Journals / Anestezi Dergisi / 2007 / Cilt: 15 - Sayı: 4

Evaluation of the analgesic efficacy and neurotoxicity of intrathecally administered esmolol in rats

Sıçanlarda intratekal uygulanan esmolol'ün analjezik etkinliğinin ve nörotoksisitesinin değerlendirilmesi

Pages
223–227
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Conclusion: In conclusion, this study, in which esmolol was used for the first time intrathecally, shows that 4 mg esmolol provides analgesia for 30 minutes without any motor block or histhopathological toxicity.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Objective: The aim of this study was to evaluate the analgesic effect and toxicity at spinal level when esmolol is administered intrathecally in rat.
📊
Key Findings & Data:Methods: In this study, 24 Wistar rats were used.
💡
Conclusion & Impact:Conclusion: In conclusion, this study, in which esmolol was used for the first time intrathecally, shows that 4 mg esmolol provides analgesia for 30 minutes without any motor block or histhopathological toxicity.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Analjezikler · Enjeksiyon · spinal

Abstract

Objective: The aim of this study was to evaluate the analgesic effect and toxicity at spinal level when esmolol is administered intrathecally in rat. Methods: In this study, 24 Wistar rats were used. The rats were divided into four groups: 0.9 % NaCl was administered intrathecally to Group 1 (control); esmolol 1 mg to Group 2; 2 mg to Group 3; 4 mg to Group 4 in 10 JIL volume each. Tail-flick tests were performed on all groups, before administering drug (0) and at 5,10, 20, 30, 45, 60 and 90 minutes after drug administration. Motor block was also evaluated at these times. Samples of spinal cord were taken to evaluate neurotoxicity. Results: When compared with the control group there was no difference in tail flick times between group 2 and 3. In the fourth group however the Tail-Flick times at 5, 10 20 and 30 min were significantly longer than in the other groups (p<0.05). Motor block did not developed in either group after IT administration of esmolol. There were no statistically significant histopathological changes and histopathological scores were 0 in each group (p>0.05). Conclusion: In conclusion, this study, in which esmolol was used for the first time intrathecally, shows that 4 mg esmolol provides analgesia for 30 minutes without any motor block or histhopathological toxicity.

Özet

Amaç: Bu çalışma ile sıçanlara intratekal uygulanan esmololün spinal düzeyde analjezik etkinliğinin olup olmadığı ve spinal korddaki histopatolojik etkisinin araştırılması amaçlandı. Yöntem: Çalışmada 24 adet Wistar sıçan kullanıldı. Sıçanlar dört gruba ayrılarak, 10 JİL volüm içinde Grup Ve %0.9 NaCl (kontrol grubu), Grup 2'ye 1 mg esmolol, Grup 3'e 2 mg esmolol, Grup 4'e 4 mg esmolol önceden yerleştirilmiş olan intratekal kateterden uygulandı. İlaç uygulamasından önce (0) ve uygulandıktan sonraki 5, 10, 20, 30, 45, 60 ve 90. dakikalarda, sıçanlara "Tail-Flick" testi uygulandı. Motor blok değerlendirmesi de yukarıda belirtilen süre ve zaman aralıklarında gerçekleştirildi. Nörotoksisite araştırması için medulla spinalisten kesitler alındı. Bulgular: Kontrol grubu ile karşılaştırıldığında grup 2 ve 3'de "Tail-Flick" süreleri arasında istatistiksel olarak anlamlı bir fark saptanmazken Grup 4' de "Tail-Flick" süreleri 5,10, 20 ve 30 dakikalarda diğer gruplara göre anlamlı olarak daha uzun bulundu (p 0.05). Sonuç: Bu araştırmada sıçanlara intratekal uygulanan 4 mg esmolol bolus doz ile motor blok görülmeden 30 dakika süren analjezi sağlanmıştır. Ayrıca histopatolojik olarak nörotoksisite bulgularına rastlanmamıştır.

🔖

Cite This Article

ÖĞÜN, E., KÜÇÜKGÜÇLÜ, S., KUVAKİ, B., YILMAZ, O., BAĞRIYANIK, A., GÜNELİ, E. (2007). Evaluation of the analgesic efficacy and neurotoxicity of intrathecally administered esmolol in rats. Anestezi Dergisi, Cilt: 15 - Sayı: 4, 223–227. https://ajindex.com/articles/214018

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (12)

  1. Cunha FQ, Lorenzetti BB, Poole S, Ferreira SH. Interleukin-8 as a mediator of sympathetic pain. Br J Pharmacol 1991; 104:165-1
  2. Davidson EM, Doursout MF, Szmuk P, Chelly JE. Antinociceptive and cardiovascular properties of esmolol following formalin injection in rats. Can J Anaesth 2001; 48: 59-64
  3. Johansen JW, Flaishon R, Sebel PS. Esmolol reduces anesthetic requirement for skin incision during propofol/nitrous oxide/ morphine anesthesia. Anesthesiology 1997; 86: 364-71
  4. Menigaux C, Guignard B. Esmolol prevents movement and attenuates the BIS response to orotracheal intubation. Br J Anaesth 2002; 89: 857-62
  5. Yaksh TL, Rudy TA. Chronic catheterization of the spinal suba-rachnoid space. Physiology Behavior 1976; 17: 1031-6
  6. Korkmaz HA, Maltepe F, Erbayraktar S, Yılmaz O ve ark. Anti-nociceptive and neurotoxicologic screening of chronic intrathecal administration of ketorolac tromethamine in the rat. Anesth Analg 2004; 98: 148-52
  7. Karasawa S, Ishizaki K, Goto F. The effect of intrathecal administration of magnesium sulphate in rats. Anaesthesia 1998; 53: 879-86
  8. Malinovsky JM, Cozian A, Lepage JY, Mussini JM, Pinaud M, Souron R. Ketamin and midazolam neurotoxicity in the rabbit. Anesthesiology 1991; 75: 91-7
  9. Taira Y, Kakinohana O, Okuda Y. ONO 1101, A novel ultra-short acting Bl blocker, can reduce pain behaviour in the rat formalin test. Anesthesiology 1998; A1128: 89
  10. Kaplan JA. Role of ultrashort-acting beta-blokers in the periope-rative period. Cardiothoracic Anesth 1988; 2: 682-91
  11. Chidlow G, Melena J, Osborne NN. Betaxolol, a Bl-adrenoceptor antagonist, reduces Na+ influx into cortical synaptosomes by direct interaction with Na+ channels: comparison with other 8-adrenoceptor antagonists. Br J Pharmacol 2000; 130: 759-66
  12. Masaki E. Antinociceptive effects of landiolol and esmolol. Masui 2006; 55: 849-55.