Zero-drift detection and correction in contact force measurements
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61B-005/103
A61B-018/14
A61B-019/00
A61B-018/00
출원번호
US-0938458
(2010-11-03)
등록번호
US-8979772
(2015-03-17)
발명자
/ 주소
Ludwin, Doron Moshe
Givaty, Galia
Turgeman, Aharon
Katz, Natan
출원인 / 주소
Biosense Webster (Israel), Ltd.
인용정보
피인용 횟수 :
0인용 특허 :
110
초록▼
A method, consisting of inserting a probe having a force sensor into a body cavity of a patient, and receiving from the force sensor a plurality of measurements, each of the measurements indicative of a force applied to the force sensor. The method further includes detecting that the measurements re
A method, consisting of inserting a probe having a force sensor into a body cavity of a patient, and receiving from the force sensor a plurality of measurements, each of the measurements indicative of a force applied to the force sensor. The method further includes detecting that the measurements received over a period of time of at least a specified duration have not varied by more than a predefined amount, and setting a baseline of the force sensor, for use in further measurements, to a value based on the measurements received during the period.
대표청구항▼
1. A method, comprising: inserting a probe having a force sensor into a body cavity of a patient;receiving from the force sensor a plurality of measurements, each of the measurements indicative of a force applied to the force sensor;detecting that the measurements received over a period of time of a
1. A method, comprising: inserting a probe having a force sensor into a body cavity of a patient;receiving from the force sensor a plurality of measurements, each of the measurements indicative of a force applied to the force sensor;detecting that the measurements received over a period of time of at least a specified duration have not varied by more than a predefined amount; andautomatically setting a baseline of the force sensor in a dynamic system, for use in further measurements, to a value based on the measurements received during the period. 2. The method according to claim 1, wherein the probe comprises a cardiac catheter. 3. The method according to claim 1, wherein the body cavity comprises a chamber of a heart. 4. The method according to claim 1, and comprising: applying a filter to the measurements upon detecting that the measurements have not varied by more than the predefined amount, the filter being configured to isolate filtered measurements within a specific frequency range; andsetting the baseline upon detecting that the filtered measurements do not indicate contact between the probe and the body cavity tissue. 5. The method according to claim 1, wherein setting the baseline comprises calculating a function based on the received measurements. 6. The method according to claim 5, wherein the function comprises an average of the received measurements. 7. The method according to claim 1, wherein the specified duration comprises at least a single cardiac cycle. 8. The method according to claim 1, wherein the predefined amount is greater than a noise variation of the force sensor. 9. The method according to claim 1, and comprising evaluating the force applied by a distal tip of the probe to a surface of the body cavity by subtracting the baseline from the received measurements, upon detecting that the received measurements vary by more than the predefined amount. 10. An apparatus, comprising: a probe, configured for insertion into a body cavity of a patient and comprising a force sensor for measuring a force applied to the force sensor; anda processor, which is configured to receive a plurality of measurements from the force sensor, each of the measurements indicative of the force, to detect that the measurements received over a period of time of at least a specified duration have not varied by more than a predefined amount, and to automatically set a baseline of the force sensor in a dynamic system, for use in further measurements, to a value based on the measurements received during the period. 11. The apparatus according to claim 10, wherein the probe comprises a cardiac catheter. 12. The apparatus according to claim 10, wherein the body cavity comprises a chamber of a heart. 13. The apparatus according to claim 10, wherein the processor is configured to apply a filter to the measurements upon detecting that the measurements have not varied by more than the predefined amount, the filter being configured to isolate filtered measurements within a specific frequency range, and to set the baseline upon detecting that the filtered measurements do not indicate contact between the probe and the body cavity tissue. 14. The apparatus according to claim 13, wherein the filter comprises a band-pass filter. 15. The apparatus according to claim 10, wherein the processor is configured to set the baseline by calculating a function based on the received measurements. 16. The apparatus according to claim 15, wherein the function comprises an average of the received measurements. 17. The apparatus according to claim 10, wherein the specified duration comprises at least a single cardiac cycle. 18. The apparatus according to claim 10, wherein the predefined amount is greater than a noise variation of the force sensor. 19. The apparatus according to claim 10, wherein the processor is configured to evaluate the force applied by a distal tip of the probe to a surface of the body cavity by subtracting the baseline from the received measurements, upon detecting that the received measurements vary by more than the predefined amount. 20. A computer software product, operated in conjunction with a medical probe that includes a force sensor for measuring a force applied to the force sensor, the product comprising a non-transitory computer-readable medium, in which program instructions are stored, which instructions, when read by a computer, cause the computer to receive a plurality of measurements from the force sensor, each of the measurements indicative of the force, to detect that the measurements received over a period of time of at least a specified duration have not varied by more than a predefined amount, and to automatically set a baseline of the force sensor in a dynamic system, for use in further measurements, to a value based on the measurements received during the period.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (110)
Vanney,Guy, Ablation fluid manifold for ablation catheter.
