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Clear
 
Test Code:
090-10-0800

Order Name:
APT Test

 
Useful For:
Diagnose swallowed blood syndrome and differentiate this condition from gastrointestinal hemorrhage in the newborn
 
Methodology:
Alkali Denaturation
 
AliasesName:
Fetal Hemoglobin
Alkali Denaturation Test
Apt–Downey test
 
 
 
Test Code:
090-10-0800

Order Name:
APT Test

 
Collection Specimen Or Container:
Gastric Content/ Sterile Container
 
Specimen Testing Type:
Gastric Content
 
Sub Mission Container:
Sterile Container
 
Specimen Stabillity:
Specimen Type Temperature Time
Gastric content Room temperature, 18oC to 25oC 1 hour
Refrigerated, 2oC to 8oC 1 hour
 
 
 
Test Code:
090-10-0800

Order Name:
APT Test

 
Method detail:
Alkali Denaturation
 
Schedule:
Tested Daily (24 hours)
 
Turnaround Time:
Collected specimen to report within 1 hour
 
Performing Location:
Hematology, Laboratory Department Tel. 17254
 
Specimen Retention Time:
1 day
 
 
 
Test Code:
090-10-0800

Order Name:
APT Test

 
 
Clinical Information:
In the swallowed blood syndrome, blood or bloody stools are passed usually on the second or third day of life. The blood may be swallowed during delivery or may be from a fissure of the mother's nipple. This condition must be differentiated from gastrointestinal hemorrhage of the newborn
 
Reference Value:
Negative (Maternal blood, Hb A)
 
Interpretation:
Fetal hemoglobin is alkali resistant, and the solution will remain pink. Maternal blood will be converted to alkaline hematin in 1-2 minutes, and the solution becomes yellow to dark green-brown. Thus, if the supernatant remains pink (indicative of fetal blood)
 
Clinical Reference:
  1. http://online.lexi.com (Retrieved: 22 Jan 2019)
  2. https://th.wikipedia.org (Retrieved: 29 Jan 2019)