The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries
Purpose: The purpose of this study was to compare the effect of adding different doses of dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries as regards duration, efficacy and pain relief. Materials and methods: In this prospective randomized double blind clin...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2016-10-01
|
| Series: | Egyptian Journal of Anaesthesia |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110184916300757 |
| _version_ | 1819078105134792704 |
|---|---|
| author | Mohamed Hafez Mona Raafat Fahim Mona Hossam Eldin Abdelhamid Maha Mohamed Ismail Youssef Abeer Samir Salem |
| author_facet | Mohamed Hafez Mona Raafat Fahim Mona Hossam Eldin Abdelhamid Maha Mohamed Ismail Youssef Abeer Samir Salem |
| author_sort | Mohamed Hafez |
| collection | DOAJ |
| description | Purpose: The purpose of this study was to compare the effect of adding different doses of dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries as regards duration, efficacy and pain relief.
Materials and methods: In this prospective randomized double blind clinical study, 160 patients were equally divided into four groups: Group C (the control group) (n = 40) received 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase, group D15 (n = 40) received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 15 μg dexmedetomidine, group D20 (n = 40) received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 20 μg dexmedetomidine and group D25 (n = 40) also received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 25 μg dexmedetomidine.
The onset of globe anesthesia and akinesia and their duration, the intraocular pressure (IOP), patient comfort and surgeon satisfaction were all assessed.
Data were analyzed and the results were presented as mean ±SD (Standard Deviation) and Ranges, number (%) and median (IQR) (Inter quartile range). Chi-square test (x2) was used to compare nonparametric variables. Comparison between groups was done using Analysis of Variance (ANOVA-One Way) as a parametric test and Kruskal Wallis Analysis of Variance by ranks as a nonparametric test. P values less than 0.05 (p < 0.05) was considered to be significant.
Results: The onset of globe anesthesia was shorter in dexmedetomidine groups in comparison with control group. The difference was statistically significant in group D25 and group D20 in comparison with the control group (p > 0.05). Regarding the duration of globe analgesia, adding dexmedetomidine to the local anesthetic mixture prolonged the duration of globe analgesia, and this difference was statistically significant in group D25 in comparison with the control group (p > 0.05). Regarding the duration of globe akinesia although there was prolongation of the duration of akinesia in all groups the difference was statistically significant only in group D25 when compared to the control group (p > 0.05). The Verbal Rating Score (VRS) during surgery didn’t show any significant difference when comparing the dexmedetomidine groups (D15, D20 and D25) to the control group or when comparing the four groups to each other (p < 0.05).
Conclusions: Adding dexmedetomidine to a mixture of lidocaine 2% and bupivacaine in peribulbar block shortened sensory and motor block onset, extended the analgesia period and the motor block duration. It also significantly decreased the intraocular pressure and enabled better operating conditions. In this study, the addition of 25 μ dexmedetomidine to the local anesthetic mixture showed the best outcome. |
| first_indexed | 2024-12-21T19:07:48Z |
| format | Article |
| id | doaj.art-ed8495ce2a374b72a17fae7761a83d31 |
| institution | Directory Open Access Journal |
| issn | 1110-1849 |
| language | English |
| last_indexed | 2024-12-21T19:07:48Z |
| publishDate | 2016-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Egyptian Journal of Anaesthesia |
| spelling | doaj.art-ed8495ce2a374b72a17fae7761a83d312022-12-21T18:53:17ZengTaylor & Francis GroupEgyptian Journal of Anaesthesia1110-18492016-10-0132457357910.1016/j.egja.2016.07.005The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeriesMohamed Hafez0Mona Raafat Fahim1Mona Hossam Eldin Abdelhamid2Maha Mohamed Ismail Youssef3Abeer Samir Salem4Department of Anesthesiology, Intensive Care and Pain Medicine, Faculty of Medicine Cairo University, EgyptDepartment of Anesthesiology, Research Institute of Ophthalmology, EgyptDepartment of Anesthesiology, Intensive Care and Pain Medicine, Faculty of Medicine Cairo University, EgyptDepartment of Anesthesiology, Intensive Care and Pain Medicine, Faculty of Medicine Cairo University, EgyptDepartment of Anesthesiology, Research Institute of