Disconnection Technique With a Bronchial Blocker for Improving Lung Deflation

Not Applicable

Completed

• Conditions: Pneumothorax

• Registration Number: NCT01846936
• Lead Sponsor: Ajou University School of Medicine

Brief Summary

One lung ventilation (OLV) is accomplished with a double lumen tube (DLT) or a bronchial blocker (BB). In this study, the investigators compared the effectiveness of lung collapse using DLT, BB with spontaneous collapse, and BB with disconnection technique.

Detailed Description

In selecting this maneuver of OLV, lung collapse is a major concern because it permits adequate surgical exposure. Although once lung deflation was achieved, the overall clinical performance appears to be similar, BB takes longer to deflate the operative lung and there is some conflict reports as to BB provides a similar degree of lung deflation compared to that of DLT.

The aim of this study was to compare the efficacy of BB and DLT for achieving lung collapse, and to evaluate the efficacy of disconnection technique with monitoring the carbon dioxide trace on a capnograph in BB. The investigators further evaluated the disconnection time, which is the time to loss of carbon dioxide trace on the capnograph, needed to facilitate lung collapse.

Study Timeline

• Study Start: 2012-08
• Study First Submitted: 2012-10-24
• Primary Completion: 2012-12
• Study Completion: 2012-12
• Study First Submitted QC: 2013-05-03
• Study First Posted: 2013-05-06
• Status Verified: 2015-06
• Last Update Submitted: 2015-06-22
• Last Update Posted: 2015-06-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 54

Inclusion Criteria

• Patients undergoing thoracic surgery for which OLV is required

Exclusion Criteria

• Patients with an anticipated difficult intubation with infectious or bleeding lung lesions are excluded.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Effectiveness of three lung isolation methods	Ten min from the start of one lung ventilation	The degree of lung collapse after 5 min from the start of OLV. The degree of lung collapse was assessed using a lung collapse score (0 = no collapse, to 10 = complete collapse) by one thoracic surgeon. The surgeon who assessed the lung collapse was absent from the operating room during DLT or BB placement and was blinded to the airway device.

Secondary Outcome Measures

Name	Time	Method
The disconnection time	The time to loss the carbon dioxide trace on the capnograph (30 seconds)	Before initiating OLV in group 3, we turned-off the ventilator and fully opened the adjustable pressure limiting valve allowing both lungs to collapse. And then, the time which capnograph lose the carbon dioxide curve is considered the disconnection time required for both lungs to collapse before initiating one lung ventilation.

Trial Locations

Locations (1)

Ajou University Hospital; 🇰🇷 Suwon, Gyung Gi, Korea, Republic of