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Eur J Pain. 2015 Nov;19(10):1428-36. doi: 10.1002/ejp.673. Epub 2015 Mar 12.

Effects of β2 agonists on post-thoracotomy pain incidence.

Author information

1
Centre d'Evaluation et de Traitement de la Douleur, Hôpitaux Universitaires de Strasbourg, Université de Strasbourg, France.
2
Département d'Anesthésie-Réanimation Chirurgicale, Hôpitaux Universitaires de Strasbourg, Université de Strasbourg, France.
3
Département de Pathologies Thoraciques, Hôpitaux Universitaires de Strasbourg, Université de Strasbourg, France.
4
Service de Santé Publique, Hôpitaux Universitaires de Strasbourg, Université de Strasbourg, France.
5
Institut des Neurosciences Cellulaires et Intégratives, Centre National de la Recherche Scientifique, France.

Abstract

BACKGROUND:

Pre-clinical research has shown β2 -adrenoceptors to be essential for the antiallodynic action of antidepressant drugs in murine models of neuropathic pain and that sustained treatment with β2 -agonists has an antiallodynic action. Here, we clinically investigated whether chronic β2 -agonist treatments may influence the incidence of post-thoracotomy chronic pain, defined as pain that recurs or persists along a thoracotomy scar more than 2 months after surgery, either neuropathic or non-neuropathic.

METHODS:

We conducted an epidemiological study on patients operated by thoracotomy. Demographic data, medical history and treatments concomitant to the surgery were recorded at a follow-up visit. Information on perioperative treatments was collected from the anaesthesia records and confirmed by the patients. In patients with pain at the surgery level, post-thoracotomy chronic pain was assessed by clinical examination and numeric scale. Physical examination and DN4 questionnaire were used to discriminate neuropathic and non-neuropathic chronic pain at scar level.

RESULTS:

One hundred and eighty-nine patients were included. Eighty-one patients reported persisting thoracic pain, with neuropathic characteristics in 58 of them (30% of the 189 patients). The most common chronic drugs during the perioperative period were inhaled β2 -agonists (28.6%). The chronic use of β2 -agonists was an independent predictor of thoracic neuropathic pain (but not of non-neuropathic pain) and was associated with a five-fold decrease in the relative incidence of neuropathic pain [OR = 0.19 (0.06-0.45)].

CONCLUSIONS:

These data suggest a possible influence of chronic β2 -agonist treatments on neuropathic pain secondary to thoracotomy. This apparent preventive effect of β2 -agonist treatments should warrant controlled clinical trials.

PMID:
25766791
DOI:
10.1002/ejp.673
[Indexed for MEDLINE]

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