A patient presents to the emergency department with nausea and severe,colicky back pain that radiates into the groin.When asked to locate the pain,he points to the right costovertebral angle region.His physical examination is unremarkable.Which of the following lab tests is most important for the diagnosis?

Question

Quizplus · Accepted Answer

The clinical presentation is suggestive of renal colic, which is commonly caused by a kidney stone. Urinalysis is the most important initial test to confirm the diagnosis, as it may reveal the presence of blood and/or crystals in the urine. Serum electrolyte levels may be useful in some cases to assess for electrolyte imbalances caused by vomiting or dehydration, but they are not as important for the diagnosis as the urinalysis. Digital rectal exam and lumbar x-ray are not typically indicated in the evaluation of renal colic.

A Patient Presents to the Emergency Department with Nausea and Severe,colicky