Endoesophageal balloon catheter, system, and related method
An endoesophageal balloon and catheter for operation with a transesophageal echocardiography (TEE) probe includes an inflatable balloon body disposed over the ultrasound element of the TEE probe, a liquid inflow lumen in fluid communication with the balloon, and a liquid outflow lumen in fluid communication with the balloon. The balloon is inflated with an acoustically transmitting liquid.
1. An endoesophageal catheter for use with a transesophageal echocardiography (TEE) probe having an elongated body and, located at a distal section of the elongated body, a TEE probe head comprising a backside and a frontside in which ultrasound waves are emitted towards an anatomy to be visualized only from the frontside of the TEE probe head, the endoesophageal catheter comprising:
an elongate shaft comprising a distal region, an open distal end, and a probe channel for slidably receiving said TEE probe; and
an expandable member affixed to the distal region and enclosing the open distal end, the expandable member further comprising an open internal chamber adapted to slidably receive and enclose the TEE probe head when the TEE probe head is inserted into the expandable member such that a first wall portion of the expandable member directly covers the frontside of the TEE probe head and a second wall portion of the expandable member covers the backside of the TEE probe head, and to allow the TEE probe head to be slidable withdrawn from the expandable member, and
wherein upon expansion of the expandable member, said first wall portion of the expandable member covering the frontside of the TEE probe head expands away from the TEE probe head a greater distance than the second wall portion of the expandable member covering the backside of the TEE probe head.
2. The endoesophageal catheter of claim 1 , further comprising a reinforcing member, wherein the reinforcing member restricts expansion of the second wall portion of the expandable member.
3. The endoesophageal catheter of claim 2 , wherein the reinforcing member is an elongate stiffener.
4. The endoesophageal catheter of claim 2 , wherein the reinforcing member is a clamp affixed to the TEE probe.
5. The endoesophageal catheter of claim 1 , wherein the expandable member is a balloon.
6. The endoesophageal catheter of claim 5 , wherein the first wall portion has a first wall thickness and the second wall portion has a second wall thickness, wherein the second wall thickness is greater than the first wall thickness.
7. The endoesophageal catheter of claim 5 , wherein the balloon further comprises a sealing member for receiving the TEE probe there through, the sealing member forming a fluid tight seal with the TEE probe and the balloon thereby preventing an inflation fluid from passing there through when the TEE probe is disposed within the balloon and the balloon is inflated with the inflation fluid.
8. The endoesophageal catheter of claim 2 , wherein the second wall portion of the expandable member is held to the reinforcing member.
9. The endoesophageal catheter of claim 1 , wherein the expandable member is expanded with an ultrasonically conductive inflation fluid, and wherein the inflation fluid is temperature regulated to maintain the esophageal wall at a viable (non-lethal) temperature during an adjacent cryoablation procedure.
10. The endoesophageal catheter of claim 7 , wherein the elongate shaft further comprises a liquid inflow channel and a liquid outflow channel; and wherein the balloon is being inflatable upon delivery of the inflation fluid through the inflow channel and deflatable upon removal of the inflation fluid through outflow channel.