Cookies on this website

We use cookies to ensure that we give you the best experience on our website. If you click 'Accept all cookies' we'll assume that you are happy to receive all cookies and you won't see this message again. If you click 'Reject all non-essential cookies' only necessary cookies providing core functionality such as security, network management, and accessibility will be enabled. Click 'Find out more' for information on how to change your cookie settings.

Hyperalgesia, a component of post-operative pain, is an enhanced responsiveness to painful challenges after the tissue damage caused by an incision. It is important to understand the mechanisms involved in the development of incisional pain, in order to treat the condition appropriately. The aim of this study was to develop a model of post-operative pain using the rat's tail. Under halothane-induced anaesthesia, female Sprague Dawley rats underwent 10 mm longitudinal incisions through skin and fascia (n = 10) or 20 mm incisions through skin, fascia and muscle (n = 10) of the mid-portion of the tail. Control rats were only anaesthetised (n = 14). Withdrawal latencies to noxious mechanical and thermal challenges were recorded daily. A bar algometer was placed onto and 15 mm proximal to the incision with a force of 4 N and the tail was immersed in 49°C water. Daily withdrawal latencies were compared to pre-incision values using one way analysis of variance (ANOVA) with Dunnett's post-hoc test. Primary mechanical hyperalgesia lasted for 6 days after the 10 mm incisions (P < 0.0001) and for 7 days after the 20 mm incisions (P < 0.0001). Secondary mechanical hyperalgesia persisted for 1 day after the 10 mm incisions (P = 0.0013) and for 2 days after the 20 mm incisions (P = 0.0028). Thermal hyperalgesia was not elicited. This model is suitable to examine the mechanisms involved in post-operative pain. © 2005 Elsevier B.V. All rights reserved.

Original publication

DOI

10.1016/j.jneumeth.2005.01.001

Type

Journal article

Journal

Journal of Neuroscience Methods

Publication Date

30/06/2005

Volume

145

Pages

167 - 173