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Test Name:
Stone Analysis
- SBMF No:
23000 - Performance Lab Name:
Manual Lab - Test Mnemonic:
STONE- - ABN:
Not required - CPT Code:
82365 - LOINC Code:
9804-6; 9795-6 - Also Known As:
Renal Calculi
Kidney Stone
Calculi - Spec Type:
Kidney stones, received whole or in pieces - Spec Container:
Plastic container with tightly fitting lid - without additives or preservative - Fasting:
No - Spec Collect:
Place entire specimen in separate plastic tube
Use plastic container for calculi too large for separate plastic tube
Indicate source on container and on requisition
Do not tape specimen to any surface
Do not transport stones in liquid (saline or formalin) - Spec Process:
Stones should be dry - Spec Store Transport:
Room temperature - Methodology:
Fourier Transform Infrared Spectroscopy (FTIR) - Use:
Determination of chemical composition of kidney stones to support therapy for the causative condition - Clinical Significance:
Urinary calculi have been recognized since the time of the ancient Egyptians when Hippocrates wrote in his famous oath advising the medical profession against the practice of cutting for stone. It was not until the early 19th century that the varying chemical composition of calculi was recognized. Although various treatments were postulated it was not until the 1950’s that the usefulness of information regarding the chemical composition of calculi was understood and more effective treatment could be fully utilized.From a 1979 survey, the incidence of renal calculi in the upper-Midwest was found to be 36 per 100,000 population in women and 124 per 100,000 in men. This is an extremely costly malady and accounts for approximately 1 of every 1000 hospitalizations in the United States. In addition, the risk of recurrence is estimated to be 50% within five years and 66% within nine years.The exact reasons for formation of calculi are not well understood. This is a complex process involving super-saturation of urine, the point at which a chemical can no longer stay in solution and begins to crystallize, and crystal growth inhibitors, components that will stop crystal from forming. There are many factors that will affect the point at which super-saturation occurs and how effective inhibitors are at retarding crystal growth. Some of these factors include urine volume, ion concentration, type of ions present, urine pH and types of inhibitors present. - Day Run:
Mon, Wed, Fri - Time Run:
As received - Time Reported:
72 hours - Test Type:
URINE
