Stereotactic device for implantation of permanent implants into a rodent brain

• US 9,707,049 B1
• Filed: 12/22/2016
• Issued: 07/18/2017
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: The Florida International University Board of Trustees (State University System of Florida)
• Original Assignee: The Florida International University Board of Trustees (State University System of Florida), Regents of the University of California (University of California)
• Inventors: Allen, Timothy, McNaughton, Bruce, Su, Meifung, Allen, Leila Mangan
• Primary Examiner(s): Weisberg, Amy R
• Application Number:
  US15/387,843
• Time in Patent Office: 208 Days
• Field of Search: 90 14
• CPC Class Codes: A61B 17/1695 Trepans or craniotomes, i.e. specially adapted for drilling thin bones such as the skull
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 2090/103 Cranial plugs for access to brain
• CPC Class Codes: A61B 2090/363 Use of fiducial points
• CPC Class Codes: A61B 2503/40 Animals
• CPC Class Codes: A61B 90/11 with guides for needles or instruments, e.g. arcuate slides or ball joints
• CPC Class Codes: A61B 90/14 Fixators for body parts, e.g. skull clamps; Constructional details of fixators, e.g. pins
• CPC Class Codes: A61B 90/361 Image-producing devices, e.g. surgical cameras

Abstract

Stereotactic systems and implantation methods that can be designed for use with a specific species and further customized for use with an individual within the species are provided. The stereotactic system can include an implant jig that can model a tissue or organ in which a target tissue area is located. A neurocap can be coupled to the implant jig for pre-planning and pre-placement of implants. A stencil can be used to determine the location for placement of the neurocap on the individual, so that the implants can be precisely targeted at the desired location. Pre-surgical information and data can be obtained from an individual and used to customize components of a stereotactic system, which can improve accuracy of implant placement.

Claims

1. A method for inserting an implant into the brain of a specific species, the method comprising:

obtaining at least one image of an operating area on a skull of a subject of the specific species;

obtaining at least one image of a tissue corresponding to the operating area for receiving at least one implant;

customizing a stereotactic system, which is adapted for placing implants in the specific species, the system comprising;

an implant jig comprising;

a support plate;

at least one post extending from the support plate; and

one or more margin plates affixed to the at least one post, each margin plate comprising a proximal side, a distal side, and a first interface surface on a distal side, the first interface surface at least partially modeling at least one first physiological characteristic of the operating area of the specific species and the margin plate being affixed to the at least one post in a location that models at least one second physiological characteristic of the specific species different from the first physiological characteristic;

a neurocap, adapted to be affixed to the operating area of the specific species and comprising;

an interface plate with a proximal side having a second interface surface that at least partially models the same at least one physiological characteristic of an operating area as that modeled by the first interface surface of the one or more margin plates, such that the second interface surface couples with the first interface surface;

at least one port that corresponds with a location in the operating area at which an implant is to be inserted into the specific species; and

at least one bore that corresponds with a location in the operating area at which a connector attaches the neurocap to the operating area; and

a stencil, adapted to be temporarily placed against the operating area of the specific species, comprising a proximal side with a third interface surface that at least partially models the same at least one first physiological characteristic as the second interface surface,

the customizing of the stereotactic system comprising utilizing the at least one image of the operating area to customize the placement of the at least one port and to customize at least one of the first interface surface, the second interface surface, and the third interface surface to have at least one third physiological characteristic corresponding to the at least one first physiological characteristic of the operating area, and utilizing the at least one image of the tissue to further customize the at least one port and to customize a volume of the implant jig to be the same or similar to that of at least one fourth physiological characteristic of the tissue to receive the at least one implant;

utilizing the stencil of the stereotactic system to align with one or more landmarks on the skull and mark points for attachment of the neurocap and other points for the insertion of the at least one implant through the operating area;

utilizing the neurocap and implant jig to pre-determine the placement of the at least one implant through the at least one port in the neurocap into the volume of the implant jig;

recording a position of the at least one implant and retracting the at least one implant into the neurocap;

creating one or more burr holes in the operating area at the points marked using the stencil;

removing the neurocap from the implant jig and affixing the neurocap to the operating area using at least one of the burr holes; and

inserting the at least one implant into the tissue through the at least one port and the at least one burr hole utilizing the recorded position.

2. The method according to claim 1, further comprising permanently affixing an exposed end of the at least one implant in the at least one port such that the position of the at least one implant in the tissue is secured.

3. The method according to claim 2, further comprising utilizing an adhesive to further attach the neurocap and to affix the exposed end of the at least one implant in the neurocap.

4. The method according to claim 2, wherein customizing the first interface surface comprises making a positive mold of an operating surface on the first interface surface, and wherein customizing the second interface surface and the third interface surface comprises making a negative mold of the operating surface on the second interface surface and the third interface surface.

5. The method according to claim 2, further comprising affixing a protective cap to the neurocap to cover the exposed end of the at least one implant.