Eras protocol in major abdominal surgeries and use fo
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"enhanced recovery after surgery" AND "abdominal surgery"
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ERAS Protocol in Major Abdominal Surgery
(Your message was cut off after "use fo..." - if you meant "use of fluids" or "use of opioids/analgesia," both are covered below as core ERAS elements.)
Background and Rationale
ERAS (Enhanced Recovery After Surgery) was pioneered by Danish surgeon Henrik Kehlet in the 1990s. Traditional perioperative care relied on prolonged NPO status, liberal IV fluids, nasogastric decompression, bed rest, and opioid-heavy analgesia. European physicians recognized that the perioperative physiologic stress response - driving immunosuppression, hypoxia, insulin resistance, and catabolism - was a primary driver of postoperative morbidity. ERAS was designed to systematically target and attenuate each of these factors.
ERAS was first adopted in colorectal surgery but has since spread to HPB, gastric, esophageal, bariatric, gynecologic, and urologic surgery. The ERAS Society (errassociety.org) publishes specialty-specific consensus guidelines.
- Mulholland and Greenfield's Surgery, 7e, p. 3400
- Berek & Novak's Gynecology, p. 1225
Core Principle: Multimodal, Multidisciplinary
ERAS requires a multidisciplinary team - surgeons, anesthesiologists, nurses, dietitians, physiotherapists, and pharmacists - addressing recovery-delaying factors through a standardized, evidence-based pathway across three phases.
PHASE 1: Preoperative Elements
| Element | Detail |
|---|---|
| Patient education and counseling | Clear written and verbal instructions about the perioperative course; sets expectations and reduces anxiety |
| Nutritional assessment | Identify malnutrition; provide enteral supplements or nasogastric feeding in high-risk patients (e.g., oesophageal stenosis) |
| Prehabilitation | Exercise program including incentive spirometry and general conditioning; especially important for esophagectomy |
| Smoking and alcohol cessation | At least 4-8 weeks before elective surgery |
| Modified fasting (not NPO after midnight) | Solids allowed until 6 hours before surgery; clear liquids until 2 hours before surgery - recommended by the ASA and supported by ERAS guidelines |
| Carbohydrate loading | Drinks containing 12.5% maltodextrin (e.g., a 12 oz Gatorade) 2-3 hours preoperatively. Improves insulin resistance and reduces hospital stay. Fasting causes increased insulin resistance that worsens perioperative morbidity |
| Antiemetic prophylaxis with steroids | Preoperative dexamethasone is a standard ERAS antiemetic element |
| Avoidance of mechanical bowel preparation | No clear benefit demonstrated; associated with patient dissatisfaction, electrolyte disturbances, and dehydration |
| DVT prophylaxis planning | LMWH or unfractionated heparin + mechanical (IPC); extended prophylaxis up to 4 weeks for major abdominal/pelvic surgery |
| Prophylactic antibiotics | IV antibiotics within 30 minutes of incision (e.g., cefoxitin or cefotetan); covering aerobic and anaerobic organisms reduces SSI by up to 66% |
| Chest physiotherapy | Especially for esophagectomy and high-risk pulmonary patients |
- Berek & Novak's Gynecology, p. 1225-1226
- Bailey & Love's Short Practice of Surgery, 28e, Table 66.5
- Mulholland & Greenfield's Surgery, 7e, p. 3400
PHASE 2: Intraoperative Elements
| Element | Detail |
|---|---|
| Minimally invasive approach | Laparoscopic or robotic surgery when feasible; reduces the stress response and wound complications |
| Goal-directed fluid therapy (GDFT) | The cornerstone of intraoperative ERAS fluid management. Avoid both over- and under-resuscitation. Tools include stroke volume variation, pulse contour analysis, and tissue oxygen tension monitoring. The goal is euvolemia - excess IV fluid is linked to prolonged ileus, coagulation abnormalities, and urinary retention |
