de-airing
The process of removing air from cardiac chambers and vessels during cardiac surgery to prevent air embolism.
Full Definition
De-airing is a critical safety procedure performed during cardiac surgery to eliminate air bubbles from the heart chambers, coronary arteries, and great vessels before restoring normal circulation. Air can enter the circulation when cardiac chambers are opened during surgery, and if not properly removed, can cause devastating complications including stroke, myocardial infarction, or other organ dysfunction. De-airing techniques include positioning the patient in Trendelenburg position, manually manipulating the heart to mobilize trapped air, using carbon dioxide flooding to displace air (as CO2 is more soluble in blood), and utilizing transesophageal echocardiography to visualize and confirm complete air removal. Thorough de-airing is essential before separation from cardiopulmonary bypass.
Usage
Usage note: Hyphenate when used as a gerund or noun; describe the method and confirmation technique used.
In Context
- "Extensive de-airing was performed with TEE confirmation before coming off bypass." — operative report
- "Carbon dioxide insufflation was used to facilitate de-airing of the left ventricle." — surgical technique note