Tests and Procedures

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A gallbladder scan - also known as a liver-billiary scan - uses nuclear radiology to assess the function and structure of the gallbladder and surrounding organs.

Gastric Bypass (Malabsorptive) Surgery Procedure

Bariatric surgery is a procedure that alters the process of digestion and is currently the best treatment option for producing lasting weight loss in obese patients when traditional methods have not been effective.

Gastric Stapling (Restrictive) Surgery Procedure

Gastric stapling (restrictive) surgery is a type of bariatric surgery (weight loss surgery) procedure in which surgical staples are used to divide the stomach into two smaller sections, strictly limiting the amount of food a person can eat.

Gastric Banding Surgery for Teens

Gastric banding is a form of bariatric surgery. It is used to treat people with severe obesity who have trouble losing weight through diet or exercise alone.

Gamma Knife

Gamma Knife radiosurgery uses beams of highly focused gamma rays to treat small- to medium-sized lesions, usually in the brain.

Gene Mutation for Cystic Fibrosis in Newborns (Blood)

This test looks for cystic fibrosis in newborn babies. People with CF tend to develop chronic lung disease and are at risk for lung infections.

Glucose-6-Phosphate Dehydrogenase

This test finds out whether you have low levels of a particular enzyme that can cause hemolytic anemia.

Galactosemia

This test looks for enzyme activity in the red blood cells in your child’s blood. It can help diagnose galactosemia, a rare inherited disorder.

Gamma-Glutamyl Transpeptidase

This test looks for an enzyme called gamma-glutamyl transpeptidase in your blood. The test can help find out whether you have liver damage.

Gastrin

This test measures the amount of the hormone gastrin in your blood. You may need this test if you have recurrent peptic ulcers.