| Balanced/isotonic crystalloids | Lactated Ringer's or Plasma-Lyte preferred over NS to avoid hyperchloremic acidosis with high volumes |
| Vasopressors alongside fluids | In colorectal ERAS, vasopressors are used in combination with fluids rather than simply giving more IV fluid to correct blood pressure |
| Normothermia | Active warming; hypothermia worsens coagulopathy, increases SSI risk, and prolongs ileus |
| Multimodal opioid-sparing analgesia | NSAIDs, paracetamol/acetaminophen, ketamine, alpha-2 agonists (dexmedetomidine), and gabapentinoids to minimize opioid use |
| Regional anesthesia | Epidural analgesia is standard for open major abdominal surgery; peripheral nerve blocks (TAP block, quadratus lumborum block) for laparoscopic cases. Reduces opioid consumption, PONV, and time to mobilization |
| PONV prophylaxis | Multimodal: ondansetron (5-HT3 antagonist) + dexamethasone ± scopolamine patch. Two-agent prophylaxis is the minimum |
| Avoidance of drains and nasogastric tubes | No routine nasogastric decompression in gastrectomy ERAS (early removal in theatre); drain avoidance unless specifically indicated |
| DVT prophylaxis intraoperatively | Mechanical sequential compression devices throughout case |
- Current Surgical Therapy, 14e, p. 3066-3068
- Schwartz's Principles of Surgery, 11e
- Miller's Anesthesia, 10e, p. 10041-10043
PHASE 3: Postoperative Elements
| Element | Detail |
|---|---|
| Early oral feeding | Resume oral intake on POD 0 or POD 1; this does NOT increase anastomotic leak risk, including in colorectal surgery. Early feeding reduces catabolism and improves gut motility |
| Prompt IV fluid discontinuation | Target POD 1 at the latest; IV fluid overload delays return of bowel function |
| Multimodal analgesia (opioid-sparing) | Regular paracetamol + NSAIDs + regional analgesia (epidural or TAP block). Opioids used only as rescue medication |
| Early mobilization | From POD 1, supervised by physiotherapist; reduces DVT risk, maintains muscle mass, and improves pulmonary function |
| Early catheter removal | Urinary catheters removed as soon as hemodynamic monitoring of urine output is no longer required |
| Laxatives/alvimopan | Promote bowel recovery; alvimopan (peripheral mu-opioid receptor antagonist) is used specifically to reverse opioid-induced ileus |
| PONV treatment | If nausea occurs, use an antiemetic of a different class than prophylaxis already given; no value in repeating same agent within 6 hours |
| Nutritional support | PPN/TPN or feeding jejunostomy for those unable to maintain ≥60% of caloric requirements by day 5 |
| DVT prophylaxis continued | LMWH continued; extended for major abdominal/pelvic cancer surgery (up to 28 days) |
| Structured discharge criteria | Clear written criteria for discharge; telemedicine or phone follow-up |
- Bailey & Love's Short Practice of Surgery, 28e, Table 66.5
- Berek & Novak's Gynecology, p. 1226
- Miller's Anesthesia, 10e, p. 10042
ERAS by Specific Surgical Procedure
Colorectal Surgery (the original ERAS setting)
- First ERAS protocols in open colorectal surgery (1990s)
- Key elements: carbohydrate loading, epidural analgesia, early feeding, early mobilization, minimal IV fluids
- Systematic reviews confirm: shorter hospital stay, fewer overall complications, no difference in mortality
- Mulholland & Greenfield's Surgery, 7e, p. 3400
Hepatopancreaticobiliary (HPB) Surgery
- Liver resection: ERAS reduces LOS from 8 to 6 days (initial series) and 7 to 4 days (RCT for open major resection); improved quality of life; reduced medically-related complications
- Pancreaticoduodenectomy (Whipple's): ERAS reduces delayed gastric emptying by nearly half, allowing earlier feeding; ERAS Society published consensus guidelines in 2012
- Distal pancreatectomy: Multiple studies confirm reduced LOS and complications
