Anorectal Manometry Preparation This test is completed by a nurse and measures the muscle strength in the anal canal. Read and follow the instructions below or download a PDF copy. Download PDF Play Video How it is done A small tube will be inserted into the rectum. There is a small balloon on the end of the tube.Once it is placed into the rectum, the balloon will be inflated in intervals in order to measure pressures throughout the testing.The test will take about 45 minutes. How to prepare There are NO dietary restrictions.No sedation is given, so you do not need a driver.Please complete 2 fleet enemas (sold over the counter) 2 hours prior to your test.Arrive 30 minutes prior to scheduled time.Test results will be given to you by your physician at a later date. Please allow 7 – 10 days for test results. QUESTIONS? Call our office during regular business hours (8:00am to 4:30pm) at 614-754-5500.