[미국특허]
Method of mixing bone cement with a power tool including monitoring the mixing of the cement based on data regarding characteristics of components forming the cement and the current drawn by the power tool
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01F-007/00
B01F-013/06
출원번호
US-0617052
(2009-11-12)
등록번호
US-8657482
(2014-02-25)
발명자
/ 주소
Malackowski, Don
Tague, Christopher M.
출원인 / 주소
Stryker Corporation
인용정보
피인용 횟수 :
172인용 특허 :
35
초록▼
A system and method for mixing bone cement. The components forming the cement are contained in a cartridge. A motorized device, such as a surgical handpiece, rotates a blade in the cartridge that mixes the cement. The current drawn by the motor is monitored. The current draw is evaluated to determin
A system and method for mixing bone cement. The components forming the cement are contained in a cartridge. A motorized device, such as a surgical handpiece, rotates a blade in the cartridge that mixes the cement. The current drawn by the motor is monitored. The current draw is evaluated to determine the viscosity of the cement. If the current draw indicates that the cement is at the target viscosity, the mixing may be terminated. A low current draw measure may be interpreted as an indication that the cement is of low viscosity and that it may be necessary to continue the mixing process.
대표청구항▼
1. A method for mixing medical/surgical cement, said method including the steps of: electronically reading data from a packet of bone cement to a control processor, the data describing at least one characteristic of the bone cement;placing the contents of the bone cement packet and a cement monomer
1. A method for mixing medical/surgical cement, said method including the steps of: electronically reading data from a packet of bone cement to a control processor, the data describing at least one characteristic of the bone cement;placing the contents of the bone cement packet and a cement monomer in a mixing container, the mixing container having a mixing blade;with the control processor, based on the read data regarding the characteristics of the bone cement, determining the current a power tool should draw when actuated to mix the bone cement and the cement monomer;actuating the mixing blade with the power tool so as to mix the bone cement and the cement monomer together to form a cement mixture;monitoring the current drawn by the power tool to actuate the mixing blade; andwith the control processor, compare the current drawn by the power tool with the previously determined current draw to evaluate the state to the cement mixture. 2. The method of mixing medical/surgical cement of claim 1, further including the steps of: with the control processor, based on the current drawn by the power tool to actuate the mixing blade, determine the state of the cement mixture; andbased on said determination of the state of the cement mixture, displaying data indicating the state of the cement mixture. 3. The method of mixing bone cement of claim 1, further including the steps of: electronically reading cement monomer data from a container of cement monomer to the control processor;in said step of placing cement monomer in the mixing container, placing in the mixing container cement monomer from the container from which the cement monomer data are read; andas part of said step of determining the current the power tool should draw, the control processor further determines the current based on the cement monomer data read from the cement monomer container to the control processor. 4. The method of mixing bone cement of claim 3, wherein said step of reading data from the container of cement monomer to the control processor is performed prior to said step of placing the cement monomer in the mixing container. 5. The method of mixing bone cement of claim 1, wherein: in said step of determining the current the power tool should draw, the control processor determines the current the power tool should draw at a period in time after the power tool is actuated; andsaid steps of monitoring the current drawn by the power tool and comparing the drawn current to the previously determined current are performed at the time after the power tool is actuated for which the current draw is determined. 6. The method of mixing bone cement of claim 1, wherein: based on the data read from the bone cement packet, the control processor further determines at least one characteristic of the operation of the power tool; andduring said actuation of the mixing blade, the control processor controls the operation of the power tool based on the previously determined at least one characteristic of power tool operation. 7. The method of mixing bone cement of claim 1, wherein said step of reading data from the packet of bone cement to the control processor is performed prior to said step of placing the bone cement in the mixing container. 8. A method of mixing bone cement, said method comprising the steps of: electronically reading data from a packet of bone cement to a control processor, the data describing at least one characteristic of the bone cement;placing the bone cement in a cement mixer;electronically reading data from a container of cement monomer to the control processor, the data describing at least one characteristic of the cement monomer;placing the cement monomer in the cement mixer;with the control processor, based on the read data regarding the characteristics of bone cement and the cement monomer, determining at least one variable associated with the mixing of the bone cement; andwith a power tool, mixing the bone cement and the monomer together in the cement mixer wherein the operation of the power tool is regulated by the control processor and the control processor regulates the operation of the power tool based on the at least one determined variable. 9. The method of mixing bone cement of claim 8, further including the steps of: further entering into the control processor data indicating at least one of: a selected set time for the cement; a selected porosity of the cement; the type of power tool used to mix the cement; the type of cement mixer in which the cement is to be mixed; the ambient temperature; or the ambient relative humidity; andwith the control processor, based on the further entered data, further determining the at least one variable associated with the mixing of the bone cement. 10. The method of mixing bone cement of claim 8, wherein, based on the read data describing at least one characteristic of the bone cement, the control processor displays a message indicating at least one type of cement monomer from a plurality of different types of cement monitor that is acceptable for use with the bone cement. 11. The method of mixing bone cement of claim 8, wherein: based on the read data describing at least one characteristic of the cement monomer, the control processor determines if the cement monomer is acceptable for use; andif the cement monomer is not acceptable for use, the control processor generates a warning indicating that the cement monomer is not acceptable. 12. The method of mixing bone cement of claim 8, wherein: based on the read data describing at least one characteristic of the bone cement and on the read data describing at least one characteristic of the cement monomer, the control processor determines if the cement monomer is acceptable for use with the bone cement; andif the cement monomer is not acceptable for use bone cement, the control processor generates a warning indicating that the cement monomer is not acceptable. 13. The method of mixing bone cement of claim 8, wherein said step of reading data from the packet of bone cement to the control processor is performed prior to said step of placing the bone cement in the cement mixer. 14. The method of mixing bone cement of claim 8, wherein said step of reading data from the container of cement monomer to the control processor is performed prior to said step of placing the cement monomer in the cement mixer.
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