Systems, methods, and apparatuses for debriding a tissue site, such as a wound, involve using solid CO2 particles and reduced pressure to cut and remove undesired tissue in a controlled manner. The system may urge the undesired tissue into a treatment cavity and then cut the undesired tissue with im
Systems, methods, and apparatuses for debriding a tissue site, such as a wound, involve using solid CO2 particles and reduced pressure to cut and remove undesired tissue in a controlled manner. The system may urge the undesired tissue into a treatment cavity and then cut the undesired tissue with impinging CO2 particles. The CO2 particles sublime into a gas and present little or no mess. Other systems, methods, and apparatuses are presented.
대표청구항▼
1. A system for removing undesired tissue from a tissue site, the system comprising: a treatment head having a first surface, a second surface opposite the first surface, a treatment cavity extending into the treatment head from the second surface, a delivery aperture opening into the treatment cavi
1. A system for removing undesired tissue from a tissue site, the system comprising: a treatment head having a first surface, a second surface opposite the first surface, a treatment cavity extending into the treatment head from the second surface, a delivery aperture opening into the treatment cavity, and a removal aperture opening into the treatment cavity, the delivery aperture and the removal aperture face each other and are aligned on at least two orthogonal planes, the removal aperture has a dimension substantially smaller than a dimension of the treatment cavity to form a restricted passage;a handle directly coupled to the treatment head to form an obtuse angle with the first surface of the treatment head;a working gas supply source adapted to supply a working gas at a positive pressure to the delivery aperture;a CO2 source adapted to supply solid CO2 particles having a diameter between about 10 microns and about 1000 microns to the working gas;wherein the delivery aperture and the removal aperture are disposed on opposing sides of the treatment cavity and face each other such that movement of the working gas between the delivery aperture and the removal aperture generates a pressure in the treatment cavity that is lower than an ambient pressure that urges uncut undesired tissue into the treatment cavity. 2. The system for removing undesired tissue of claim 1, further comprising: a reduced-pressure source for supplying reduced pressure to the treatment head;wherein an extraction conduit is fluidly coupled to the reduced-pressure source; andwherein the treatment head and the extraction conduit are adapted to carry away the undesired tissue under reduced pressure. 3. The system for removing undesired tissue of claim 1, wherein the CO2 source is operable to control a feed rate of the solid CO2 particles. 4. The system for removing undesired tissue of claim 1, wherein: the treatment head further comprises a delivery conduit and a removal conduit;the delivery conduit is fluidly coupled to the delivery aperture and the working gas supply source;the removal conduit is fluidly coupled to the removal aperture and a reduced-pressure source; andthe delivery aperture and the removal aperture are substantially aligned. 5. The system for removing undesired tissue of claim 1, wherein the system further comprises a collection member fluidly coupled to the treatment head and a reduced-pressure source to receive the undesired tissue. 6. The system for removing undesired tissue of claim 1, wherein the system further comprises a CO2 switch coupled to the CO2 source, the CO2 switch for controlling a feed rate of the solid CO2 particles from the CO2 source. 7. The system for removing undesired tissue of claim 1, further comprising: a master controller associated with the working gas supply source and the CO2 source, the master controller comprising: a working gas control switch for controlling an amount of the working gas transferred from the working gas supply source to the treatment head, anda CO2 switch for controlling an amount of the solid CO2 particles transferred from the CO2 source into the working gas. 8. The system for removing undesired tissue of claim 1, further comprising: a foot pedal associated with the working gas supply source and the CO2 source, the foot pedal comprising: a working gas control switch for controlling an amount of the working gas transferred from the working gas supply source to the treatment head, anda CO2 switch for controlling an amount of the solid CO2 particles transferred from the CO2 source into the working gas. 9. The system for removing undesired tissue of claim 1, further comprising: a master controller associated with the working gas supply source and the CO2 source, the master controller comprising: a treatment mixture switch for controlling an amount of the solid CO2 particles and the working gas transferred from the working gas supply source and the CO2 source to the treatment head. 10. A system for removing undesired tissue from a tissue site of a patient, the system comprising: a working gas supply source adapted to supply a working gas at a positive pressure;a CO2 source adapted to supply solid CO2 particles;a supply conduit fluidly coupled to the working gas supply source and the CO2 source for receiving the working gas and solid CO2 particles having a diameter between about 10 microns and about 1000 microns;a treatment head having a first surface, a second surface opposite the first surface, a treatment cavity extending into the treatment head from the second surface, a delivery aperture opening into the treatment cavity, and a removal aperture opening into the treatment cavity, the delivery aperture and the removal aperture face each other and are aligned on at least two orthogonal planes, the removal aperture has a dimension substantially smaller than a dimension of the treatment cavity to form a restricted passage;a handle directly coupled to the treatment head to form an obtuse angle with the first surface of the treatment head;the treatment head fluidly coupled to the supply conduit for receiving the working gas and solid CO2 particles and delivering the working gas and solid CO2 particles to the tissue site at a desired location;wherein the delivery aperture and the removal aperture are substantially aligned on opposing sides of the treatment cavity and face each other such that movement of the working gas between the delivery aperture and the removal aperture generates a pressure in the treatment cavity that is lower than an ambient pressure that urges uncut undesired tissue into the treatment cavity; andwherein the treatment head is adapted to cause the solid CO2 particles to impinge upon at least a portion of the undesired tissue in the treatment cavity so as to remove the undesired tissue.
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