If you have diabetes, it is important to have good blood glucose levels before and after surgery. This will help you heal better after surgery and lower your risk of infection.

It is recommended for you to have an A1c level lower than 7.5 percent within three months before your surgery. The stress of surgery can sometimes increase your blood glucose level after surgery. You may be given insulin to control your blood glucose while you are in the hospital. 

Be sure to follow any instructions given to you by your health care provider who manages your diabetes.

Source: Allina Health's Patient Education Department, Knee Replacement, seventh edition, ortho-ah-90140
First Published: 10/01/2000
Last Reviewed: 02/01/2020