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Test Code (รหัสการทดสอบ):
090-20-0510-01

Order Name (ชื่อการทดสอบ):
GTT 2 & 5 hrs., DEX 100 g. (Fasting , 0.5, 1, 1.5, 2, 5 hrs.)

 
Specimen / Container (สิ่งส่งตรวจ/ภาชนะ):
Blood/ Plain blood (Red top) 6 mL, 1 tube
and
Urine, Clean container 
* นำส่งห้องปฏิบัติการหลังจากเจาะเลือดทันที *
 
 
Turnaround Time (ระยะเวลารอผล):
Collected specimen to report within 90 min
 
Useful For (ประโยชน์การทดสอบ):
Diagnosis and screening for diabetes or prediabetes.
 
Methodology (วิธีการทดสอบ):
 Hexokinase/ G-6-PDH
 
Test List In Profile (การทดสอบใน Profile):
Glucose (Blood)
Glucose (Urine) ; Qualitative 
 
AliasesName (ชื่อเรียกอื่นๆ) :
Glucose Tolerance Test
Oral Glucose Tolerance Test (OGTT)
Sugar
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0510-01

Order Name (ชื่อการทดสอบ):
GTT 2 & 5 hrs., DEX 100 g. (Fasting , 0.5, 1, 1.5, 2, 5 hrs.)

 
Patient Preparation (การเตรียมตัวผู้ป่วย):
  1. Patient should be fasting at least 8 hours. 
  2. Patient can drink water as usual.
  3. Patient who takes the antihypertensive drugs, can take it as usual. 
 
Collection Specimen Or Container (สิ่งส่งตรวจ/ภาชนะ):
Blood/ Plain blood (Red top) 6 mL, 1 tube
and
Urine, Clean container 
* นำส่งห้องปฏิบัติการหลังจากเจาะเลือดทันที *
 
 
Specimen Testing Type (สิ่งส่งตรวจที่ใช้ในการทดสอบ):
Serum, minimum volume 0.5 mL
 
Sub Mission Container (ภาชนะส่งตรวจ):
Plastic vial
 
Rejection Criteria (เกณฑ์ปฏิเสธสิ่งส่งตรวจ):
Hemolysis: 4+ reject
Lipemia: 4+ reject
Icterus: 4+ reject
 
Specimen Stabillity (ความคงตัวของสิ่งส่งตรวจ):
Specimen Type Temperature Time
Serum Refrigerated, 2oC to 8oC 7 days
Frozen, -20oC 3 months
Random urine Refrigerated, 2oC to 8oC 2 hours
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0510-01

Order Name (ชื่อการทดสอบ):
GTT 2 & 5 hrs., DEX 100 g. (Fasting , 0.5, 1, 1.5, 2, 5 hrs.)

 
Method detail (วิธีการทดสอบ):
 Hexokinase/ G-6-PDH
 
Schedule (ตารางการทดสอบ):
Tested daily (24 hours)
 
Turnaround Time (ระยะเวลารอผล):
Collected specimen to report within 90 min
 
Performing Location (หน่วยงานที่ทำการทดสอบ):
5 days
 
Specimen Retention Time (ระยะเวลาเก็บสิ่งส่งตรวจ):
The OGTT evaluates how the body manages glucose after a meal. Glucose is a type of sugar produced when the body breaks down carbohydrates consumed in food. Some of the glucose will be used for energy; the rest will be stored for future use.

The amount of glucose in your blood is controlled by the hormones insulin and glucagon. If you have too much, the pancreas secretes insulin to help cells absorb and store glucose. If you have too little, the pancreas secretes glucagon so that stored glucose can be released back into the bloodstream.

Under normal circumstances, the body will be able to maintain the ideal balance of blood glucose. However, if any parts of the system are impaired, glucose can rapidly accumulate, leading to high blood sugar (hyperglycemia) and diabetes.

The OGTT is a highly sensitive test that can detect imbalances that other tests miss. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) recommends the OGTT for the following purposes:

Screening and diagnosis of prediabetes or impaired glucose tolerance (IGT)       
Screening and diagnosis of type 2 diabetes
Screening and diagnosis of gestational diabetes

The OGTT is only used for diagnosis and screening. It has no role in the monitoring of diabetes or prediabetes.

Among its other uses, the OGTT can be ordered to diagnose reactive hypoglycemia (in which blood sugar drops after eating), acromegaly (an overactive pituitary gland), beta cell dysfunction (in which insulin is not being secreted), and rare disorders affecting carbohydrate metabolism (such as hereditary fructose intolerance).
 
 
 
Test Code (รหัสการทดสอบ):
090-20-0510-01

Order Name (ชื่อการทดสอบ):
GTT 2 & 5 hrs., DEX 100 g. (Fasting , 0.5, 1, 1.5, 2, 5 hrs.)

 
 
Clinical Reference (เอกสารอ้างอิง):
  1. Manufacturer’s reagent package insert, Architect ®/Aeroset® Glucose , ABBOTT Laboratories, Abbot Park IL 60064 USA
  2. http://www.diabetes.org/diabetes-basics/diagnosis (Retrieved: June 2018)
  3. http://www.mayomedicallaboratories.com (Retrieved: 01 Jan 2019)
  4. https://www.verywellhealth.com (Retrieve: 9 Mar 2019)