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Ormiston Hospital Bariatric Surgery

Private Surgical Service

This is where you will come to have your surgery performed. The visits to your surgeon before and after surgery will be at their consulting rooms.


Bariatric or weight loss surgery refers to a number of different procedures that can be performed to treat obesity.

Bariatric (Weight Loss) Surgery assists in weight loss and maybe recommended as a last resort when diet, exercise and medication have not been successful and if obesity related conditions such as heart disease, asthma, high blood pressure, sleep apnoea and type II diabetes have worsened, amongst other problems.

The aim of the surgery is to reduce the food-holding capacity of the stomach so the patient has a feeling of fullness after eating very little.

Bariatric surgery is not a quick-fix cure.  Weight loss still depends on healthy eating and exercise.  The patient who follows postoperative diet and exercise instructions can expect good results.

Most patients achieve good to excellent weight loss results following gastric sleeve surgery, typically this is 50-60% of excess weight.   There can be some weight regain, but this is usually minor.  There is no amount of weight loss that is guaranteed.

Procedures fall into three main types:

Malabsorptive - these procedures involve bypassing a section of the small intestine thus reducing the amount of food absorbed into the body.

Restrictive - these procedures involve reducing the size of the stomach, usually by creating a small pouch at the top of the stomach which limits the amount of food that can be eaten.

Malabsorptive/Restrictive Combination - these procedures combine both techniques e.g. gastric bypass surgery in which a small stomach pouch is formed and its outlet connected to part of the small intestine.


Contact Details

Ormiston Hospital

South Auckland

125 Ormiston Road
Flat Bush
Auckland 2016

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Street Address

125 Ormiston Road
Flat Bush
Auckland 2016

Postal Address

PO Box 38921
Auckland 2145

This page was last updated at 9:36AM on May 15, 2019. This information is reviewed and edited by Ormiston Hospital Bariatric Surgery.