Answer to Question 1
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.
Answer to Question 2
ANS: B
The wound is classified at the end of the surgical procedure as one of four types: (1) clean, (2) clean-contaminated, (3) contaminated, (4) dirty and infected. Surgical wounds are classified by the degree of microbial contamination or exposure that may predispose a patient to a postoperative wound infection.
Brumbies grazing on Alpine Way near Dead Horse Gap
The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Spitzer Space Telescope
Area of the hypoxic in The Gulf of Mexico’s “Dead Zone”
Increasing/decreasing Functions
International space station.