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Estimating EC95 of Remifentanil for Cough Prevention During Emergence From Total Intravenous Anesthesia With Propofol and Remifentanil in Patients Undergoing Transsphenoidal Hypophysectomy

This study has been completed.
Information provided by (Responsible Party):
Yonsei University Identifier:
First received: November 18, 2012
Last updated: September 17, 2013
Last verified: November 2012

In patients undergoing hypophysectomy through transsphenoidal approach, preventing cough during anesthetic emergence is important to avoid hemorrhage and cerebrospinal fluid leakage. Previous reports demonstrated that administration of remifentanil during anesthetic emergence could reduce the incidence and severity of cough during anesthetic emergence. Therefore, the objective of this study is to determine EC95 of remifentanil for preventing cough during anesthetic emergence in patients undergoing hypophysectomy with transsphenoidal approach.

Condition Intervention
Drug: Administration of remifentanil with TCI system

Study Type: Interventional
Study Design: Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Double Blind (Subject, Outcomes Assessor)
Primary Purpose: Prevention

Resource links provided by NLM:

Further study details as provided by Yonsei University:

Primary Outcome Measures:
  • The occurrence of cough during anesthetic emergence [ Time Frame: 5 min after extubation ] [ Designated as safety issue: No ]
    At a given effect-site concentration of remifentanil, if cough does not occur during anesthetic emergence, it would be considered as a success. On the other hand, if cough occurs during anesthetic emergence, it would be considered as a failure.

Enrollment: 40
Study Start Date: November 2012
Study Completion Date: July 2013
Primary Completion Date: July 2013 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: group 1
administration of remifentanil with target-controlled infusion (TCI) system at a given concentration during anesthetic emergence
Drug: Administration of remifentanil with TCI system
A given effect site concentration of remifentanil would be administered to subjects using TCI system. According to biased coin design, the given concentration of remifentanil is determined according to success or failure of just previously enrolled patient. If the former patient did not cough during anesthetic emergence at a given concentration (success), the next patient will be randomly allocated into the same concentration of remifentanil with 18/19 of probability or the lower concentration of remifentanil by 0.4 ng/ml with 1/19 of probability. If the former patient coughed during anesthetic emergence (failure), the next will be automatically allocated into the higher concentration of remifentanil by 0.4 ng/ml.


Ages Eligible for Study:   20 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • scheduled to undergo hypophysectomy with transsphenoidal approach
  • American Society of Anesthesiologists physical status I or II
  • more than 20 years old

Exclusion Criteria:

  • acute or chronic respiratory disease
  • uncontrolled hypertension
  • taking sedatives or anti-tussive
  • gastro-esophageal reflux
  • pregnant or breast feeding
  • patients who cannot understand statements for subjects or this study itself
  Contacts and Locations
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Please refer to this study by its identifier: NCT01735019

Korea, Republic of
Severance Hospital
Seoul, Korea, Republic of, 120-752
Sponsors and Collaborators
Yonsei University
  More Information

No publications provided

Responsible Party: Yonsei University Identifier: NCT01735019     History of Changes
Other Study ID Numbers: 4-2012-0350
Study First Received: November 18, 2012
Last Updated: September 17, 2013
Health Authority: South Korea: Institutional Review Board

Keywords provided by Yonsei University:
EC95, effective concentration in 95% of subjects

Additional relevant MeSH terms:
Analgesics, Opioid
Anesthetics, General
Anesthetics, Intravenous
Central Nervous System Agents
Central Nervous System Depressants
Hypnotics and Sedatives
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Sensory System Agents
Therapeutic Uses processed this record on November 23, 2014