Alberta Precision Laboratories

--- Query Results ---

Organization:

Alberta Precision Laboratories

Message Alert:

PLEASE NOTE: This Test Directory is in an interim state and due to changes pertaining to the DynaLIFE transition, performing site for routing has not been updated. Please refer to Laboratory Information System for appropriate routing.

Test Name/Synonym:

Fat, Stool, Qualitative, 72 Hour (FFAT, Fecal Fat) - Calgary Zone (CLS)

LABID (Connect Care):

LAB392

Primary Container:

STOOL CAN

Specimen Collection Requirements:

72 hour stool collection in pre-weighed container available through Calgary Zone Patient Service Centres or hospital Accession departments (specimens received in any other container are subject to possible specimen rejection).
If a specimen of <72 hours is received, please advise the patient to continue the collection for the full 72 hours if possible.

Record collection (start and end) dates and times on requisition.

DO NOT perform during Barium Swallow procedure.

Supply patient with collection instruction sheet #CH3022 and diet information sheet (#CH3012).

PSC & RRL:
Send all specimens to ACH Chemistry.

Processing:

Copy of requisition must be sent with specimen.

Testing Schedule:

Daily

Reference Interval:


72-hour specimen weight assessment
Less than 7 years	<196 grams Note: Specimen weight greater than or equal to 196 grams has 55% sensitivity and 80% specificity for fecal fat excretion > 6.9 mmol/day
7-150 years	<947 grams Note: Specimen weight greater than or equal to 947 grams has 45% sensitivity and 80% specificity for fecal fat excretion >20.9 mmol/day

Click here for link to Fat, Stool Qualitative (Globules, fecal) - Calgary Zone (CLS)

Testing Area:

Chemistry

Performing Site:

Alberta Children's Hospital

Additional Test Information:

The chemical method for fecal fat has been replaced with an assessment of 72-hour specimen weight, and a qualitative test for fat globules as described in Korostensky et. al. The Journal of applied Laboratory Medicine. June 2018.

Specimen weight will be compared to age-specific cut-points with either 45% (7-150 years of age) or 55% (<7 years of age) sensitivity and 80% specificity for abnormal fat excretion (7-150 years: >20.9 mmol/day; <7 years: >6.9 mmol/day).
Specimen weight greater than cut-points will be reported as 'HIGH' in a comment.

The weight assessment should be interpreted in light of results from the test for fat, stool qualitative.

Any specimen collections less than 72 hours collection are NOT acceptable for weight assessment.
Specimens collected for less than 72 hours will only be tested for fat, stool qualitative.

Note: Additional "random" tests will not be performed on 72 hour collections unless approval has been obtained by ACH Clinical Biochemist or Clinical Biochemist on-call.

Last Updated On:

Monday, May 8, 2023