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Systems and methods for detecting magnetic markers for surgical guidance

A detection system and marker technology, applied in the field of surgical guidance

Active Publication Date: 2019-08-02
ENDOMAGNETICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in surgical guidance using a hand-held probe, the varying response depending on the direction of approach would confuse the user, as markers would appear at different distances from the probe depending on the direction of approach

Method used

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  • Systems and methods for detecting magnetic markers for surgical guidance
  • Systems and methods for detecting magnetic markers for surgical guidance
  • Systems and methods for detecting magnetic markers for surgical guidance

Examples

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Embodiment Construction

[0062] The present invention relates to a magnetic marker that can be implanted to mark a target site in the body and subsequently detected and localized using a hand-held probe. The present invention provides a detection system and method for locating the position of an implanted marker in the body.

[0063] Markers can be implanted in the body where markers are desired. For example, this could be a tumor or other lesion or a site of interest in soft tissue. Examples include, but are not limited to, benign lesions, cancerous lesions, and lymph nodes. A marker may be placed in or near the lesion, or multiple markers may be placed to mark the margin or perimeter of the surgical site, such as the margin of a soft tissue sarcoma.

[0064] The detection systems and methods of the present invention take advantage of different excitation modes of LBJ materials, which have not heretofore been identified. The inventors have surprisingly found that even when the length of the wire i...

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Abstract

A detection system and method uses an implantable magnetic marker comprising at least one piece of a large Barkhausen jump material (LBJ). The marker is deployed to mark a tissue site in the body forsubsequent surgery, and the magnetic detection system includes a handheld probe to excite the marker below the switching field for bistable switching of the marker causing a harmonic response to be generated in a sub-bistable mode that allows the marker to be detected and localised. The marker implanted may also be shorter than the critical length required to initiate bistable switching of the LBJmaterial.

Description

[0001] field of invention [0002] The present invention relates generally to the field of surgical guidance, and more particularly to systems and methods for detecting markers that facilitate localization of body parts, eg, lesions for surgical resection. Background technique [0003] The markers are used during surgery to guide the surgeon to an area of ​​interest that is not physically visible or palpable, such as a small tumor that needs to be resected. Ideally, such markers can be deployed with a narrow gauge needle, eg, 18g to 14g, to reduce trauma to the patient. Typically, such markers are less than 5mm in length to be inconspicuous and to minimize trauma. Markers can be placed on a site of interest in the body, such as a cancerous lesion, during a biopsy or other surgical procedure. Place markers under imaging guidance, such as ultrasound or X-ray / mammography. During subsequent surgery, the markers are detected and localized using a hand-held probe that provides au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/06A61B90/00
CPCA61B5/062A61B2017/00867A61B2017/00876A61B34/20A61B2034/2051A61B2090/3954A61B2090/397A61B2090/3987A61B2090/3908A61B5/064A61B2505/05A61B90/39A61B2090/3925A61B2090/3966A61N5/1049G01R33/1215A61B2090/3958A61B2090/3995A61N2005/1051A61B2090/3904A61B10/00A61B2562/0223G01D5/20
Inventor 蒂齐亚诺·阿格斯蒂里凯文·洛里默昆汀·约翰·哈默
Owner ENDOMAGNETICS LTD