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Lung surgery under thoracotomy is known to induce long-term pain which can be considered as neuropathic in many patients concerned [1,2]. The suspected origin of neuropathy is a direct traumatism of intercostal nerve(s) [3]. Among the possible preventive treatments that can be administered during the initial aggression, ketamine [4,5] appears as the easiest to use, as it is already commonly administered intra and postoperatively for improvement of analgesia [6].
Lung surgery under thoracotomy is known to induce long-term pain which can be considered as neuropathic in many patients concerned [1,2]. The suspected origin of neuropathy is a direct traumatism of intercostal nerve(s) [3]. Among the possible preventive treatments that can be administered during the initial aggression, ketamine [4,5] appears as the easiest to use, as it is already commonly administered intra and postoperatively for improvement of analgesia [6]. This study compares two groups of patients undergoing thoracotomy for partial pneumonectomy, one receiving intravenous ketamine since the beginning of procedure and then during 48 hours, the other receiving inactive normal saline (placebo). The study is prospective, randomized, and double-blinded. The primary endpoint is to reduce chronic pain (on visual analogue scale) at the 4th month after surgery with ketamine. The objective is to obtain a mean value under 20/100 in the ketamine group, considering that the expected mean value for the control group is 38/100 (based on personal observations). The secondary endpoints are lower scores of neuropathic pain in the ketamine group, assessed by the NPSI questionnaire [7]. The impact of treatment on quality of life, assessed by a questionnaire (SF-36), is also studied. The data collected by clinical and psychophysical examination performed on all patients at the 4th month after surgery will be also considered for analysis, in order to understand better the features of post-thoracotomy neuropathic pain.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| ketamine | Experimental | This study compares two groups of patients undergoing thoracotomy for partial pneumonectomy, one receiving intravenous ketamine since the beginning of procedure and then during 48 hours, the other receiving inactive normal saline (placebo). |
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| placebo | Other | This study compares two groups of patients undergoing thoracotomy for partial pneumonectomy, one receiving intravenous ketamine since the beginning of procedure and then during 48 hours, the other receiving inactive normal saline (placebo). |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Hypothetica | Drug |
|
| Measure | Description | Time Frame |
|---|---|---|
| Reduction of chronic pain |
| Measure | Description | Time Frame |
|---|---|---|
| Reduction of signs of neuropathic pain. | ||
| Improvement of quality of life. |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Christian Duale, Doctor | University Hospital, Clermont-Ferrand | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Clermont-Ferrand University Hospital | Clermont-Ferrand | Auvergne | 63000 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 10342006 | Background | Perttunen K, Tasmuth T, Kalso E. Chronic pain after thoracic surgery: a follow-up study. Acta Anaesthesiol Scand. 1999 May;43(5):563-7. doi: 10.1034/j.1399-6576.1999.430513.x. | |
| 11394926 | Background | Gotoda Y, Kambara N, Sakai T, Kishi Y, Kodama K, Koyama T. The morbidity, time course and predictive factors for persistent post-thoracotomy pain. Eur J Pain. 2001;5(1):89-96. doi: 10.1053/eujp.2001.0225. |
| Label | URL |
|---|---|
| Related Info | View source |
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| ID | Term |
|---|---|
| D009437 | Neuralgia |
| ID | Term |
|---|---|
| D010523 | Peripheral Nervous System Diseases |
| D009468 | Neuromuscular Diseases |
| D009422 | Nervous System Diseases |
| D010146 | Pain |
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| 11825739 | Background | Rogers ML, Henderson L, Mahajan RP, Duffy JP. Preliminary findings in the neurophysiological assessment of intercostal nerve injury during thoracotomy. Eur J Cardiothorac Surg. 2002 Feb;21(2):298-301. doi: 10.1016/s1010-7940(01)01104-6. |
| 8740606 | Background | Felsby S, Nielsen J, Arendt-Nielsen L, Jensen TS. NMDA receptor blockade in chronic neuropathic pain: a comparison of ketamine and magnesium chloride. Pain. 1996 Feb;64(2):283-291. doi: 10.1016/0304-3959(95)00113-1. |
| 10338169 | Background | Burton AW, Lee DH, Saab C, Chung JM. Preemptive intrathecal ketamine injection produces a long-lasting decrease in neuropathic pain behaviors in a rat model. Reg Anesth Pain Med. 1999 May-Jun;24(3):208-13. doi: 10.1016/s1098-7339(99)90129-3. |
| 11376910 | Background | De Kock M, Lavand'homme P, Waterloos H. 'Balanced analgesia' in the perioperative period: is there a place for ketamine? Pain. 2001 Jun;92(3):373-380. doi: 10.1016/S0304-3959(01)00278-0. |
| 15030944 | Background | Bouhassira D, Attal N, Fermanian J, Alchaar H, Gautron M, Masquelier E, Rostaing S, Lanteri-Minet M, Collin E, Grisart J, Boureau F. Development and validation of the Neuropathic Pain Symptom Inventory. Pain. 2004 Apr;108(3):248-257. doi: 10.1016/j.pain.2003.12.024. |
| 18783971 | Result | Duale C, Sibaud F, Guastella V, Vallet L, Gimbert YA, Taheri H, Filaire M, Schoeffler P, Dubray C. Perioperative ketamine does not prevent chronic pain after thoracotomy. Eur J Pain. 2009 May;13(5):497-505. doi: 10.1016/j.ejpain.2008.06.013. Epub 2008 Sep 9. |
| D009461 |
| Neurologic Manifestations |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |