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  • Controllers designed to regulate the performance of perfusion pumps that deliver solutions to induce cardioplegia during cardiopulmonary bypass surgical procedures. These controllers typically consist of an electronic unit that includes a block attached to pressure transducers and a bubble sensor. The controller may also include a display showing the values of parameters (e.g., the total volume of solution delivered, ischemia time) and alarms. The controller is connected to the perfusion pump (typically a double roller pump); it may work in manual mode, allowing the operator to start and stop the pump delivery or in automated mode controlling the pump delivery up to a pre-established dose of cardioplegia solution. Cardioplegia perfusion pump controllers are mainly used as components (modules) of heart-lung bypass units during open heart surgery procedures.
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