Correct Answer: A,C,D,E

Rationale: Decreased visual acuity contributes to falls due to poor depth perception and reduced peripheral vision. Polypharmacy increases fall risk through sedative or psychotropic medication effects. Weakness and frailty are age-related changes that heighten fall risk. Chronic hypertension can cause orthostatic hypotension or cerebrovascular issues like strokes, leading to falls. Motor vehicle crashes are less common in older adults, and previous military experience is not a common risk factor for fall-related head injuries.

Correct Answer: A

Rationale: Sterile technique prevents infection in the tracheostomy site.

Correct Answer: C

Rationale: Calcium gluconate stabilizes cardiac membranes in hyperkalemia.

Correct Answer: A,D,E,F

Rationale:
Choice A: No hypersensitivity to allergens is correct because nonallergic asthma is not triggered by allergen exposure, unlike allergic asthma.
Choice D: Asthma flare-ups with NSAID administration is correct as NSAIDs like aspirin can trigger symptoms in some with nonallergic asthma.
Choice E: Persistence of manifestations is correct since nonallergic asthma symptoms are often persistent without a seasonal pattern.
Choice F: Positive response to corticosteroids is correct as corticosteroids are effective in managing nonallergic asthma.

Correct Answer: D

Rationale: Lobar pneumonia involves consolidation of an entire lung lobe, typically due to a single pathogen like Streptococcus pneumoniae. Bronchopneumonia causes patchy consolidation, empyema is pus in the pleural cavity, and severe pneumonia is a general term.