Anesthetic Considerations for ERCP

Sedation Options and Selection

• Enhanced sedation with propofol administered by an anesthetist or general anesthesia should be strongly considered for ERCP procedures, as this approach is associated with higher procedural success rates, better patient satisfaction, and improved tolerance compared to traditional conscious sedation with benzodiazepines and opioids 1, 2
• Traditional conscious sedation using intravenous benzodiazepines (midazolam) and opiates is generally well tolerated but has significant limitations, with 14% of ERCPs performed under conscious sedation being poorly tolerated, leading to procedural failure and patient distress 1, 2, 3
• The complexity and duration of ERCP often necessitates higher benzodiazepine doses than routine endoscopy, with 33% of patients receiving >5.5 mg midazolam and approximately 8% requiring naloxone 1, 4
• Most ERCP services in Western Europe and North America now use propofol-based enhanced sedation or general anesthesia as standard practice, with propofol-assisted ERCP being safe and having high rates of procedural success and patient satisfaction 1, 2, 5, 6
• Propofol sedation requires administration by an anesthetist in UK practice, as there is a lack of support for non-anesthetist administration 1, 5

Specific Indications for Enhanced Sedation

• Enhanced sedation or general anesthesia should be specifically considered for complex cases requiring long procedures, intrahepatic ductal stones, and cases where lack of enhanced sedation has been correlated with therapeutic failure 1, 2, 5, 7

Pre-Procedural NPO Requirements

• Patients must discontinue solid food intake at least 6 hours before ERCP, and clear liquids may be permitted up to 2-4 hours before the procedure but should be discontinued thereafter 8
• Strict NPO status is critical because ERCP often requires deep sedation or general anesthesia, making airway protection essential 8

Anticoagulation Management

• For ERCP classified as a high bleeding risk procedure, warfarin should be discontinued 5 days before the procedure with INR checked to ensure <1.5, and direct oral anticoagulants (DOACs) should be discontinued at least 48 hours before the procedure 8
• For high thrombotic risk patients, bridging with low molecular weight heparin may be necessary 8

Post-Procedural Care

• Early oral feeding within 24 hours is recommended after ERCP rather than prolonged NPO status, and routine extended NPO orders should be avoided as they can lead to nutritional deficits and delayed recovery 8
• Intravenous ketorolac is recommended for post-ERCP pain management as it provides effective analgesia and has the additional benefit of reducing post-ERCP pancreatitis risk 9

Complication Prevention

• Rectal NSAIDs (100 mg indomethacin or diclofenac) should be administered to all patients undergoing ERCP unless contraindicated, as high-quality RCTs have demonstrated benefit in reducing post-ERCP pancreatitis 4, 5
• Post-ERCP pancreatitis occurs in 2-5% of therapeutic ERCPs 4, 9
• Prophylactic antibiotics can be safely avoided in the absence of specific risk factors, but are indicated for patients with sclerosing cholangitis, communicating pancreatic cysts, hilar strictures, liver transplantation, cholangioscopy, or failed attempt to drain an opacified bile duct 1, 4, 10

Facility Requirements

• Units providing propofol sedation must meet minimum requirements as outlined in BSG guidance in conjunction with the Royal College of Anaesthetists, and appropriately resourced facilities with trained clinicians are essential to maintain high-quality ERCP services 1, 5, 6

Propofol‑Based Monitored Anesthesia Care for ERCP

Sedation Technique

• Target‑controlled infusion (TCI) of propofol is recommended to achieve optimal sedation control during ERCP, providing precise plasma concentration targeting and rapid titration. 11, 12

Propofol Dosing Strategy

• Initiate TCI with plasma concentrations of 1.0–2.0 µg/mL and titrate upward as needed to maintain patient cooperation while preserving safety. 11
• Maintain overall propofol exposure in the range of 70–350 mg for a typical ERCP procedure, allowing adequate depth of sedation without excessive dosing. 11, 12

Adjunct Analgesia

• Add a fentanyl bolus of 50–100 µg to the propofol regimen to provide stable analgesia and improve oxygenation compared with propofol alone. 11, 12

Intra‑Procedural Monitoring

• Continuous pulse‑oximetry with immediate supplemental oxygen must be employed throughout the procedure to detect hypoxemia early. 11

Respiratory Safety Profile

• Transient oxygen desaturation (SpO₂ < 90 %) occurs in ≈ 8 % of cases, typically lasting 16–56 seconds; these events are usually brief and self‑limited. 11
• Short‑lasting apnea episodes are observed, with durations of 1–37 seconds when they occur. 11

Post‑Procedural Recovery

• Because of propofol’s rapid offset, the majority of patients achieve a full recovery (Aldrete score ≥ 12) within 1 minute after the end of the procedure. 11

Sedation for ERCP in Average‑Risk Adults

Preferred Sedation Strategy

• Propofol‑based monitored anesthesia care (MAC) for ASA I‑II patients provides safe, effective sedation with high procedural success and superior patient satisfaction compared with traditional benzodiazepine‑opioid regimens. 13

Administration Personnel & Safety Profile

• Propofol for ERCP may be administered by an anesthesiologist or by trained non‑anesthesiologist personnel following established protocols; the safety profile of non‑anesthesiologist‑administered propofol (NAAP) is equivalent to standard sedation for low‑risk patients. 14
• Worldwide experience with NAAP encompasses > 460 000 ASA I‑II patients and demonstrates extraordinarily low rates of serious adverse events. 14
• In ERCP specifically, NAAP appears equivalent in safety to standard sedation, although the ERCP‑specific experience base is smaller than for routine endoscopy. 13
• NAAP is more cost‑effective than standard sedation for ERCP and improves practice efficiency. 13

Respiratory Management & Airway Considerations

• Brief apnea episodes lasting 1–37 seconds may occur during propofol MAC but are typically self‑limited; immediate availability of bag‑mask ventilation is recommended. 13
• The need for airway intervention is greater during ERCP than colonoscopy because of prone/semi‑prone positioning and procedural complexity. 13

Cost‑Effectiveness

• NAAP reduces overall sedation costs for ERCP; by contrast, anesthesiologist‑administered sedation adds approximately $150–$1500 per case, depending on local conditions. 13
• The improvements in procedural success, patient satisfaction, and reduced complications associated with propofol‑based techniques justify the additional expense in most clinical settings. 13