Dexmedetomidine used to provide hypotensive anesthesia during middle ear surgery

  • Farah Nasreen
  • Shahjahan Bano
  • Rashid Manzoor Khan
  • Syed Abrar Hasan
Main Article

Abstract

This study was carried out to assess the hypotensive effect of low dose dexmedetomidine (DEX) infusion during middle ear surgery. 42 ASA grades I and II patients of either sex aged 18–45 years undergoing elective middle ear surgery were randomly divided into two groups of 21 each. Group I received placebo bolus and infusion of saline at a rate similar to DEX in Group II. Group II received 10–15 min prior to induction of anesthesia 1 µg/kg IV bolus DEX diluted in 10 ml of normal saline over 10 min. Immediately thereafter an infusion of 0.4 µg/kg/hr of DEX commenced. Standard anesthetic technique was used. Halothane was titrated to achieve a mean arterial pressure 30% below the control value (value taken just after premedication). We observed that a statistically significant reduction in the percentage of halothane required to reduce MAP 30% below control value occurred in patients receiving DEX infusion (1.3 ± 0.4%) in comparison to those receiving placebo (3.1 ± 0.3%). Patients receiving DEX infusion had a better surgical field. The mean awakening time was significantly reduced in patients of Group II (9.1 ± 2.7 min) when compared to patients of Group I (12.8 ± 2.2 min).

We conclude that DEX can be safely used to provide hypotensive anesthesia during middle ear surgery.

Keywords

Dexmedetomidine Hypotensive anesthesia Middle ear surgery 

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Copyright information

© Association of Otolaryngologists of India 2009

Authors and Affiliations

  • Farah Nasreen
    • 1
  • Shahjahan Bano
    • 1
  • Rashid Manzoor Khan
    • 1
  • Syed Abrar Hasan
    • 2
  1. 1.Department of AnaesthesiologyJ. N. Medical College AMUAligarhIndia
  2. 2.Department of OtorhinolaryngologyJ. N. Medical College AMUAligarhIndia

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