg with heart rate unchanged at 78 bpm. CVP is now 20 mmHg and the EKG demonstrates a midjunctional rhythm. After discontinuing the enflurane, the most appropriate action would be to

(A) administer furosemide 20 mg intravenously
(B) verify proper placement of the CVP catheter
(C) administer atropine 0.4 mg intravenously
(D) administer packed erythrocytes 1 unit
(E) administer potassium 20 mEq in 250 ml of intravenous fluid over 15 minutes

ADVANCED General

Spontaneously breathing enflurane at 1 MAC causes increased

(A) airway resistance
(B) diaphragm function
(C) carbon dioxide production
(D) intercostal muscle function
(E) physiologic dead space

BASIC Pharmacology & Pharmacokinetics