A Randomized Multicenter Clinical Study On the High Vacuum Body Cavity Drainage System Following Open Heart Surgery (NO-NUMO)
|Coronary Artery Disease Heart Valve Disease||Device: NO-NUMO™ High Vacuum Body Cavity Drainage System Device: PVC Chest Tube||Phase 2|
|Study Design:||Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Supportive Care
|Official Title:||A Prospective, Randomized, Multicenter Clinical Study on the High Vacuum Body Cavity Drainage Systems Following Open Heart Surgery|
- Amount of Postoperative Bleeding [ Time Frame: 24-48 hours post surgery ]The outcome is to measure the amount of postoperative bleeding in cardiac surgery patients from the time the chest is completely closed until the chest tube is pulled out.
- Duration of Mediastinal Drainage [ Time Frame: Immediate postoperative when the chest is completely closed to the time chest tubes are pulled out of the patient ]The outcome to measure is the duration of the chest tubes inserted in the patient in hours. The time starts at the time the chest is completely closed and the end time when the chest tubes are pulled out of the patient's chest.
|Study Start Date:||September 2006|
|Study Completion Date:||September 2010|
|Primary Completion Date:||July 2010 (Final data collection date for primary outcome measure)|
Experimental: NO-NUMO Chest Tube
The NO-NUMO™ High Vacuum Body Cavity Drainage System consist of disposable NO-NUMO™ body cavity drainage tubes, disposable Vario™ fluid management canisters Vario™ portable vacuum pump
Device: NO-NUMO™ High Vacuum Body Cavity Drainage System
(1) disposable NO-NUMO™ body cavity drainage tubes, (2) disposable Vario™ fluid management canisters and (3) Vario™ portable vacuum pump
Active Comparator: Standard Chest Tube
Classic PVC Chest Tube
Device: PVC Chest Tube
Standard PVC Chest Tube Sizes 14-36 French
High vacuum chest drainage was once considered inadvisable because of a possible suction injury to soft tissues, such as the lungs or mediastinum. Wakabayashi showed that excessive suction force generated by a high vacuum pressure was related to the surface area of the suction applied to the tissues and not the vacuum pressure itself1&2. He postulated that suction injury to the lung would not occur if the suction force of a chest tube is below the capillary blood pressure of 30 - 35 torr2. Based on this theory, Wakabayashi developed a double-lumen chest drainage tube3 (Trade name NO-NUMO™) and its clinical use was approved by FDA4 in 2002. A prototype 7-5Fr double-lumen chest tube was successfully tested in laboratory animals and three patients1&2 and the safety of high vacuum chest drainage was proven in a large number of patients undergoing uncomplicated thoracoscopic surgeries2. The unique design of the new drainage tube is the small diameter double lumen tube with hundreds of tiny holes that allows rapid drainage without damaging effects of high suction over a limited surface area. High vacuum suction is available on wall units already in place in the OR and ICU beds. To adopt this system for clinical use, a high vacuum gauge was needed (most don't go beyond 200 torr) to monitor suction, and a high pressure battery powered vacuum pump for transport was necessary, so that drainage was maintained and blood clotting in the tube avoided during the period of prolonged transport from the OR and the setup in the ICU. Several brands of portable vacuum pumps on the market were evaluated before concluding that the Vario™ pump (Medela® Inc.) was superior. The maximal vacuum pressure that Vario pump can generate is 630 torr or 84 kPa which is equivalent to -857 cmH2O.
The NO-NUMO™ High Vacuum Body Cavity Drainage System consist of; (1) disposable NO-NUMO™ body cavity drainage tubes, (2) disposable Vario™ fluid management canisters and (3) Vario™ portable vacuum pump. We evaluated this new system, using a 13Fr triple-tube set for the mediastinal drainage, a 13Fr single-tube for the left pleural drainage and two 13Fr NO-NUMO tubes for the drainage of the lower extremity subcutaneous wounds following the harvesting of the saphenous veins. The tubing was connected to a disposable liner of a Medi-Vac™ (Cardinal Health, Inc.) suction canisters, which was connected to a Vario pump at 300 torr (= 40 kPa) in patients following open heart surgeries.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00581399
|United States, California|
|University of California, Irvine Medical Center|
|Orange, California, United States, 92868|
|Principal Investigator:||Jeffrey C Milliken, MD||University of California, Irvine|