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Tracking of catheter from insertion point to heart using impedance measurements

A catheter insertion and electrode technology, applied in the field of catheterization, can solve the problems of undesired and impossible real-time three-dimensional imaging

Inactive Publication Date: 2015-05-27
BIOSENSE WEBSTER (ISRAEL) LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, real-time 3D imaging is not possible or desirable in most cases

Method used

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  • Tracking of catheter from insertion point to heart using impedance measurements
  • Tracking of catheter from insertion point to heart using impedance measurements
  • Tracking of catheter from insertion point to heart using impedance measurements

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[0062] see now Figure 6 , which is a composite schematic diagram of a skeletal model 72 of a subject 74 and a screen display 76 that have been generated according to an embodiment of the present invention. 76 is shown connected to the ACL subsystem. However, the location pads have been omitted for clarity. Hand-held probe 56 has been aligned to a number of anatomical landmarks, namely right costal margin 78 , left costal margin 80 , right anterior iliac spine 82 , left anterior iliac spine 84 , right patella 86 , and left patella 88 . These landmarks correspond to the graphical indications 90, 92, 94, 96, 98, 100 on the display 76, respectively. The landmarks shown are representative; other landmarks may be added as appropriate according to a particular medical protocol. An electrocardiogram trace 102 appears in the lower portion of the display 104 .

[0063] see now Figure 7 , which is a composite illustration of screen display 104 including a skeletal model, according...

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Abstract

A subject-specific skeletal model of a body is created, and an intended path of a catheter within the body is defined in the model. While the probe is inserted into the body electrical currents are passed through the body between at least one electrode in the probe and through respective electroconductive location pads that are disposed at a plurality of locations on the body surface along the intended path. Based on respective characteristics of the currents passing through the plurality of locations, position coordinates of the probe are iteratively determined. The actual path of the probe is tracked with reference to in the model using the iteratively determined position coordinates to determine whether the actual path corresponds to the intended path.

Description

Background technique [0001] technical field [0002] The present invention relates to sensing the position of an object placed inside a living organism. More specifically, the present invention relates to the use of impedance measurements to improve catheter tracking systems. [0003] Background technique [0004] The meanings of certain acronyms and abbreviations used herein are given in Table 1. [0005] Table 1 - Acronyms and Abbreviations [0006] ACLs active current localization EM Electromagnetic MRI Magnetic resonance imaging [0007] Various medical procedures involve the placement of objects such as sensors, tubes, catheters, dispensing devices and implants within the body. Live imaging methods are often used to assist doctors in visualizing the object and its surroundings during these procedures. However, real-time 3D imaging is not possible or desirable in most cases. Instead, systems for obtaining real-time spa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053A61B5/06
CPCA61B5/062A61B5/063A61B5/6852G06T19/003G06T2210/41A61B2560/0223G16H50/50A61B34/20A61B2034/2051A61B5/743A61B5/6801A61B5/7425G01B7/003G01B7/004
Inventor M.巴尔-塔
Owner BIOSENSE WEBSTER (ISRAEL) LTD
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