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Seals for lead bores of implantable medical devices

An implantable medical and sealing technology, which is applied to the parts of connecting devices, coupling devices, treatment, etc., and can solve problems such as signal leakage

Pending Publication Date: 2021-11-30
MEDTRONIC INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While small amounts of fluid may not always be a concern, it is useful for sensing where the electrical signal of interest is already very small and other nearby signals are large, such as when a relatively large cardiac signal is present near an implanted medical device. With relatively small neural signals to the brain, a small amount of fluid intrusion into the lead hole can cause enough signal to leak out to cause problems

Method used

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  • Seals for lead bores of implantable medical devices
  • Seals for lead bores of implantable medical devices
  • Seals for lead bores of implantable medical devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Embodiments provide a seal for a lead hole of an implantable medical device and / or lead extension that allows radially off-center alignment of the lead relative to the lead hole while maintaining sealing engagement with the lead body of the lead.

[0041] figure 1 An implantable medical system 100 including an implantable medical device 102 and an implantable medical lead 104 is shown. The implantable medical device 102 includes a circuit housing 110 and a head 112 mounted to the circuit housing 110, the circuit housing and the head together forming a complete device housing. Circuit housing 110 provides a sealed enclosure for circuitry 114 and an associated battery 116 that powers the circuitry. Circuitry 114 may include a stimulation engine capable of generating stimulation pulses. Circuitry 114 may also or alternatively include sensing circuitry capable of receiving physiological signals. Examples of implantable medical devices 102 include, but are not limited to,...

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Abstract

Seals used within lead bores of implantable medical devices for creating a seal to implantable medical leads inserted into the lead bores include an inner cylinder that engages the lead body. The inner cylinder is surrounded by a gap to either an outer cylinder of the seal or to surrounding structures of the implantable medical device. The inner cylinder has freedom of movement within the gap such that movement of the lead body that is off-axis relative to a centerline of the lead bore causes movement of the inner cylinder that is providing the seal. In this manner, the seal engagement to the lead body is maintained during this off-axis movement of the lead body.

Description

technical field [0001] Embodiments relate to seals placed in lead holes of implantable medical devices. Background technique [0002] The lead hole of the implantable medical device includes one or more electrical connectors that make electrical connection with corresponding electrical contacts on the proximal end of the implantable medical lead inserted into the lead hole . Conductors within the implantable medical lead carry electrical signals between the electrical contacts and electrodes located near the distal end of the lead. These electrical signals may be stimulation signals delivered to the tissue at the distal electrodes. Additionally or alternatively, these signals may be sensed physiological signals occurring at the distal electrodes that are delivered to sensing circuitry of the implanted medical device. [0003] When carrying stimulation or sensing signals on implanted medical leads, it is useful to electrically isolate the electrical contacts on the proxima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61N1/375
CPCA61N1/3752H01R13/5224H01R13/5205A61N1/3754H01R13/521
Inventor S·T·德宁格J·克莱顿T·M·希尔布兰德J·乔治B·王M·T·赫格兰D·A·詹齐格S·P·斯库比茨R·T·斯通D·F·希利S·M·维迪亚
Owner MEDTRONIC INC
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