# US 2014/0151017 A1 · Heating/cooling system for indwelling heat exchange catheter > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0151017 A1 - Document ID: US20140151017A1 - Status: Published application - Kind: A1 - Application number: 14/175,386 - Filed: 2014-02-07 - Published: 2014-06-05 - Earliest claimed: 2001-09-25 - Assignees: Zoll Circulation, Inc. - Applicants: Zoll Circulation, Inc. - Inventors: Wayne Noda; Stelica Stelea - Web page: https://patentgrep.com/patent/US20140151017A1 ## CPC - F04C 2/18: with similar tooth forms (F04C2/16 takes precedence) - A61F 7/12: Devices for heating or cooling internal body cavities - F04C 15/0069: {Magnetic couplings} - F04C 29/0064: {Magnetic couplings} - F04D 13/024: {a magnetic coupling} - F04D 29/606: {Mounting in cavities} - F25D 17/02: for circulating liquids, e.g. brine - A61F 7/0085: {Devices for generating hot or cold treatment fluids} - A61F 2007/0054: {with a closed fluid circuit, e.g. hot water} - A61F 2007/0093: {programmed} - A61F 2007/0096: {with a thermometer} - A61F 2007/126: {for invasive application, e.g. for introducing into blood vessels} - F25B 2400/01: Heaters - F25B 2600/0253: with variable speed - F25B 2700/1351: of the cooled fluid upstream or downstream of the evaporator - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS ## Abstract A cooling system for an indwelling heat exchange catheter includes a heat exchange bath that is configured to receive a conduit that carries saline to and from the catheter. A heating/cooling fluid is in the bath and exchanges heat with the saline. The heating/cooling fluid flows through a heat exchanger that includes a refrigerant and two variable speed DC compressor for removing heat from the refrigerant. A gear pump circulates the working fluid to and from the catheter and is removably engaged with a pump support platform. ## Claims ### Claim at position 1 1-22. (canceled) ### Claim 23 A heat exchanger comprising: at least one computer readable storage medium; and at least one processor configured to execute instructions on the computer readable storage medium to undertake logic comprising: determining whether pulses from a flow detector of the heat exchanger are being received; responsive to a determination that pulses are being received, determining whether a timer has expired; responsive to a determination that the timer has expired, returning an error message; and responsive to a determination that pulses are not being received, returning an error message. ### Claim 24 (depends on 23) The heat exchanger of claim 23, wherein the pulses represent motion of a paddle wheel through light beams. ### Claim 25 (depends on 24) The heat exchanger of claim 24, wherein the light beams are established by light emitting diodes in the heat exchanger. ### Claim 26 (depends on 23) The heat exchanger of claim 23, wherein the logic further comprises: responsive to a determination that pulses are not present, determining whether plural light emitting diode (LED)/infrared transmitter (IRT) pairs are energized; responsive to a determination that all LED/IRT pairs are energized, determining whether all LED/IRT pairs are operating properly. ### Claim 27 (depends on 26) The heat exchanger of claim 26, wherein the logic when executed by the processor further includes determining whether all LED/IRT pairs are operating properly at least in part by sequentially toggling the LED/IRT pairs on and off. ### Claim 28 (depends on 27) The heat exchanger of claim 27, wherein the logic when executed by the processor further includes responsive to a determination that all LED/IRT pairs are energized, determining whether a subset of the LED/IRT pairs are energized. ### Claim 29 (depends on 28) The heat exchanger of claim 28, wherein the logic when executed by the processor further includes responsive to a determination that the subset of the LED/IRT pairs are energized, determining whether signal pulses are present. ### Claim 30 (depends on 23) The heat exchanger of claim 23, wherein the logic when executed by the processor further includes responsive to a determination that pulses are being received, determining whether all of plural light emitting diode (LED)/infrared transmitter (IRT) pairs are energized. ### Claim 31 A heat exchanger comprising: at least one computer readable storage medium; and at least one processor configured to execute instructions on the computer readable storage medium to undertake logic comprising: periodically energizing a heater of the heat exchange system; determining whether an increase in temperature satisfying a threshold is indicated; responsive to a determination that an increase in temperature satisfying a threshold is indicated, returning a message indicating an error in circulation of a glycol circuit of the heat exchanger. ### Claim 32 (depends on 31) The heat exchanger of claim 31, wherein the logic when executed by the processor further includes responsive to a determination that an increase in temperature satisfying a threshold is indicated, deenergizing the heater.