What is a clinical manifestation of right-sided heart failure?

Choice A reason: Hyperventilation leads to respiratory alkalosis, causing symptoms like dizziness, paresthesia, or tetany due to decreased carbon dioxide levels. It does not cause renal colic, which involves severe, spasmodic flank pain typically from ureteral obstruction. This makes hyperventilation an incorrect cause for the patient’s acute pain presentation.

Choice B reason: Nephrolithiasis, or kidney stones, is the most likely cause of renal colic in a young male. Stones obstruct the ureter, triggering severe, intermittent flank pain radiating to the groin, often with hematuria or nausea. This matches the described acute pain, making nephrolithiasis the correct diagnosis for the patient’s symptoms.

Choice C reason: Urinary tract infections may cause dysuria, frequency, or suprapubic discomfort but rarely produce the severe, colicky flank pain characteristic of renal colic. While infections can coexist with stones, the primary presentation of acute, severe pain points to nephrolithiasis, making this a less likely primary cause.

Choice D reason: Trauma can cause renal pain or hematuria but typically presents with a history of injury and signs like bruising or hemodynamic instability. Renal colic’s hallmark is spontaneous, severe pain without trauma history, making trauma an unlikely cause for this patient’s acute presentation.

Choice A reason: Nasal mucosa is a portal of entry for cold viruses, not the primary source of spread. Sneezing propels virus-laden droplets, infecting others, making it the greatest spread mechanism, so this is incorrect for the source.

Choice B reason: Conjunctival surfaces can be an entry point but are not the main source of spread. Sneezing disperses viruses widely through respiratory droplets, driving transmission, so this is incorrect for the greatest source.

Choice C reason: Sneezing is the greatest source of cold virus spread, as it releases aerosolized droplets containing viruses, infecting others via inhalation or surface contact. This is the primary transmission mode, making it the correct choice.

Choice D reason: Fingers spread viruses via fomites, but sneezing generates more widespread droplet transmission. Hand contact is secondary to respiratory spread, so this is incorrect for the greatest source of cold virus spread.