Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial
Introduction: Microscopic middle ear surgeries are best done under hypotensive anaesthesia to provide an oligaemic field. Dexmedetomidine is an α2 agonist which produces hypotension by sympathetic response blockade. Aim: To study the effectiveness of low dose dexmedetomidine in providing an oligaem...
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JCDR Research and Publications Private Limited
2022-09-01
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| Series: | Journal of Clinical and Diagnostic Research |
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| Online Access: | https://jcdr.net/articles/PDF/16848/52943_CE_[Ra1]_F(SHU)_PF1(SC_SS)_PFA(SC_KM)_PN(KM).pdf |
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| author | Nitin Agrawal Smriti Sinha Reena R Kadni Shekhar Ramkrishnan |
| author_facet | Nitin Agrawal Smriti Sinha Reena R Kadni Shekhar Ramkrishnan |
| author_sort | Nitin Agrawal |
| collection | DOAJ |
| description | Introduction: Microscopic middle ear surgeries are best done under hypotensive anaesthesia to provide an oligaemic field. Dexmedetomidine is an α2 agonist which produces hypotension by sympathetic response blockade.
Aim: To study the effectiveness of low dose dexmedetomidine in providing an oligaemic field. The additional requirement of inhalational agent required to maintain the oligaemic field in the control group, intubation response and postoperative analgesia were also assessed.
Materials and Methods: The randomised, placebo-controlled double-blind study was conducted from January to December 2013 by recruiting 48 patients in the study, who were divided into two groups i.e, study group (n=24) and placebo group (n=24). The study group received low dose dexmedetomidine infusion (0.5 μg/kg loading dose followed by 0.2 μg/kg/hr) and placebo group received weight-adjusted saline. The quality of the surgical field was assessed on a score of 0-5. The Minimum Alveolar Concentration (MAC) of inhalational agent needed, postoperative sedation score and pain score were noted. All the data were recorded in Statistical Package for Social Sciences (SPSS) software, version 22.0.
Results: The mean score of quality of the surgical field in the study group was 2.00±0.59, compared to 3.50±0.88 in the placebo group. The mean MAC of isoflurane was 1.32±0.31 in the placebo group and 0.85±0.23 in the study group (p-value=0.03). The study group had a Ramsay sedation score of 3.08±0.65 compared to 2.29±0.75 in the placebo group at 5 minutes after extubation (p-value <0.001). The mean pain score in the dexmedetomidine group in 10 minutes postoperative period was 1.83±2.25, while in placebo group it was 3.25±1.96 (p-value=0.025). However, over the next 20-60 minutes postoperative period the pain score between the two groups were comparable, with no significant difference in analgesia, postoperative shivering and other side-effects.
Conclusion: A low dose dexmedetomidine can effectively provide a bloodless field for middle ear microsurgical procedures. |
| first_indexed | 2024-04-10T08:43:33Z |
| format | Article |
| id | doaj.art-4ec56aa92da34a1fa0daadb9bb780daf |
| institution | Directory Open Access Journal |
| issn | 2249-782X 0973-709X |
| language | English |
| last_indexed | 2024-04-10T08:43:33Z |
| publishDate | 2022-09-01 |
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| series | Journal of Clinical and Diagnostic Research |
| spelling | doaj.art-4ec56aa92da34a1fa0daadb9bb780daf2023-02-22T11:54:16ZengJCDR Research and Publications Private LimitedJournal of Clinical and Diagnostic Research2249-782X0973-709X2022-09-01169UC19UC2310.7860/JCDR/2022/52943.16848Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control TrialNitin Agrawal0Smriti Sinha1Reena R Kadni2Shekhar Ramkrishnan 3Assistant Professor, Department of Anaesthesiology, Rohilkhand Medical College and Hospital, Bareilly, Uttar Pradesh, India.DrNB Trainee Critical Care Medicine, Department of Critical Care Medicicne, Tata Main Hospital, Jamshedpur, Jharkhand, India.Senior Consultant, Department of Anaesthesiology, Bangalore Baptist Hospital, Bengaluru, Karnataka, India.Senior Consultant, Department of Anaesthesiology, Bangalore Baptist Hospital, Bengaluru, Karnataka, India.Introduction: Microscopic middle ear surgeries are best done under hypotensive anaesthesia to provide an oligaemic field. Dexmedetomidine is an α2 agonist which produces hypotension by sympathetic response blockade. Aim: To study the effectiveness of low dose dexmedetomidine in providing an oligaemic field. The additional requirement of inhalational agent required to maintain the oligaemic field in the control group, intubation response and postoperative analgesia were also assessed. Materials and Methods: The randomised, placebo-controlled double-blind study was conducted from January to December 2013 by recruiting 48 patients in the study, who were divided into two groups i.e, study group (n=24) and placebo group (n=24). The study group received low dose dexmedetomidine infusion (0.5 μg/kg loading dose followed by 0.2 μg/kg/hr) and placebo group received weight-adjusted saline. The quality of the surgical field was assessed on a score of 0-5. The Minimum Alveolar Concentration (MAC) of inhalational agent needed, postoperative sedation score and pain score were noted. All the data were recorded in Statistical Package for Social Sciences (SPSS) software, version 22.0. Results: The mean score of quality of the surgical field in the study group was 2.00±0.59, compared to 3.50±0.88 in the placebo group. The mean MAC of isoflurane was 1.32±0.31 in the placebo group and 0.85±0.23 in the study group (p-value=0.03). The study group had a Ramsay sedation score of 3.08±0.65 compared to 2.29±0.75 in the placebo group at 5 minutes after extubation (p-value <0.001). The mean pain score in the dexmedetomidine group in 10 minutes postoperative period was 1.83±2.25, while in placebo group it was 3.25±1.96 (p-value=0.025). However, over the next 20-60 minutes postoperative period the pain score between the two groups were comparable, with no significant difference in analgesia, postoperative shivering and other side-effects. Conclusion: A low dose dexmedetomidine can effectively provide a bloodless field for middle ear microsurgical procedures.https://jcdr.net/articles/PDF/16848/52943_CE_[Ra1]_F(SHU)_PF1(SC_SS)_PFA(SC_KM)_PN(KM).pdfbloodless surgical fieldcontrolled hypotensionhypotensive anaesthesia |
| spellingShingle | Nitin Agrawal Smriti Sinha Reena R Kadni Shekhar Ramkrishnan Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial Journal of Clinical and Diagnostic Research bloodless surgical field controlled hypotension hypotensive anaesthesia |
| title | Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial |
| title_full | Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial |
| title_fullStr | Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial |
| title_full_unstemmed | Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial |
| title_short | Effectiveness of Low Dose Dexmedetomidine for an Oligaemic Field in Middle Ear Surgery: A Randomised Control Trial |
| title_sort | effectiveness of low dose dexmedetomidine for an oligaemic field in middle ear surgery a randomised control trial |
| topic | bloodless surgical field controlled hypotension hypotensive anaesthesia |
| url | https://jcdr.net/articles/PDF/16848/52943_CE_[Ra1]_F(SHU)_PF1(SC_SS)_PFA(SC_KM)_PN(KM).pdf |
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