Bariatric Surgery · the truth减重手术真相 · Bariatric Surgery

Place · Level 3 · Intervention

重度肥胖唯一持续显著的干预 · SOS 10y 体重 -25% / 全因死亡 ↓29% · 不是懒人方案 · 改造解剖 + 改造肠道激素 · 终生随访 + 终生补充

Procedures · expanded indications

Stop 1/5

术式分类 · 适应症放宽

Bariatric surgery, more accurately called metabolic surgery today, is no longer just 'shrinking the stomach.' Three mainstream procedures plus historical ones:

1. Roux-en-Y gastric bypass (RYGB)

Creates a ~30 mL gastric pouch, bypasses the rest of the stomach + duodenum + proximal jejunum, then anastomoses the distal small bowel to the pouchFood bypasses ~100-150 cm of small bowel — both restrictive and anatomically altered absorptionHistoric 'gold standard', strongest and most durable weight loss, highest diabetes remission
2. Sleeve gastrectomy (SG)

Vertically resect ~80% of the stomach along the greater curvature, leaving a sleeve tube; no bypassSimplest anatomy, shortest operative time, fewer nutritional complications than RYGBSurpassed RYGB after 2013 to become the #1 procedure worldwide (~60% share)
3. Historical / niche procedures (rarely used)

Adjustable gastric band (Lap-Band): poor long-term outcomes, high revision rate, essentially abandonedBiliopancreatic diversion + duodenal switch (BPD/DS): greatest weight loss but severe nutritional complications, reserved for super-obesity (BMI ≥ 50) in expert centersSADI-S (single anastomosis duodenoileal bypass + SG): simplified BPD/DS, growing adoption
Indications expanded in 2022 (Eisenberg 2022 ASMBS/IFSO joint statement, replacing the 1991 NIH consensus):

BMI ≥ 35: recommended regardless of comorbiditiesBMI ≥ 30 + refractory T2D or metabolic syndrome: should be consideredAsian BMI ≥ 27.5 + comorbidity: consider (more visceral fat at same BMI, lower threshold)No more hard age cutoff — individualized (evidence growing in adolescents and older adults)Removes the rigid 'must try lifestyle for X months first' prerequisite (which often delays the optimal window)
Why the loosening: 30 years of follow-up data + modern laparoscopic 30-day mortality < 0.3% — surgical risk is now lower than the risk of untreated obesity itself. Current consensus: in the right patient, earlier is better.

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