Catheter system having controllable ultrasound locating means
First Claim
1. A catheter system comprising:
- a locator catheter comprising a catheter shaft having a distal tip section, a distal end, a proximal end and at least one lumen extending therebetween, wherein at least one electrode is secured at said distal tip section;
a handle attached to the proximal end of said catheter shaft;
an ultrasound crystal secured on the catheter shaft proximal to the distal end for transmitting ultrasound signals;
a connector secured to the proximal end of said handle;
a reference catheter comprising at least three ultrasound crystal beacons for receiving the ultrasound signals transmitted from the ultrasound crystal secured to the locator catheter, wherein at least one beacon is movable on said reference catheter and controllable by a beacon deployment mechanism at the handle, said beacons having coordinates that are pre-set with reference to an external location calibration system, wherein said beacons can emit and receive ultrasound signals;
said external location calibration system for receiving signals from the crystal beacons and constantly calibrating the coordinates of the beacons on the reference catheter; and
a data acquisition computer connected to the location calibration system for determining the location of the locator catheter.
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Accused Products
Abstract
An improved catheter system having ultrasound locating capabilities comprising a locator catheter and an ultrasound receiver catheter resulting in an effective electrophysiology procedure without undesired side effects of using a conventional x-ray imaging system. Said catheter system comprising a locator catheter consisted of at least one electrode and an ultrasound crystal secured on the locator catheter; and a reference catheter comprising three or more ultrasound crystal beacons which have pre-determined locations with reference to an external locating calibration system, wherein said external locating calibration system constantly calibrates the coordinates of the beacons on the reference catheter, having at least one ultrasound beacon is movable/controllable by a beacon deployment means.
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Citations
16 Claims
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1. A catheter system comprising:
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a locator catheter comprising a catheter shaft having a distal tip section, a distal end, a proximal end and at least one lumen extending therebetween, wherein at least one electrode is secured at said distal tip section;
a handle attached to the proximal end of said catheter shaft;
an ultrasound crystal secured on the catheter shaft proximal to the distal end for transmitting ultrasound signals;
a connector secured to the proximal end of said handle;
a reference catheter comprising at least three ultrasound crystal beacons for receiving the ultrasound signals transmitted from the ultrasound crystal secured to the locator catheter, wherein at least one beacon is movable on said reference catheter and controllable by a beacon deployment mechanism at the handle, said beacons having coordinates that are pre-set with reference to an external location calibration system, wherein said beacons can emit and receive ultrasound signals;
said external location calibration system for receiving signals from the crystal beacons and constantly calibrating the coordinates of the beacons on the reference catheter; and
a data acquisition computer connected to the location calibration system for determining the location of the locator catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for operating a catheter system to contact a target tissue in a heart chamber for an electrophysiology study, the catheter system comprising a locator catheter comprising a catheter shaft having a distal tip section, a distal end, a proximal end and at least one lumen extending therebetween, wherein at least one electrode is secured at said distal tip section;
- a handle attached to the proximal end of said catheter shaft;
an ultrasound crystal secured on the catheter shaft proximal to the distal end;
a connector secured to the proximal end of said handle; and
a reference catheter comprising at least three ultrasound crystal beacons which have pre-determined locations with reference to an external locating calibration system, wherein at least one beacon is movable on said reference catheter and controllable by a beacon deployment mechanism at the handle and said ultrasound beacons can emit and receive ultrasound signals;the method comprising the steps of;
percutaneously introducing the reference catheter under non-deployed state through a blood vessel to the heart chamber;
deploying the catheter to position the at least three ultrasound crystal beacons;
locating the at least three ultrasound crystal beacons in reference to an external calibration system;
constantly calibrating the location of the crystal beacons on the reference catheter;
percutaneously introducing the locator catheter through a blood vessel to the heart chamber;
deflecting the distal section of said locator catheter about a transverse axis to position the tip section;
determining the coordinates of the locator catheter; and
intimately contacting the electrode with the target tissue for an electrophysiology study.- View Dependent Claims (11, 12, 13, 14, 15, 16)
- a handle attached to the proximal end of said catheter shaft;
Specification