A 5-month-old infant with tetralogy of Fallot is scheduled for elective inguinal herniorrhaphy. Which of the following would require the operation to be postponed?
A 26-year-old woman comes to a pain clinic because of pain, swelling and limitation of motion in the right knee for six months following a blow to the knee. Findings on knee arthroscopy and leg roentgenograms are normal. The best trial of therapy is
(A) right paravertebral lumbar sympathetic nerve block
(B) epidural administration of a steroid
(C) intrathecal administration of an opioid
(D) tricyclic antidepressants for one month
(E) a nonsteroidal anti-inflammatory drug for five days
If the oxygen supply pressure of an anesthesia machine exceeds a set value, which of the following safety devices maintains a constant oxygen flowmeter output?
(A) Cylinder pressure regulator
(B) Fail-safe valve
(C) Flow-control valve
(D) Pipeline inlet check valve
(E) Second-stage regulator
E
Which of the following statements concerning intercostal nerve block for postoperative pain is true?
(A) Block at the midaxillary line provides analgesia for the anterior and lateral abdominal walls
(B) Blood levels of local anesthetic are higher than after an axillary block
(C) Intravascular injection is unlikely
(D) Loss of resistance assures proper needle placement
(E) Paravertebral spread is prevented by adding epinephrine to the local anesthetic solution