Mercy Bariatrics Perth

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Am I A Candidate?

Selection Criteria for Obesity Surgery

There are a number of widely accepted criteria which make a patient suitable for this operation:

  • Weight greater than 45kg above the ideal body weight for sex, and height.
  • BMI greater than 35 by itself or greater than 30 if there is an associated obesity illness , such as diabetes ,hypertension or sleep apnoea.
  • Reasonable attempts at other weight loss techniques.
  • Age 16-75.
  • Obesity related health problems.
  • No psychiatric or drug dependency problems.
  • A capacity to understand the risks and commitment associated with the surgery.
  • Pregnancy not anticipated in the first  6-12 months following surgery.

There is considerable flexibility in these guidelines. Patients as young as 12 have been offered surgery. Sometimes a lower BMI between 30-35 is accepted if comorbidities exist. It is recognised that patients of Indian and Asian descent often get comorbidites at a Lower BMI and their threshold for surgery also has to be lower.

Paradoxically, patients with a BMI of 30-35 have the best weight loss outcomes usually achieving over 90% EWL (See our results). The risk of surgery has to be balanced with the smaller  risks that a low BMI patient has of health issues.

Remember though that BMI is just a number. Sometimes patients with a BMI below 35 who have struggled with their weight all their lives will be offered surgery.

20 – 24.9 Normal Range
25 – 29.9 Overweight
30 – 34.9 Obese
35 – 49.9 Morbidly Obese
50+ Super Obesity
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Disclaimer: Results may vary from person to person.
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