Pressure ulcers are caused by:
Necrosis.
Low capillary pressure.
Increased mobility.
Extrinsic factors.
The Correct Answer is D
Choice A rationale
Necrosis is tissue death resulting from prolonged pressure, often a consequence rather than the direct cause of pressure ulcers. The primary cause is sustained pressure impairing blood flow.
Choice B rationale
Low capillary pressure does not directly cause pressure ulcers. They result from sustained external pressure exceeding capillary perfusion pressure, leading to ischemia and tissue damage.
Choice C rationale
Increased mobility actually prevents pressure ulcers by reducing sustained pressure on any one area, enhancing blood flow and tissue health. Immobility is a significant risk factor, not increased mobility.
Choice D rationale
Extrinsic factors like sustained pressure, friction, shear, and moisture contribute directly to pressure ulcer development by compromising skin integrity and blood flow, leading to tissue ischemia and damage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Encouraging adequate water intake by the client is a general recommendation for maintaining hydration but does not address the client's fear of the EEG procedure, nor does it dispel misconceptions about electrical shock.
Choice B rationale
Distracting the client's attention from the test may provide temporary relief from anxiety but does not address or correct the client's specific fear related to being electrocuted during the EEG procedure.
Choice C rationale
Informing the client that they will not experience any electrical shock is crucial in dispelling the client's fear. An EEG measures electrical activity in the brain using sensors on the scalp; it does not involve delivering electrical shocks to the client.
Choice D rationale
Informing the client that they will experience only mild electrical shock is incorrect and could increase the client's fear. An EEG does not administer any form of electrical shock to the client; it is a non-invasive and painless procedure.
Correct Answer is D
Explanation
Choice A rationale
Cerebrospinal fluid (CSF) does not produce cerebral neurotransmitters. Neurotransmitters are produced by neurons in the brain and nervous system.
Choice B rationale
CSF acts as a barrier, but its primary role is not to protect against bacteria. It provides mechanical protection and removes waste, though some antibacterial properties exist.
Choice C rationale
CSF does not act as an insulator for temperature. It primarily serves as a cushioning agent and helps maintain homeostasis, but not temperature insulation.
Choice D rationale
CSF cushions the brain and spinal cord by providing a fluid buffer that absorbs shock. It protects these structures from trauma by creating a supportive and stable environment within the cranial and spinal cavities.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.