IMAGE GUIDED WHOLE BODY STEREOTACTIC NEEDLE PLACEMENT DEVICE WITH FALLING ARC.

• US 20110190787A1
• Filed: 10/22/2007
• Published: 08/04/2011
• Est. Priority Date: 10/23/2006
• Status: Active Grant

• Current Assignee: Hirdesh Sahni
• Original Assignee: Hirdesh Sahni
• Inventors: Sahni, Hirdesh
• Granted Patent: US 9,125,676 B2
• Time in Patent Office: Days
• US Class Current: 606/130
• CPC Class Codes: A61B 2017/3407 including a base for support on the body
• CPC Class Codes: A61B 2034/107 Visualisation of planned trajectories or target regions
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 2090/374 NMR or MRI
• CPC Class Codes: A61B 2090/376 using X-rays, e.g. fluoroscopy
• CPC Class Codes: A61B 2090/3954 magnetic, e.g. NMR or MRI
• CPC Class Codes: A61B 2090/3966 Radiopaque markers visible in an X-ray image
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints

Abstract

The present invention provides an Image guided whole body stereotactic needle placement device with falling arc (3), comprising a circular base plate (1), a circular supporting ring (2) that is placed in the groove (8) in base plate (1) for supporting ring 2), a carrying arc (3) for needle guide (6) which has a foot (23) on either side, a fixing screw (4) which fixes the carrying arc (3) for the needle guide (6) with the supporting ring (2) and the base plate (1), a locking pin (29) which fixes the carrying arc (3) for needle guide (6) with the supporting ring (2) making the carrying arc (3) for the needle guide (6) perpendicular to the base plate (1) and a needle guide (6) that slides on the superior surface of the carrying arc (3) for the needle. This device is both CT and MR compatible, and can be used for precisely positioning a needle tip at a particular point inside the body. The needle can be used for taking tissue samples/delivering drugs/delivering energy to ablate tissues/aspirating cystic lesions. The patient has to hold breath while the needle is being passed into regions that move on respiration. This device has a falling arc that allows quick release of the needle after placement, so as to quickly allow free breathing for the patient. This feature allows utilisation of this device in chest and abdomen also. The device can be placed on the skin or on the exposed organ during surgery. The device is light weight, small and can be used in patients of any age.

Claims

1. An image guided whole body stereotactic needle placement device with falling arc, comprising:

a circular base plate comprising radial markings in degrees on the top surface, a circular groove and an outer and an inner set of rings for securing the base plate to the patient, the bottom surface of the base comprises six fiducial markers, in sets of two, one of these two being magnetic resonance imaging visible and the other being computerized tomography visible, the markers in each set are along the radius, at 120 degrees from the adjoining sets at 0 degrees, 120 degrees and the at 240 degrees radial marked on the top surface of the base plate;

a circular supporting ring being placed in the groove of the base plate, the supporting ring comprises two end to end tapped holes that are diametrically opposite to each other, which allow stem of a fixing screw to get fixed in the groove on the base plate and another hole for stem of a locking pin;

a carrying arc for needle guide, being fitted to the circular supporting ring, the carrying arc comprises an arc blade and a foot on either side, the carrying arc comprises a superior surface that is concentric with the fiducial markers, the arc blade has radial markings in degrees on its front surface, the feet of the carrying arc have a linear mark on upper surface, the feet have hole one on each side for the stem of fixing screw, the right foot of the carrying arc has an oblique hole for the stem of locking pin;

the Fixing Screw having a grip and a stem, the fixing screw fixes the supporting ring and the carrying arc for needle guide to the base plate at a desired radial marking in degrees on the top surface of the base plate,

the locking pin for fixing the carrying arc with supporting ring making the carrying arc perpendicular to the base plate, the locking pin comprises a grip and a stem, the stem of locking pin passes through the hole in foot arc and the tapped hole in supporting ring;

a needle guide being able to slide over the superior surface of the carrying arc, the needle guide comprises a head, a front plate and a back plate, the head has an inferior surface that is concentric to the superior surface of the arc blade, the front plate has a window through which the radial markings in degrees on the front surface of the arc blade are visible, there is a wedge shaped needle track on the front plate of the needle guide, the back plate of needle guide has a tapped hole for a screw to fix needle guide to the arc blade.