How does the size of the ultrasound head affect the intensity of an ultrasound intervention?
What will be an ideal response?
A smaller US head will decrease the effective radiating area (ERA) so at any given power the ultrasound intensity will be increased since it is being distributed over a smaller area (i.e., 10 watts delivered from a sound head with a 10 cm2 ERA creates an intensity of 1 W/cm2; the same wattage distributed over an ERA of 5 cm2 creates an intensity of
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Good hand mechanics when applying ischemic compression with the thumb include:
A) Thumb and wrist joints in straight alignment B) Thumb abducted C) 90-degree angle between thumb and hand D) Wrist flexed and thumb abducted
Which of the following types of epithelial tissue is stretchy and variably shaped?
a. Columnar b. Cuboidal c. Squamous d. Transitional
What is the best approach to handling patient cancellations?
A. send the patient a letter pointing out that he canceled a necessary appointment B. attempt to schedule another patient in the cancellation slot C. encourage the physician to take the time off D. schedule other activities in those cancellations slots
All of the following are interstitial lung diseases EXCEPT:
a. asbestosis. b. sarcoidosis. c. Staphylococcus. d. silicosis.