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Archives of Anesthesiology and Critical Care، جلد ۵، شماره ۱، صفحات ۱۵-۱۷
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عنوان انگلیسی A Comparison of Labetalol and Nitroglycerin for The Management of Intraoperative Hypertension in Ambulatory Surgical Patients Who Underwent Cataract Surgery
چکیده انگلیسی مقاله Background: This is a prospective randomized blinded clinical trial comparing the efficacy and safety of labetalol and nitroglycerin for the management of intraoperative hypertension in ambulatory surgical patients who underwent cataract surgery. Methods: A total of 80 hypertensive patients (systolic blood pressure> 200 mmHg or diastolic blood pressure>100 mmHg) who had increased blood pressure during cataract surgery under topical anesthesia were reviewed. Patients were randomized to receive nitroglycerin (group N, n=40) or labetalol (group L, n=40). The initial dose of nitroglycerin was a bolus of 2 µg/kg and repeat dose of 1ug/kg intravenously every 5 minutes. Labetalol was administered as a bolus of 5 mg followed by 5 mg intravenously as needed every five minutes up to maximum dose of 1 mg/kg. Results: Systolic blood pressure decreased from 21.4±8.6 mm Hg (200 to 260 mm Hg) to 18.8±6.4 mm Hg with administration of nitroglycerin. Labetalol reduced systolic blood pressure from 21.4±6.7 mm Hg (201 to 258 mm Hg) to 17.6±11.6 (p=0.02). Nitroglycerin increased baseline heart rate from 68±8 beats/min to 82±6 beats/min (p=0.04), however, in the labetalol group heart rate reduced from control 72±6 to 64±9 beats/min (P< 0.05). The hypotension episode was 18 (45%) cases in the nitroglycerin group and 2 (5%) cases in the labetalol group respectively (p< 0.05). The mean of systolic blood pressure during their stay in the recovery room in nitroglycerin group was 20.7±9.6 mm Hg and in labetalol group was 18.5±10.2 mm Hg (p< 0.05). Conclusion: Nitroglycerin may produce reflex tachycardia and episode of hypotension especially in elderly patients intraoperatively. Labetalol is a safe and effective antihypertensive agent for management of increased blood pressure during cataract surgery with topical anesthesia.
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نویسندگان مقاله | Mehdi Sanatkar
Department of Anesthesiology, Farabi eye hospital, Tehran University of medical sciences, Tehran, Iran.


| Hossein Sadrossadat
Department of Anesthesiology, Farabi eye hospital, Tehran University of medical sciences, Tehran, Iran.


| Mehrdad Goudarzi
Department of Anesthesiology, Farabi eye hospital, Tehran University of medical sciences, Tehran, Iran.


| Ebrahim Espahbodi
Department of Anesthesiology, Farabi eye hospital, Tehran University of medical sciences, Tehran, Iran.


| Masoumeh Zangeneh
Department of Anesthesiology, Farabi eye hospital, Tehran University of medical sciences, Tehran, Iran.
نشانی اینترنتی http://aacc.tums.ac.ir/index.php/aacc/article/view/220
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