Evaluation of The Effect of Using Magnesium Sulfate in Peribulbar Block for Cataract Surgery


  • Isam.H Gaddaf Eldam Suhil El-Atrash Hospital,and Benghazi Medical Center (BMC), Benghazi -Libya.
  • Ayman Salah Eldeen Abdelsalsm Department of Anesthesia and Surgical ICU. ,Faculty of Medicine, Tobruk University , Tobruk -Lybia. Department of Ophthamology, Faculty of Medicine , Tobruk University , Tobruk -Lybya .
  • Gumma Almusmary Department of Biochemistry, Faculty of Medicine ,Tobruk University , Tobruk -Lybya.
  • Awad M Alhasnony Department of Biochemistry, Faculty of Medicine , Omar Almokhtar University , Elbeida-Lybya
  • Osama H. Aldeeb


Magnesium Sulfate, Peribulbar Block, Cataract


Background: Magnesium Sulfate has been used along with local anesthetics in different regional blocks and found to be effective in decreasing the time of onset of the block and increasing the duration of the block. Objective: To evaluate the effect of addition of Magnesium Sulfate to Lidocaine on the time of onset of the sensory block, the globe and lid akinesia for peribulbar block in     cataract surgeries. Patients and Methods: Sixty patients with American Society of Anesthesiologists    physical  status I to II (ASA I & II) undergoing cataract surgery under peribulbar block were included in this study. Patients were randomized into two groups 30 patients each: Group I (Control group): patients received a peribulbar block using a mixture of 5ml Lidocaine 2% and 1ml normal saline 0.9%.

Group II (magnesium group): patients received a peribulbar block using 5ml Lidocaine 2% and Magnesium Sulfate 10% (50mg) diluted in 1 ml normal saline 0.9%. The onset of loss of corneal sensation,  globe and lid akinesia and complications were  observed and recorded.

Results: Patients received Magnesium Sulfate showed significantly rapid onset of      complete loss of corneal sensation(P = 0.036), and significantly rapid onset of partial and complete lid and globe akinesia (P < 0.001) and (P < 0.001) respectively. Conclusion: Addition of 50 mg of Magnesium Sulfate to the Lidocaine for peribulbar block decreases the onset of sensory block and akinesia without any obvious side effect.


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Isam.H Gaddaf Eldam, Ayman Salah Eldeen Abdelsalsm, Gumma Almusmary, Awad M Alhasnony, and Osama H. Aldeeb. “Evaluation of The Effect of Using Magnesium Sulfate in Peribulbar Block for Cataract Surgery”. International Journal of Pharmaceutics and Drug Analysis, Jan. 2020, pp. 5-11, https://ijpda.com/index.php/journal/article/view/433.



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