Calculus; quantitative analysis, chemical
CPT4 code
Name of the Procedure:
Calculus; quantitative analysis, chemical
Common name(s): Kidney stone analysis
Technical or medical terms: Quantitative chemical analysis of renal calculi, Lithiasis assay
Summary
Quantitative chemical analysis of kidney stones is a laboratory procedure used to determine the composition of a kidney stone. This information helps in understanding the cause of stone formation and guiding treatment and prevention strategies.
Purpose
This procedure addresses the problem of kidney stones (renal calculi) by analyzing their chemical makeup. The goal is to identify the specific substances that make up the stone, which can inform dietary and medical strategies to prevent future stones.
Indications
- Recurring kidney stones
- Single kidney stone event with a high risk of recurrence
- Unusual or large kidney stones
- Persistent symptoms despite treatment for kidney stones
Preparation
- No specific preparation is required for the patient.
- The patient needs to provide a kidney stone sample, which may involve straining urine to collect the stone or stones.
Procedure Description
- Collection: The patient collects and submits a kidney stone sample.
- Laboratory Analysis: The stone is cleaned, dried, and weighed.
- Chemical Breakdown: The stone is analyzed using various techniques (such as infrared spectroscopy or X-ray diffraction) to identify its chemical components.
- Reporting: A detailed report of the stone's composition is generated and sent to the treating physician.
Tools, equipment, or technology used:
- Infrared Spectroscopy
- X-ray Diffraction
- Other advanced chemical analysis tools
Anesthesia or sedation details: Not applicable
Duration
The analysis process typically takes a few days to a week from sample submission to report generation.
Setting
The procedure is performed in a specialized laboratory.
Personnel
- Medical laboratory technologists
- Clinical chemists
- Urologists (for interpretation of results)
Risks and Complications
This is a non-invasive procedure with no direct risks to the patient. Possible complications: None
Benefits
- Identifies the chemical composition of kidney stones.
- Helps in tailoring prevention strategies to reduce the risk of future stones.
- Provides insight into metabolic disorders that may contribute to stone formation.
Recovery
No recovery time is needed as this is a non-invasive procedure. Patients can continue their normal activities without restrictions.
Alternatives
Other treatment options:
- Direct treatment of kidney stones without chemical analysis.
- Imaging tests to identify stone type (less precise than chemical analysis).
Pros and cons of alternatives:
- Imaging tests are faster but less specific.
- Direct treatment without analysis may not prevent recurrence.
Patient Experience
The patient experiences no discomfort from the analysis itself, as it involves only the submission of a stone sample. They might require guidance on how to collect and submit the stone, often including straining urine to capture the stone.