Laser fiber displacement system and methods
Systems and methods used to ablate tissues using laser energy are disclosed. The systems and methods may be configured to remotely displace a laser fiber to ablate more than one zone of tissue. The systems can include a displacement device comprising a linear displacement member configured to longitudinally displace the laser fiber. The systems can also include a sleeve configured to maintain a cooling catheter in a longitudinal stationary position when the laser fiber is displaced.
1 . A laser fiber displacement system, comprising:
a displacement device, comprising:
a housing;
a linear slide coupled to the housing;
a carriage slidingly coupled to the linear slide, wherein the carriage is configured to longitudinally move relative to the housing along the linear slide between a proximal position of the carriage and a distal position of the carriage; and
a clamp coupled to the carriage, the clamp comprising a slot extending into a side of the clamp, wherein the slot extends along a longitudinal length of the carriage, wherein the slot is configured to selectively receive a laser fiber, and wherein the clamp is configured to apply a clamping force that secures the laser fiber to the carriage; and
a sleeve comprising a lumen configured to receive the laser fiber within the lumen of the sleeve, the sleeve configured to selectively couple a cooling catheter to the displacement device,
wherein the displacement device is configured to longitudinally displace the laser fiber relative to the cooling catheter through the lumen as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage, and wherein the sleeve is configured to resist longitudinal compression such that the cooling catheter remains stationary relative to the housing as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage.
2 . The system of claim 1 , wherein the displacement device comprises:
a motor coupled to the carriage, wherein the motor is configured to longitudinally move the carriage between the proximal position of the carriage and the distal position of the carriage; and
a power source electrically interconnected to the motor, wherein the power source is configured to provide electrical power to the motor.
3 . The system of claim 2 , wherein the displacement device further comprises a motor controller and a communication member, wherein the communication member is an optical to serial converter.
4 . The system of claim 2 , wherein the motor is any one of a piezo linear motor, a piezo rotation motor, a piezo motor, or a stepper motor.
5 . The system of claim 2 , wherein the power source comprises any one of a disposable battery or a rechargeable battery.
6 . The system of claim 5 , wherein the power source comprises a lithium polymer battery.
7 . The system of claim 1 , wherein the sleeve comprises:
a hollow elongate body comprising the lumen;
a first connector disposed at a proximal end of the hollow elongate body, wherein the sleeve is coupled to the displacement device at the first connector; and
a second connector disposed at a distal end of the hollow elongate body, wherein the cooling catheter is arranged distally of the second connector; and
wherein the hollow elongate body is configured to resist longitudinal compression.
8 . The system of claim 7 , wherein the hollow elongate body comprises any one of nylon, polyethylene, or polypropylene.
9 . The system of claim 1 , further comprising a communication cable, wherein the communication cable comprises an optical fiber.
10 . The system of claim 1 , wherein the laser fiber displacement system is configured to be used in a magnetic resonance environment.
11 . The system of claim 1 , further comprising:
a sealing member selectively coupled to the sleeve; and
a tubing set selectively coupled to the sealing member.
12 . The system of claim 11 , wherein the sealing member is configured to selectively fluidly seal around the laser fiber and to allow displacement of the laser fiber relative to the seal member.
13 . The system of claim 11 , wherein the tubing set comprises:
a manifold comprising an inflow port and an outflow port;
an extension tube coupled to each of the inflow port and the outflow port;
an elongate inflow tubing coupled to the extension tube of the inflow port; and
an elongate outflow tubing coupled to the extension tube of the outflow port.
14 . The system of claim 1 , wherein the laser fiber is prevented from rotating as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage.
15 . A method of ablating a tissue, comprising:
inserting a laser fiber and a cooling catheter into a target ablation region;
transmitting laser energy through the laser fiber to ablate a first tissue zone in the target ablation region;
displacing, via a displacement device of a laser fiber displacement system, the laser fiber from the first tissue zone to a second tissue zone in the target ablation region, wherein the displacement device comprises:
a housing;
a linear slide coupled to the housing;
a carriage slidingly coupled to the linear slide, wherein the carriage is configured to longitudinally move relative to the housing along the linear slide between a proximal position of the carriage and a distal position of the carriage; and
a clamp coupled to the carriage, the clamp comprising a slot extending into a side of the clamp, wherein the slot extends along a longitudinal length of the carriage, wherein the slot is configured to selectively receive the laser fiber, wherein the clamp is configured to apply a clamping force that secures the laser fiber to the carriage,
wherein displacing the laser fiber comprises longitudinally displacing the laser fiber through a sleeve of the laser fiber displacement system that is coupled to the cooling catheter as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage, and wherein the sleeve resists longitudinal displacement of the cooling catheter; and
transmitting laser energy through the laser fiber to ablate a second tissue zone in the target ablation region.
16 . The method of claim 15 , wherein displacing the laser fiber comprises remotely activating the displacement device.
17 . The method of claim 15 , further comprising disposing the laser fiber displacement system within a magnetic resonance environment.
18 . The method of claim 15 , further comprising:
inserting the cooling catheter into a patient, wherein a distal portion of the cooling catheter is adjacent the first tissue zone; and
disposing the laser fiber through the cooling catheter, wherein a distal portion of the laser fiber extends distally beyond the distal portion of the cooling catheter.
19 . A laser fiber displacement device, comprising:
a housing;
a linear displacement member comprising:
a linear slide coupled to the housing;
a carriage slidingly coupled to the linear slide, wherein the carriage is configured to longitudinally move relative to the housing along the linear slide between a proximal position of the carriage and a distal position of the carriage;
a clamp coupled to the carriage, the clamp comprising a slot extending into a side of the clamp, wherein the slot extends along a longitudinal length of the carriage, wherein the slot is configured to selectively receive a laser fiber, the laser fiber being configured for sliding movement within a cooling catheter; and
a motor coupled to the carriage, wherein the motor is configured to longitudinally move the carriage between the proximal position of the carriage and the distal position of the carriage; and
a sleeve configured to couple to the housing and comprising a lumen, the sleeve configured to selectively couple to the cooling catheter and receive the laser fiber through the lumen, wherein the sleeve is configured to resist longitudinal compression and maintain a position of the cooling catheter relative to the housing when the linear displacement member displaces the laser fiber relative to the cooling catheter through the lumen as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage.
20 . The laser fiber displacement device of claim 19 , wherein the laser fiber displacement device is configured to be used in a magnetic resonance environment, and wherein the laser fiber is prevented from rotating as the carriage longitudinally moves between the proximal position of the carriage and the distal position of the carriage.