Before Surgery
Preparing for bariatric surgery well is half the way to success.
Once you have decided to have weight-loss surgery, a phase begins that is just as important as the operation itself: preparing for bariatric surgery. Thorough testing and physical and psychological readiness significantly reduce complications and support a faster recovery and better long-term results, whether your procedure is a sleeve gastrectomy or a gastric bypass.
💡 Quick summary
- A full consultation plus blood, heart, chest and abdominal tests.
- A pre-operative diet to shrink the liver.
- Stopping smoking and certain medications as instructed.
- Preparing your home and supplies for recovery.
Preparing for Bariatric Surgery: Consultation and Assessment
The journey starts with a visit to the surgeon, who calculates your body mass index, reviews your medical history, medications and previous surgeries, and discusses your goals and expectations. Based on this, the surgeon recommends the most suitable procedure and explains its benefits and potential risks.
Tests Required Before Bariatric Surgery
Blood tests
Complete blood count, coagulation, liver and kidney function, HbA1c, thyroid, vitamins and iron.
Heart and chest
ECG and chest X-ray; an echocardiogram or lung function tests may be requested depending on your case.
Abdominal imaging
Abdominal ultrasound to assess fatty liver and the gallbladder; an upper endoscopy may be requested for reflux patients.
Psychological and nutritional assessment
To confirm readiness for lifestyle change and commitment to the post-operative diet.
The surgeon may request additional tests depending on your condition, such as a sleep study for snoring and sleep apnea, or an endocrinology consultation for patients with hypothyroidism.
The Diet When Preparing for Bariatric Surgery
Most bariatric surgeons ask patients to follow a special diet, usually for one to two weeks before surgery. Its main goal is to reduce the size of a fatty, enlarged liver, which covers the stomach and makes laparoscopic work harder.
- Low-calorie, high-protein meals (eggs, yogurt, low-fat cheese, grilled chicken and fish).
- Strictly avoiding sugars, refined carbohydrates, fried foods and soft drinks.
- Drinking enough water throughout the day.
- In the final days the plan may switch to protein shakes and clear fluids, as your doctor instructs.
Medications and Habits to Adjust
| Item | Usual action | Reason |
|---|---|---|
| Smoking | Stop several weeks before surgery | Raises the risk of leaks, clots and ulcers. Read more |
| NSAID painkillers | Stop as instructed | Increase the risk of ulcers and bleeding. Read more |
| Blood thinners | Adjust the dose or switch | To reduce bleeding risk during surgery. |
| Hormonal contraceptives | Usually paused temporarily | Increase the risk of blood clots. |
| Diabetes medications | Dose adjustment | To avoid low blood sugar on the new diet. |
Do not stop or change any medication on your own. Tell your doctor about every medication, supplement and herb you take.
What to Prepare for Surgery Day
- FastingStop eating about 8 hours before surgery as instructed by the anesthesiologist.
- Documents and resultsBring all lab results, imaging and your medication list.
- Comfortable clothesLoose, easy-to-wear clothing and comfortable shoes for walking after surgery.
- A companionA family member to support you during your stay and the trip home.
- Prepare your homeStock protein supplements and allowed fluids for the first week after surgery.
For more trusted information, see the NIDDK guide to weight-loss surgery.
FAQs About Preparing for Bariatric Surgery
How long does preparation for bariatric surgery take?
Usually one to three weeks, including the consultation, tests, nutritional assessment and the pre-operative diet. It may take longer if conditions such as diabetes or hypertension need to be controlled first.
Why does the surgeon ask for a diet before surgery?
A low-calorie, high-protein diet shrinks the fatty liver and makes it more flexible, which makes it easier to reach the stomach laparoscopically and reduces operating time and complications.
Should I stop all my medications before surgery?
No. Some medications, such as most blood-pressure drugs, are usually continued, while others like NSAID painkillers, blood thinners, some diabetes drugs and hormonal contraceptives are stopped or adjusted. Never stop any medication without your doctor’s instructions.
When should I stop eating and drinking before surgery?
You are usually asked to fast from food for about 8 hours before surgery, with specific instructions about clear fluids given by the anesthesiologist.
Ready to Start Preparing for Bariatric Surgery?
The Shinkar Clinic team supports you step by step, from your first consultation to follow-up after surgery.
Book an AppointmentDisclaimer: This article is for educational purposes only and does not replace consultation with a qualified physician.