A nurse is performing safety assessments on a client in mechanical restraints as required by policy. Which action by the nurse demonstrates the ethical principle of nonmaleficence?

Choice A reason: Renal failure impairs erythropoietin production, a hormone stimulating red blood cell synthesis, leading to anemia, not an increased red blood cell count. Reduced glomerular filtration exacerbates toxin accumulation, further suppressing bone marrow activity, making an elevated red blood cell count unlikely in this condition.

Choice B reason: In renal failure, kidneys fail to excrete potassium, leading to hyperkalemia, not decreased serum potassium. Hyperkalemia can cause cardiac arrhythmias due to altered membrane potentials. A decreased potassium level is more associated with conditions like diuretic use or vomiting, not renal failure.

Choice C reason: Increased serum creatinine is a hallmark of renal failure, as kidneys cannot filter creatinine, a muscle metabolism byproduct. Elevated levels reflect reduced glomerular filtration rate, indicating kidney dysfunction. This is a reliable marker for assessing renal failure severity and progression, making it an expected finding.

Choice D reason: Renal failure typically causes hypocalcemia, not increased serum calcium, due to impaired vitamin D activation and phosphate retention, which binds calcium. Hypercalcemia is rare and may occur in other conditions like hyperparathyroidism, not renal failure, where calcium homeostasis is disrupted by kidney dysfunction.

Choice A reason: Releasing the client when behavioral control is achieved aligns with autonomy and beneficence, not nonmaleficence. While it benefits the client, it does not directly address harm prevention, which is the core of nonmaleficence. The focus is on restoring freedom, not specifically ensuring no physical harm during restraint use.

Choice B reason: Explaining release requirements promotes understanding and autonomy but does not directly prevent harm, the focus of nonmaleficence. It supports therapeutic communication but does not address the physical safety risks of restraints, such as skin breakdown or circulation issues, making it less relevant to this principle.

Choice C reason: Applying restraints based on assessment, not attitude, ensures objectivity, aligning with justice and fairness. While this prevents inappropriate restraint use, it is less directly tied to nonmaleficence, which focuses on avoiding harm like injury during restraint application, making it a secondary consideration in this context.

Choice D reason: Assuring restraints do not cause injury directly upholds nonmaleficence, the ethical principle of avoiding harm. Regular checks for skin breakdown, circulation impairment, or nerve damage prevent physical harm, ensuring safety during restraint use, making this action the most aligned with nonmaleficence in a restrained client.