Correct Answer: C

Rationale: The correct term for the involuntary, rhythmic eye movements seen in the patient with multiple sclerosis is nystagmus. Nystagmus is a condition characterized by repetitive, uncontrolled eye movements that can be horizontal, vertical, or rotary. In multiple sclerosis, nystagmus can occur due to damage to the nerves that control eye movement. Vertigo (choice A) is a sensation of spinning or dizziness, not related to eye movements. Tinnitus (choice B) is a perception of noise or ringing in the ears. Astigmatism (choice D) is a refractive error of the eye, not related to involuntary eye movements.

Correct Answer: A

Rationale: The correct answer is A: Limit fluid and caffeine intake before bed. This recommendation addresses the issue of nocturia (frequent urination at night) by reducing the amount of urine produced before bedtime, therefore decreasing the need to get up during the night. Caffeine is a diuretic, so limiting its intake can also help reduce the frequency of urination. Choices B, C, and D do not directly address the underlying cause of nocturia and falling. Leaving the bathroom light on (choice B) may help with visibility but does not address the urinary problem. Kegel exercises (choice C) focus on pelvic floor muscles, not bladder muscles. Clearing the path to the bathroom (choice D) can prevent falls but does not address the urinary issue.

Correct Answer: C

Rationale: The correct answer is C: Pain on manipulation of the auricle is characteristic of otitis externa. This is because otitis externa is an infection or inflammation of the outer ear canal, causing pain and tenderness when the ear is touched or manipulated. A: Tophi on the pinna and ear lobe is characteristic of gout, not otitis externa. B: Dark yellow cerumen in the external auditory canal is common and not specific to otitis externa. D: Air bubbles visible in the middle ear are associated with otitis media, not otitis externa. In summary, pain on manipulation of the auricle is a key assessment finding in otitis externa, distinguishing it from other ear conditions.

Correct Answer: A

Rationale: The correct answer is A: Preparation of nutritious meals and avoidance of contraindicated foods. After mastoid surgery, proper nutrition is crucial for healing and recovery. Nutritious meals support the immune system and aid in tissue repair. Avoiding contraindicated foods, such as those that may cause inflammation or interfere with medications, is essential for the patient's well-being. Choices B, C, and D are not the primary focus of home care after mastoid surgery. While rest, adaptation to hearing loss, and assistance with ambulation are important, they are secondary to ensuring proper nutrition for optimal recovery in this case.

Correct Answer: A

Rationale: The correct answer is A: Ineffective Airway Clearance. In a patient with AIDS and PCP, maintaining clear airways is crucial to prevent respiratory distress and hypoxia. Pneumocystis pneumonia can cause thick secretions and mucus plugging, leading to difficulty breathing. Ensuring effective airway clearance is a priority to optimize oxygenation and prevent respiratory complications. Impaired oral mucous membranes (B) and imbalanced nutrition (C) are important considerations but not as immediate as airway clearance. Activity intolerance (D) may be a concern for the patient but ensuring adequate oxygenation takes precedence.