Calculi Analysis

Overview

  • EPIC Code:
  • LAB2491
  • Soft Test Code:
  • PS
  • Send Out Test Code:
  • 30260
Alternate Names
  • Stone Analysis
  • Stone Analysis with Image
  • Stone-A-Lyzer
Included Tests

Gross Exam; Chemical Analysis; Component 1; Component 2; Stone Weight


Clinical Significance

Stone analysis is used in determining the etiology of stones. The results are often useful in determining the cause and treatment


Specimen Collection & Preparation

Test Notes

This test will be automatically reflexed on Renal Calculi. Any other stones needing this analysis need the request spelled out on the requisition.

 

Order must include the site and/or source of collection 


Required Forms & Information

Order must include the site and/or source of collection 


Specimen Overview

In cases for multiple stones that require individual analysis:

  • each stone should be placed in its own plastic container.
  • testing must be ordered for each stone
  • each will be charged separately.

Specimen Requirements:

-OR-

Dry stone(s) collected in sterile Grey Top Plastic Container
Collection Instructions:

Do not tape the specimen to anything as tape interferes with the analytical procedure

Remove stone from urine if necessary

Do not add fixative to stone


Processing Instructions:

Minute specimens may be placed in a gelatin capsule. 

  1. Clean any blood or foreign material from the stone with water.
  2. Stone should be air dried thoroughly at room temperature for approximately 24 hours. A dry stone should not stick to the walls of the plastic container.
  3. Important:
    1. Do not tape specimen
    2. Do not send stone in formalin, surgical gel, or any transport media
    3. Avoid sending filters and cotton swabs (Q-tips)
    4. Additional processing is required for stones received with residual liquid or dampness, potentially causing delays in testing
  4. Indicate source of specimen on outside of container (e.g., left kidney, bladder, right ureter).
  5. Stones originating from sources not related to the kidney should be air-dried, then placed in a plastic tube or sterile container. 


Transport and Storage:
  • Ambient (18-24°C): 1 year

    Transport

    Note: Primary stone containers will be stored for 21 days only.

  • Refrigerated (2-8°C): 1 year
  • Frozen (-20° C or colder): 1 year

Clinical Interpretation

Reference Range:

Refer to Interpretive Pathology Report


Methodology:
  • Infrared Spectroscopy (Fourier Transform Infrared Spectroscopy), Gravimetric
Clinical Significance

Stone analysis is used in determining the etiology of stones. The results are often useful in determining the cause and treatment


Production Schedule

Sites Performed
  • Quest - Chantilly
Days Performed
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Departments
  • Sendouts - Pathology
Turn Around Time

6 to 8 days


Coding & Compliance

CPT Coding

88300, 82365