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Ann Thorac Surg 1977;24:574-581
© 1977 The Society of Thoracic Surgeons

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Articles

A Pulsatile Assist Device (PAD) for Use During Cardiopulmonary Bypass

Chest Surgical Service, Department of Surgery, Columbia University College of Physicians and Surgeons, and the Surgical Service, Presbyterian Hospital, New York, NY.

^* Address reprint requests to Dr. Bregman, Department of Surgery, Columbia University College of Physicians and Surgeons, 630 W 168 St, New York, NY 10032

A pulsatile assist device (PAD) has been developed to convert roller pump flow to pulsatile flow in a simple fashion. The device can also be used as an arterial counterpulsator before and after cardiopulmonary bypass. The PAD has been used in 125 adult patients undergoing open-heart operations for coronary artery or valvular heart disease or the combination. Ninety-two patients were in New York Heart Association Functional Class III or IV or had ejection fractions of less than 0.3. The PAD functioned as a hemodynamically effective arterial counterpulsator before and after perfusion. All patients were successfully weaned from bypass with the PAD. There has been 1 intraoperative death and 2 late deaths. Only 1 patient had a perioperative myocardial infarction, and this person was successfully treated with intraaortic balloon pumping.

We believe the PAD is a simple and reliable device for intraoperative counterpulsation and for the creation of pulsatile cardiopulmonary bypass. More important, use of the PAD may decrease both the incidence of perioperative myocardial infarction and the need for postoperative intraaortic balloon pumping.

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