Open field system for magnetic surgery

a magnetic surgery and open-field technology, applied in the field of magnetic surgery system, can solve the problems of inability to perform surgery with the most skilled surgeons, difficult and time-consuming for physicians, and failure to achieve magnetically assisted surgery attempts, etc., to achieve effective magnetic guidance, high-quality images, and sufficient strength

Inactive Publication Date: 2012-12-27
RITTER ROGERS C +6
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014]To increase the flexibility of the system, there is preferably an opening in the housing, aligned with one of the coils, through which a portion of the patient's body can extend to bring another portion of the patient's body into the system's operating region. The system can include a patient support for supporting and for moving the patient relative to the operating region of the system.
[0016]The imaging devices are mounted on a movable support, independently of the magnet coils. The support allows the imaging devices to be moved about three axes, and may be, for example a conventional C-arm support. This allows the imaging devices to be moved relative to the operating region, to provide the surgeon the most advantageous view of the procedure. The three axes of movement of the imaging devices preferably intersect, and more preferably they intersect in the operating region, and most preferably they intersect at the same point where the axes of the magnets coils intersect. This provides the greatest flexibility of imaging in the operating region.
[0018]In the preferred embodiment, a total of three super conducting magnets coils are configured so that each of their central axes lies generally along an axis of an orthogonal coordinate system having its origin approximately centered within the operating region. The magnets are supported by a generally hemispherical housing and each magnet is of sufficient strength to provide a magnetic field in the direction of its respective central axis having a generally consistent strength of about 0.3 Tesla throughout substantially the entirety of the operating region. A control adjusts the strength of the magnetic field of each of said magnet coils to thereby controllably navigate the magnetic medical device within that part of a patient within the operating region.
[0023]Thus the system of the present invention provides for effective magnetic guidance of magnetic medical devices within the body for performing medical procedures. The system is capable of providing magnetic fields of sufficient strength for orientation and even movement of magnetic medical devices, within a sufficiently large operating region to allow practical medical procedures to be completed with magnetic assistance. However, the magnets are arranged so that the operating region of the system can be positioned in any portion of the body. The system provides open access so that imaging plates can be interposed between the patient and the magnets to provide high-quality images of the operating region. The imaging apparatus can be moved independently of the magnets to provide the best possible views of the operating region.

Problems solved by technology

While these procedures are highly beneficial to the patient, they are difficult and time consuming for the physician.
Some procedures can only be performed by the most skilled surgeons.
For various reasons these previous attempts at magnetically assisted surgery have not proven to be successful, nor are they widely used.
One reason has been the inability of the previous systems to adequately guide the probes within the vessels, partly for mechanical and hydrodynamic reasons, partly from the lack of adequate computer and control technology, and partly because of an inability to provide adequate real time imaging for the procedures.
Even now, accessibility of adequate imaging in the presence of the large magnets needed to move small magnetic guiding “seeds” on medical devices is difficult.
While magnetically guided surgery with such systems is practical, the sheer bulk and size of their magnetic systems results in less accessibility of the operating region of the patient than a surgeon might prefer.
This relative immobility tends to reduce the ability of the surgeons to see the medical operating device in the patient, making the operation somewhat more difficult for the surgeon and somewhat riskier for the patient than might otherwise be the case.
Another difficulty with using magnetic systems for these purposes is that the conventional fluoroscopes cannot be used in magnetic fields of any significant magnitude.

Method used

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  • Open field system for magnetic surgery
  • Open field system for magnetic surgery
  • Open field system for magnetic surgery

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first embodiment

The First Embodiment

[0083]A first embodiment of an inventive open field magnetic surgical system constructed according to the principles of this invention is indicated generally as 50 in FIG. 1. The system 50 comprises a patient support 52, a magnet assembly 54 on a moveable magnet support 56, and an imaging assembly 58.

