Importance

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Abstract

A method for expelling blood and preventing blood from entering portions of an atherectomy system that includes the passage of infusion fluid through a passageway configured in the atherectomy system so as to provide a flow of infusion fluid through an operational mechanism of the atherectomy system and exit the atherectomy system at a higher pressure and higher velocity than that of the blood flow within the blood vessel in which the atherectomy system is operating. The method includes lubricating portions of the atherectomy system by bringing infusion fluid into contact with components of the operational mechanism of the atherectomy system, wherein a relative position of the two components one to another varies during operation. The atherectomy system includes a control system that monitors and regulates the amount of fluid infused into, and the fluid leaving, the artery by a weight comparison method in which the relative weight difference between the infusion bag and the effluent collecting bottle is compared.

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First Claim