IMPLANTABLE MEDICAL DEVICE FOR USE WITH OR HAVING RECORDING ELECTRODE
A burr hole device is configured to receive a catheter and a cable of a sheath. The sheath is configured to receive a portion of the catheter and has an electrode. When the catheter and sheath are implanted with the burr hole device, the catheter and electrode of the sheath are implanted in a brain. Systems and apparatuses may include the burr hole device and/or a cranial port device, the catheter, and the sheath.
1 . A burr hole device comprising:
a body having a top surface and a bottom surface and defining a lumen extending from the top surface to the bottom surface,
wherein the lumen is configured to receive a catheter configured to allow fluid to flow to or from a brain of a subject,
wherein at least a portion of the bottom surface is configured to be disposed on a surface of a skull adjacent to a burr hole in the skull of the subject,
wherein the body further defines a top groove along the top surface, wherein the top groove extends from the lumen towards a lateral edge of the top surface of the body, wherein the top groove is configured to receive the catheter,
wherein the body further defines a bottom groove along the bottom surface, wherein the bottom groove extends from a lateral edge of the bottom surface towards the lumen, wherein the bottom groove is configured to receive a cable.
2 . The burr hole device of claim 1 , wherein the body defines an upper flange portion and a lower portion, wherein the lower portion is configured to be placed within the burr hole and the upper flange portion is configured to be disposed on the surface of the skull.
3 . The burr hole device of claim 2 , wherein the bottom groove is disposed on a bottom surface of the upper flange portion.
4 . The burr hole device of claim 3 , wherein the lower portion of the body defines a side groove along a side of the lower portion, wherein the side groove meets with the bottom groove.
5 . The burr hole device of claim 2 , wherein the lower portion of the body is configured to have a clearance of 1 millimeter or less when disposed in the burr hole.
6 . The burr hole device of claim 2 , wherein the lower portion of the body has an outer diametric dimension from 10 millimeters to 20 millimeters.
7 . The burr hole device of claim 2 , wherein the upper flange portion of the body has an outer diametric dimension from 15 millimeters to 30 millimeters.
8 . An assembly comprising:
the burr hole device of claim 1 ;
the catheter; and
a sheath comprising (i) a sheath body defining a sleeve lumen configured to receive the catheter, (ii) a recording electrode disposed on the sheath body, (iii) the cable, and (iv) a conductor electrically coupled to the recording electrode and extending in the cable.
9 . A method comprising:
providing the assembly of claim 8 ;
disposing the burr hole device in or about a burr hole of a subject;
inserting the catheter through the lumen of the burr hole device;
inserting the catheter through the sheath lumen;
implanting a distal end of the catheter in a brain of the subject;
implanting the recording electrode of the sheath beneath the skull of the subject;
inserting the cable of the sheath in the bottom groove, the second top groove, or the bottom portion of the top groove; and
inserting the catheter in the top groove, the first top groove, or the top portion of the top groove.
10 . The method of claim 9 , wherein implanting the recording electrode of the sheath beneath the skull of the subject comprises implanting the electrode in the brain of the subject.
11 . The method of claim 9 , wherein implanting a distal end of the catheter in the brain of the subject comprises implanting the distal end of the catheter in a cerebral ventricle.
12 . An assembly comprising:
the burr hole device of claim 2 ;
the catheter; and
a sheath comprising (i) a sheath body defining a sleeve lumen configured to receive the catheter, (ii) a recording electrode disposed on the sheath body, (iii) the cable, and (iv) a conductor electrically coupled to the recording electrode and extending in the cable.
13 . The method of claim 12 , wherein implanting the recording electrode of the sheath beneath the skull of the subject comprises implanting the electrode in the brain of the subject.
14 . The method of claim 12 , wherein implanting a distal end of the catheter in the brain of the subject comprises implanting the distal end of the catheter in a cerebral ventricle.