EBQ:Hematuria in Renal Colic: Difference between revisions
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==Population== | ==Population== | ||
* Patients presenting to single institution with suspected renal colic who underwent both unenhanced helical computed tomography (CT) and microscopic urinalysis testing within a 24-hour period | |||
===Patient Demographics=== | ===Patient Demographics=== | ||
===Inclusion Criteria=== | ===Inclusion Criteria=== | ||
Line 39: | Line 42: | ||
==Outcomes== | ==Outcomes== | ||
===Primary Outcome=== | ===Primary Outcome=== | ||
* The sensitivity of blood on the urinalysis for CT-confirmed renal colic was 84% | |||
* The specificity of blood on the urinalysis for CT-confirmed renal colic was 48% | |||
* The positive predictive value of blood on the urinalysis for CT-confirmed renal colic was 72% | |||
* The negative predictive value of blood on the urinalysis for CT-confirmed renal colic was 65% | |||
===Secondary Outcomes=== | ===Secondary Outcomes=== | ||
* 62% of patients had CT-evidence of stone or recently passed stone | |||
* 31% of patients had completely negative CT scans | |||
* 7% of patients had significant alternative diagnoses | |||
===Subgroup analysis=== | ===Subgroup analysis=== | ||
Using higher threshold for positive urinalysis (10 or more RBC/mL urine): | |||
* The sensitivity of blood on the urinalysis for CT-confirmed renal colic was 81% | |||
* The specificity of blood on the urinalysis for CT-confirmed renal colic was 51% | |||
* The positive predictive value of blood on the urinalysis for CT-confirmed renal colic was 73% | |||
* The negative predictive value of blood on the urinalysis for CT-confirmed renal colic was 62% | |||
==Criticisms & Further Discussion== | ==Criticisms & Further Discussion== | ||
==Funding== | |||
Not disclosed, and authors do not report any conflicts of interest | |||
==See Also== | |||
*[[Urolithiasis]] | |||
==Sources== | ==Sources== |
Latest revision as of 04:12, 28 August 2019
incomplete Journal Club Article
Luchs J. et al.. "Utility of hematuria testing in patients with suspected renal colic: correlation with unenhanced helical CT results". Urology. 2002. 59(6):839-42.
PubMed
PubMed
Clinical Question
How accurate is urinalysis for detecting ureteral stones?
Conclusion
The presence or absence of blood on urinalysis cannot be used to reliably determine which patients have ureteral stones.
Major Points
Urinalysis compared to noncontrast CT (gold standard):
Sensitivity 84%
Specificity 48%
Study Design
Retrospective chart review of 950 patients who had a formal microscopic urinalysis within 24 hours of undergoing a non-contrast helical CT.
Population
- Patients presenting to single institution with suspected renal colic who underwent both unenhanced helical computed tomography (CT) and microscopic urinalysis testing within a 24-hour period
Patient Demographics
Inclusion Criteria
Exclusion Criteria
Interventions
Workup and treatment according to treating physician (retrospective review).
Outcomes
Primary Outcome
- The sensitivity of blood on the urinalysis for CT-confirmed renal colic was 84%
- The specificity of blood on the urinalysis for CT-confirmed renal colic was 48%
- The positive predictive value of blood on the urinalysis for CT-confirmed renal colic was 72%
- The negative predictive value of blood on the urinalysis for CT-confirmed renal colic was 65%
Secondary Outcomes
- 62% of patients had CT-evidence of stone or recently passed stone
- 31% of patients had completely negative CT scans
- 7% of patients had significant alternative diagnoses
Subgroup analysis
Using higher threshold for positive urinalysis (10 or more RBC/mL urine):
- The sensitivity of blood on the urinalysis for CT-confirmed renal colic was 81%
- The specificity of blood on the urinalysis for CT-confirmed renal colic was 51%
- The positive predictive value of blood on the urinalysis for CT-confirmed renal colic was 73%
- The negative predictive value of blood on the urinalysis for CT-confirmed renal colic was 62%
Criticisms & Further Discussion
Funding
Not disclosed, and authors do not report any conflicts of interest