Kehlet, Anesth Analg 1993 - The Value of "Multimodal" or "Balanced Analgesia" in Postoperative Pain Treatment

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The Value of "Multimodal" or "Balanced Analgesia" in Postoperative Pain Treatment

Kehlet, Dahl·Anesth Analg·1993·1,471 citations·Review article

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This review lays out the rationale and evidence for multimodal (balanced) analgesia in postoperative pain. It asks whether combining analgesics acting at different sites beats single-drug treatment. The focus is on moderate-to-severe pain and relief during function, not just at rest.

Key Findings

Adding an opioid to an epidural bupivacaine infusion improved analgesia in every study reviewed. The reverse (adding local anesthetic to an epidural opioid) worked in only 3 of 8 studies. This asymmetry is why a bupivacaine base with opioid is the more reliable combination.
The benefit of combination therapy over opioid alone appeared only during function (cough, mobilization, exercise), not at rest. This matters because relieving pain during movement, not just at rest, is the actual goal of postoperative analgesia.
A fixed-dose combination of piroxicam plus opioid improved analgesia after total hip replacement. This supports NSAIDs as a rational adjunct in orthopedic pain rather than a standalone agent.
Adding systemic piroxicam 20-40 mg daily to an already effective epidural bupivacaine-opioid regimen did NOT improve rest, cough, or mobilization pain. The ceiling effect means piling drugs onto an optimized epidural gives diminishing returns.
Epidural clonidine (19-25 pg/h) increased analgesic power but caused hypotension in all three randomized trials. Its opioid-sparing, non-respiratory side-effect profile is attractive, but the hypotension limits routine use at these doses.
Epidural versus IV lipophilic opioids (fentanyl, sufentanil, alfentanil) showed no difference in analgesia or side effects. Only morphine and diamorphine gain a real advantage from the epidural route.

Board PearlNo single drug relieves postoperative pain during movement without significant side effects; combining analgesics at different sites gives better function-based relief at lower doses.

The Value of "Multimodal" or "Balanced Analgesia" in Postoperative Pain Treatment

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|

The Value of "Multimodal" or "Balanced Analgesia" in Postoperative Pain Treatment

Kehlet, Dahl·Anesth Analg·1993·1,471 citations·Review article

|

This review lays out the rationale and evidence for multimodal (balanced) analgesia in postoperative pain. It asks whether combining analgesics acting at different sites beats single-drug treatment. The focus is on moderate-to-severe pain and relief during function, not just at rest.

Key Findings

Adding an opioid to an epidural bupivacaine infusion improved analgesia in every study reviewed. The reverse (adding local anesthetic to an epidural opioid) worked in only 3 of 8 studies. This asymmetry is why a bupivacaine base with opioid is the more reliable combination.
The benefit of combination therapy over opioid alone appeared only during function (cough, mobilization, exercise), not at rest. This matters because relieving pain during movement, not just at rest, is the actual goal of postoperative analgesia.
A fixed-dose combination of piroxicam plus opioid improved analgesia after total hip replacement. This supports NSAIDs as a rational adjunct in orthopedic pain rather than a standalone agent.
Adding systemic piroxicam 20-40 mg daily to an already effective epidural bupivacaine-opioid regimen did NOT improve rest, cough, or mobilization pain. The ceiling effect means piling drugs onto an optimized epidural gives diminishing returns.
Epidural clonidine (19-25 pg/h) increased analgesic power but caused hypotension in all three randomized trials. Its opioid-sparing, non-respiratory side-effect profile is attractive, but the hypotension limits routine use at these doses.
Epidural versus IV lipophilic opioids (fentanyl, sufentanil, alfentanil) showed no difference in analgesia or side effects. Only morphine and diamorphine gain a real advantage from the epidural route.

Board PearlNo single drug relieves postoperative pain during movement without significant side effects; combining analgesics at different sites gives better function-based relief at lower doses.

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