PATIENT INFORMATION
Diabetes
Surgery, fasting and changes in routine can all affect blood glucose.
Why it matters
Low blood glucose while fasting can be dangerous. High blood glucose around surgery can be associated with infection and slower healing. Diabetes can also affect the heart, kidneys and nerves, including the nerves that control stomach emptying.
Key questions the team will consider
- What type of diabetes you have
- What medicines or insulin you use
- Your recent control, often including an HbA1c
- Whether you have kidney, heart, eye or nerve complications
- How your treatment will be adjusted while you are fasting
Medicines needing early attention
Patients taking an SGLT2 inhibitor need early identification because these medicines are usually withheld for several days before scheduled surgery. Patients on insulin need an individual dose plan. Insulin should not simply be stopped without instructions, especially in type 1 diabetes.
Practical tips
- Ask whether your operation can be scheduled early in the day.
- Bring your glucose meter or monitor, insulin and supplies.
- Ask what to do if your blood glucose is low while fasting.
- Ask how your glucose will be checked during and after surgery, and when to restart your usual medicines.
Contact the hospital before surgery if
Your blood glucose is persistently much higher or lower than usual, or you have vomiting, abdominal pain, unusual drowsiness or rapid breathing.