Fluid removal systems and methods for removing a fluid from a tissue site are presented. The systems include a semi-permeable inbound conduit, which is fluidly coupled to a treatment-fluid delivery unit, for placement proximate to the tissue site, and a semi-permeable outbound conduit, which is flui
Fluid removal systems and methods for removing a fluid from a tissue site are presented. The systems include a semi-permeable inbound conduit, which is fluidly coupled to a treatment-fluid delivery unit, for placement proximate to the tissue site, and a semi-permeable outbound conduit, which is fluidly coupled to the inbound conduit and to a treatment-fluid collector, for placement proximate to the tissue site of a patient. The treatment-fluid collector receives a treatment fluid and a recruited fluid from the tissue site. A recruited-fluid determination unit may be coupled to the treatment-fluid collector to determine a volume of the recruited fluid recruited from the patient. The treatment fluid is any fluid (including a gas) that pulls the fluid from an interstitial and intracellular space. A reduced-pressure treatment subsystem may also be included, among other things, for removing ascites and other fluids from a body cavity.
대표청구항▼
1. A fluid removal system for removing a fluid from a tissue site, comprising: a semi-permeable inbound conduit for placement proximate to the tissue site;a treatment-fluid delivery unit adapted to be fluidly coupled to the inbound conduit for delivering a treatment fluid to the inbound conduit;a se
1. A fluid removal system for removing a fluid from a tissue site, comprising: a semi-permeable inbound conduit for placement proximate to the tissue site;a treatment-fluid delivery unit adapted to be fluidly coupled to the inbound conduit for delivering a treatment fluid to the inbound conduit;a semi-permeable outbound conduit for placement proximate to the tissue site, the outbound conduit fluidly coupled to the inbound conduit;a treatment-fluid collector adapted to be fluidly coupled to the outbound conduit for receiving the treatment fluid and a recruited fluid from the tissue site; anda conduit interface for coupling the inbound conduit and the outbound conduit, the conduit interface comprising a plurality of tributary conduits sized for a patient's abdominal cavity. 2. The system for removing the fluid from the tissue site of claim 1, further comprising a recruited-fluid determination unit coupled to the treatment-fluid collector for determining a volume of the recruited fluid. 3. The system for removing the fluid from the tissue site of claim 1, wherein the treatment fluid is disposed within the inbound conduit and the outbound conduit, wherein the treatment fluid is selected from the group consisting of a hypertonic saline solution, a CaCl2 solution, a KCl solution, a NaCl solution, a Dextran solution and a dry gas. 4. The system for removing the fluid from the tissue site of claim 1, further comprising: a volume transducer for developing a signal indicative of a volume of the treatment fluid and the recruited fluid; anda treatment controller, the treatment controller comprising: a microprocessor,a memory device associated with the microprocessor,an input device associated with the microprocessor for receiving input signals,the volume transducer coupled to the input device,an output means associated with the microprocessor for delivering output signals, andwherein the microprocessor and the memory device are operable to receive an input signal from the volume transducer and to determine a recruited-fluid volume, and to develop a control signal to deliver to the output means whereby the treatment-fluid delivery unit may be controlled in response to the control signal. 5. The system for removing the fluid from the tissue site of claim 4 wherein the microprocessor and the memory device are further operable to develop a control signal to adjust a flow rate in the treatment-fluid delivery unit. 6. The system for removing the fluid from the tissue site of claim 4 wherein the treatment-fluid delivery unit further comprises a heating element and wherein the system further comprises an inbound conduit temperature transducer coupled to the treatment controller and wherein the treatment controller is further operable to receive an input signal from the temperature transducer and to develop a control signal for delivery to the treatment-fluid delivery unit to adjust the heating element. 7. The system for removing the fluid from the tissue site of claim 1, wherein the tributary conduits are sized and provided in a quantity to provide a desired surface area. 8. The system for removing the fluid from the tissue site of claim 1 wherein the inbound conduit comprises a first portion having a distal end and a proximal end, and a second portion having a distal end and a proximal end, wherein the distal end of the first portion of the inbound conduit and the proximal end of the second portion of the inbound conduit are coupled by a first coupler. 