AR014021A1 - SYSTEM AND METHOD FOR DETECTING A POSITION OF A MAGNET ASSOCIATED WITH A PERMANENT MEDICAL DEVICE - Google Patents
SYSTEM AND METHOD FOR DETECTING A POSITION OF A MAGNET ASSOCIATED WITH A PERMANENT MEDICAL DEVICEInfo
- Publication number
- AR014021A1 AR014021A1 ARP980105629A AR014021A1 AR 014021 A1 AR014021 A1 AR 014021A1 AR P980105629 A ARP980105629 A AR P980105629A AR 014021 A1 AR014021 A1 AR 014021A1
- Authority
- AR
- Argentina
- Prior art keywords
- magnet
- location
- values
- magnetic field
- expected
- Prior art date
Links
Abstract
Un dispositivo para detectar la ubicacion de un imán acoplado a un dispositivo médico permanente, inserto en un paciente, emplea tres o másconjuntos de sensores magnéticos, cada uno de los cuales posee elementos sensores dispuestos deuna forma conocida. Cada elemento sensor detecta lafuerza del campo magnético generado por el imán y proporciona datos indicativos de la direccion del imán en un espacio tridimensional. El dispositivo empleaecuaciones fundamentales para la electricidad y el magnetismo que relacionan la fuerza del campo magnético medida y la gradiente del campo magnético con laubicacion y la fuerza de un dipolo magnético. El dispositivo utiliza un proceso iterativo para determinar la ubicacion y orientacion reales del imán. Unaestimacion inicial de la ubicacion y orientacion del imán resulta en la generacion de valores del campo magnético previstos. Los valores del campomagnético previstos se comparan con los valores medios reales provistos por lossensores magnéticos. Sobre la base de la diferencia entre los valores previstosy los valores medios, el dispositivo calcula una nueva ubicacion del imán y calcula nuevos valores de la fuerza del campo magnético previstos. Este procesode iteracioncontinua hasta que los valores previstos coinciden con los valores medidos, dentro de un grado deseado de tolerancia. En este punto, la ubicacionestimada coincide con la ubicacion real dentro de un grado predeterminado de tolerancia. Un visor bidimensional provee una indicacion de la ubicacion delimán con respecto a la cubierta del detector. Puede emplearse una parte del visor indicadora de la profundidad para brindar una indicacion absoluta orelativa de la profundidad a la que se encuentra el imán en el cuerpo del paciente.A device for detecting the location of a magnet coupled to a permanent medical device, inserted in a patient, employs three or more sets of magnetic sensors, each of which has sensor elements arranged in a known manner. Each sensor element detects the strength of the magnetic field generated by the magnet and provides data indicative of the direction of the magnet in a three-dimensional space. The device employs fundamental positions for electricity and magnetism that relate the strength of the measured magnetic field and the gradient of the magnetic field with the location and strength of a magnetic dipole. The device uses an iterative process to determine the actual location and orientation of the magnet. An initial estimate of the location and orientation of the magnet results in the generation of expected magnetic field values. The expected magnetic field values are compared with the actual mean values provided by the magnetic sensors. Based on the difference between the expected values and the average values, the device calculates a new location of the magnet and calculates new values of the expected magnetic field strength. This iteration process continues until the expected values coincide with the measured values, within a desired degree of tolerance. At this point, the estimated location coincides with the actual location within a predetermined degree of tolerance. A two-dimensional viewfinder provides an indication of the location delimán with respect to the detector cover. A portion of the depth indicator display may be used to provide an absolute or relative indication of the depth at which the magnet is located in the patient's body.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/075,280 US6129668A (en) | 1997-05-08 | 1998-05-08 | System and method to determine the location and orientation of an indwelling medical device |
Publications (1)
Publication Number | Publication Date |
---|---|
AR014021A1 true AR014021A1 (en) | 2001-01-31 |
Family
ID=40975801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP980105629 AR014021A1 (en) | 1998-05-08 | 1998-11-06 | SYSTEM AND METHOD FOR DETECTING A POSITION OF A MAGNET ASSOCIATED WITH A PERMANENT MEDICAL DEVICE |
Country Status (2)
Country | Link |
---|---|
AR (1) | AR014021A1 (en) |
CO (1) | CO4930326A1 (en) |
-
1998
- 1998-11-06 CO CO98065512A patent/CO4930326A1/en unknown
- 1998-11-06 AR ARP980105629 patent/AR014021A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
CO4930326A1 (en) | 2000-06-27 |
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