Patent ID: 11957852
Assignee: BIOSENSE WEBSTER (ISRAEL) LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. A catheter comprising:
an elongated shaft extending along a longitudinal axis of the catheter;
an inflatable balloon disposed approximate a distal end of the elongated shaft and comprising an interior configured to receive an inflation medium to inflate the inflatable balloon to a first expanded volume defined by a truncated cone having its base connected to a semi-toroid;
a central tube extending along the longitudinal axis,
at least a portion of the central tube being positioned within the inflatable balloon, providing structural support for the inflatable balloon, comprising inflation ports, and comprising a central lumen in fluidic communication with the inflation ports,
the central lumen and inflation ports providing a flow path between the inflatable balloon interior and the elongated shaft to allow the inflation medium to pass from the elongated shaft into the interior of the inflatable balloon,
the central tube being configured to move distally along the longitudinal axis to change the first expanded volume to a second expanded volume defined substantially by two truncated cones connected at their respective bases;

an elastic element, coupled to the central tube and shaft and configured to self-elongate thereby sliding the central tube in relation to the shaft and extending the inflatable balloon in length in relation to the longitudinal axis;
a puller-wire connected to the central tube, extending through the shaft, and configured to be accessible for retraction during treatment so that retraction of the puller-wire compresses the elastic element along the longitudinal axis thereby sliding the central tube in relation to the shaft and contracting the inflatable balloon in length in relation to the longitudinal axis; and
a distal plug positioned to prevent loss of fluid through a distal end of the central tube.