An interventional study of non-thermosoftening and thermosoftening in Intubation Complication, Hoarseness and Sore Throat, sponsored by Seoul National University Hospital. Completed at 1 site in South Korea. Open to participants aged 20 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-06-25.
Sponsored by Seoul National University Hospital · Not applicable, Interventional, and Prevention
The purpose of this study is to investigate the effect of double-lumen tube thermal-softening before intubation on the success rate of tube exchange by airway exchange catheter.
52 studies on the registry are indexed under Hoarseness; 9 are open to participants now.
This study's enrollment of 102 is close to the median of 108 across 44 interventional studies indexed under Hoarseness.
Browse Hoarseness studies →Seoul National University Hospital is the lead sponsor of 1,900 studies on the registry; 274 are open to participants now.
Of its 12 completed or terminated interventional studies of FDA-regulated products, 2 (17%) have results posted.
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Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Double-lumen tube is put into a bottle of normal saline at room temperature (25°C) before intubation.
Procedure: non-thermosoftening
Double-lumen tube is put into a bottle of warm normal saline (40°C) before intubation.
Procedure: thermosoftening
By using airway exchange catheter, tube exchange is performed from single to double lumen tube that was put into normal saline at room temperature.
By using airway exchange catheter, tube exchange is performed from single to double lumen tube that was put into warm normal saline (40°C).
Time to intubate
Length of time to exchange endotracheal tube from single- to double-lumen tube using airway exchange catheter.
Time frame: Intraoperative (During exchanging single- to double-lumen tube)
Postoperative hoarseness (4-points scoring)
Time frame: up to 48 hours after surgery
postoperative sore throat (4-points scoring)
Time frame: up to 48 hours after surgery
Vocal cord injuries assessed by videolaryngoscope
vocal cord injuries observed after tube-exchange
Time frame: up to 1 hour after double-lumen tube extubation
Ran from Dec 2017 to primary completion in Mar 2019, 15 months.
Of 21 interventional studies with no phase under Hoarseness, half reached primary completion within 15 months of starting (the median), counting those still running; a quarter within 9 and three quarters within 24. This study's 15 months is close to that.
How these figures are worked out, and which studies are left out of them.
This study is completed, as verified in Jun 2025. You cannot join it, but the record below documents what was studied.
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