The endoaortic clamp for antegrade cardioplegia delivery is usually inflated to which pressure?

The endoaortic clamp used for antegrade cardioplegia delivery is typically inflated to a pressure range of 250-350 mmHg. This higher inflation pressure is necessary to achieve adequate occlusion of the aorta, ensuring that the cardioplegia solution can be effectively delivered into the coronary arteries. By maintaining this pressure, the clamp prevents backflow and facilitates the distribution of the cardioplegia to the myocardium, minimizing ischemic damage during cardiac surgery.

Additionally, this pressure range is crucial for ensuring the efficacy of the cardioplegia solution, which can protect the heart muscle during periods of arrest and reperfusion. Lower inflation pressures may not create a sufficient seal or could risk incomplete delivery of the cardioplegia, compromising myocardial protection during surgery. Thus, the pressure range of 250-350 mmHg is essential for optimal performance of the endoaortic clamp in this context.