Implantable medical instrument with MRI mode

An implantable medical and device technology, used in implanted stimulators, therapy, electrotherapy, etc., can solve problems such as potential safety hazards, affecting pulse stimulation pulses, and decreasing inductance, so as to avoid potential safety hazards and improve safety.

Inactive Publication Date: 2018-02-23
BEIJING PINS MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a strong magnetic field environment, such as a magnetic resonance imaging (MRI) environment, the inductance of the magnetic core in the DC-DC voltage change circuit decreases due to the saturation of the magnetic core, which will affect the stimulation pulse sent by the pulse generation circuit , thereby affecting the treatment effect on patients and bringing safety hazards

Method used

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  • Implantable medical instrument with MRI mode
  • Implantable medical instrument with MRI mode
  • Implantable medical instrument with MRI mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] see Figure 9 , in Embodiment 1, the pulse generator 12 automatically switches between the MRI mode and the normal mode according to the external strong magnetic field information detected by the magnetic field sensor 104 . The magnetic field sensor 104 is always in working state. Specifically, the workflow of the pulse generator 12 of the deep brain electrical stimulator 10 includes the following steps:

[0098] Step S11, detecting the external magnetic field and judging whether the magnetic induction of the external magnetic field exceeds the first threshold, if yes, proceed to step S12, if not, continue to repeat step S11;

[0099] Step S12, record the time when the external strong magnetic field is detected and the state of the pulse generator 12, mark that it is in a strong magnetic field environment, and enter step S13;

[0100] Step S13, switch to MRI mode, mark the MRI mode switching event, and enter step S14;

[0101] Step S14, judging whether the magnetic i...

Embodiment 2

[0123] see Figure 12 , in embodiment 2, the workflow of the pulse generator 12 of described deep brain electrical stimulator 10 comprises the following steps:

[0124] Step S10, judging whether a monitoring instruction from the peripheral controller is received, if yes, proceed to step S11, if not, continue to repeat step S10;

[0125] Step S11, start to detect the external magnetic field and judge whether the magnetic induction of the external magnetic field exceeds the first threshold, if yes, enter step S12, if no, continue to repeat step S11;

[0126] Step S12, record the time when the external strong magnetic field is detected and the state of the pulse generator 12, mark that it is in a strong magnetic field environment, and enter step S13;

[0127] Step S13, switch to MRI mode, mark the MRI mode switching event, and enter step S14;

[0128] Step S14, judging whether the magnetic induction of the external magnetic field has dropped below the second threshold, if yes, ...

Embodiment 3

[0139] see Figure 13 , in embodiment 3, the workflow of the pulse generator 12 of described deep brain electrical stimulator 10 comprises the following steps:

[0140] Step S10, judging whether an instruction to switch to MRI mode from the peripheral controller is received, if yes, enter step S11, if no, continue to repeat step S10;

[0141] Step S11, switch to MRI mode, and enter step S12;

[0142] Step S12, judging whether an instruction to switch to the normal mode from the peripheral controller is received, if yes, go to step S15, if not, go to step S13;

[0143] Step S13, judging whether the time threshold is exceeded, if yes, enter step S14, if no, return to step S12;

[0144] Step S14, switch to normal mode, record the timeout switching event, and enter step S15;

[0145] Step S15, judging whether an inquiry command from the peripheral controller is received, if yes, proceed to step S16, if not, proceed to step S17;

[0146] Step S16, send timeout switching event inf...

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Abstract

The present invention relates to a working method of an implantable medical device with an MRI mode, which includes the following steps: step S11, detecting an external magnetic field and judging whether the magnetic induction intensity of the external magnetic field exceeds a first threshold, if so, entering step S12, If not, continue to repeat step S11; step S12, record the time when the external strong magnetic field is detected and the state of the pulse generator, mark it in a strong magnetic field environment, and enter step S13; step S13, switch to MRI mode, and mark the MRI mode switching event , and enter step S14; step S14, judge whether the magnetic induction intensity of external magnetic field drops below the second threshold value, if yes, then enter step step S15, if not, then repeat step S14; step S15, record the disappearance of external strong magnetic field Time and state of the pulse generator, mark leaving the strong magnetic field environment, and enter step S16; and step S16, switch to normal mode, mark the MRI mode switching event, and return to step S11. The invention also relates to an implantable medical device.

Description

technical field [0001] The present invention relates to the related technical field of medical devices, in particular, to an implantable medical device (Implantable Medical Device, IMD). Background technique [0002] There are many types of implantable medical devices, such as pacemakers and defibrillators, implanted neurostimulators, implanted muscle stimulators, and more. Implantable medical devices generally include implanted devices inside the body and control devices outside the body, and information is exchanged between the two through two-way wireless communication. [0003] In the existing technology, implantable medical devices are generally powered by batteries, and a stimulation pulse of a specific frequency is sent out through a pulse generation circuit to stimulate a specific target point, thereby improving the patient's symptoms. The pulse generating circuit usually includes a DC-DC voltage conversion circuit. However, in a strong magnetic field environment, ...

Claims

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Application Information

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IPC IPC(8): A61N1/372
CPCA61N1/37235A61N1/3605
Inventor 不公告发明人
Owner BEIJING PINS MEDICAL
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