Stevens-Wright Debbie (Fitchburg MA) Russo Massimo (Brookline MA) Nielsen Peter (Quincy MA) Bertram Paul (Hudson MA), Actuator for use with steerable catheter.
Fletcher James C. Administrator of the National Aeronautics and Space Administration with respect to an invention of ( Sierra Madre CA) Feldstein Cyril (Sierra Madre CA) Lewis Gilbert W. (Arcadia CA), Catheter tip force transducer for cardiovascular research.
Imran Mir A. (Palo Alto CA) Gandhi Deepak R. (San Jose CA) Bourang Henry (Turlock CA) Quiachon Dignah B. (Palo Alto CA) Chow Andrew Y. (Sunnyvale CA), Guide wire with deflectable tip and method.
Acker David E. (Setauket NY) McNulty Ian (Naperville IL) Pacheco Robert C. (New York NY) Grandner Wayne (Port Jefferson Station NY), Magnetic determination of position and orientation.
Hossack, John A.; Curley, Michael G.; Sumanaweera, Thilaka S.; Jackson, John I., Medical diagnostic ultrasound catheter and method for position determination.
Biter, William J.; Oh, Sung J.; Hess, Stephen M., Method of sensing strain in a material by driving an embedded magnetoelastic film-coated wire to saturation.
McGee David L. (Palo Alto CA) Houser Russell A. (Livermore CA) Swanson David K. (Mountain View CA), Methods for locating and ablating accessory pathways in the heart.
Truckai Csaba (Sunnyvale CA) Jaraczewski Richard S. (Livermore CA) Nguyen Frank (San Jose CA) West Scott H. (Tracy CA), Multicurve deflectable catheter.
Maness William L. (Boston MA) Golden Robert F. (Boston MA) Benjamin Michael H. (Quincy MA) Podoloff Robert M. (Cambridge MA), Pressure and contact sensor system for measuring dental occlusion.
Papakostas, Thomas; George, Christopher; Malacaria, Charles; Lowe, Mark, Sensor with plurality of sensor elements arranged with respect to a substrate.
Falwell Gary S. (Manchester NH) Collins Russell F. (Sandown NH) Gibson ; III Charles A. (Malden MA), Snap fit distal assembly for an ablation catheter.
Rosinko, Michael J.; Khairkhahan, Alexander; Horzewski, Michael; Harman, Stuart D.; Mueller, Richard L.; Murphy-Chutorian, Douglas R., Steerable catheter with tip alignment and surface contact detector.
Gilboa, Pinhas; Tolkowsky, David; Hollander, David, System and method for determining the location of a catheter during an intra-body medical procedure.
Ben-Haim, Shlomo; Osadchy, Daniel; Peless, Udi; Greenberg, Ilan, System for determining the location and orientation of an invasive medical instrument.
Fleischman Sidney D. ; Swanson David K. ; Houser Russell A. ; Amirana Omar M., Systems and methods for creating lesions in body tissue using segmented electrode assemblies.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.