Anesthesia Hub -

10 Random Questions

Block of the superficial cervical plexus is performed at which location?

(A) At the midposterior border of the sternocleidomastoid muscle
(B) In the interscalene groove
(C) Over the mastoid process
(D) Over the transverse process of C4
(E) Over Chassaignac's tubercle

ADVANCED Regional & Pain

A 70-kg man with ischemic heart disease is undergoing abdominal aortic aneurysm resection. At the time of infrarenal cross-clamping, 0.2-mV ST-segment depression appears on lead V5 of the ECG. Hemodynamic changes occurring at the same time are shown below. Systemic blood pressure 90/50 --> 150/90; Heart rate 80 --> 95; PAp 20/10 --> 45/24; Mean pulmonary artery occlusion pressure (mmHg) 10 --> 23; Cardiac output (L/min) 4.5 --> 3.2. Ischemia would be decreased by restoring the pre-clamp level of each of the following EXCEPT

(A) blood pressure
(B) heart rate
(C) pulmonary artery pressure
(D) pulmonary artery occlusion pressure
(E) cardiac output

ADVANCED General

Inhalation induction of anesthesia is more rapid in a 6-month-old infant than in an adult because infants have

(A) greater ratio of alveolar ventilation to functional residual capacity
(B) greater ratio of blood volume to body weight
(C) greater solubility of anesthetic in blood
(D) lower anesthetic requirement
(E) lower distribution of cardiac output to vessel-rich organs

ADVANCED Pharmacology & Pharmacokinetics Pediatric

A 30-year-old woman has an abrupt change from sinus to nodal rhythm with unchanged heart rate on ECG during induction of halothane anesthesia. Which of the following is the most likely result of this change?

(A) Decreased jugular venous pulsation
(B) Decreased mean arterial pressure
(C) Decreased systemic vascular resistance
(D) Increased cardiac output
(E) Increased pulse pressure

BASIC Pharmacology & Pharmacokinetics

Compared with an induction dose of thiopental (4 mg/kg), an induction dose of propofol (2.5 mg/kg) produces

(A) better maintenance of cerebral perfusion pressure
(B) greater inhibition of glucocorticoid production
(C) higher incidence of myoclonus
(D) less severe hypotension
(E) less severe respiratory depression

BASIC Pharmacology & Pharmacokinetics

Which of the following is the most likely beneficial effect of hyperbaric oxygen therapy in a 24-year-old scuba diver with decompression sickness?

(A) Decreased production of carbon dioxide
(B) Decreased size of gas bubbles
(C) Increased functional residual capacity
(D) Reversal of membrane pressure effects
(E) Shift of the oxyhemoglobin dissociation curve to the left

ADVANCED Respiratory & Critical Care

Each of the following is a complication of celiac plexus block with 0.5% lidocaine 40 ml EXCEPT

(A) hematuria
(B) ileus
(C) postural hypotension
(D) retroperitoneal hematoma
(E) weakness of hip flexors

ADVANCED Regional & Pain

If a patient with excessive bleeding during exploratory laparotomy has a normal activated clotting time, the LEAST likely cause of the bleeding is

(A) antithrombin III deficiency
(B) dilutional thrombocytopenia
(C) fibrinolysis
(D) administration of heparin 5000 units
(E) preoperative ingestion of aspirin

BASIC General

A 48-year-old woman underwent a posterior fossa craniotomy in the sitting position. Monitoring included precordial Doppler, arterial blood pressure, central venous pressure (CVP), and urine output. Furosemide was used intraopera-tively for cerebral decompression, and the operation was uneventful. In the recovery room, she was awake with stable vital signs when the CVP suddenly increased from 6 to 25 mmHg without any change in blood pressure. Shortly thereafter, premature ventricular contractions are noted. After administering lidocaine 1 mg/kg intravenously, the most appropriate action is to

(A) position the patient head down, right side up and aspirate the CVP catheter
(B) withdraw the CVP catheter 5 cm
(C) infuse potassium chloride rapidly
(D) administer furosemide
(E) ask the neurosurgeon to reevaluate the patient immediately

ADVANCED Neuro

Which of the following will result in the largest change in oxygen content?

(A) Increased hemoglobin (Hgb) concentration from 10 to 15 g/dl
(B) Increased PaO2 from 40 to 50 mmHg (Hgb 15 g/dl)
(C) Increased PaO2 from 60 to 70 mmHg (Hgb 15 g/dl)
(D) Increased P50 of Hgb from 27 to 37 mmHg (Hgb 15 g/dl)
(E) Increased pH from 7.20 to 7.40

BASIC General