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Optimal continuous retrograde coronary perfusion flow rate with beating heart in normal temperature
Toshihide Tsukioka1, Sigeyuki Tomita, Go Watanabe
1Department of General and Cardiothoracic Surgery, Kanazawa University School of Medicine, Kanazawa, Japan. tsukky@d8.dion.ne.jp
Artificial Organs
|March 30, 2004
Summary
This study demonstrates that retrograde oxygenated blood perfusion enables beating heart surgery. Researchers successfully maintained a beating heart for 120 minutes, paving the way for clinical applications in open heart procedures.
Area of Science:
- Cardiovascular Surgery
- Cardiopulmonary Bypass
- Medical Device Technology
Background:
- Traditional open heart surgery requires cardiac arrest.
- Maintaining heart function during surgery is a significant challenge.
- Retrograde perfusion offers a potential alternative for cardiac procedures.
Purpose of the Study:
- To investigate the feasibility of performing surgery on a beating heart using retrograde oxygenated blood perfusion.
- To determine the optimal flow rate for sustained retrograde perfusion.
- To assess the safety and efficacy of this technique for extended durations.
Main Methods:
- Two-stage experiment involving six pigs in each stage.
- Procedure 1: Determining optimal retrograde perfusion flow rate (5.0-10.0 mL/kg/min).
- Procedure 2: Sustaining retrograde perfusion for 120 minutes at the optimal flow rate.
Main Results:
- The optimal retrograde perfusion flow rate was identified as 7.0 mL/kg/min.
- Retrograde perfusion was successfully maintained for 120 minutes at this optimal rate.
- The beating heart remained in normal sinus rhythm throughout the perfusion period.
Conclusions:
- Retrograde oxygenated blood perfusion allows for the maintenance of a beating heart during extended surgical procedures.
- This technique shows promise for clinical application in open heart surgery.
- The study supports the potential for less invasive cardiac surgical interventions.