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Cathartic Laxatives Profile, Stool

Reporting Name

Cathartic Laxatives Profile, F
Seattle Children's Hospital Note:

Clinical System Name: Miscellaneous Test


Specimen Required


10 g of stool. No preservative. Send specimen in a acid-washed or trace metal-free plastic container, MML supply T656. Send specimen refrigerated.


Specimen Type

Fecal

Specimen Minimum Volume

10 mL stool liquid or 10 g stool solid

Specimen Stability Information

Specimen Type Temperature Time
Fecal Refrigerated (preferred) 30 days
  Ambient  30 days
  Frozen  30 days

Day(s) and Time(s) Performed

Varies, Monday, Tuesday, Wednesday and Friday

Performing Laboratory

NMS Labs

Method Name

Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

Reference Values

Reporting limit determined each analysis

 

Magnesium (mg/g)

 

Magnesium concentrations in stool water above the normal levels of 0.7-1.2 mg/mL have been indicative of surreptitious abuse of magnesium containing laxatives.

 

NMS Labs Calculated Normal: approximately 0.5-10 mg/g (Based on the reported range of magnesium eliminated per day in stool and the range of stool mass per day in adults).

Not for clinical diagnostic purposes.

 

 

Phosphorus (mg/g)

 

Phosphorus concentration in stool water averaged 1.8 ± 0.3 mg/mL (ranged from 0.3-4.2 mg/mL) following administration of 105 mmol of sodium phosphate.

 

NMS Labs calculated normal: approximately 1.4-22 mg/g (Based on the reported range of phosphorus eliminated per day in stool and the range of stool mass per day in adults).

Not for clinical diagnostic purposes.

CPT Code Information

83735-Magnesium

84100-Phosphorus Inorganic (Phosphate)

LOINC Code Information

Test ID Test Order Name Order LOINC Value
FCLPS Cathartic Laxatives Profile, F In Process

 

Result ID Test Result Name Result LOINC Value
Z1336 Magnesium 29911-5
Z1350 Reporting Limit 19147-8
Z1337 Phosphorus 10884-5
Z1351 Reporting Limit 19147-8

Reject Due To

Hemolysis

NA

Thawing

Warm OK; Cold OK

Lipemia

NA

Icterus

NA

Other

NA