1. Right Answer: A
Explanation: (A) Vitamin C (ascorbic acid) is essential in promoting wound healing and collagen formation. (B) Vitamin B1 (thiamine) maintains normal gastrointestinal (GI) functioning, oxidizes carbohydrates, and is essential for normal functioning of nervous tissue. (C) Vitamin D regulates absorption of calcium and phosphorus from the GI tract and helps prevent rickets. (D) Vitamin A is necessary for the formation and maintenance of skin and mucous membranes. It is also essential for normal growth and development of bones and teeth.
2. Right Answer: D
Explanation: (A) This meal choice provides more of the vitamins A, D, and K than of vitamin C. (B) This meal choice provides more of the vitamins A, B12, and D than of vitaminC. (C) This meal choice provides more of the vitamins A, B1 (thiamine), niacin, and microminerals than of vitamin C. (D) This meal choice provides foods rich in vitamin C, which are essential in tissue healing.
3. Right Answer: A
Explanation: (A) Skeletal traction is the application of traction directly to bone with the use of pins and wires or tongs for the purpose of providing a strong, steady, continuous longitudinal pull on the bone. It is indicated for preoperative immobilization and positioning of hip and femur fractures. (B) A type of skeletal traction (balanced suspension with a Thomas splint and Pearson attachment) uses a sling to support the extremity, but it also uses weights to provide a strong, steady continuouspull on the extremity. A sling is used instead of pins. (C) Pelvic traction provides an intermittent pull over the pelvis and bone, whereas skeletal traction is continuous. Pelvic traction does not use pins. (D) Skeletal traction uses weights at the end of the bed to provide a continuous pull on long bones. Weights are not applied to both ends of the bed.
4. Right Answer: B
Explanation: (A) Exudate (moist, active drainage) is a clinical sign of wound infection. (B) Crust (dry, scaly) is part of the normal stages of wound healing and should not be removed from around the pin site. It usually sloughs off after the underlying tissue has healed. (C) Edema (swelling) is a clinical sign of wound infection. (D)Erythema (redness) is a clinical sign of wound infection.
5. Right Answer: C
Explanation: (A) Cystoscopy is an endoscopic procedure that uses an instrument (a cystoscope) to visualize the internal bladder and ureter structures and to capture and remove an obstructing stone. (B) Kidney, ureter, bladder x-ray is used to outline gross structural changes in the kidneys, ureter, and bladder and will determine the general location of a stone. (C) An intravenous pyelogram with excretory urogram is used to visualize the kidneys, kidney pelvis, ureters, and bladder. This procedure is used specifically to determine whether urethral obstruction is partial or complete; it shows the exact location of the stone and dilation of the ureter above the stone. (D) Ureterolithotomy is a surgical procedure in which the ureter is incised and the stone is manually removed because the stone is unable to pass through the ureter independently.
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