Short Communication - (2025) Volume 8, Issue 4
Received: 01-Aug-2025, Manuscript No. japre-26-181996;
Editor assigned: 04-Aug-2025, Pre QC No. P-181996;
Reviewed: 18-Aug-2025, QC No. Q-181996;
Revised: 22-Aug-2025, Manuscript No. R-181996;
Published:
29-Aug-2025
, DOI: 10.37421/2684-5997.2025.8.309
Citation: Okafor, Yvonne N.. ”Ketamine: Perioperative Pain Management Breakthrough.” J Anesthesiol Pain Res 08 (2025):309.
Copyright: © 2025 Okafor N. Yvonne This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited.
The perioperative setting presents a complex landscape for pain management, necessitating a comprehensive understanding of available pharmacologic agents and their optimal application. Among these agents, ketamine has emerged as a significant player, owing to its distinct mechanism of action and broad efficacy across various pain states. Its primary role as an NMDA receptor antagonist positions it to effectively address conditions such as neuropathic pain, complex regional pain syndrome (CRPS), and the phenomenon of intraoperative opioid-induced hyperalgesia (OIH) [1].
In the realm of postoperative pain control, particularly following major abdominal surgery, low-dose ketamine infusions have demonstrated considerable promise. Studies have indicated that ketamine can substantially reduce the reliance on opioids and lead to improved pain scores during the early postoperative period, without a notable increase in adverse effects such as nausea or hallucinations, thereby supporting its integration into multimodal analgesic regimens for complex surgical procedures [2].
The efficacy and safety of ketamine for managing chronic pain conditions within the perioperative context, including neuropathic pain and fibromyalgia, have been systematically reviewed. Findings suggest that ketamine, especially when administered in sub-anesthetic doses, can provide substantial pain relief and enhance functional status. However, the long-term effectiveness warrants further investigation, and the need for standardized protocols and cautious interpretation due to study design heterogeneity remains critical [3].
The specific role of ketamine in preventing and treating opioid-induced hyperalgesia (OIH) during the perioperative period is an area of active research. OIH, characterized by a paradoxical increase in pain sensitivity due to opioid exposure, can be effectively modulated by ketamine's NMDA antagonism, which impacts central sensitization pathways. This has significant implications for improving overall pain management strategies when used in conjunction with opioids [4].
For patients experiencing severe postoperative pain that has not responded to conventional analgesia, a prospective study evaluated the effectiveness of a ketamine bolus followed by a continuous infusion. The results demonstrated a significant reduction in pain scores and opioid requirements, facilitating earlier patient mobilization. The judicious use of ketamine was concluded to be a valuable adjunct in challenging pain scenarios, with careful monitoring of adverse effects [5].
A comprehensive review of the pharmacokinetics and pharmacodynamics of ketamine in the perioperative setting, specifically for pain management, sheds light on its absorption, distribution, metabolism, and excretion. Understanding these processes is crucial for optimizing its analgesic and anesthetic effects and for making necessary dose adjustments based on individual patient characteristics, such as renal or hepatic function [6].
The utility of ketamine as an adjunct to regional anesthesia for enhanced perioperative analgesia has also been explored. Systematic reviews indicate that combining ketamine with local anesthetics in nerve blocks or epidural infusions can improve the quality and duration of pain relief. This multimodal approach is associated with reduced opioid requirements and a lower incidence of opioid-related side effects [7].
The evolving role of ketamine in pain management, particularly in the context of addressing the opioid crisis, is a subject of ongoing discussion. Its demonstrated efficacy in treating refractory pain syndromes and its potential as a safer alternative or adjunct to opioids in certain perioperative scenarios highlight its growing importance. Further research is encouraged to establish best practices and optimize its integration into clinical workflows [8].
The impact of a single intravenous dose of ketamine on postoperative pain and opioid consumption has been investigated in patients undergoing laparoscopic cholecystectomy. Evidence suggests that administering ketamine prior to surgical incision can significantly reduce pain intensity and opioid requirements within the first 24 hours postoperatively, with a favorable safety profile [9].
A case series explored the application of ketamine in managing complex regional pain syndrome (CRPS) within the perioperative context. The successful use of low-dose ketamine infusions in patients with severe, intractable pain exacerbated by surgical procedures underscores ketamine's ability to interrupt central sensitization and provide substantial relief in challenging CRPS cases [10].