- Schwartz's Principles of Surgery, 11e, ERAS in HPB section
Gastrectomy / Esophagectomy
- Gastrectomy ERAS guidelines (2014): No routine nasogastric decompression; early feeding within POD 1; early nutritional support if malnourished
- Esophagectomy: Most components applied except routine early oral feeding (nasogastric decompression often maintained longer); jejunostomy feeding provides early enteral nutrition; systematic reviews show reduced LOS, anastomotic leak, and pulmonary complications
- Schwartz's Principles of Surgery, 11e, ERAS in Gastrectomy/Esophagectomy section
Bariatric Surgery
- Meta-analyses confirm reduced LOS without increased complications or morbidity
Gynecologic Surgery (Berek & Novak's)
- ERAS protocol for gynecologic oncology surgery reduces LOS, complications, and healthcare costs
- Components identical to colorectal ERAS with emphasis on multimodal PONV prophylaxis and pelvic floor physiotherapy
Fluid Management in ERAS (a central pillar)
The 2011 European Society of Anaesthesiology guidelines and ERAS protocols shifted fluid management from "liberal" to goal-directed euvolemia:
- Preoperative: Carbohydrate + electrolyte-rich drinks until 2 hours preop; avoids dehydration from prolonged fasting
- Intraoperative: Goal-directed therapy using hemodynamic monitors (stroke volume variation, pulse contour). Vasopressors supplement fluids to maintain MAP without over-loading. Balanced crystalloids (LR/Plasma-Lyte) preferred
- Postoperative: Early enteral intake replaces IV fluids; IV fluid discontinued by POD 1
Key evidence: Fluid overload is associated with prolonged ileus, coagulation abnormalities, pulmonary edema, and impaired wound healing. Goal-directed therapy reduces postoperative morbidity and LOS independently of other ERAS components.
No single monitoring technique (SVV, PiCCO, automated closed-loop) has proven universally superior - the shared principle is avoid over-resuscitation, target physiologic endpoints of euvolemia.
- Schwartz's Principles of Surgery, 11e, p. 125
- Current Surgical Therapy, 14e, p. 3066-3068
Outcomes of ERAS
| Outcome | Effect of ERAS |
|---|---|
| Length of hospital stay | Consistently reduced (often by 30-50%) |
| Overall postoperative complications | Reduced |
| Surgical complications (leak, bleeding) | No increase |
| Mortality | No difference (not worse) |
| Readmission rates | Not increased |
| Healthcare costs | Reduced |
| Patient satisfaction | Improved |
| Return of bowel function | Earlier |
| Opioid consumption | Reduced |
Recent Evidence (PubMed 2024-2026)
- Emergency abdominal surgery (PMID 37985500, 2024 meta-analysis): ERAS protocols after emergency intra-abdominal surgery also show benefit in LOS and complications
- Early mobilization in ERAS (PMID 41903160, 2026 meta-analysis): Early mobilization as part of ERAS after emergency abdominal surgery improves postoperative outcomes
- Open AAA repair (PMID 41895588, 2026 meta-analysis): ERAS protocols improve outcomes even after open aortic aneurysm repair
- Anterior quadratus lumborum block (PMID 39454308, 2025 meta-analysis): QL block is a useful regional analgesia component within ERAS for abdominal surgery
Summary: Key "Never Skip" ERAS Elements
- Carbohydrate loading 2-3 hours preop
- Clear liquids until 2 hours preop (not NPO after midnight)
- Goal-directed intraoperative fluid therapy with vasopressors
- Multimodal opioid-sparing analgesia including regional block
- PONV prophylaxis (at least two classes)
- Normothermia maintenance intraoperatively
- Early oral feeding POD 0 or 1
- Early mobilization from POD 1
- Early IV fluid discontinuation by POD 1
- Early catheter removal
If your question was specifically about "use of fluids," "use of opioids," "use of regional anesthesia," or another specific topic, please complete the question and I can go deeper on that aspect.
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