Ophthalmology, EgyptPurpose: The purpose of this study was to compare the effect of adding different doses of dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries as regards duration, efficacy and pain relief. Materials and methods: In this prospective randomized double blind clinical study, 160 patients were equally divided into four groups: Group C (the control group) (n = 40) received 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase, group D15 (n = 40) received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 15 μg dexmedetomidine, group D20 (n = 40) received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 20 μg dexmedetomidine and group D25 (n = 40) also received a 10 ml mixture of lidocaine 2% and bupivacaine 0.5% with 120 IU of hyaluronidase + 25 μg dexmedetomidine. The onset of globe anesthesia and akinesia and their duration, the intraocular pressure (IOP), patient comfort and surgeon satisfaction were all assessed. Data were analyzed and the results were presented as mean ±SD (Standard Deviation) and Ranges, number (%) and median (IQR) (Inter quartile range). Chi-square test (x2) was used to compare nonparametric variables. Comparison between groups was done using Analysis of Variance (ANOVA-One Way) as a parametric test and Kruskal Wallis Analysis of Variance by ranks as a nonparametric test. P values less than 0.05 (p < 0.05) was considered to be significant. Results: The onset of globe anesthesia was shorter in dexmedetomidine groups in comparison with control group. The difference was statistically significant in group D25 and group D20 in comparison with the control group (p > 0.05). Regarding the duration of globe analgesia, adding dexmedetomidine to the local anesthetic mixture prolonged the duration of globe analgesia, and this difference was statistically significant in group D25 in comparison with the control group (p > 0.05). Regarding the duration of globe akinesia although there was prolongation of the duration of akinesia in all groups the difference was statistically significant only in group D25 when compared to the control group (p > 0.05). The Verbal Rating Score (VRS) during surgery didn’t show any significant difference when comparing the dexmedetomidine groups (D15, D20 and D25) to the control group or when comparing the four groups to each other (p < 0.05). Conclusions: Adding dexmedetomidine to a mixture of lidocaine 2% and bupivacaine in peribulbar block shortened sensory and motor block onset, extended the analgesia period and the motor block duration. It also significantly decreased the intraocular pressure and enabled better operating conditions. In this study, the addition of 25 μ dexmedetomidine to the local anesthetic mixture showed the best outcome.http://www.sciencedirect.com/science/article/pii/S1110184916300757DexmedetomidinePeribulbar blockLocal anesthesiaVitreoretinal surgeries |
| spellingShingle | Mohamed Hafez Mona Raafat Fahim Mona Hossam Eldin Abdelhamid Maha Mohamed Ismail Youssef Abeer Samir Salem The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries Egyptian Journal of Anaesthesia Dexmedetomidine Peribulbar block Local anesthesia Vitreoretinal surgeries |
| title | The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| title_full | The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| title_fullStr | The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| title_full_unstemmed | The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| title_short | The effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| title_sort | effect of adding dexmedetomidine to local anesthetic mixture for peribulbar block in vitreoretinal surgeries |
| topic | Dexmedetomidine Peribulbar block Local anesthesia Vitreoretinal surgeries |
| url | http://www.sciencedirect.com/science/article/pii/S1110184916300757 |
| work_keys_str_mv | AT mohamedhafez theeffectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT monaraafatfahim theeffectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT monahossameldinabdelhamid theeffectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT mahamohamedismailyoussef theeffectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT abeersamirsalem theeffectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT mohamedhafez effectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT monaraafatfahim effectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT monahossameldinabdelhamid effectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT mahamohamedismailyoussef effectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries AT abeersamirsalem effectofaddingdexmedetomidinetolocalanestheticmixtureforperibulbarblockinvitreoretinalsurgeries |