[0084]The patient support 52 preferably comprises an elongate bed 60 mounted on a pedestal 62. The foot of bed 60 is oriented toward the front of system and the head of the bed is oriented toward the rear of the system. The head of the bed 60 is narrower than foot of the bed so that it can fit inside the magnet assembly 54 and accommodate the imaging devices of the imaging assembly 58. The bed 60 is preferably movable with respect to the pedestal 62, to allow the patient to be moved relative to the magnet assembly 54. The bed 60 can preferably be moved longitudinally forwardly and rearwardly and vertically upwardly and downwardly, and it can be rotated about its long...

second embodiment

The Second Embodiment

[0116]A second embodiment of an inventive open field magnetic surgical system constructed according to the principles of this invention is indicated generally as 200 in FIGS. 13-24. The system 200 is similar in construction to the system 50, and comprises a patient support 202, a magnet assembly 204 on a moveable magnet support 206, and an imaging assembly 208.

[0117]The patient support 202 preferably comprises an elongate bed 210 mounted on a pedestal 212. The foot of the bed 210 is oriented toward the front of the system and the head of the bed is oriented toward the rear of the system. The head of the bed 210 is narrower than the foot of the bed so that it can fit inside the magnet assembly 204 and accommodate the imaging devices of the imaging assembly 208. The bed 210, is preferably moveable with respect to the pedestal 212 to allow the patient to be moved relative to the magnet assembly. The bed can be moved into and out of the system; raised and lowered, a...

third embodiment

The Third Embodiment

[0125]A third embodiment of an inventive open field magnetic surgery system constructed according to the principles of this invention is indicated generally as 300 in FIGS. 34-36. The system 300 is similar in construction to systems 50 and 200, and comprises a patient support 302, a magnet assembly 304 on a moveable magnet support 306, and an imaging assembly 308.

[0126]The patient support 302 preferably comprises an elongate bed 310 mounted on a pedestal 312. The foot of the bed 310 is oriented toward the front of the system and the head of the bed is oriented toward the rear of the system. The head of the bed 310 is narrower than the foot of the bed so that it can fit inside the magnet assembly 304 and accommodate the imaging devices of the imaging assembly 308. The bed 310, is preferably moveable with respect to the pedestal 312 to allow the patient to be moved relative to the magnet assembly. The bed can be moved into and out of the system; raised and lowered,...

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Abstract

A system of navigating a magnetic medical device within that part of a patient located within an operating region of the system, the system comprising magnets, and preferably electromagnets, arranged to provide a magnetic field sufficient to navigate the magnetic medical device within the operating region. There are preferably three magnetic coils arranged in mutually perpendicular planes such that their axes intersect in the operating region. The magnetic coils are sized and arranged so that a patient can easily access the operating region to allow virtually any portion of the patient to be positioned within the operating region. The openness of the magnetic system allows access to the operating region by a bi-planer imaging system.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This Application is a divisional application of U.S. patent application Ser. No. 09 / 211,723, filed Dec. 14, 1998, (incorporated herein by reference), which claims priority of Provisional Patent Application Ser. No. 60 / 107,144 filed Nov. 3, 1998, (incorporated herein by reference).FIELD OF THE INVENTION[0002]This invention relates to a magnetic surgery system, and in particular to an open magnetic surgery system that provides greater access to the patient for imaging and other purposes.BACKGROUND OF THE INVENTION[0003]A wide variety of minimally invasive surgical procedures have been developed which employ catheters, endoscopes, or other similar devices that can be navigated remotely from their distal ends. The catheter, endoscope or other medical device is manipulated through the tissue or through an existing body lumen or cavity using a guide wire or other mechanical means. Examples of such procedures include the treatment of aneurysms, a...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): A61N2/02A61N2/10A61B1/00A61B5/055G01N24/00A61B6/00A61B6/02A61B6/04A61B6/12A61B19/00A61M25/01G01R33/3815G01R33/48
CPCA61B6/0457A61B6/4441A61B2019/2265A61B2019/2253A61B19/22A61B34/73A61B2034/733A61B34/70A61B6/0487
InventorRITTER, ROGERS C.GARIBALDI, JEFFREY M.WOLFERSBERGER, CHARLESCREIGHTON, FRANCIS M.WERP, PETER R.HOGG, BEVIL J.BLUME, WALTER M.
OwnerRITTER ROGERS C