Find a Test

G6PD is the most common enzyme deficiency in the world. Newborns with G6PD may have prolonged and more pronounced neonatal jaundice then other newborns. Older individulas are subject to hemolytic anemia that can be induced by some foods, drugs, and infections.

The nature of possible underlying disease can be ruled out/confirmed through histopathological examination

The nature of possible underlying disease can be ruled out/confirmed through histopathological examination

Elevated GGT is found in all forms of liver disease. Measurement of GGT is used in the diagnosis and treatment of alcoholic cirrhosis, as well as primary and secondary liver tumors. It is more sensitive than alkaline phosphatase, the transaminases, and leucine aminopeptidase in detecting obstructive jaundice, cholangitis, and cholecystitis. Normal levels of GGT are seen in skeletal disease; thus, GGT in serum can be used to ascertain whether a disease, suggested by elevated alkaline phosphatase, is skeletal or hepatobiliary.

For the diagnosis and monitoring of gastrin-secreting tumors, gastric ulcer, Zollinger-Ellison syndrome. Also increased in pernicious anemia.

See individual assays

Gentamicin is an antibiotic used to treat life-threatening blood infections caused by gram-negative bacilli, such as Citrobacter freundii, Acinetobacter species, Enterobacter species, Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis, Providencia stuartii, Pseudomonas aeruginosa, and Serratia species. Serum gentamicin assay is useful in monitoring adequacy/ toxicity of serum concentration during gentamicin therapy.

Test is used for screening for gestational diabetes, performed at 24-28 weeks of gestation in women not previously diagnosed with overt diabetes. If plasma glucose value is >140 mg/dL at 1 hr, proceed to a 100 g OGTT
to determine if the patient has gestational diabetes.

OGTT is useful for diagnosing diabetes, insulin resistance, impaired beta cell function, and sometimes reactive hypoglycemia and acromegaly, or rarer disorders of carbohydrate metabolism. For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose in 100 mL of water. Immediately after, a fasting specimen is obtained, followed by collection at 1 hr, 2 hr and 3 hr.

OGTT is useful for diagnosing diabetes, insulin resistance, impaired beta cell function, and sometimes reactive hypoglycemia and acromegaly, or rarer disorders of carbohydrate metabolism. For appropriate interpretation of this test, the patient must fast overnight and ingest a 75 g load of glucose in 100 mL of water. Immediately after, a fasting specimen is obtained, followed by collection at 1/2 hr, 1 hr, 2 hr and 3 hr.

Gestational diabetes mellitus (GDM) is defined as any degree of glucose intolerance with onset or first recognition during pregnancy. A fasting plasma glucose level >126 mg/dl or a random plasma glucose >200 mg/dl meets the threshold
for the diagnosis of diabetes if confirmed on a subsequent day, and precludes the need for any glucose challenge. In the absence of this degree of hyperglycemia, evaluation for
GDM in women with average or high-risk characteristics should follow OGTT. The diagnosis can be made using a 75-g glucose load and the glucose threshold values listed for fasting, 1 hr, and 2 hr.

Gestational diabetes mellitus (GDM) is defined as any degree of glucose intolerance with onset or first recognition during pregnancy. A fasting plasma glucose level
>126 mg/dl or a random plasma glucose >200 mg/dl meets the threshold for the diagnosis of diabetes if confirmed on a subsequent day, and precludes the need for any glucose challenge. In the absence of this degree of hyperglycemia, evaluation for GDM in women with average or high-risk characteristics should follow OGTT. The diagnosis can be made using a 75-g glucose load and the glucose threshold values listed for fasting and 2 hr.

Postprandial glucose levels may be abnormally high in patients with gestational diabetes. If results are positive, and the patient is pregnant, a 3 hour oral glucose tolerance test should be performed for confirmation of gestational diabetes.

The 2 hr postprandial glucose test determines glucose levels in blood, two hours after a regular breakfast. It is useful for diagnosis of diabetes, cancers, and metabolic disorders. If the value for the 2 hr postprandial glucose test is between 140 and 200 mg/dL, an OGTT may be performed to confirm diabetes.

Useful in the screening or management of diabetes mellitus. Elevated urine glucose concentration can be because of hyperglycemia or a defectin proximal tubule function. As a screening test for diabetes mellitus, this test, though, has a
low sensitivity but has reasonably good specificity.

Useful in the screening or management of diabetes mellitus. Elevated urine glucose concentration can be because of hyperglycemia or a defectin proximal tubule function. As a screening test for diabetes mellitus, this test, though, has a
low sensitivity but has reasonably good specificity.

Useful in diagnosing and managing diabetes mellitus and other carbohydrate metabolism disorders including gestational diabetes, neonatal hypoglycemia, idiopathic hypoglycemia, and pancreatic islet cell carcinoma.

Useful in diagnosing and managing diabetes mellitus and other carbohydrate metabolism disorders including gestational diabetes, neonatal hypoglycemia, idiopathic hypoglycemia, and pancreatic islet cell carcinoma.

Assesses long term diabetic control in diabetes mellitus

See individual assays

See individual assays

See individual assays

Varies with source. The gram stain is a critical test for the rapid, presumptive diagnosis of infectious agents and also serves to assess the quality of clinical specimens.

Measurement of GH is primarily of interest in the diagnosis and treatment of various forms of inappropriate growth hormone secretion. Growth hormone measurements in children are used
in the evaluation of short stature and help differentiate low GH production from other sources of growth failure. Stimulation and suppression tests are often more meaningful than random measurements.