separation from bypass
The critical phase of cardiac surgery when the patient's circulation is transitioned from cardiopulmonary bypass back to native heart function.
Full Definition
Separation from bypass, also called weaning from cardiopulmonary bypass, represents one of the most critical phases of cardiac surgery where the surgical team gradually transfers circulatory support from the heart-lung machine back to the patient's own heart. This process requires careful assessment of cardiac function, adequate de-airing of cardiac chambers, optimization of preload and afterload, and often the administration of inotropic medications to support cardiac contractility. The separation process is typically guided by transesophageal echocardiography to evaluate ventricular function and detect any residual air or structural abnormalities. Successful separation indicates that the surgical repair is functionally adequate and the heart can sustain systemic circulation independently.
Usage
Usage note: Use 'from' rather than 'off' in formal documentation; describe the ease or difficulty of the process.
In Context
- "Separation from bypass was achieved easily without the need for inotropic support." — operative report
- "The first attempt at separation from bypass was unsuccessful due to poor right heart function." — anesthesia record