Ultrasonic guided catheter deployment system

• US 20030233046A1
• Filed: 06/03/2003
• Published: 12/18/2003
• Est. Priority Date: 06/17/2002
• Status: Active Grant

• Current Assignee: Board of Trustees of The University of Arkansas The University of Arkansas
• Original Assignee: The Board of Trustees of the University of Arkansas (University of Arkansas System)
• Inventors: Ferguson, Scott L., Shafirstein, Gal, Waner, Milton
• Granted Patent: US 6,875,179 B2
• Time in Patent Office: Days
• US Class Current: 600/437
• CPC Class Codes: A61B 17/3403 Needle locating or guiding means guides for suture needles A61B17/0482; guiding or tracking by nuclear magnetic resonance G01R33/285
• CPC Class Codes: A61B 2017/3413 guided by ultrasound
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2034/301 for introducing or steering flexible instruments inserted into the body, e.g. catheters or endoscopes
• CPC Class Codes: A61B 2034/742 Joysticks
• CPC Class Codes: A61B 2090/378 using ultrasound
• 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 8/0833 involving detecting or locating foreign bodies or organic structures
• CPC Class Codes: A61B 90/36 Image-producing devices or illumination devices not otherwise provided for

Abstract

A device to guide the placement of the catheter needle more accurately by placing the needle with a mechanical firing mechanism. The device is an integrated handheld unit comprising an ultrasonic probe with a miniature display and a mechanical firing mechanism that holds the catheter needle and deploys it into the target. The device is connected to an external ultrasound machine which provides the imaging for the device. The display provides a graphical user interface to assist in alignment with the target. The depth of placement of the catheter is set by moving a horizontal indicator over the target display using thumb switches on the handle of the device. The thumb switches are connected to a servo motor or the like that adjusts the angle at which the catheter is deployed. The servo motor simultaneously adjusts the distance of the catheter from the skin of the patient to compensate for the change in the length of the path to the target caused by the change in deployment angle. The catheter needle is deployed by a stored energy mechanism. The device may also include sensors to verify accurate placement of the catheter.

Claims

1. A device used in conjunction with an external ultrasound machine providing imaging information to guide the placement of a catheter needle into a targeted anatomical feature, comprising:

an ultrasonic probe and means for operatively connecting said ultrasonic probe to the external ultrasound machine;

receiving means for receiving the imaging information from the external ultrasound machine;

displaying means for displaying the imaging information from the external ultrasound machine;

means associated with said displaying means for graphically indicating a depth to the targeted anatomical feature;

mechanical means for deploying the catheter needle into the anatomical feature; and

means for holding the catheter needle at an angle and distance from the anatomical feature so as to deploy the catheter needle into the anatomical feature at the indicated depth.

2. The device of claim 1 wherein said means for indicating a depth to the targeted anatomical feature comprises an horizontal indicator on said display means and manual means for moving said horizontal indicator to coincide with said depth on said display means.

3. The device of claim 2 wherein said means for holding the catheter further comprises servo-mechanical means for adjusting said angle and distance of the catheter needle in response to said manual means for moving said horizontal indicator.

4. The device of claim 3 wherein said manual means for moving said horizontal indicator comprises at least one thumb switch.

5. The device of claim 4 wherein said mechanical means for deploying the catheter needle comprises a stored energy mechanism.

6. The device of claim 5 wherein said stored energy mechanism comprises a hydraulic mechanism.

7. The device of claim 5 wherein said stored energy mechanism comprises a spring mechanism.

8. The device of claim 1 further comprising means for verifying placement of the catheter into the targeted anatomical feature.

9. The device of claim 8 wherein said means for verifying placement of the catheter comprises a reflector attached to the catheter housing, a light source aimed at said reflector and electro-optic means for detecting the position of the reflector.

10. The device of claim 9 further comprising feedback means for aligning the catheter based on the position detected by said electro-optic means.