Bariatric surgery may cause intestinal microecological environment imbalance due to changes in gastrointestinal anatomy.Some patients may have compli-cations,even regain weight.Probiotics can act on intestinal mucosa,epithelium and gut-associated lymphoid tissue to improve the intestinal microecological environment of obese patients after bariatric surgery.Probiotics can promote the production of short-chain fatty acids,stimulate intestinal cells to release glucagon-like peptide-1,peptide tyrosine-tyrosine,insulin and other endocrine hormones,affect the function of the central nervous system through the gut-brain axis,make patients after bariatric surgery feel full,and reduce blood sugar at the same time.Probiotics can produce lactic acid,acetic acid and lactase,to inhibit the growth of harmful bacteria and to improve gastrointestinal symptoms of patients after bariatric surgery.Probiotics can activate the AMP-activated protein kinase signaling pathway,improve lipid metabolism,and promote the recovery of symptom indicators of nonalcoholic fatty liver disease after bariatric surgery.Probiotics can regulate the release of neurotransmitters or metabolites by the microbiota through the gut-brain axis to affect brain activity and behavior,thus helping patients improve negative emotions after bariatric surgery.This article describes the intestinal microecological environment of obese patients and mechanism of the change after bariatric surgery and summarizes the effects and possible mechanisms of probiotics in improving the intestinal microecological environment of obese patients after bariatric surgery,to provide references for promoting the clinical application of probiotics.

Objective:To explore the real experiences of patients during the preoperative decision-making process for metabolic-bariatric surgery, providing a reference for developing targeted decision-support interventions.Methods:This descriptive phenomenological study used purposive sampling to select 21 patients who underwent metabolic-bariatric surgery at Sir Run Run Shaw Hospital Affiliated to Zhejiang University School of Medicine, from September 2022 to February 2023. Interviews were conducted, and the data were analyzed using Colaizzi's seven-step method.Results:Four themes and 14 sub-themes were extracted: decision-making motivation (health threats, pursuit of higher quality of life, diminished self-esteem, family responsibility drive) ; pre-decision assessment (failure of other weight-loss methods, surgery as a last resort) ; decision-making dilemmas (low quality of accessible information, low social acceptance of surgery, lack of medical insurance coverage, concerns about surgical outcomes) ; and decision-making support (professional medical support, family support, peer support, self-support) .Conclusions:Patients considering metabolic-bariatric surgery have diverse decision-making motivations and face significant dilemmas. It is recommended that relevant authorities, healthcare providers, and family members work together to create a comprehensive decision-supportive environment from the patients' perspective.

Objective:To explore the real experiences of patients during the preoperative decision-making process for metabolic-bariatric surgery, providing a reference for developing targeted decision-support interventions.Methods:This descriptive phenomenological study used purposive sampling to select 21 patients who underwent metabolic-bariatric surgery at Sir Run Run Shaw Hospital Affiliated to Zhejiang University School of Medicine, from September 2022 to February 2023. Interviews were conducted, and the data were analyzed using Colaizzi's seven-step method.Results:Four themes and 14 sub-themes were extracted: decision-making motivation (health threats, pursuit of higher quality of life, diminished self-esteem, family responsibility drive) ; pre-decision assessment (failure of other weight-loss methods, surgery as a last resort) ; decision-making dilemmas (low quality of accessible information, low social acceptance of surgery, lack of medical insurance coverage, concerns about surgical outcomes) ; and decision-making support (professional medical support, family support, peer support, self-support) .Conclusions:Patients considering metabolic-bariatric surgery have diverse decision-making motivations and face significant dilemmas. It is recommended that relevant authorities, healthcare providers, and family members work together to create a comprehensive decision-supportive environment from the patients' perspective.