Which of the following are true of the harmonic scalpel?
1. uses ultrasonic sound waves
2. simultaneously cuts tissue and seals blood vessels
3. minimizes collateral tissue damage
4. vibrating tip breaks up tissue and vacuums it away

a. 1,2, and 3 only
b. 1, 2, and 4 only
c. 1,3, and 4 only
d. 2,3, and 4 only

Which of the following must be done to the lsovue to avoid a misdiagnosis of gallstones during a cholangiogram? a. do not inject the lsovue until the gallbladder is removed. b. mix 10 cc of saline with 20 cc of isovue. c. ensure that there are no air bubbles in the syringe before injection. d. keep the isovue chilled.