Flow rate verification monitor for fluid-cooled microwave ablation probe

摘要

A microwave ablation system includes an antenna assembly configured to deliver microwave energy from an energy source to tissue and a coolant source operably coupled to the energy source and configured to selectively provide fluid to the antenna assembly via a fluid path. The system also includes a controller operably coupled to the energy source and a piezoelectric transducer operably coupled to the fluid path to detect a force of fluid flow through the fluid path. The piezoelectric transducer is configured to generate a signal based on the detected force of fluid through the fluid path. The controller is configured to control the energy source output based on the generated signal.

主权项

1. A microwave ablation system, comprising:
an antenna assembly including a feedline configured to deliver microwave energy from an energy source to tissue, the antenna assembly having a handle enclosure housing an inflow chamber and an outflow chamber disposed distal to and in fluid communication with the inflow chamber, the handle enclosure defining an abutment portion on a proximal portion thereof, wherein the feedline extends through the inflow and outflow chambers; a sheath enclosing at least a portion of the feedline to form a fluid chamber therebetween; a return lumen disposed along at least a portion of the feedline to provide fluid communication between the fluid chamber and the outflow chamber; a coolant source operably coupled to the energy source and configured to selectively provide fluid to the antenna assembly via the inflow chamber; a controller operably coupled to the energy source; and a piezoelectric transducer disposed within the handle enclosure between the inflow chamber and the abutment portion and configured to detect a force of fluid flow through the inflow chamber and generate a signal based on the detected force of fluid flow through the inflow chamber, wherein the controller is configured to control the energy source based on the generated signal.