CATHETER LOCATOR APPARATUS AND METHOD OF USE

• US 20130218006A1
• Filed: 04/05/2013
• Published: 08/22/2013
• Est. Priority Date: 08/23/2000
• Status: Active Grant

• Current Assignee: Avent Incorporated (Avanos Medical, Inc.)
• Original Assignee: CORPAK MedSystems, Inc. (Avanos Medical, Inc.)
• Inventors: Besz, William John, Chorley, Donald Philip, Brasted, Stuart, Walker, Robert Anthony
• Granted Patent: US 9,585,599 B2
• Time in Patent Office: Days
• US Class Current: 600/424
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/2051 Electromagnetic tracking systems
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 2090/3983 Reference marker arrangements for use with image guided surgery
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 5/061 Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body A61B1/00158 takes precedence
• CPC Class Codes: A61B 5/062 using magnetic field
• CPC Class Codes: A61B 5/065 Determining position of the probe employing exclusively positioning means located on or in the probe, e.g. using position sensors arranged on the probe
• CPC Class Codes: A61B 5/6851 Guide wires
• CPC Class Codes: A61B 5/6852 Catheters
• CPC Class Codes: A61B 5/742 using visual displays A61B5/339 takes precedence
• CPC Class Codes: A61B 5/743 Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots
• CPC Class Codes: A61B 90/36 Image-producing devices or illumination devices not otherwise provided for
• CPC Class Codes: A61J 15/0007 inserted by using a guide-wire guide wires A61M25/09
• CPC Class Codes: A61J 15/0069 Tubes feeding directly to the intestines, e.g. to the jejunum
• CPC Class Codes: A61M 2025/0166 Sensors, electrodes or the like for guiding the catheter to a target zone, e.g. image guided or magnetically guided
• CPC Class Codes: A61M 25/0105 Steering means as part of the catheter or advancing means; Markers for positioning systems for detection of markers A61B
• CPC Class Codes: A61M 25/09 Guide wires

Abstract

This invention relates to a method of catheter and radiating coil location in a human body and in particular to the determination over time of the location of the tip of a catheter as it is inserted and during its use in the body. In particular when a radiating coil is used in conjunction with a catheter, a coil locating device can be used to determine the distance the coil is from the device and hence its depth in the body of a patient. To assist a clinician using the coil-locating device, a display is provided that shows both a reference image of a part or portion of a body (non-subject body) and an image of the coil located on the display with reference to the reference image. This is achieved by locating the coil-locating device on or over a predetermined landmark on the patient'"'"'s body. The coil and its associated signal wires can be incorporated into a stylet, guide wire or a catheter. The coil locating device has a preferable triangular shape in plan view that allows its uppermost apex to be orientated towards the head of the patient and for an axis of the device to be aligned with the mid sagittal plane of the patient. Preferable landmarks on a human body include the xiphoid sternal junction and the caudal/mid sagittal aspect of the jugular sternal notch.

Claims

1. A method of locating a coil used in relation to a catheter to be inserted into a subject body wherein the coil radiates signal energy, the method comprising:

using a coil detector device having at least two coil detectors wherein the coil detector device is located with reference to a predetermined location on the subject body and is configured to generate a signal based on a spatial separation of a the radiating coil from the coil detector device; and

displaying a predetermined symbol representative of a portion of a non-subject body wherein the signal generated by the coil detector device is used to display a predetermined coil symbol representative of the radiating coil at a position on a display device relative to the predetermined symbol for use by a clinician to guide a positioning of the radiating coil and the catheter into the subject body.

2. The method according to claim 1, wherein the coil detector device is located with reference to a predetermined location being on or over the caudal/mid sagittal aspect of the jugular sternal notch of a human body for use with a venous access catheter inserted into the cardiovascular system.

3. The method according to claim 2, wherein the predetermined symbol representative of the portion of the non-subject body is representative of the sternum of a non-subject human body, which delineates a portion of the upper skeleton of a human body on the display device.

4. The method according to claim 1, further comprising:

displaying the predetermined coil symbol representative of the radiating coil at predetermined intervals of time.

5. The method according to claim 1, wherein the radiating coil is incorporated into a stylet or guide wire adapted for use with the catheter.

6. The method according to claim 5, further comprising:

displaying the predetermined coil symbol representative of the radiating coil at predetermined intervals of time while the stylet or guide wire is retracted from the catheter located over the stylet or guide wire such that the path of the radiating coil in the catheter can be tracked and displayed.

7. The method according to claim 6, wherein the tracked path is constructed for display by calculating a line of best fit from a plurality of signals generated by the coil detector device.

8. The method according to claim 1, wherein a radiating coil is incorporated into the catheter for use in a body.

11. The method according to claim 1, wherein the coil detector device has an external shape adapted for placement on a predetermined location of the subject body.

12. The method according to claim 11, wherein the external shape of the coil detector device is adapted for placement over a bony landmark of the subject body.

13. The method according to claim 11, wherein the external shape has a longitudinal axis.

14. The method according to claim 13, wherein the coil detector device has a line marked or engraved along the longitudinal axis for assisting visual alignment with the subject body.

15. The method according to claim 1, wherein a position change of the catheter is displayed by a position change of the predetermined coil symbol.

16. The method according to claim 15, wherein the predetermined coil symbol is an arrow.

17. The method according to claim 16, wherein the arrow is successively displayed in different colors.

18. The method according to claim 16, wherein the position change is controllable according to a predetermined change in the data indicative of position changes.

19. The method according to claim 1, wherein the predetermined symbol representative of the portion of the non-subject body is at least one of a line, a curve, and an object.

20. The method according to claim 1, further comprising:

displaying the depth of the radiating coil.

21. The method according to claim 1, wherein the catheter is one of a central venous catheter and a peripherally inserted central catheter.

9. The method according to claim 9, further comprising:

displaying the predetermined coil symbol representative of the radiating coil at predetermined intervals of time while the catheter is inserted into or retracted from the body such that the catheter can be tracked and displayed.

10. The method according to claim 10, wherein the tracked path is constructed for display by calculating a line of best fit from a plurality of signals generated by the coil detector device.