Preparations for an ultrasound test depend greatly on the type of ultrasound being performed. However, most ultrasound tests require little or no preparation. For ultrasounds being performed on internal organs, such as the gallbladder, patients may be asked to avoid eating or drinking for six to eight hours before the examination.

However, for other ultrasounds, such as pregnancy or bladder tests, the patient may be asked to drink up to six glasses of water one hour prior to the test to fill the area with extra fluid. The excess fluid in the bladder helps to move air–filled bowel loops away from the area of concern for a clearer view.

In preparation for an ultrasound, it may be helpful to ask a healthcare provider about:

• Eating or drinking restrictions prior to the test
• Taking any medications prior to the test
• Smoking or using nicotine products before the test
• Avoiding soda or other carbonated drinks before the test
• Wearing loose-fitting, comfortable clothing
• Leaving jewelry and valuables at home