- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01444703
Comparison of Licorice Versus Sugar-water Gargle for Prevention of Postoperative Sore Throat and Postextubation Coughing
Randomized, Double-blind Comparison of Licorice Versus Sugar-water Gargle for Prevention of Postoperative Sore Throat and Postextubation Coughing
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Patients will be premedicated with up to 7.5 mg p.o. midazolam, per routine. They will be told that the study involves two different solutions for prevention of post-extubation sore throat.
Patients will be randomly assigned to gargle 5 minutes before induction of general anesthesia with: 1) licorice (0.5 g); or, 2) sugar (5 g). Randomization will be based on a computer-generated table of random numbers. Licorice or sugar (placebo) will be diluted in 30 ml water and filled in a small bottle by an independent apothecary of our university. All bottles will look similar and will not be opened until just before use. Investigator and patient will be blinded to the preparation used for gargle. Patients will be asked to gargle for two minutes, but not to swallow the solution.
General anesthesia will be induced with fentanyl ≈3 µg/kg, propofol ≈1.5 mg/kg, and rocuronium ≈0.6 mg/kg. Complete muscle relaxation will be confirmed by absence of palpable twitches in response to supra-maximal train-of-four stimulation of the ulnar nerve at the wrist. The trachea will then be intubated as gentle as possible. Intubation will be attempted with a Macintosh laryngoscope, but the anesthesiologists may subsequently use any other intubation equipment as necessary. Initial tube size will be 37 cm left in women and 39 cm left for men; however, other sizes can be used if clinically necessary. Endotracheal tube cuffs will be inflated with air to 20-25 mmHg as necessary to maintain an adequate seal.
General anesthesia will be primarily be maintained with sevoflurane. Patients lungs will be ventilated with O2 in air, usually with an inspired oxygen fraction (FiO2) of ≈40%. However, additional oxygen will be provided as clinically necessary, especially during one-lung ventilation. End-tidal CO2 will be maintained between 32 and 35 mmHg as clinically practical. Deep of anesthesia will be monitored by using bispectral index BIS, kept between 40 and 50. Small amounts of opioid will be permitted during surgery and in preparation for extubation. At the end of surgery, an intercostal plexus block -using up to 20 ml Ropivacaine 0.1% - will be performed by the surgeons. 1000 mg paracetamol will be given intravenously ten minutes before end of surgery. Post operative pain will be treated with fractional piritramid (Dipidolor) 3 mg IV as required.
Study Type
Enrollment (Actual)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
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Vienna, Austria
- Universitätsklinik für Anästhesie, Intensivmedizin und Schmerztherapie an der medizinischen Universität Wien
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Thoracic surgery with anticipated use of a double-lumen endotracheal tube;
- Anticipated extubation in the operating room;
- ASA Physical Status 1-3;
- Age 18- 90
Exclusion Criteria:
- Tracheal pathology, including tracheostomy;
- Surgery within the previous four weeks;
- Upper-respiratory tract infection;
- BMI higher exceeding 40 kg/m2;
- Known or suspected allergy to licorice;
- Use of non-steroidal anti-inflammatory drug medication within 24 hours;
- Chronic opioid use;
- Preoperative pain ≥ 2 on an 11-point Likert scale (0 = no pain; 10 = worst pain);
- Known or suspected difficult airway.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Supportive Care
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: sugar solution
Gargle 5 minutes before induction of general anesthesia with sugar solution.
|
sugar (5 g).
|
Active Comparator: licorice
Gargle 5 minutes before induction of general anesthesia with licorice solution.
|
licorice (0.5 g)
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
sore throat in rest after intubation
Time Frame: up to 4 hours post-extubation
|
We propose to test the hypothesis that pre-operative gargling with licorice reduces the incidence of sore throat in rest after intubation with double-lumen endotracheal tubes compared to placebo after surgery through the first four post-extubation hours.
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up to 4 hours post-extubation
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
post-extubation coughing
Time Frame: up to four hours post-extubation
|
Pre-operative gargling with licorice reduces sore throat pain during the initial postoperative day.
Pre-operative gargling with licorice reduces the incidence of post-extubation coughing.
|
up to four hours post-extubation
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amount of coughing
Time Frame: 24 hours post operative
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Pre-operative gargling with licorice reduces the amount of coughing during the remainder of the first postoperative day.
|
24 hours post operative
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sore throat in rest
Time Frame: first 24 hours after surgrey
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Pre-operative gargling with licorice reduces the incidence of sore throat in rest and during swallowing within the first 24 hours
|
first 24 hours after surgrey
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incidence of sore throat during swallowing
Time Frame: first 24 hours after surgery
|
Pre-operative gargling with licorice reduces the incidence of sore throat in rest and during swallowing within the first 24 hours
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first 24 hours after surgery
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Collaborators and Investigators
Sponsor
Investigators
- Study Chair: Daniel Sessler, MD, Outcomes Research Consortium, Cleveland Clinic
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- 332/2010
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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