Related Experiment Video
Updated: Apr 24, 2026

Assessment of Knee Hyperalgesia in Mice using Pressure Application Measurement
Published on: June 13, 2025
Effect of dexmedetomidine on postoperative pain in knee arthroscopic surgery; a randomized controlled clinical trial
Mohammad Alipour1, Masoomeh Tabari1, Reza Farhadi Faz1
1Mohammad Alipour MD, Masoomeh Tabari MD, Reza Farhadifaz MD, Department of Anesthesiology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Background:
Various drugs are administered intra-articularly to provide postoperative analgesia after arthroscopic knee surgery. The purpose of this study was to assess the analgesic effects of intra-articular injection of a dexmedetomidine following knee arthroscopy.
Methods:
Forty six patients scheduled for arthroscopic knee surgery under general anaesthesia, were randomly devided into two groups. Intervention group received 1µg/kg dexmedetomidine (D) and isotonic saline. Control group received 25ml isotonic saline (P). Analgesic effects were evaluated by measuring pain intensity (VAS scores) and duration of analgesia.
Results:
There was no significant difference between the two groups in terms of age, sex and weight. The mean of post-operation pain severity in 1, 3, 6,12, and 24 h was significantly lower in the intervention group (D) in comparison with the control group (P). the mean of the total dose of tramadol consumption was significantly lower in the intervention group in comparison with the control group (P<0.001).
Conclusions:
Intra-articular injection of dexmedetomidine at the end of arthroscopic knee surgery, alleviates the patients' pain, reducing the postoperative need for narcotics as analgesics, and increase the first analgesic request after operation.
Related Concept Videos
Parenteral Anesthetics: Overview
Analgesia and Pain Management
Local Anesthetics: Clinical Application as Epidural Anesthesia
Since epidural anesthetics can be infused through an epidural catheter, all types of drugs, including short-acting ones, can be administered. Chloroprocaine and lidocaine are examples of short and long-duration anesthetics, respectively. Bupivacaine...
Skeletal Muscle Relaxants: Adverse Effects
Unlike...
Opioid Analgesics: Synthetic and Semisynthetic Opioids
Skeletal Muscle Relaxants: Therapeutic Uses
