The Effect of Dexmedetomidine on Hemodynamic Response During Double Lumen Endotracheal Intubation

Chiang Mai University

Status and phase: Completed; Phase 2

Conditions: Hypertension; Tachycardia; High Blood Pressure; Anesthesia Intubation Complication; Tracheal Intubation Morbidity; Intubation Complication

Treatments: Drug: Dexmedetomidine; Drug: Placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT01289769

research ID 77 (Other Identifier)

COM-10-11-19B-11

Details and patient eligibility

About

The purpose of this study is to evaluate the effect of dexmedetomidine on hemodynamic responses during laryngoscopy and double lumen endotracheal intubation and assess the adverse effect related to complications of dexmedetomidine.

Full description

The cardiovascular responses to laryngoscopy and tracheal intubation are mediated by both sympathetic and parasympathetic nervous system. The hemodynamic responses resulting from sympathetic nervous system stimulation are tachycardia, cardiac arrhythmias, hypertension, increased intraocular pressure, increased intracranial pressure, bronchospasm and myocardial ischemia. Tachycardia is one of the major predictor of intraoperative myocardial ischemia and causes an imbalance of myocardial oxygen supply and demand. Although hemodynamic responses to laryngoscopy and intubation is transient, these effect may be harmful to patients suffering from myocardial and cerebrovascular diseases. The placement of double lumen endotracheal tube may produce similar or greater pressor response than endotracheal tube because of larger sizes and greater carinal stimulation.

Enrollment: 60 patients

Sex: All

Ages: 18 to 65 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• ASA Physical Status I-III
• Undergoing Elective Thoracotomy or Thoracoscopy
• Required Left Sided-double Lumen Endotracheal Intubation

Exclusion criteria

• Patients with bradycardia (heart rate < 50 beat per minute) or heart block
• Suspected of Difficult Intubation
• Patients Who Are at Risk for Rapid Change of Hemodynamics
• Allergic to Dexmedetomidine
• Hepatic or Renal Impairment (Preoperative Serum Creatinine > 1.5 mg/dl)
• Pregnancy

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Triple Blind

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60 participants in 2 patient groups, including a placebo group

dexmedetomidine

Active Comparator group

Treatment:

Drug: Dexmedetomidine

control

Placebo Comparator group

Treatment:

Drug: Placebo