Access System

• US 20080071215A1
• Filed: 11/04/2005
• Published: 03/20/2008
• Est. Priority Date: 11/05/2004
• Status: Active Grant

• Current Assignee: Philips Electronics Limited (Koninklijke Philips N.V.), The United States of America As Represented by the Secretary of the Government, United States Secretary of Health and Human Services is the head of the United States Department of Health and Human Services
• Original Assignee: American Health Companies Incorporated, Traxtal Technologies, Inc.
• Inventors: Woods, Bradford, Glossop, Neil
• Granted Patent: US 7,722,565 B2
• Time in Patent Office: Days
• US Class Current: 604/116
• CPC Class Codes: A61B 10/0233 Pointed or sharp biopsy instruments
• 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 2017/3411 with a plurality of holes, e.g. holes in matrix arrangement
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

Systems and methods for providing access to a target site. Example systems can include a needle and a grid to guide the needle. One system includes a plate with an aperture, a member coupled to the plate and including a semispherical surface, and a hub slideably coupled to the plate by a guide. The system can also include a lock mechanism configured to lock the hub relative to the plate on the guide, and a needle coupled to the hub, the needle including a magnetically trackable sensor positioned in a tip of the needle. The semispherical surface of the member can be positioned against skin of a body and the hub slid relative to the plate along the guide to insert the needle through the aperture in the plate into the body until the tip reaches a target site. The hub can be locked by the lock mechanism when the tip of the needle reaches the target site, and an ablation agent is delivered to the target site through the needle, or a tissue sample is obtained.

Claims

1. An access system for a device, comprising:

a member including a semispherical surface defining an aperture;

a hub defining an aperture and being slideably coupled to the member by a guide;

a lock mechanism configured to lock the hub relative to the member on the guide;

a removable probe that is inserted through the hub and the member; and

a magnetically trackable sensor;

wherein the member is positioned against a surface; and

wherein the hub is slid relative to the plate along the guide until the sensor indicates that the probe is positioned at a target site.

2. The system of claim 1, wherein the sensor is coupled to one of the hub, a needle coupled to the hub, and the probe.

3. The system of claim 2, wherein the probe includes a stop that limits a distance that the probe can be inserted through the hub.

4. The system of claim 3, wherein the stop is formed by increasing a diameter of the probe such that, when the increased diameter is positioned adjacent to the aperture of the hub, the probe cannot be inserted further through the aperture of the hub.

5. The system of claim 1, wherein the probe is one of a single or multi-lumen probe.

6. The system of claim 1, wherein the probe is one of a group consisting of a radio frequency ablation probe, a microwave probe, a biopsy needle, a brachytherapy needle, a cryogenic probe, an ultrasound probe, an optical coherence tomography probe, a laser probe, an electrode, and a hollow cannula.

7. The system of claim 1, wherein the semispherical surface of the member allows the system to be rotated or pivoted about the surface.

8. The system of claim 1, wherein the guide includes at least one rod.

9. An access system for an ablation device, comprising:

a plate defining an aperture;

a member coupled to the plate and defining a semispherical surface;

a hub slideably coupled to the plate by a rod;

a lock mechanism configured to lock the hub relative to the plate on the rod; and

a needle coupled to the hub, the needle including a magnetically trackable coil positioned in a tip of the needle;

wherein the semispherical surface of the member is positioned against skin of a body, wherein the hub is slid relative to the plate along the rod to insert the needle through the aperture in the plate into the body until the tip reaches a target site, wherein the hub is locked by the lock mechanism when the tip of the needle reaches the target site, and wherein an ablation agent is delivered to the target site through the needle, or a tissue sample is obtained.

10. The system of claim 9, wherein the hub and the plate each define a set of apertures, wherein a probe including a plurality of needles is inserted through the apertures of the hub and plate to positions adjacent the target site, and wherein the ablation agent is delivered to the positions adjacent the target site using one or more of the plurality of needles of the probe.

11. The system of claim 9, wherein the plate and hub each define a plurality of sets of apertures.

12. The system of claim 9, further comprising a cannula surrounding the needle, wherein the needle is removed upon reaching the target site and a needle of a probe is inserted through the cannula to the target site to deliver the ablation agent to the target site.

13. A method of providing access to a target site in a body, the method comprising:

positioning a button including a semispherical surface against the body;

sliding a hub relative to a stabilizing plate to introduce a needle into the body;

magnetically tracking a tip of the needle as it moves through the body;

locking the hub relative to the stabilizing plate when the needle reaches the target site; and

introducing an ablation agent to the target site through the needle, or obtaining a tissue sample at the target site.

14. The method of claim 13, further comprising introducing a probe including a plurality of needles through the hub and stabilizing plate and into the body adjacent to the target site.

15. The method of claim 13, further comprising:

imaging an area surrounding the target site in three dimensions;

overlaying the imaging onto a magnetically tracked space; and

using the imaging overlaid on the magnetically tracked space to track the tip of the needle as the needle is introduced into the body towards the target site.

16. The method of claim 13, further comprising rotating or pivoting the semispherical surface of the button against the body to a desired position.

17. The method of claim 13, further comprising:

removing the needle upon reaching the target site, a cannula surrounding the needle being left in place;

inserting a probe is inserted through the cannula to the target site to deliver the ablation agent to the target site.

18. The method of claim 13, wherein the needle is a single or multi-lumen probe.

19. The method of claim 13, wherein the needle is one from a group consisting of a radio frequency ablation probe, a microwave probe, a biopsy needle, a brachytherapy needle, a cryogenic probe, an ultrasound probe, an optical coherence tomography probe, a laser probe, an electrode, and a hollow cannula.

20. The method of claim 13, wherein the needle is a single or multi-lumen radio frequency ablation probe.