Apparatus and method for the dispensing of bone cement
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0075652
(2008-03-13)
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등록번호 |
US-8241295
(2012-08-14)
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발명자
/ 주소 |
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출원인 / 주소 |
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대리인 / 주소 |
Schultz & Associates, P.C.
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인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
Apparatus and method to dispense PMMA bone cement including a temperature controller, a disposable cement cartridge and a means for extracting cement from the cement cartridge so that the temperature of the extracted cement is first cooled to discourage polymerization and to prolong working time, th
Apparatus and method to dispense PMMA bone cement including a temperature controller, a disposable cement cartridge and a means for extracting cement from the cement cartridge so that the temperature of the extracted cement is first cooled to discourage polymerization and to prolong working time, then warmed so as to control viscosity of the cement flowing into the desired bone repair location. A first embodiment includes a spiral cement cartridge along with a means for extracting cement therefrom. A second embodiment includes a linear disposable cement cartridge along with a means for extracting cement therefrom. A color matching mechanism identifies cement temperature and viscosity during dispensation. A manual cement dispensing method includes a calibrated hand crank mechanism for causing calibrated delivery of cement. An automatic cement dispensing method uses a stepper motor and computer programmed means for causing calibrated flow of cement.
대표청구항
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1. An apparatus for dispensing a temperature sensitive cement during a surgical operation comprising: a housing having a cement exit port;a flexible cement packet, within the housing, containing the temperature sensitive cement;a thermocouple assembly providing a first temperature controlled region
1. An apparatus for dispensing a temperature sensitive cement during a surgical operation comprising: a housing having a cement exit port;a flexible cement packet, within the housing, containing the temperature sensitive cement;a thermocouple assembly providing a first temperature controlled region and a second temperature controlled region;the first temperature controlled region being adjacent the flexible cement packet;the second temperature controlled region being adjacent the cement exit port;a cement extractor means, adjacent the cement packet, for moving cement out of the flexible cement packet and toward the exit port and, wherein the cement extractor means comprises:a frame;a threaded shaft rotationally mounted in the frame;a circular disk pivotally mounted in the frame adjacent to and engaging the threaded shaft;the circular disk further comprising a radial slot containing a ball; anda guide means, adjacent the flexible cement packet, for driving the ball along the flexible cement packet when the threaded shaft is turned. 2. The apparatus of claim 1 wherein the thermocouple assembly further comprises: a first plate having a cavity in ducted communication with a selector dial;the selector dial adjacent the first plate and adjacent a second plate wherein the selector dial defines an off-center passage in ducted communication with the second plate;the second plate having a first surface and a second surface, wherein the second plate further includes a set of channels extending from the first surface to the second surface, each of the set of channels in ducted communication with a set of outlet hoses; and,a Peltier junction plate adjacent the first plate and adjacent the second plate and surrounding the selector dial. 3. The apparatus of claim 2 wherein the Peltier junction plate is electronically connected to transfer heat from the first plate to the second plate. 4. The apparatus of claim 2 wherein the Peltier junction plate is electronically connected to transfer heat from the second plate to the first plate. 5. The apparatus of claim 1 wherein the flexible cement packet further comprises a spiral cavity containing the temperature sensitive cement; and the guide means further comprises a ball guide having a spiral groove adjacent the ball and adjacent the spiral cavity;a cement receiver, adjacent the spiral cavity, having a spiral track;whereby when the circular disk is turned, the ball is advanced along the spiral groove and the spiral track and forces the temperature sensitive cement out of the spiral cavity toward the exit port. 6. The apparatus of claim 1 wherein the housing further includes an indicator means extending from the housing and adjacent a set of calibrated graticules, for indicating the amount of temperature sensitive cement in the flexible cement packet. 7. The apparatus of claim 1 wherein the housing further includes a color scale adjacent a set of transparent windows, whereby the transparent windows are aligned over the cement packet; wherein the flexible cement packet contains a transparent region adjacent the temperature sensitive cement; andwherein the temperature sensitive cement includes a colored temperature indicator. 8. The apparatus of claim 1 wherein the cement extractor is manually operated. 9. The apparatus of claim 1 wherein the cement extractor means is advanced by an electric motor controlled by a controller. 10. The apparatus of claim 9 wherein the controller is connected to a computer and the computer is programmed to advance the cement extraction means and to monitor the temperature of the Peltier junction. 11. The apparatus of claim 1 wherein the cement exit port includes a set of alternative exit ports and a set of outlet hoses is connected to the set of alternative exit ports. 12. The apparatus of claim 1 wherein the cement packet is further comprised of: an upper surface sealed to a lower surface;a tubular cavity formed between the upper surface and the lower surface which contains the temperature sensitive cement. 13. The apparatus of claim 12 wherein the tubular cavity is preformed in a spiral geometry. 14. The apparatus of claim 1 wherein the temperature sensitive cement is PMMA cement. 