Clinical trial NCT02808897: Active Clearance of Chest Tubes After Cardiac Surgery: A Prospective Randomized Controlled Study
Official title: Active Clearance of Chest Tubes After Cardiac Surgery: A Prospective Randomized Controlled Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Atrial Fibrillation
Pericardial Effusion
Pleural Effusion
Hemothorax
Cardiac Tamponade
Keywords: Chest tubes
Atrial fibrillation
Thoracic surgery
Critical care
Lead sponsor: Montreal Heart Institute
Sponsor class: OTHER
Collaborators: name: ClearFlow, Inc.
name: Hopital du Sacre-Coeur de Montreal
First posted: 2016-06-22
Enrollment: 520
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: PREVENTION

Brief summary: The purpose of this study is to assess the effectiveness of the PleuraFlow® Active Tube Clearance (ATC) technology in reducing the rate of postoperative atrial fibrillation (POAF) among post cardiac surgery patients and to evaluate the impact of Active Tube Clearance (ATC) on other complications, such as retained blood syndrome (RBS), a composite endpoint including re-exploration for bleeding or tamponade, and interventions for hemothorax, pericardial or pleural effusion.

Detailed description: Data will be collected and stored at the department of surgery of Montreal Heart Institute. Only the principal investigator and study coordinators will have access to the database.

The primary analysis will be an intention-to-treat (ITT) analysis comparing the POAF rate in the PleuraFlow® group to the POAF rate in the control group. Based on findings from our institutional clinical database at the Montreal Heart Institute, the local incidence of POAF after cardiac surgery is approximately 25% (control group). The proportion in ATC group (the treatment group) is assumed to be 0,2500 under the null hypothesis and 0,1500 under the alternative hypothesis. Group sample sizes of 254 in each group achieve 80% power to detect a difference between the group proportions of 0,1000 using a Chi-Square test with a significance level of 0.0476. This significance level is computed using the O'Brien-Fleming method and accounts for the interim analysis that is planned after 300 randomized subjects have completed their 30-day follow-up.

POAF and intervention to treat RBS rates and all other categorical event rates will be compared using chi-square tests. Multiple logistic regressions to adjust for potential confounding factors will also be used. Odds ratio and associated 95% confidence intervals will be computed for descriptive purpose. Goodness of fit will be checked using Hosmer-Lemeshow statistics. Quantitative endpoints will be investigated using Student t-tests. Analysis of covariance may also be used to account for potential confounding factors. Nonparametric tests or data transformation may be used if quantitative endpoints are not normally distributed. Correlations and associated 95% confidence intervals will be computed for descriptive purpose. An interim analysis will be conducted on the first 300 randomized subjects completing their 30-day follow-up. The primary endpoint (POAF rate) will be compared between the PleuraFlow® group and the control group using a chi-square test. The significance level for this test will be 0.0076, as computed using the O'Brien-Fleming method. If the p-value of the chi-square test is below this bound at the interim analysis, the study will be stopped for efficacy. Otherwise, the study will continue up to the planned 508 patients. As a result of this interim look, the final analysis of the primary endpoint would require a p \< 0.0476 to be declared statistically significant. Analysis of the secondary endpoints and other outcomes will be conducted at the 0.05 significance level.

Eligibility criteria: Inclusion Criteria:

1. Admission for coronary artery bypass graft (CABG), valve replacement or valve repair surgery, or a combination of these surgeries;
2. Surgical procedure(s) on the ascending aorta and/or aortic arch that do not require deep hypothermic arrest (deep hypothermic arrest is defined as \< 18° C);
3. Must be in sinus rhythm (SR) for a minimum of 30 days prior to the index surgery and at the start of the index surgery. No patient with history of atrial fibrillation.
4. Sign the institutional review board/institutional ethics committee approved informed consent form after the nature of the study has been explained and questions/concern have been addressed.

Exclusion Criteria:

1. Admitted for surgical treatment of arrhythmia or Atrial fibrillation history;
2. Admitted for cardiac surgery requiring implantation/explantation of a Ventricular Assist Device (VAD) or heart transplant;
3. Admitted for Transcatheter aortic valve replacement (TAVR);
4. Cardiac surgical procedure that requires deep hypothermic arrest (as defined above);
5. New or active endocarditis or myocarditis that is not adequately controlled with medication and/or requires surgical intervention;
6. Documented inherited bleeding disorder(s);or
7. History or known allergies to the device materials.
8. Intervention carried out by a non-participating surgeon

Primary outcomes:
measure: Number of Participants With Postoperative Atrial Fibrillation
timeFrame: From post index surgery through hospital discharge, an average of 30 days
Secondary outcomes:
measure: Number of Participants Requiring Invasive Procedure for Intrathoracic Fluid Removal (Retained Blood Complications)
timeFrame: Within 30 days post index surgery
measure: Number of Participants Requiring Re-exploration for Bleeding or Tamponade
timeFrame: within 30-day post index surgery
measure: Number of Participants Presenting With a Chest Tube Occlusion
timeFrame: At chest tube removal
measure: Number of Patients Requiring Pericardial Drainage Procedure
timeFrame: within 30-day post index surgery
measure: Number of Patients Requiring Pleural Drainage Procedure
timeFrame: within 30-day post index surgery
Other outcomes:
measure: Number of Patients Being Readmitted
timeFrame: Within 30 days post index surgery
measure: Total Chest Tube Output
timeFrame: At chest tube removal
Locations:
city: Montreal
country: Canada
facility: Montreal Heart Institute
state: Quebec
city: Montreal
country: Canada
facility: Hôpital du Sacré-Coeur de Montréal
state: Quebec
Study officials:
affiliation: Montreal Heart Institute
name: Philippe Demers, MD MSc
role: PRINCIPAL_INVESTIGATOR
References:
citation: St-Onge S, Chauvette V, Hamad R, Bouchard D, Jeanmart H, Lamarche Y, Perrault LP, Demers P. Active clearance vs conventional management of chest tubes after cardiac surgery: a randomized controlled study. J Cardiothorac Surg. 2021 Mar 23;16(1):44. doi: 10.1186/s13019-021-01414-0.