HemoQuant, Fecal


Abbrev Code:HEQ   
Order Code:LAB1077Order Name:HemoQuant, Fecal
Synonyms:Mayo HQ, LHE LAB695; K, Fecal; K Stool; Potassium, Stool
Methodology:Fluroescence quantitation
CPT Codes: 84126 x1, 84126 x1
Turnaround Time:Specimens are sent to the reference laboratory Mon-Sat; results are reported within 4 days.
Compliance:

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.


Collection Instructions

Specimen:Stool, random
Optimal Volume:1 g stool from a single defecation, REFRIGERATED.
Container:Plastic leakproof container, sterile
Patient Preparation:Patient should refrain from ingesting red meat and aspirin-containing products, e.g. Exedrin, aspirin, for 3 days prior to specimen collection.
Causes for Rejection:Gross hemolysis


Processing and Shipping

Specimen Processing:No processing necessary. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Stability:7 days at room temperature or refrigerated; n/a for frozen.
Test Performed at or Referral Lab Lab Sendouts  (Mayo Medical Laboratories)
Referral Lab number:HQ


Interpretive

Reference Range:
Normal ≤ 2.0 mg total hemoglobin/g feces
Marginal 2.1-4.0 mg total hemoglobin/g feces, not
clinically significant if red meat, warfarin, or
aspirin was ingested 72 hours prior to collection
Elevated >4.0 mg total hemoglbing feces
Interpretive:
  • Elevated levels are an indicator of the presence of blood in the feces, either from benign or malignant causes.
  • The elevated prophyrins of lead intoxication, erythrocytic protoporphyria and variegate prophyria may raise HemoQuant values in the absence of gut bleeding.
  • Recent studies have indicated that cancerous lesions in their early stages often do not bleed or bleed only intermittently.
Use:
  • Detection of blood in feces.
  • Evaluation of iron deficiency.
  • Detection of bleeding as a complication of anticoagulant therapy and other medication regimens.


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