# US 12,108,985 B2 · Fluid management system with integrated laser fiber cooling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,108,985 B2 - Document ID: US12108985B2 - Status: Granted - Kind: B2 - Application number: 17/388,535 - Filed: 2021-07-29 - Published: 2022-02-03 - Granted: 2024-10-08 - Earliest claimed: 2020-07-30 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Michelle Maher; Lee Smith; William Stanhope; Nishant Khattar; Eric Wong; Niraj Prasad Rauniyar; Logan Ernster - Web page: https://patentgrep.com/patent/US12108985B2 ## CPC - A61B 18/22: the beam being directed along or through a flexible conduit, e.g. an optical fibre; {Couplings or} hand-pieces therefor - A61B 2018/00029: {open} - A61B 2018/00642: {with feedback, i.e. closed loop control} - A61B 2018/00678: {upper} - A61B 2018/00714: {Temperature} - A61B 2018/00791: {Temperature} - A61B 2018/00982: {combined with or comprising means for visual or photographic inspections inside the body, e.g. endoscopes} - A61B 2018/2253: {characterised by additional functions, e.g. surface cooling or detecting pathological tissue} - A61B 2018/2272: {with reflective or refractive surfaces for deflecting the beam (A61B2018/2261, A61B2018/2266 take precedence)} - A61B 2562/0247: Pressure sensors - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) ## 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. ## Claims ### Claim 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. ### Claim 2 (depends on 1) The medical system of claim 1, wherein the cooling pump is a peristaltic pump. ### Claim 3 (depends on 1) The medical system of claim 1, wherein the cooling pump is a diaphragm pump. ### Claim 4 (depends on 1) The medical system of claim 1, wherein the cooling pump is a positive displacement pump. ### Claim 5 (depends on 1) The medical system of claim 1, wherein the cooling pump includes a disposable, single-use pump head. ### Claim 6 (depends on 1) 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. ### Claim 7 (depends on 1) 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. ### Claim 8 (depends on 1) 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. ### Claim 9 (depends on 1) 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. ### Claim 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. ### Claim 11 (depends on 10) 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. ### Claim 12 (depends on 10) 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. ### Claim 13 (depends on 10) 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. ### Claim 14 (depends on 10) 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. ### Claim 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. ### Claim 16 (depends on 15) The medical system of claim 15, wherein the cooling channel terminates at a distal port proximal a distal end of the elongate tubular member. ### Claim 17 (depends on 16) The medical system of claim 16, wherein laser energy exits the elongate tubular member through the distal port. ### Claim 18 (depends on 15) 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. ### Claim 19 (depends on 15) 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. ### Claim 20 (depends on 15) 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.