A drain can enhance wound healing by
a. preventing infection.
b. increasing wound dead space.
c. increasing seroma formation.
d. preventing tissue devitalization.
ANS: D
A drain enhances wound healing by preventing tissue devitalization or wound margin necrosis, eliminating fluid accumulation, obliterating dead space, allowing apposition of tissues, preventing formation of hematomas or serums, minimizing a potential source of wound contamination, decreasing postoperative pain, and minimizing scarring.
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Vestibular nuclei project to the
a. Thalamus b. Spinal cord c. Cranial nerve nuclei III, IV, and VI d. All of the above
Which of the following is an accurate statement about a stethoscope?
A. The diaphragm is the cone-shaped side of the stethoscope chestpiece. B. The bell is best at amplifying low-pitched sounds, such as vascular and heart sounds. C. The cone is the larger, flat side of the stethoscope chestpiece. D. For best results, the earpieces should be loosely placed in the ears. E. Earpieces should be angled down and to the rear for best fit.
Number 8 on the figure of the microscope are the ________ that hold the specimen slide in place.
Fill in the blank(s) with the appropriate word(s).
Sinus dysrhythmia is:
A) observed in all patients. B) an irregular sinus rhythm. C) a sign of myocardial ischemia. D) most common in hypotensive patients.