Very Low Calorie Liquid Diet for Pre op Patients

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

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT01748682

Enrollment

104

Registered

2012-12-12

Start date

2011-01-31

Completion date

2012-09-30

Last updated

2012-12-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Morbid Obesity, Steatosis

Keywords

Very low calorie diet, liquid diet, visceral fat, liver fat.

Brief summary

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.

Interventions

OTHERA very low calorie diet of two different consistencies

Liquid and normal consistency diet with a very low calorie diet will be given to patients pre-operatively in bariatric surgery

Study design

Allocation

RANDOMIZED

Intervention model

PARALLEL

Primary purpose

TREATMENT

Masking

NONE

Eligibility

Sex/Gender

ALL

Age

18 Years to 60 Years

Healthy volunteers

Yes

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.

Design outcomes

Primary

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

Secondary

Measure	Time frame	Description
Total body, visceral and liver fat loss, resting metabolic rate and changes in blood and urinary parameters	2 weeks	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.

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026