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Year : 2019  |  Volume : 13  |  Issue : 4  |  Page : 625-630

Intravenous Fentanyl 4 μg per kg administered before scalp pin application is inferior to scalp block in preventing hemodynamic changes

1 Department of Anesthesiology, Karwar Institute of Medical Sciences, Karwar, Karnataka, India
2 Department of Anesthesiology, Kodagu Institute of Medical Sciences, Madikeri, Karnataka, India

Correspondence Address:
Pradeep Hosagoudar
Professor and HOD, Department of Anesthesiology, Kodagu Institute of Medical Sciences, Madikeri - 571 201, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/aer.AER_107_19

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Background: Application of scalp pins for craniotomy surgeries is a noxious stimulus, causing tachycardia and hypertension, resulting in increased cerebral blood flow and elevated intracranial pressure, hence measures to attenuate this will have beneficial role. Aims: The aim is to compare the effectiveness of scalp block (SB) to 4 μ intravenous (i.v) fentanyl in attenuating hemodynamic response to scalp pin application in patients who underwent elective craniotomy under general anesthesia. Settings and Design: The study design involves prospective, randomized study conducted at Tertiary care center/hospital. Subjects and Methods: Forty-four American Society of Anesthesiologists physical status Classes l and II patients were randomly allocated into the following groups: Group-SB (n = 22) received SB using 0.25% injection bupivacaine and Group-F (n = 22) received 1 μ i.v fentanyl. Patient's heart rate (HR) and mean arterial pressure (MAP) were recorded from the application of pins till 60 min and rescue analgesic/anesthetic agents and their dosage were noted. Statistical analysis was performed comparing HR and MAP changes to application of scalp pins. Statistical Analysis: Software developed by the Centre for Disease Control, Atlanta, namely Epidemiological Information Package 2010 was used to derive statistical variables. Results: Patients were comparable in age, gender, hypertension as comorbidity, baseline HR, and MAP. Significant rise in HR was noted in Group-F till 20th min compared to Group-SB. MAP was high from application of pins till 60th min in Group-F compared to Group-SB. Requirement of rescue analgesics/anesthetics was high in Group-F compared to Group-SB. \Conclusion: SB effectively attenuates hemodynamic response to application of scalp pins in patients undergoing elective craniotomy and reduces requirement of rescue analgesic and/or anesthetics.

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