Fluid delivery system and method for treatment
Inventors
Kaveckis, Ryan • Harshman, Edward S. • Mayse, Martin L. • Streeter, John • True, Kyle • Gunderson, Richard C.
Assignees
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Publication Number
US-10368937-B2
Publication Date
2019-08-06
Expiration Date
Abstract
A treatment system includes a fluid cooling supply system for chilling and delivering liquid coolant to a patient. The fluid cooling supply system includes a cooling device and a heat exchanger device. The heat exchanger device is biased to the cooling device and is in fluid communication with a treatment device in a patient. The fluid cooling supply system includes at least one biasing mechanism to provide a given biasing force between the heat exchanger device and the cooling device to effectuate and improve heat transfer. The liquid coolant may be circulated through an energy delivery device positioned in an airway of a patient to preserve tissue. The system is controlled to circulate liquid coolant at a given temperature and pressure for a selected amount of time during pulmonary treatment of a patient.
Core Innovation
The described system uses a removable heat exchanger cartridge coupleable to a cooling device and a patient treatment device. A fluid channel in the cartridge carries fluid and transfers heat through a thermally conductive surface positioned against the cooling device's thermal plate. A single pump draws fluid through the cartridge at negative pressure to chill it and supplies chilled fluid to the treatment device at positive pressure.
The system also includes a fluid reservoir that receives warmed fluid from the treatment device and returns fluid through the heat exchanger cartridge for chilling. An independent claim specifies a biasing mechanism that holds the cartridge's thermally conductive surface against the cooling device's thermal plate. Because the background section is omitted in the provided content, the problem being solved is not explicitly described in patent.
Claims Coverage
The two independent claims are claim 1 and claim 23. Together, they cover six inventive features relating to the removable heat exchanger cartridge, fluid movement and return, cartridge-to-cooling-device contact, and the cartridge's fluid channel.
Removable heat exchanger cartridge
Both independent claims cover a heat exchanger cartridge removably coupleable to the cooling device and treatment device, having a plate and a thermally conductive surface defining a fluid channel. Claim 23 specifies a disposable heat exchanger cartridge.
Single pump for chilling and fluid delivery
Both independent claims cover a single pump configured to draw fluid through the cartridge's fluid channel at a negative pressure to chill the fluid and supply chilled fluid to the treatment device at a positive pressure.
Fluid reservoir in the return path
Both independent claims cover a fluid reservoir positioned in the return path between the treatment device and cartridge, configured to receive warmed fluid from the treatment device and deliver fluid through the cartridge for chilling.
Fluid connection at the first channel end
Claim 1 specifies a first port proximate to and in fluid communication with the first end of the fluid channel, configured to connect to the treatment device's fluid supply line along an axis parallel to and offset from the channel at that end.
Biasing the cartridge against the thermal plate
Claim 23 specifies at least one biasing mechanism arranged to removably couple the cartridge to the cooling device and bias the cartridge's thermally conductive surface against the cooling device's thermal plate to transfer heat from fluid.
Fluid channel providing residence time for heat transfer
Claim 23 specifies a fluid channel dimensioned to provide residence time sufficient for the fluid to undergo a temperature differential at the stated flow rate when the thermally conductive surface is biased against the thermal plate.
The two independent claims combine a removable heat exchanger cartridge with a cooling device, a single pump, and a fluid reservoir. Claim 1 specifies the first-end supply port arrangement, while claim 23 specifies biased thermal contact and a fluid channel dimensioned to provide residence time for a temperature differential.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Treatment of a patient using a treatment device configured to be positioned in the patient, with chilled fluid supplied to the treatment device.
Bronchoscopic pulmonary treatment, wherein a bronchoscope and treatment device are positioned adjacent to pulmonary tissue to deliver chilled fluid.
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