Very Low Calorie Liquid Diet for Pre op Patients

Study Overview
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Brief Summary
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Despite the relative consensus on the benefits of pre-surgical weight loss, i.e., the reduction of comorbidities associated with surgical act, such as decreased visceral fat, liver volume, hemorrhage perioperative and surgical time, the characteristics of the diet to be employed in this period need to be defined more clearly. As there is no description of comparative studies on diet of normal consistency, using solids and liquids, there are doubts as to the real need for consistency liquid diet in preoperative bariatric surgery. The lack of robust evidence has made nutrition professionals adopt different procedures. There is still a belief that these patients are unable to lose weight in the preoperative period, the ongoing history of previous attempts without success.

Official Title
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Use of Very Low Calorie Liquid Diet in the Preoperative Phase of Bariatric Surgery

Conditions
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Morbid Obesity, Steatosis

Intervention / Treatment
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* Other: A very low calorie diet of two different consistencies


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: To be clinically severe obese; To be in preoperative phase of bariatric surgery. Exclusion Criteria: Pregnancy and minors under 18 and adults over 60 years of age.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Liquid Diet Group<br>The group followed a very low calorie liquid diet for two weeks | Other: A very low calorie diet of two different consistencies<br>* Liquid and normal consistency diet with a very low calorie diet will be given to patients pre-operatively in bariatric surgery<br>|
| Active Comparator: Control Group<br>The group followed a very low calorie diet of normal consistency for two weeks. | Other: A very low calorie diet of two different consistencies<br>* Liquid and normal consistency diet with a very low calorie diet will be given to patients pre-operatively in bariatric surgery<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Loss of body weight | The patients were weighed at the start and after following a liquid diet for tow weeks they were weighed again. | 2 weeks | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Total body, visceral and liver fat loss, resting metabolic rate and changes in blood and urinary parameters | At the start, bioimpedance and indirect calorimetry exams, abdominal ultrasound scans, blood tests and urinary exams were made of the patients and after following a set diet for 2 weeks these measurements were taken again. | 2 weeks | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Very low calorie diet, liquid diet, visceral fat, liver fat.