The application of ketamine for both acute and chronic pain management within the perioperative setting is detailed, emphasizing its unique NMDA receptor antagonism mechanism. This mechanism is key to its efficacy in treating conditions like neuropathic pain, complex regional pain syndrome, and intraoperative opioid-induced hyperalgesia. The authors discuss optimal dosing, administration routes, and potential adverse effects, stressing the importance of careful patient selection and monitoring to maximize benefits and minimize risks, with a nod to future directions in multimodal analgesia [1].
Research into the effectiveness of low-dose ketamine infusions for postoperative pain control in patients undergoing major abdominal surgery has shown significant reductions in opioid consumption and improvements in pain scores during the early postoperative period. Crucially, these benefits were observed without an increase in adverse events such as nausea or hallucinations, providing evidence for ketamine's integration into multimodal analgesic regimens for complex surgical procedures [2].
A systematic review and meta-analysis have examined the efficacy and safety of ketamine for chronic pain conditions, including neuropathic pain and fibromyalgia, in the perioperative setting. The findings suggest that sub-anesthetic doses of ketamine can offer significant pain relief and functional improvements, although long-term efficacy requires further study. The review also underscores the need for standardized protocols and cautious interpretation due to heterogeneity in study designs [3].
Evidence suggests that ketamine plays a crucial role in preventing and treating opioid-induced hyperalgesia (OIH) during the perioperative period. By antagonizing NMDA receptors, ketamine can modulate central sensitization pathways, thereby mitigating OIH. This understanding allows for improved overall pain management strategies when ketamine is used in conjunction with opioids [4].
A prospective study evaluated the use of a ketamine bolus followed by a continuous infusion for severe postoperative pain unresponsive to conventional analgesia. The study indicated that ketamine significantly reduced pain scores and opioid requirements, enabling earlier mobilization. The safety profile was monitored, and ketamine was deemed a valuable adjunct in challenging pain scenarios when used judiciously [5].
The pharmacokinetics and pharmacodynamics of perioperative ketamine for pain management are extensively reviewed, providing insight into how ketamine is absorbed, distributed, metabolized, and excreted. This knowledge is vital for understanding how these factors influence its analgesic and anesthetic effects, and for making appropriate dose adjustments based on individual patient characteristics like renal or hepatic function [6].
The utilization of ketamine as an adjunct to regional anesthesia for enhanced perioperative analgesia has been explored through systematic reviews. Combining ketamine with local anesthetics in regional blocks or epidural infusions has shown to improve the quality and duration of pain relief, while simultaneously reducing opioid requirements and the incidence of opioid-related side effects [7].
An editorial highlights the reemerging role of ketamine in pain management, particularly in the context of the opioid crisis. Its efficacy in treating difficult pain syndromes and its utility as a safer alternative or adjunct to opioids in specific perioperative situations are emphasized. The authors advocate for further research to establish best practices and optimize its clinical integration [8].
A randomized double-blind placebo-controlled trial investigated the effect of a single preoperative intravenous ketamine dose on postoperative pain and opioid consumption in patients undergoing laparoscopic cholecystectomy. The findings indicated a significant reduction in pain intensity and opioid consumption in the first 24 hours postoperatively, with a favorable safety profile [9].
A case series explored the perioperative application of ketamine infusions for complex regional pain syndrome (CRPS). This series detailed the successful management of several patients with severe, intractable pain exacerbated by surgical procedures, highlighting ketamine's role in interrupting central sensitization and providing significant pain relief in challenging CRPS cases [10].
Ketamine is a valuable agent in perioperative pain management due to its NMDA receptor antagonism, effectively treating conditions like neuropathic pain and opioid-induced hyperalgesia. Studies demonstrate its efficacy in reducing opioid consumption and improving pain scores post-surgery, including after major abdominal procedures and laparoscopic cholecystectomy. Ketamine shows promise as an adjunct to regional anesthesia and in managing refractory pain and complex regional pain syndrome. Research also focuses on its pharmacokinetics, pharmacodynamics, and its potential role in addressing the opioid crisis. Optimal use involves careful patient selection, dosing, and monitoring to maximize benefits and minimize risks.
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