Fluid management system with integrated laser fiber cooling

Patent metadata

Field	Value
Publication number	US-12108985-B2
Application number	US-202117388535-A
Country	US
Kind code	B2
Filing date	Jul 29, 2021
Priority date	Jul 30, 2020
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A medical system may include: a medical device including an elongate shaft configured to access a treatment site within a patient and a handle coupled to a proximal end of the elongate shaft; a laser device including an elongate tubular member configured for insertion through a working lumen of the medical device, the elongate tubular member including a cooling channel and a laser fiber extending distally within the cooling channel; and a fluid management system including an inflow pump configured to pump fluid from a first fluid supply source through the elongate shaft to the treatment site, a cooling pump configured to pump fluid from a second fluid supply source through the cooling channel, and a controller configured to control the inflow pump and the cooling pump.

First claim

What is claimed is:

1. A medical system, comprising:
an endoscope comprising:
an elongate shaft configured to access a treatment site within a patient; and
a handle coupled to a proximal end of the elongate shaft;

a laser device including an elongate tubular member configured for insertion through a working lumen of the elongate shaft of the endoscope, the elongate tubular member including a cooling channel and a laser fiber extending distally within the cooling channel; and
a fluid management system comprising:
an inflow pump configured to pump fluid from a first fluid supply source through the elongate shaft to the treatment site;
a cooling pump configured to pump fluid from a second fluid supply source through the cooling channel; and
a controller configured to control the inflow pump and the cooling pump.

2. The medical system of claim 1 , wherein the cooling pump is a peristaltic pump.

3. The medical system of claim 1 , wherein the cooling pump is a diaphragm pump.

4. The medical system of claim 1 , wherein the cooling pump is a positive displacement pump.

5. The medical system of claim 1 , wherein the cooling pump includes a disposable, single-use pump head.

6. The medical system of claim 1 , wherein the fluid management system includes a pressure sensor disposed between the cooling pump and a distal end of the cooling channel.

7. The medical system of claim 1 , wherein the fluid management system includes a pressure sensor disposed between the second fluid supply source and the cooling pump.

8. The medical system of claim 1 , wherein the cooling pump is configured to pump fluid through the cooling channel at a fluid flow rate between 0 mL/minute and 100 mL/minute.

9. The medical system of claim 1 , wherein the cooling pump is configured to pump fluid through the cooling channel at a fluid pressure between 0 mmHg and 500 mmHg.

10. A medical system, comprising:
an endoscope comprising:
an elongate shaft configured to access a treatment site within a patient; and
a handle coupled to a proximal end of the elongate shaft;

a laser device including an elongate tubular member configured for insertion through a working lumen of the elongate shaft of the endoscope, the elongate tubular member including a cooling channel and a laser fiber extending distally within the cooling channel; and
a fluid management system comprising:
an inflow pump configured to pump fluid from a first fluid supply source through the elongate shaft to the treatment site;
a cooling pump configured to pump fluid from a second fluid supply source through the cooling channel; and
a controller configured to control the inflow pump and the cooling pump;

wherein the laser device includes a laser controller in electronic communication with the controller of the fluid management system.

11. The medical system of claim 10 , wherein when the laser controller increases laser power, the controller of the fluid management system speeds up the cooling pump.

12. The medical system of claim 10 , wherein when the laser controller terminates laser power, the controller of the fluid management system shuts down the cooling pump.

13. The medical system of claim 10 , wherein the laser controller delays activation of laser power until after the controller of the fluid management system activates the cooling pump.

14. The medical system of claim 10 , wherein the laser controller monitors a temperature of a distal end of the laser fiber and instructs the controller of the fluid management system to increase cooling pump speed if the temperature exceeds a predetermined limit.

15. A medical system, comprising:
an endoscope comprising:
an elongate shaft configured to access a treatment site within a patient; and
a handle coupled to a proximal end of the elongate shaft;

a laser device including an elongate tubular member configured for insertion through a working lumen of the elongate shaft of the endoscope, the elongate tubular member including a cooling channel and a laser fiber extending distally within the cooling channel such that the cooling channel coaxially surrounds the laser fiber; and
a fluid management system comprising:
an inflow pump configured to pump fluid from a first fluid supply source through the elongate shaft to the treatment site;
a cooling pump configured to pump fluid from a second fluid supply source through the cooling channel; and
a controller configured to control the inflow pump and the cooling pump;

wherein the laser device includes a laser controller in electronic communication with the controller of the fluid management system.

16. The medical system of claim 15 , wherein the cooling channel terminates at a distal port proximal a distal end of the elongate tubular member.

17. The medical system of claim 16 , wherein laser energy exits the elongate tubular member through the distal port.

18. The medical system of claim 15 , wherein the laser device includes a handle portion at a proximal end of the elongate tubular member, the handle portion being configured to rotate the elongate tubular member.

19. The medical system of claim 15 , wherein the controller of the fluid management system is configured to control the cooling pump to maintain a target fluid flow rate through the cooling channel based on a set of system operating parameters.

20. The medical system of claim 15 , wherein the controller of the fluid management system is configured to control the cooling pump to maintain a target fluid pressure through the cooling channel based on a set of system operating parameters.

Assignees

• Boston Scient Scimed Inc

Inventors

• Maher Michelle
• Smith Lee
• Stanhope William
• Khattar Nishant
• Wong Eric
• Rauniyar Niraj Prasad
• Ernster Logan

Classifications

• A61B2018/00982

  combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes · CPC title

• A61B2018/00791

  Temperature · CPC title

• A61B2018/00714

  Temperature · CPC title

• A61B2018/00642

  with feedback, i.e. closed loop control · CPC title

• A61B2018/00029

  open · CPC title