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Ann Thorac Surg 1981;32:401-405
© 1981 The Society of Thoracic Surgeons
From the Cardiac Surgical Research Unit of the Baker Institute and the C. J. Officer Brown Cardiac Surgical Unit of the Alfred Hospital, Melbourne, Australia
Accepted for publication February 5, 1981.
* Address reprint requests to Dr. Rosenfeldt, Baker Medical Research Institute, Commercial Rd, Prahran, 3181, Victoria, Australia
A simple system is described that recirculates cooling fluid for topical cardiac hypothermia. This disposable system can produce a flow of 1,500 ml/min at 2,° to 4°C. The recirculating cooler produced significantly lower myocardial temperatures than a conventional fluid-discard system in 22 patients having coronary operation. This system has been used as part of the technique of hypothermic cardioplegia in more than 600 patients. During various cardiac procedures, septal temperatures were maintained well below 20°C for 60 minutes or more without the need to reinfuse the cardioplegic solution.
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