15. The apparatus of claim 1 wherein the temperature sensitive cement includes a visual catylization indicator dye. 16. An apparatus for dispensing a temperature sensitive cement during a surgical operation comprising: a housing having a cement exit port;a flexible cement packet, within the housing, containing the temperature sensitive cement;a thermocouple assembly providing a first temperature controlled region and a second temperature controlled region;the first temperature controlled region being adjacent the flexible cement packet;the second temperature controlled region being adjacent the cement exit port;a cement extractor means, adjacent the cement packet, for moving cement out of the flexible cement packet and toward the exit port; and wherein the cement extractor means comprises:a frame having a first end plate connected to a second end plate by a first guide rail and a second guide rail;a shaft, having a first set of threads, rotatably mounted in the frame, wherein the shaft is generally parallel to the first guide rod and the second guide rod;a block, slidably mounted on the first guide rail and the second guide rail;the block further includes a hole having a second set of threads, wherein the first set of threads engages the second set of threads, whereby the block translates along the shaft when the shaft is rotated in the frame;a semi-cylindrical protrusion mounted on the block, adjacent the flexible cement packet; andwherein the semi-cylindrical protrusion advances along the flexible cement packet when the block translates along the shaft. 17. The apparatus of claim 16 wherein the thermocouple assembly further comprises: a first plate having a cavity in ducted communication with a selector dial;the selector dial adjacent the first plate and adjacent a second plate wherein the selector dial defines an off-center passage in ducted communication with the second plate;the second plate having a first surface and a second surface, wherein the second plate further includes a set of channels extending from the first surface to the second surface, each of the set of channels in ducted communication with a set of outlet hoses; and,a Peltier junction plate adjacent the first plate and adjacent the second plate and surrounding the selector dial. 18. The apparatus of claim 17 wherein the Peltier junction plate is electronically connected to transfer heat from the first plate to the second plate. 19. The apparatus of claim 17 wherein the Peltier junction plate is electronically connected to transfer heat from the second plate to the first plate. 20. The apparatus of claim 16 wherein the housing further includes an indicator means extending from the housing and adjacent a set of calibrated graticules, for indicating the amount of temperature sensitive cement in the flexible cement packet. 21. The apparatus of claim 16 wherein the housing further includes a color scale adjacent a set of transparent windows, whereby the transparent windows are aligned over the cement packet; wherein the flexible cement packet contains a transparent region adjacent the temperature sensitive cement; andwherein the temperature sensitive cement includes a colored temperature indicator. 22. The apparatus of claim 16 wherein the cement extractor is manually operated. 23. The apparatus of claim 16 wherein the cement extractor means is advanced by an electric motor controlled by a controller. 24. The apparatus of claim 23 wherein the controller is connected to a computer and the computer is programmed to advance the cement extraction means and to monitor the temperature of the Peltier junction. 25. The apparatus of claim 16 wherein the cement exit port includes a set of alternative exit ports and a set of outlet hoses is connected to the set of alternative exit ports. 26. The apparatus of claim 16 wherein the cement packet is further comprised of: an upper surface sealed to a lower surface;a tubular cavity formed between the upper surface and the lower surface which contains the temperature sensitive cement. 27. The apparatus of claim 26 wherein the tubular cavity is preformed in a linear geometry. 28. The apparatus of claim 16 wherein the temperature sensitive cement is PMMA cement. 29. The apparatus of claim 16 wherein the temperature sensitive cement includes a visual catylization indicator dye. 30. The apparatus of claim 16 wherein the cement extractor means further comprises: a rod, having a cylindrical roller slidably mounted thereon, and adjacent the flexible cement packet connected to the block;a selector attached to the cylindrical roller and slidably mounted on the rod, whereby the selector extends through the housing. 31. The apparatus of claim 16 wherein the thermocouple further comprises: an array of individual hot plates adjacent an array of individual Peltier junction plates, wherein each individual Peltier junction plate is thermally insulated from each other individual Peltier junction plate;an array of individual cold plates, each having a first end and a second end, adjacent the array of Peltier junction plates; andwherein the flexible cement packet is comprised of a set of individual cement packets, where each individual cement packet is adjacent each individual cold plate.
이 특허에 인용된 특허 (6)
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Brandys, Frank A.; Irwin, Michael J.; Tarbutton, Kent S., Ambient-temperature-stable, one-part curable epoxy adhesive.
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Teung, Patrick; Cima, Michael J.; Pryor, Timothy J.; Materna, Peter A., Method and system for controlling the temperature of a dispensed liquid.
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Welle Richard P., Method of pumping a fluid through a micromechanical valve having N-type and P-type thermoelectric elements for heating a.
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Kerner James M. (779 Hillgrove Chico CA 95926), Thermoelectric closed-loop heat exchange system.
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Venkatasubramanian,Rama; Siivola,Edward P., Thermoelectric devices utilizing double-sided Peltier junctions and methods of making the devices.
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Windisch, Robert, Thermoelectric fluid heat exchange system.
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