9. The system for removing the fluid from the tissue site of claim 8, wherein the outbound conduit comprises a first portion having a distal end and a proximal end, and a second portion having a distal end and a proximal end, wherein the distal end of the first portion of the outbound conduit and the proximal end of the second portion of the outbound conduit are coupled by a second coupler. 10. The system for removing the fluid from the tissue site of claim 1 further comprising an open-cavity, reduced-pressure subsystem for removing fluids from a body cavity of the patient. 11. The system for removing the fluid from the tissue site of claim 10 wherein the open-cavity, reduced-pressure subsystem comprises: a treatment device comprising: a fenestrated non-adherent drape,a plurality of encapsulated leg members coupled to the non-adherent drape, each having an interior portion with a leg manifold member and formed with fenestrations operable to allow fluid flow into the interior portion, anda central connection member fluidly coupled to the plurality of encapsulated leg members, the central connection member having a first side and a second, patient-facing side;a manifold for disposing proximate the first side of the central connection member and operable to manifold reduced pressure to the central connection member;a sealing member for disposing on a portion of the patient's epidermis and operable to form a pneumatic seal over the body cavity;a reduced-pressure delivery conduit; anda reduced-pressure interface for coupling to the sealing member and operable to fluidly couple the reduced-pressure delivery conduit to the manifold. 12. The system for removing the fluid from the tissue site of claim 11 wherein the central connection member has a connection manifold member and wherein each leg manifold member is in fluid communication with the connection manifold member. 13. The system for removing the fluid from the tissue site of claim 11 wherein the outbound conduit and the inbound conduit are coupled to at least one of the plurality of encapsulated leg members. 14. The system for removing the fluid from the tissue site of claim 11, further comprising the treatment fluid disposed within the inbound conduit and the outbound conduit, wherein the treatment fluid is selected from the group consisting of a hypertonic saline solution, a CaCl2 solution, a KCl solution, a NaCl solution, a Dextran solution and a dry gas. 15. The system for removing the fluid from the tissue site of claim 11, further comprising a volume transducer for developing a signal indicative of a volume of the treatment fluid and the recruited fluid, and a treatment controller, the treatment controller comprising: a microprocessor;a memory device associated with the microprocessor;an input device associated with the microprocessor for receiving input signals;the volume transducer coupled to the input device;an output device associated with the microprocessor for delivering output signals; andwherein the microprocessor and the memory device are operable to receive an input signal from the volume transducer and to determine a recruited-fluid volume, and to develop a control signal to deliver to the output device whereby the treatment-fluid delivery unit may be controlled in response to the control signal. 16. The system for removing the fluid from the tissue site of claim 15 wherein the microprocessor and the memory device are further operable to develop a control signal to adjust a flow rate in the treatment-fluid delivery unit. 17. The system for removing the fluid from the tissue site of claim 16 wherein the treatment-fluid delivery unit further comprises a heating element and wherein the system further comprises an inbound conduit temperature transducer coupled to the treatment controller and wherein the treatment controller is further operable to receive an input signal from the temperature transducer and to develop a control signal for delivery to the treatment-fluid delivery unit to adjust the heating element. 18. The system for removing the fluid from the tissue site of claim 11 wherein each encapsulated leg member of the plurality of encapsulated leg members comprises: a fenestrated first leg encapsulating member;a fenestrated second leg encapsulating member;wherein the leg manifold member has a first side, a second side, a first lateral edge, and a second lateral edge;wherein the first leg encapsulating member is disposed proximate the first side of the leg manifold member, the second leg encapsulating member is disposed proximate the second side of the leg manifold member, and the first leg encapsulating member and the second leg encapsulating member are coupled proximate the first lateral edge and the second lateral edge of the leg manifold member to form the first encapsulated leg member. 