Author Question: Power is a measure of which of the following? a. Mechanical energy b. Gravitational potential ... (Read 53 times)

naturalchemist · **on:** Jul 16, 2018

Power is a measure of which of the following?

a. Mechanical energy
b. Gravitational potential energy
c. The rate at which work is being performed
d. The rate at which atoms and molecules move

Question 2

The diagnosis of RSV is most often confirmed with a sample obtained by:

a. tracheal suctioning.
b. venipuncture.
c. arterial blood sampling.
d. urine specimen.
e. nasopharyngeal aspirate.

Question 3

Which of the following is no longer recommended in the management of a patient with RSV infection?

a. Palivizumab (Synagis)
b. Bulb suctioning of the nares
c. Nebulized hypertonic saline
d. Ribavirin (Virazole)

pocatato · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: C
Power is a measure of the rate at which work is being performed. The formula P = W/J, where W = watts and 1 watt is equal to 1 J/s, expresses this. Joules are the international standard for ex-pressing energy and work.

Answer to Question 2

E
RSV is most commonly diagnosed with commercially available antigen assay tests, typically ordered as an RSV enzyme immunoassay (RSV-EIA). This test requires a nasopharyngeal aspirate or lavage sample, often obtained in the physician office or emergency department. The test is a rapid screen and is usually reliablebut a negative RSV-EIA does not rule out RSV.

Answer to Question 3

D
Although ribavirin was widely used when it was first introduced, the routine use of nebulized ribavirin (Virazole) in infants and children with RSV is no longer recommended. The efficacy of ribavirin in this population has not been proven. In addition, ribavirin is expensive, requires special equipment, adds technical risk to ventilator care when used in line, and is associated with occupational exposure concerns.