An unconscious adult patient is being ventilated through an esophageal obturator airway (EOA) in the emergency department. In the absence of cervical spine injury, which of the following is appropriate?
(A) Use of the EOA for airway management until the patient regains consciousness
(B) Removal of the EOA before insertion of an endotracheal tube
(C) Placement of an endotracheal tube before removal of the EOA
(D) Removal of the EOA under fiberoptic endoscopic visualization
A patient undergoes axillary block for placement of an arteriovenous shunt in the forearm. Blockade of the musculocutaneous nerve is not achieved. Injection of a local anesthetic at which of the following sites will provide the required sensory block?
(A) Between the tendon of the palmaris longus and flexor carpi radialis
(B) Body of coracpbrachialis muscle
(C) Medial to the brachial artery at the elbow
(D) Proximal to the medial epicondyle against the medial surface of the humerus
(E) Superficial to the pulse of the axillary artery
Following axillary block for insertion of an arteriovenous fistula in the forearm, a patient has pain on surgical incision. Which of the following nerves should be blocked to relieve this pain?
A 77-year-old woman is still intubated and breathing spontaneously following a total hip replacement. The muscle relaxant has been reversed. Tidal volume is 400 ml, end-tidal carbon dioxide tension is 45 mmHg, and SpO2 is 98% at an FiO2 of 1.0. On transfer from the operating table to the gurney, heart rate increases from 65 to 100 bpm and blood pressure decreases from 130/80 to 80/50 mmHg. End-tidal carbon dioxide tension is 30 mmHg and SpO2 is 94%. The most likely diagnosis is
A patient receives an emergency transfusion of three units of O, Rh-negative blood for profuse hemorrhaging. If his blood type is AB, Rh-negative, which of the following is most appropriate for continuing transfusion?
A 26-year-old woman has weakness on extension of the right knee one day after uneventful vaginal delivery under spinal anesthesia with lidocaine. The most likely cause is
(A) femoral nerve injury from thigh abduction
(B) obturator nerve injury from obstetric forceps
(C) peroneal nerve compression from the leg support
(D) saphenous nerve injury from the stirrups
(E) chemical arachnoiditis following the spinal anesthetic
A
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