In formulating the nursing care plan for a client diagnosed with Parkinson's disease, which nursing problem has the highest priority?

Choice A rationale: Impaired physical mobility is a significant concern in Parkinson's disease due to bradykinesia and tremors. However, it does not pose an immediate threat to life when compared to potential airway and respiratory complications. Choice B rationale: Aspiration is the highest priority according to the ABC (Airway, Breathing, Circulation) framework. Parkinson's causes dysphagia and impaired laryngeal reflexes, making silent aspiration and subsequent pneumonia a life-threatening risk for the client. Choice C rationale: Constipation is common due to decreased GI motility and side effects of dopaminergic medications. While it causes discomfort and potential impaction, it is a physiological need that ranks lower than respiratory safety. Choice D rationale: Self-care deficits in hygiene and dressing affect the client's quality of life and independence. In the hierarchy of care, these functional limitations are addressed only after the client's physical safety and airway are secured.