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Updated: May 15, 2026

Roux-en-Y Gastric Bypass Operation in Rats

Roux-en-Y Gastric Bypass Operation in Rats

Published on: June 11, 2012

Improved renal function 12 months after bariatric surgery.

Chun-Cheng Hou¹, Ren-Shi Shyu, Wei-Jei Lee

¹Department of Internal Medicine, Min-Sheng General Hospital, Taoyuan, Taiwan, Republic of China.

Surgery for Obesity and Related Diseases : Official Journal of the American Society for Bariatric Surgery

|December 19, 2012

Summary

This summary is machine-generated.

Bariatric surgery significantly improved kidney function in severely obese patients within one year. Weight loss surgery positively impacted glomerular filtration rate (GFR) across various baseline kidney function levels.

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Area of Science:

Nephrology
Bariatric Surgery
Obesity Medicine

Background:

Obesity is a significant risk factor for developing chronic kidney disease (CKD).
Bariatric surgery offers a potential avenue for weight reduction and subsequent improvement in obesity-related comorbidities.
Investigating the impact of bariatric surgery on kidney function is crucial for understanding its long-term health benefits.

Purpose of the Study:

To evaluate the changes in glomerular filtration rate (GFR) in severely obese patients one year after undergoing bariatric surgery.
To assess the effect of bariatric surgery-induced weight loss on renal function across different baseline GFR categories.

Main Methods:

A cohort of 233 severely obese patients had their GFR measured pre-surgery and over 12 months post-surgery.
Patients were stratified into groups based on baseline GFR: hyperfiltration (>125 mL/min), normal (90-125 mL/min), CKD stage 2 (60-89 mL/min), and CKD stage 3 (30-59 mL/min).
GFR changes were analyzed 12 months after bariatric surgery within these defined groups.

Main Results:

Pre-surgery, 26.2% of patients exhibited hyperfiltration, 54.5% had normal GFR, 16.7% had CKD stage 2, and 2.6% had CKD stage 3.
One year post-surgery, mean GFR decreased in the hyperfiltration group but increased in the normal, CKD stage 2, and CKD stage 3 groups.
These findings indicate a general improvement in renal function parameters following bariatric surgery.

Conclusions:

Abnormal renal function, including hyperfiltration and various stages of CKD, is prevalent in severely obese individuals.
Bariatric surgery-induced weight loss demonstrates a positive impact on renal function one year after the procedure.
Weight loss surgery can be an effective intervention for improving kidney health in obese populations.