19. A system for removing a fluid from a tissue site, comprising: a semi-permeable inbound conduit for placement proximate to the tissue site;a treatment-fluid delivery unit adapted to be fluidly coupled to the inbound conduit for delivering a treatment fluid to the inbound conduit;a semi-permeable outbound conduit for placement proximate to the tissue site, the outbound conduit fluidly coupled to the inbound conduit;a treatment-fluid collector adapted to be fluidly coupled to the outbound conduit for receiving the treatment fluid and a recruited fluid from the tissue site; anda conduit interface for coupling the inbound conduit and the outbound conduit, the conduit interface comprising a plurality of tributary conduits sized for a patient's abdominal cavity;wherein the treatment fluid is hyperosmotic with respect to the tissue site and comprises a dry gas. 20. The system of claim 19, further comprising a recruited-fluid determination unit coupled to the treatment-fluid collector for determining a volume of the recruited fluid. 21. The system of claim 19, further comprising: a volume transducer for developing a signal indicative of a volume of the treatment fluid and the recruited fluid; anda treatment controller, the treatment controller comprising: a microprocessor,a memory device associated with the microprocessor,an input device associated with the microprocessor for receiving input signals,the volume transducer coupled to the input device,an output means associated with the microprocessor for delivering output signals, andwherein the microprocessor and the memory device are operable to receive an input signal from the volume transducer and to determine a recruited-fluid volume, and to develop a control signal to deliver to the output means whereby the treatment-fluid delivery unit may be controlled in response to the control signal. 22. The system of claim 21, wherein the microprocessor and the memory device are further operable to develop a control signal to adjust a flow rate in the treatment-fluid delivery unit. 23. The system of claim 21, wherein the treatment-fluid delivery unit further comprises a heating element and wherein the system further comprises an inbound conduit temperature transducer coupled to the treatment controller and wherein the treatment controller is further operable to receive an input signal from the temperature transducer and to develop a control signal for delivery to the treatment-fluid delivery unit to adjust the heating element. 24. The system of claim 19, wherein the inbound conduit comprises a first portion having a distal end and a proximal end, and a second portion having a distal end and a proximal end, wherein the distal end of the first portion of the inbound conduit and the proximal end of the second portion of the inbound conduit are coupled by a first coupler. 25. The system of claim 24, wherein the outbound conduit comprises a first portion having a distal end and a proximal end, and a second portion having a distal end and a proximal end, wherein the distal end of the first portion of the outbound conduit and the proximal end of the second portion of the outbound conduit are coupled by a second coupler. 26. The system of claim 19, further comprising an open-cavity, reduced-pressure subsystem for removing fluids from a body cavity of the patient. 27. The system of claim 26, wherein the open-cavity, reduced-pressure subsystem comprises: a treatment device comprising: a fenestrated non-adherent drape,a plurality of encapsulated leg members coupled to the non-adherent drape, each having an interior portion with a leg manifold member and formed with fenestrations operable to allow fluid flow into the interior portion, anda central connection member fluidly coupled to the plurality of encapsulated leg members, the central connection member having a first side and a second, patient-facing side;a manifold for disposing proximate the first side of the central connection member and operable to manifold reduced pressure to the central connection member;a sealing member for disposing on a portion of the patient's epidermis and operable to form a pneumatic seal over the body cavity;a reduced-pressure delivery conduit; anda reduced-pressure interface for coupling to the sealing member and operable to fluidly couple the reduced-pressure delivery conduit to the manifold. 28. The system of claim 27, wherein the central connection member has a connection manifold member and wherein each leg manifold member is in fluid communication with the connection manifold member. 29. The system of claim 27, wherein the outbound conduit and the inbound conduit are coupled to at least one of the plurality of encapsulated leg members. 30. The system of claim 27, wherein each encapsulated leg member of the plurality of encapsulated leg members comprises: a fenestrated first leg encapsulating member;a fenestrated second leg encapsulating member;wherein the leg manifold member has a first side, a second side, a first lateral edge, and a second lateral edge;wherein the first leg encapsulating member is disposed proximate the first side of the leg manifold member, the second leg encapsulating member is disposed proximate the second side of the leg manifold member, and the first leg encapsulating member and the second leg encapsulating member are coupled proximate the first lateral edge and the second lateral edge of the leg manifold member to form the first encapsulated leg member.
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