Preparing for limb salvage and diabetic foot surgery

Urgent surgery and planned surgery

Limb salvage surgery comes at two speeds, and preparing for diabetic foot surgery looks different for each.

Urgent surgery. When a deep infection, an abscess or spreading dead tissue threatens the foot, the operation, together with antibiotics, is the main treatment. Guidelines call for urgent surgical consultation for severe infections and for moderate ones complicated by extensive gangrene or a deep abscess, and suggest considering early surgery to remove infected and dead tissue.⁠^[1] Blood sugar and other medical problems are treated alongside the operation, and we often stage the work: clear the infection now, close the wound later. See diabetic foot infections and surgery for diabetic foot infection.

Planned surgery. Other operations are scheduled ahead, such as taking pressure off a stubborn ulcer, rebuilding a Charcot foot, removing infected bone or closing a clean wound with a skin graft or flap. Dr. Efe Ozturk, a Foot and Ankle Surgeon who is board certified in wound care (FAPWH), performs these operations. He plans them with you at wound care visits in Lyndhurst, Paramus or Millburn, and that lead time lets you lower your risks. See limb salvage surgery. If you’ve been told the foot can’t be saved, a second opinion before amputation can help you weigh the choices.

Checking blood flow first

A foot heals only as well as its blood supply allows. Guidelines advise checking circulation in everyone with diabetes who has a foot ulcer or needs a non-emergency foot operation, using tests such as Doppler waveforms and ankle and toe pressures.⁠^[2]

We do noninvasive circulation testing at our practice. If blood flow is reduced, we refer you to a vascular specialist to improve it, and your foot surgery is timed around that treatment. When infection and poor circulation occur together, guidelines advise urgent input from both a surgical and a vascular specialist to decide the timing of drainage and of restoring blood flow.⁠^[2,1]

Blood sugar and your A1c

Your A1c reflects your average blood sugar over about three months.⁠^[7] In a review of observational studies of diabetic foot ulcers, an A1c of 8% or higher went with 4.8 times the odds of amputation, though A1c wasn’t clearly tied to healing and many studies didn’t account for other differences.⁠^[3] Among 2,060 consecutive foot and ankle operations, surgical wound infections were independently tied to nerve damage and to an A1c at or above 8%.⁠^[4]

No single A1c number rules surgery in or out. A 2026 British and Irish consensus statement advises clinical judgment, rather than a fixed cutoff, about going ahead with planned surgery when A1c is above 8.5%.⁠^[7] For people with diabetes and poor circulation, the vascular guideline suggests a long-term A1c goal below 8% to protect the legs and heart, or higher when low blood sugar is a danger.⁠^[2] Before planned surgery, we work with your primary care doctor or endocrinologist toward a safer range.

Your medicines. Bring a complete list, and don’t stop or change anything on your own. SGLT2 inhibitors, such as empagliflozin, dapagliflozin and canagliflozin, can cause a dangerous acid buildup (ketoacidosis) after surgery even when blood sugar looks normal, so they are paused for a short time beforehand, on the schedule your surgical team gives you.⁠^[7] GLP-1 medicines such as semaglutide or tirzepatide can slow how fast the stomach empties, which matters for anesthesia.⁠^[7] Tell us and the anesthesia team about these and any blood thinner.

Stopping smoking

Nicotine and carbon monoxide narrow the blood vessels in your limbs and cut the oxygen reaching your tissues.⁠^[8] In foot and ankle surgery, smokers have more wound infections, slower bone healing and more bones that fail to join, and smokeless tobacco raises the risk too.⁠^[8]

Quitting works best with real support and some lead time. In a Cochrane review, intensive programs that began at least four weeks before surgery, with weekly counseling and nicotine replacement, lowered wound complications by more than two-thirds in two small trials of 210 people; brief interventions did not.⁠^[5] Ask us or your primary care doctor for help, and see the Center for Lower Extremity Surgery’s article on smoking, diabetes and surgical healing (external site).

Eating enough to heal

Healing a surgical wound uses protein and energy. When dietitians assessed 478 people admitted for limb-threatening diabetic foot ulcers, 70.5% were at risk of malnutrition and 14.6% were malnourished; lower scores were independently linked to both minor and major amputation.⁠^[6] Guidelines advise treating malnutrition and leg swelling as part of ulcer care.⁠^[9] Unless your kidney doctor has asked you to limit protein, include some at each meal, and tell us about weight loss or a poor appetite.

Kidney disease and dialysis

Guidelines list kidney function among the personal factors that can affect ulcer healing.⁠^[9] A 2026 review of 64 studies of foot ulcers in kidney failure often linked dialysis to a higher chance of amputation, even after accounting for other factors, with artery disease a key driver. Team care improved healing, which depended mostly on circulation and ulcer severity, not kidney function alone.⁠^[10] If you’re on dialysis, give us your schedule so surgery and visits fit around it, and tell your kidney doctor about the operation. See foot wounds with kidney disease.

Getting your home ready

Plan for a period with no weight on the foot:

• Choose a mobility aid and practice now. Options include crutches, a walker, a knee scooter or a wheelchair.
• Clear the way. Remove loose rugs and cords, add night lights, and set up a bed and bathroom on one floor if you can.
• Keep dressings dry. Use a shower chair and a waterproof cast cover.
• Line up help. Arrange rides, meals and shopping.
• Protect your other foot. It carries extra load and is often numb too, so check it daily. Guidelines say ulcer care should include learning how to prevent ulcers on the other foot.⁠^[9]

If you’ll wear a knee-high offloading device, we fit it and show you how to get around safely. See recovery after limb salvage surgery.

The night before and the day of surgery

Follow your fasting and morning-medicine instructions exactly. The CDC’s infection-prevention guideline advises a full-body shower or bath with soap at least the night before surgery; ask us how to keep your dressing dry.⁠^[11] Bring your medicine list, your glucose meter or monitor, and an adult to take you home.

Surgery takes place at a hospital or surgery center where Dr. Ozturk has privileges: Hoboken University Medical Center, Hudson Regional Hospital, Parkway Surgical Center in Lyndhurst and Pleasantdale Surgical Center. For anesthesia, pain control and blood clots, see the Center’s general guide to preparing for foot and ankle surgery (external site).

What preparation can and can’t do

Preparation lowers risk; it doesn’t remove it. Nerve damage and kidney disease can’t be undone in a few weeks. In a Veterans Affairs study of 21,854 people with diabetes having planned foot and ankle surgery, 3.2% had a complication within 30 days. Each one-point rise in A1c raised the odds about 5%, nerve damage raised the risk 1.78 times, and two or three diabetes-related conditions about three times.⁠^[12]

So timing is a balance. When surgery is the step that saves the foot, waiting for perfect numbers can cost more than it gains. We’ll tell you plainly whether to go ahead now or prepare a few more weeks.

Questions to ask before surgery

• Is my operation urgent, or is there time to prepare?
• Has my circulation been checked, and do I need a vascular specialist first?
• What blood sugar range are we aiming for?
• Which medicines should I stop, change or keep taking?
• How long will I keep weight off the foot?

When to seek care

See us within a day or two for any foot wound that isn’t healing, especially if you have diabetes. While you wait for surgery, call us at 908-215-5953 the same day for new redness, warmth or swelling (a red, hot, swollen foot), new drainage, or blood sugars that suddenly run much higher than usual. New foot pain at night or at rest is also a same-day call.