. What is the predominant sound a nurse expects to hear when percussing a patient's abdomen?

Rheumatoid arthritis is a chronic, systemic autoimmune disease characterized by synovial hypertrophy and pannus formation. It typically presents with symmetrical joint involvement and prolonged morning stiffness that improves with activity. The pathophysiology involves the release of cytokines like TNF-alpha, leading to joint destruction.

A. Gout: Gout is a metabolic disorder involving the deposition of monosodium urate crystals in the joint space. It typically presents as an acute, extremely painful, monoarticular inflammation, often in the great toe. It does not cause symmetrical morning stiffness in the wrists.

B. Rheumatoid arthritis: Symmetrical involvement of small joints and stiffness lasting over an hour are hallmark features of this inflammatory arthritis. The prolonged duration of stiffness differentiates it from non-inflammatory conditions. This clinical presentation is highly specific for the diagnosis.

C. Fibromyalgia: This is a chronic pain syndrome characterized by widespread musculoskeletal tenderness and fatigue. While it can cause morning stiffness, it does not involve the objective joint swelling or inflammatory changes found in the wrists and fingers.

D. Osteoarthritis: This is a degenerative joint disease where morning stiffness typically lasts less than 30 minutes. It commonly affects weight-bearing joints and the distal interphalangeal joints. It is characterized by mechanical wear rather than the systemic inflammatory swelling seen here.

Safe performance of the Romberg test requires the nurse to stand nearby to prevent falls due to orthostatic instability. The patient is instructed to minimize base of support by placing the feet together. Observing the degree of swaying helps the clinician determine if the balance deficit is visual, vestibular, or proprioceptive in origin.

A. "Walk heel to toe across the room.": This instruction describes tandem gait testing, which evaluates cerebellar function and overall coordination during locomotion. While it tests balance, it is a dynamic assessment rather than the static postural assessment known as the Romberg test. It requires different neurological pathways for execution.

B. “Run the heel of foot down the opposite shin.": This maneuver is the heel-to-shin test, used primarily to assess appendicular coordination and cerebellar integrity. It is performed while the patient is supine or sitting. It checks for dysmetria rather than the static equilibrium measured by standing with eyes closed.

C. "Pronate and supinate the hands rapidly.": This instruction tests for dysdiadochokinesia, which is the inability to perform rapid alternating movements. It is a specific sign of cerebellar dysfunction. It does not involve standing balance or the integration of proprioceptive and visual cues required for the Romberg test.

D. "Stand with your feet together with eyes closed.": This is the standard procedural instruction for the Romberg test. It removes visual input, forcing the brain to rely on vestibular and proprioceptive signals to maintain an upright posture. This specific position allows the nurse to observe for pathological swaying or loss of balance.