Fundamentals of Nursing Q 74
A male client on prolonged bed rest has developed a pressure ulcer. The wound shows no signs of healing even though the client has received skin care and has been turned every 2 hours. Which factor is most likely responsible for the failure to heal?
A. Inadequate vitamin D intake.
B. Inadequate protein intake.
C. Inadequate massaging of the affected area.
D. Low calcium level.
Correct Answer: B. Inadequate protein intake.
A client on bed rest suffers from a lack of movement and a negative nitrogen balance. Therefore, inadequate protein intake impairs wound healing. Decubitus ulcers, also termed bedsores or pressure ulcers, are skin and soft tissue injuries that form as a result of constant or prolonged pressure exerted on the skin. These ulcers occur at bony areas of the body such as the ischium, greater trochanter, sacrum, heel, malleolus (lateral than medial), and occiput. Inadequate vitamin D intake and low calcium levels aren’t factors in poor healing for this client. A pressure ulcer should never be massaged.
Option A: Decubitus ulcer formation is multifactorial (external and internal factors), but all these results in a common pathway leading to ischemia and necrosis. Tissues can sustain an abnormal amount of external pressure, but constant pressure exerted over a prolonged period is the main culprit.
Option C: External pressure must exceed the arterial capillary pressure (32 mmHg) to impede blood flow and must be greater than the venous capillary closing pressure (8 to 12 mmHg) to impair the return of venous blood. If the pressure above these values is maintained, it causes tissue ischemia and further resulting in tissue necrosis. This enormous pressure can be exerted due to compression by a hard mattress, railings of hospital beds, or any hard surface with which the patient is in contact.
Option D: Friction caused by skin rubbing against surfaces like clothing or bedding can also lead to the development of ulcers by contributing to breaks in the superficial layers of the skin. Moisture can cause ulcers and worsens existing ulcers via tissue breakdown and maceration.