# US 10,368,912 B2 · Surgical fluid management systems and methods > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,368,912 B2 - Document ID: US10368912B2 - Status: Granted - Kind: B2 - Application number: 14/962,872 - Filed: 2015-12-08 - Published: 2016-03-31 - Granted: 2019-08-06 - Earliest claimed: 2011-06-29 - Assignees: Boston Scientific Scimed, Inc. - Applicants: Boston Scientific Scimed, Inc. - Inventors: Csaba Truckai; Aaron Germain; Kyle Klein; John H. Shadduck; Michael D. Walker; Benedek Orczy-Timko; Balazs Lesko - Web page: https://patentgrep.com/patent/US10368912B2 ## CPC - A61B 17/42: Gynaecological or obstetrical instruments or methods {(ligaturing clamps or clips for the umbilical cord A61B17/122; curettage A61B17/320708)} - A61B 17/320016: {Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes (A61B10/0233, A61B17/29, A61B17/3207 take precedence)} - A61B 17/3205: Excision instruments - A61B 18/1485: {having a short rigid shaft for accessing the inner body through natural openings} - A61M 1/74: {Suction control (underwater drainage A61M1/61)} - A61M 3/0208: {before use} - A61M 3/0212: {after use} - A61M 3/0216: {Pressure} - A61M 3/022: {Volume; Flow rate} - A61M 3/0229: {Devices operating in a closed circuit, i.e. recycling the irrigating fluid} - A61B 2017/4216: {Operations on uterus, e.g. endometrium} - A61B 2018/00196: {reciprocating lengthwise} - A61B 2018/00559: {Female reproductive organs} - A61B 2018/00601: {Cutting} - A61M 1/777: {Determination of loss or gain of body fluids due to suction-irrigation, e.g. during surgery} - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 2205/50: with microprocessors or computers - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract A fluid management system for use with a fluid reservoir includes an inflow pump and an outflow pump. The inflow pump is connectable to a probe for delivering a distention fluid to a body cavity. The outflow pump removes the distention fluid through the same probe, thus establishing a re-circulating volume of distention fluid within the body cavity. The removed fluid is filtered and returned to a fluid reservoir for eventual recycling to the body cavity. A controller adjusts the flow rates of the inflow pump and the outflow pump to maintain a pre-selected fluid pressure or volume within the body cavity. ## Claims ### Claim 1 A fluid management system for supplying a distending fluid to a body space or potential space, said system comprising: an inflow pump connectable to a fluid inflow line for providing an inflow of the distending fluid to the body space or potential space; an outflow pump connectable to a fluid outflow line for removing the distending fluid from the body space or potential space; wherein the inflow and outflow pumps are configured to maintain a distending fluid pressure in the body space or potential space; a first pressure sensor configured to provide a pressure signal indicative of the distending fluid pressure in the body space or potential space; a second pressure sensor configured to provide a pressure signal indicative of the distending fluid pressure in the body space or potential space; and a controller configured to compare the pressure signals from the first and second pressure sensors. ### Claim 2 (depends on 1) The fluid management system of claim 1, wherein the controller is configured to stop the inflow pump if the pressure signal from the first pressure sensor differs from the pressure signal from the second pressure sensor by a predetermined minimum amount. ### Claim 3 (depends on 2) The fluid management system of claim 2, wherein the controller is configured to maintain the distending fluid pressure in the body space or potential space within a predetermined pressure range. ### Claim 4 (depends on 1) The fluid management system of claim 1, wherein the controller is configured to maintain the distending fluid pressure in the body space or potential space within a predetermined pressure range. ### Claim 5 (depends on 1) The fluid management system of claim 1, wherein the fluid inflow line is fluidly coupled to a source of distending fluid. ### Claim 6 (depends on 5) The fluid management system of claim 5, wherein the fluid outflow line is fluidly coupled to the source of distending fluid. ### Claim 7 (depends on 6) The fluid management system of claim 6, further comprising a filter system fluidly coupled to the fluid outflow line. ### Claim 8 (depends on 7) The fluid management system of claim 7, wherein the distending fluid is re-circulated. ### Claim 9 A tissue resection system, comprising: an endoscope positionable within a body space or potential space, the endoscope including a working channel and a fluid inflow lumen; a resection device extendable through the working channel of the endoscope into the body space or potential space, the resection device including a tissue extraction lumen; a fluid management system comprising: an inflow pump configured to provide an inflow of a distending fluid through the fluid inflow lumen to the body space or potential space; an outflow pump configured to remove the distending fluid through the fluid outflow lumen from the body space or potential space; wherein the inflow and outflow pumps are configured to maintain a distending fluid pressure in the body space or potential space; a first pressure sensor configured to provide a pressure signal indicative of the distending fluid pressure in the body space or potential space; a second pressure sensor configured to provide a pressure signal indicative of the distending fluid pressure in the body space or potential space; and a controller configured to compare the pressure signals from the first and second pressure sensors. ### Claim 10 (depends on 9) The tissue resection system of claim 9, wherein the controller is configured to stop the inflow pump if the pressure signal from the first pressure sensor differs from the pressure signal from the second pressure sensor by a predetermined minimum amount. ### Claim 11 (depends on 10) The tissue resection system of claim 10, wherein the controller is configured to maintain the distending fluid pressure in the body space or potential space within a predetermined pressure range. ### Claim 12 (depends on 9) The tissue resection system of claim 9, wherein the fluid inflow lumen is fluidly coupled to a source of distending fluid. ### Claim 13 (depends on 12) The tissue resection system of claim 12, wherein the fluid outflow lumen is fluidly coupled to the source of distending fluid. ### Claim 14 (depends on 9) The tissue resection system of claim 9, wherein the resection device includes an elongate outer tube and an elongate inner tube movably positioned within the outer tube. ### Claim 15 (depends on 14) The tissue resection system of claim 14, wherein the outer tube includes a tissue receiving window and the inner tube is configured to move across the tissue receiving window to resect tissue. ### Claim 16 (depends on 14) The tissue resection system of claim 14, wherein the inner tube is configured to longitudinally reciprocate within the outer tube to resect tissue. ### Claim 17 (depends on 16) The tissue resection system of claim 16, wherein the outer tube includes a tissue receiving window and the inner tube is configured to reciprocate across the tissue receiving window to resect tissue. ### Claim 18 (depends on 17) The tissue resection system of claim 17, wherein the inner tube includes an active electrode positioned at a distal end thereof for resecting tissue. ### Claim 19 (depends on 18) The tissue resection system of claim 18, wherein the outer tube defines a return electrode providing an electrical pathway between the active electrode and the return electrode. ### Claim 20 (depends on 14) The tissue resection system of claim 14, wherein the inner tube is configured to rotate within the outer tube to resect tissue.