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• W2130752646 abstract "Study objective Prostaglandins (PGs) generated in the spinal cord may play a major role in pain perception. Consequently, the suppression of spinal cyclooxygenase (COX) and PG formation may contribute to the analgesic effect of nonsteroidal anti-inflammatory drugs (NSAIDs) in pain following surgery. Which isoform of COX is responsible for postsurgical pain and, consequently, should be targeted, is unclear. Design Prospective randomized blinded study. Setting University teaching hospital. Patients Thirty patients undergoing thoracotomy for lobectomy were recruited. Interventions Patients were randomized to receive the COX-2 selective inhibitor nimesulide, 100 mg orally twice daily, or ibuprofen (nonselective), 400 mg orally three times daily, in an open-label study. In addition, there was a randomized control group that received no NSAIDs. Cerebrospinal fluid (CSF) was analyzed for 6-keto-PGF1α, the principle metabolite of prostacyclin. COX-1 and COX-2 activity was determined by measuring serum thromboxane (TX) B2 and endotoxin-induced PGE2 generation in whole blood. Measurements Pain perception was measured by visual analog scores, and blinded assessment of opioid analgesic requirements and expiratory peak flow measurements were performed. Results At the doses used, nimesulide was selective for COX-2, while ibuprofen was nonselective based on serum TXB2 levels. The mean (± SEM) levels of 6-keto-PGF1α in CSF increased following surgery from 32 ± 4.9 to 127 ± 29 pg/mL (p < 0.001), and this was suppressed by nimesulide (49 ± 9.3 pg/mL; p = 0.0025) but not by ibuprofen (122 ± 35 pg/mL). Pain scores (p < 0.001), morphine requirement (p = 0.0175), and the fall in peak expiratory flow rate (p < 0.001) were significantly lower in the nimesulide group. Conclusions Increases in spinal PG synthesis after thoracotomy are repressed by a selective COX-2 inhibitor. This suggests that the inducible COX-2 mediates central PG synthesis, which may be important in the generation of pain, as the use of nimesulide also resulted in significant decreases in postoperative pain perception. Prostaglandins (PGs) generated in the spinal cord may play a major role in pain perception. Consequently, the suppression of spinal cyclooxygenase (COX) and PG formation may contribute to the analgesic effect of nonsteroidal anti-inflammatory drugs (NSAIDs) in pain following surgery. Which isoform of COX is responsible for postsurgical pain and, consequently, should be targeted, is unclear. Prospective randomized blinded study. University teaching hospital. Thirty patients undergoing thoracotomy for lobectomy were recruited. Patients were randomized to receive the COX-2 selective inhibitor nimesulide, 100 mg orally twice daily, or ibuprofen (nonselective), 400 mg orally three times daily, in an open-label study. In addition, there was a randomized control group that received no NSAIDs. Cerebrospinal fluid (CSF) was analyzed for 6-keto-PGF1α, the principle metabolite of prostacyclin. COX-1 and COX-2 activity was determined by measuring serum thromboxane (TX) B2 and endotoxin-induced PGE2 generation in whole blood. Pain perception was measured by visual analog scores, and blinded assessment of opioid analgesic requirements and expiratory peak flow measurements were performed. At the doses used, nimesulide was selective for COX-2, while ibuprofen was nonselective based on serum TXB2 levels. The mean (± SEM) levels of 6-keto-PGF1α in CSF increased following surgery from 32 ± 4.9 to 127 ± 29 pg/mL (p < 0.001), and this was suppressed by nimesulide (49 ± 9.3 pg/mL; p = 0.0025) but not by ibuprofen (122 ± 35 pg/mL). Pain scores (p < 0.001), morphine requirement (p = 0.0175), and the fall in peak expiratory flow rate (p < 0.001) were significantly lower in the nimesulide group. Increases in spinal PG synthesis after thoracotomy are repressed by a selective COX-2 inhibitor. This suggests that the inducible COX-2 mediates central PG synthesis, which may be important in the generation of pain, as the use of nimesulide also resulted in significant decreases in postoperative pain perception." @default.
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• W2130752646 date "2004-04-01" @default.
• W2130752646 modified "2023-09-27" @default.
• W2130752646 title "Spinal Prostaglandin Formation and Pain Perception Following Thoracotomy" @default.
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• W2130752646 doi "https://doi.org/10.1378/chest.125.4.1321" @default.
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