scholarly journals P-BN03 A systematic review of pre-operative low-calorie diets for laparoscopic cholecystectomy

2021 ◽  
Vol 108 (Supplement_9) ◽  
Author(s):  
Tiffany Cheung ◽  
John Findlay
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Laparoscopic Cholecystectomy ◽  
Operative Time ◽  
Supporting Evidence ◽  
Cochrane Central Register ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Operative Difficulty

Abstract Background Laparoscopic cholecystectomy is the fourth most common procedure in the UK. Increased liver adiposity, commonly encountered in obesity, anecdotally may increase technical difficulty and surgical risk. Pre-operative low-calorie diets are well-established in bariatric surgery to reduce liver bulk, thereby ameliorating difficulty and risk. Similar diets are often used before laparoscopic cholecystectomy, however, the supporting evidence base is unclear; we performed the first systematic review on their use in this context. Methods PubMed, Embase and Cochrane Central Register of Controlled Trials databases were searched in February 2021. We included English language clinical studies describing pre-operative low-calorie diet for laparoscopic cholecystectomy. Data were extracted for specifics of / adherence to diet, weight change, operative time / difficulty, complications and length of stay. Study quality was qualified using Scottish Intercollegiate Guidelines Network criteria and Jadad score. Results One randomised controlled trial (RCT) and one prospective observational study were identified. Both utilised a pre-operative very low-calorie diet of < 800 kcal/day. Overall weight loss was greater in patients deemed compliant with the intervention. Both demonstrated tendency towards reduced operative difficulty with the intervention. Only the RCT found improvement in operative time. Conclusions Pre-operative very low-calorie diets (< 800 kcal/day for two weeks) may aid weight loss and reduce operative difficulty in laparoscopic cholecystectomy, although evidence supporting their continued use is limited. Further RCTs are warranted to fully evaluate their role in clinical and cost-effectiveness.

scholarly journals Effectiveness of a Low-Calorie Diet for Liver Volume Reduction Prior to Bariatric Surgery: a Systematic Review

2020 ◽  
Author(s):  
Marleen M. Romeijn ◽  
Aniek M. Kolen ◽  
Daniëlle D. B. Holthuijsen ◽  
Loes Janssen ◽  
Goof Schep ◽  
...  
Keyword(s):  
Systematic Review ◽  
Bariatric Surgery ◽  
Weight Loss ◽  
Liver Volume ◽  
Volume Reduction ◽  
Restricted Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Very Low Calorie Diets

Abstract An energy-restricted diet is often prescribed before bariatric surgery to reduce weight and liver volume. While very-low-calorie diets (VLCDs, 450–800 kcal per day) have shown to be effective, the effectiveness of low-calorie diets (LCDs, 800–1500 kcal per day) is less obvious. The objective of this systematic review was to elucidate the effectiveness of LCD on liver volume reduction in patients awaiting bariatric surgery. Eight studies (n = 251) were included describing nine different diets (800–1200 kcal, 2–8 weeks). An LCD was effective in liver volume reduction (12–27%) and weight loss (4–17%), particularly during the first weeks. The LCD showed an acceptable patients’ compliance. Based on these findings, an LCD (800–1200 kcal), instead of a VLCD, for 2 to 4 weeks should be preferred.

scholarly journals Body weight loss reverts obesity-associated hypogonadotropic hypogonadism: a systematic review and meta-analysis

2013 ◽  
Vol 168 (6) ◽  
pp. 829-843 ◽  
Author(s):  
Giovanni Corona ◽  
Giulia Rastrelli ◽  
Matteo Monami ◽  
Farid Saad ◽  
Michaela Luconi ◽  
...  
Keyword(s):  
Systematic Review ◽  
Bariatric Surgery ◽  
Weight Loss ◽  
Body Weight ◽  
Meta Analysis ◽  
Body Weight Loss ◽  
Low Calorie ◽  
Testosterone Levels ◽  
Low Calorie Diet ◽  
Calorie Diet

ObjectiveFew randomized clinical studies have evaluated the impact of diet and physical activity on testosterone levels in obese men with conflicting results. Conversely, studies on bariatric surgery in men generally have shown an increase in testosterone levels. The aim of this study is to perform a systematic review and meta-analysis of available trials on the effect of body weight loss on sex hormones levels.DesignMeta-analysis.MethodsAn extensive Medline search was performed including the following words: ‘testosterone’, ‘diet’, ‘weight loss’, ‘bariatric surgery’, and ‘males’. The search was restricted to data from January 1, 1969 up to August 31, 2012.ResultsOut of 266 retrieved articles, 24 were included in the study. Of the latter, 22 evaluated the effect of diet or bariatric surgery, whereas two compared diet and bariatric surgery. Overall, both a low-calorie diet and bariatric surgery are associated with a significant (P<0.0001) increase in plasma sex hormone-binding globulin-bound and -unbound testosterone levels (total testosterone (TT)), with bariatric surgery being more effective in comparison with the low-calorie diet (TT increase: 8.73 (6.51–10.95) vs 2.87 (1.68–4.07) for bariatric surgery and the low-calorie diet, respectively; both P<0.0001 vs baseline). Androgen rise is greater in those patients who lose more weight as well as in younger, non-diabetic subjects with a greater degree of obesity. Body weight loss is also associated with a decrease in estradiol and an increase in gonadotropins levels. Multiple regression analysis shows that the degree of body weight loss is the best determinant of TT rise (B=2.50±0.98, P=0.029).ConclusionsThese data show that weight loss is associated with an increase in both bound and unbound testosterone levels. The normalization of sex hormones induced by body weight loss is a possible mechanism contributing to the beneficial effects of surgery in morbid obesity.

scholarly journals The effects of exercise and low-calorie diets compared with low-calorie diets alone on health: a protocol for systematic reviews and meta-analyses of controlled clinical trials

2020 ◽  
Author(s):  
Sara Beigrezaei ◽  
Zeinab Yazdanpanah ◽  
Sepideh Soltani ◽  
Seiedeh Hamideh Rajaei ◽  
Sahar Mohseni-Takalloo ◽  
...  
Keyword(s):  
Systematic Review ◽  
Weight Loss ◽  
Clinical Trials ◽  
Meta Analysis ◽  
Controlled Clinical Trials ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Meta Analyses

Abstract Background: Exercise and weight loss diets are two independent non-pharmaceutical strategies known to improve several aspects of body composition and health. We plan to systematically review randomized controlled trials investigating weight loss diets alone compared to weight loss diets in conjunction with exercise on energy intake, body weight, body composition, cardiometabolic risk factors, sex hormones, and mental health. Methods and analysis: PubMed/MEDLINE, EMBASE, ISI (Web of sciences), Scopus, and Google Scholar will be searched to retrieve potential controlled clinical trials investigating the effects of exercise in conjunction with weight-loss diets compared with weight-loss diets alone on energy intake, body weight and composition (fat mass, fat-free mass), anthropometrics (waist circumference), cardiometabolic markers, sex hormones [testosterone, estradiol, and sex hormone binding globulin (SHBG)], liver and kidney enzymes (alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), uric acid, blood urea nitrogen (BUN), and glomerular filtration rate (GFR), quality of life, and depression in adults will be included. The weighted mean difference (WMD) and its corresponding 95% confidence intervals (CIs) will be derived using the random effects model. Several subgroup analyses such as gender, age, BMI, exercise protocol, and diet used for weight loss will be conducted to explore possible sources of heterogeneity. Publication bias will be explored by inspecting funnel plots and by conducting asymmetry tests. Overall quality of the evidence will be assessed by using the NutriGrade scoring system, which is designed to judge the overall quality of meta-analyses of clinical trials conducted in the field of nutrition. Discussion: This proposed systematic review and meta-analysis aims to compare the effects of a low-calorie diet with low-calorie diet plus exercise on the risk factors for chronic diseases. We hope this systematic review and meta-analysis will provide valuable information regarding the values which exercise add to weight-loss diets. No primary data are going to be collected; therefore, ethical approval is not required. The resulting manuscripts will be disseminated in peer-reviewed journals and at international and local conferences. Systematic review registration: This protocol in being considered for registration in the International Prospective Register of Systematic Reviews (PROSPERO).

Effectiveness, Compliance, and Acceptability of Preoperative Weight Loss with a Liquid Very Low-Calorie Diet Before Bariatric Surgery in Real Practice

2018 ◽  
Vol 29 (1) ◽  
pp. 54-60 ◽  
Author(s):  
Kamthorn Yolsuriyanwong ◽  
Komdej Thanavachirasin ◽  
Kimberly Sasso ◽  
Lauren Zuro ◽  
Jessica Bartfield ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Preoperative Weight Loss ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet ◽  
Preoperative Weight ◽  
Real Practice

scholarly journals Protocol for a randomised controlled trial of the combined effects of the GLP-1 receptor agonist liraglutide and exercise on maintenance of weight loss and health after a very low-calorie diet

BMJ Open ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. e031431
Author(s):  
Simon Birk Kjær Jensen ◽  
Julie Rehné Lundgren ◽  
Charlotte Janus ◽  
Christian Rimer Juhl ◽  
Lisa Møller Olsen ◽  
...  
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Receptor Agonist ◽  
Controlled Trial ◽  
Good Clinical Practice ◽  
Study Groups ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet

IntroductionThe success rate of weight loss maintenance is limited. Therefore, the purpose of this study is to investigate the maintenance of weight loss and immunometabolic health outcomes after diet-induced weight loss followed by 1-year treatment with a glucagon-like peptide-1 receptor agonist (liraglutide), physical exercise or the combination of both treatments as compared with placebo in individuals with obesity.Methods and analysisThis is an investigator-initiated, randomised, placebo-controlled, parallel group trial. We will enrol expectedly 200 women and men (age 18–65 years) with obesity (body mass index 32–43 kg/m2) to adhere to a very low-calorie diet (800 kcal/day) for 8 weeks in order to lose at least 5% of body weight. Subsequently, participants will be randomised in a 1:1:1:1 ratio to one of four study groups for 52 weeks: (1) placebo, (2) exercise 150 min/week+placebo, (3) liraglutide 3.0 mg/day and (4) exercise 150 min/week+liraglutide 3.0 mg/day. The primary endpoint is change in body weight from randomisation to end-of-treatment.Ethics and disseminationThe trial has been approved by the ethical committee of the Capital Region of Denmark and the Danish Medicines Agency. The trial will be conducted in agreement with the Declaration of Helsinki and monitored to follow the guidelines for good clinical practice. Results will be submitted for publication in international peer-reviewed scientific journals.Trial registration number2015-005585-32

scholarly journals Very low-calorie diet in candidates for bariatric surgery: change in body composition during rapid weight loss

Clinics ◽  
2019 ◽  
Vol 74 ◽  
Author(s):  
Marcela Pires Serafim ◽  
Marco Aurelio Santo ◽  
Alexandre Vieira Gadducci ◽  
Veruska Magalhães Scabim ◽  
Ivan Cecconello ◽  
...  
Keyword(s):  
Bariatric Surgery ◽  
Weight Loss ◽  
Body Composition ◽  
Rapid Weight Loss ◽  
Very Low Calorie Diet ◽  
Low Calorie ◽  
Low Calorie Diet ◽  
Calorie Diet
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