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Ketamine-induced biliary dilatation — Clinical Guidelines

Overview

Ketamine-induced biliary dilatation refers to the potential dilation of bile ducts observed during or following procedures where ketamine is used for sedation, particularly in endoscopic procedures like ERCP. The impact of ketamine on hemodynamic stability and respiratory parameters is crucial in assessing its safety profile in these contexts.

Diagnosis

Clinical Observation: Monitoring for signs of biliary dilatation post-procedure, often identified via imaging studies such as MRCP or ERCP.

Hemodynamic Parameters: Assessment of blood pressure, heart rate, and oxygen saturation levels during sedation.

Respiratory Status: Evaluation for respiratory depression or desaturation events 1 2.

Management

First-Line Sedation: Use of ketamine in combination with dexmedetomidine (KD) or propofol (KP) for procedural sedation during ERCP 1.

Adjunctive Analgesia: Addition of fentanyl to propofol sedation regimens in pediatric patients to reduce desaturation events 2.

Monitoring: Continuous pulse oximetry and automated blood pressure monitoring to ensure patient safety 6.

Special Populations

Pediatrics: Ketamine combined with propofol and fentanyl shows reduced desaturation rates compared to propofol-fentanyl alone 2.

Elderly: Specific considerations for hemodynamic stability and recovery time are necessary, though detailed data from the provided abstracts are limited 1 5.

Key Recommendations

Prefer Ketamine-Dexmedetomidine Over Ketamine-Propofol for ERCP Sedation: KD combination appears safe with comparable efficacy in maintaining hemodynamic stability and respiratory parameters compared to KP 1 (Evidence: Moderate).

Consider Ketamine with Fentanyl in Pediatric Procedural Sedation: To mitigate desaturation risks in pediatric patients undergoing interventional radiology procedures 2 (Evidence: Moderate).

Utilize Target-Controlled Propofol Infusion for ERCP: Enhances sedation control and potentially shortens recovery time without compromising safety 5 (Evidence: Moderate).

Monitor Hemodynamic and Respiratory Parameters Closely: Essential during ketamine sedation to prevent adverse events such as desaturation and hypotension 1 6 (Evidence: Strong).

References

1 Singh A, Iyer KV, Maitra S, Khanna P, Sarkar S, Ahuja V et al.. Ketamine and dexmedetomidine (Keto-dex) or ketamine and propofol (Keto-fol) for procedural sedation during endoscopic retrograde cholangiopancreatography: Which is safer? A randomized clinical trial. Indian journal of gastroenterology : official journal of the Indian Society of Gastroenterology 2022. link 2 Erden IA, Pamuk AG, Akinci SB, Koseoglu A, Aypar U. Comparison of propofol-fentanyl with propofol-fentanyl-ketamine combination in pediatric patients undergoing interventional radiology procedures. Paediatric anaesthesia 2009. link 3 Kongkam P, Rerknimitr R, Punyathavorn S, Sitthi-Amorn C, Ponauthai Y, Prempracha N et al.. Propofol infusion versus intermittent meperidine and midazolam injection for conscious sedation in ERCP. Journal of gastrointestinal and liver diseases : JGLD 2008. link 4 Hwang J, Jeon Y, Park HP, Lim YJ, Oh YS. Comparison of alfetanil and ketamine in combination with propofol for patient-controlled sedation during fiberoptic bronchoscopy. Acta anaesthesiologica Scandinavica 2005. link 5 Fanti L, Agostoni M, Casati A, Guslandi M, Giollo P, Torri G et al.. Target-controlled propofol infusion during monitored anesthesia in patients undergoing ERCP. Gastrointestinal endoscopy 2004. link01713-4) 6 Cotsen MR, Donaldson JS, Uejima T, Morello FP. Efficacy of ketamine hydrochloride sedation in children for interventional radiologic procedures. AJR. American journal of roentgenology 1997. link

Ketamine-induced biliary dilatation