Khalilzadeh M, Panahi G, Rashidian A, Hadian MR, Abdollahi A, Afshari K, Shakiba S, Norouzi-Javidan A, Rahimi N, Momeny M, Dehpour AR
Tehran University of Medical Sciences, Tehran, Iran
A recently developed transdermal fentanyl solution was hypothesized to be effective for non-invasive postoperative analgesia in rats. MATERIALS AND METHODS: Thirty-nine male Sprague-Dawley rats were treated once with 0.1, 0.33 or 1.0 mg/kg transdermal fentanyl solution at the skin of the scruff 1 h prior to subjected to hind-paw surgery, and compared to non-treated animals. All rats were tested for nociceptive response in the electronic von Frey (EVF) test between 1 and 72 h postoperatively, and assessed daily with regards to facial expression, body weight changes and welfare score. RESULTS: Fentanyl treatment at all doses significantly reduced nociceptive response in the EVF test throughout the 72 h of experimentation, reduced facial expressions on all days postoperatively, slightly reduced the body weight and improved postoperative welfare parameters. CONCLUSION: The present study indicates that transdermal fentanyl solution seems to be an effective, non-invasive and long-lasting analgesic regimen in male rats.
BIOSEB Instruments Used:
Von Frey Filaments (Bio-VF-M)