ASPIRATING CUTTER AND METHOD TO USE

• US 20190038460A1
• Filed: 03/20/2015
• Published: 02/07/2019
• Est. Priority Date: 03/20/2014
• Status: Active Grant

• Current Assignee: Medical Instrument Development Laboratories, Inc.
• Original Assignee: Medical Instrument Development Laboratories, Inc.
• Inventors: Peterson, Erik William
• Granted Patent: US 11,241,333 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 2217/005 with suction drainage system
• CPC Class Codes: A61F 2009/0087 Lens
• CPC Class Codes: A61F 2009/00874 Vitreous
• CPC Class Codes: A61F 2009/00887 Cataract
• CPC Class Codes: A61F 9/00709 Instruments for removing foreign bodies for removal of intra-ocular material A61F9/00736
• CPC Class Codes: A61F 9/00763 with rotating or reciprocating cutting elements, e.g. concentric cutting needles atherectomy cutting instruments A61B17/3207; endoscopic cutting instruments A61B17/320016
• CPC Class Codes: A61F 9/00825 for photodisruption

Abstract

An ophthalmic surgical cutting apparatus for cutting biological material including a handle, an outer tube attached to the handle and having a closed tip, a port formed in a side wall of the outer tube with a cusp formed by two or more intersecting surfaces, and an inner tube slidable within the outer tube and having a longitudinal axis and an open tip. The inner tube is in fluid communication with the handle, and the cusp of the port and the open tip interface during a cutting motion to fracture and cut biological materials and direct cut materials radially inward into the port.

Claims

1. An ophthalmic A surgical cutting apparatus for cutting biological material, the apparatus comprising:

a handle;

an outer tube attached to the handle and having a closed tip;

a port formed in a side wall of the outer tube, the port including an edge; and

an inner tube slidable within the outer tube and having a longitudinal axis and an open tip, the inner tube being in fluid communication with the handle,

wherein at least one of the outer tube port edge and the inner tube open tip is formed with a cusp.

2. The surgical cutting apparatus of claim 1, wherein the surgical cutting apparatus is pneumatically-powered.

3. The surgical cutting apparatus of claim 1, wherein the open tip of the inner tube is formed with an angled feature, and wherein the angled feature of the inner tube is formed by an angled surface, the angled surface being non-perpendicular with the longitudinal axis of the inner tube.

8. The surgical cutting apparatus of claim 1, wherein the edge of the port is formed with an angled feature, and wherein the angled feature of the port is formed as an undercut lip with an angled surface, the angled surface being non-perpendicular with the longitudinal axis of the inner tube.

4-7. -7. (canceled)

9-10. -10. (canceled)

11. A surgical cutting apparatus for cutting biological material, the apparatus comprising:

a handle;

an outer tube attached to the handle and having an open tip;

an inner tube slidable within the outer tube and having a closed tip, the inner tube being in fluid communication with the handle; and

a port formed in a side wall of the inner tube, the port including an edge,

wherein the edge of the port and the open tip interface to fracture and cut biological materials, and

wherein the inner tube is extendable beyond the outer tube.

12. The surgical cutting apparatus of claim 11, wherein the surgical cutting apparatus is pneumatically-powered.

14. The surgical cutting apparatus of claim 11, wherein the edge of the port is formed with an angled feature, wherein the angled feature of the port and the open tip interface during a cutting motion in which the inner tube is moved toward the open tip, and wherein the angled feature of the port is formed as an undercut with an angled surface, the angled surface being non-perpendicular with a longitudinal axis of the inner tube.

15. The surgical cutting apparatus of claim 11, wherein the edge of the port is formed with an angled feature, wherein the angled feature of the port and the open tip interface during a cutting motion in which the inner tube is moved toward the open tip, and wherein the angled feature of the port is a cusp formed by two or more intersecting surfaces.

17. The surgical cutting apparatus of claim 11, wherein the open tip of the outer tube is formed with an angled feature, wherein the edge of the port and the angled feature of the open tip interface during a cutting motion in which the inner tube is moved toward the open tip, and wherein the angled feature of the open tip is formed by an angled surface, the angled surface being non-perpendicular with a longitudinal axis of the inner tube.

18. The surgical cutting apparatus of claim 11, wherein the open tip of the outer tube is formed with an angled feature, wherein the edge of the port and the angled feature of the open tip interface during a cutting motion in which the inner tube is moved toward the open tip, and wherein the angled feature of the open tip is a cusp formed by two or more intersecting surfaces.

13. (canceled)

16. (canceled)

19. A surgical cutting apparatus for cutting biological material, the apparatus comprising:

a handle;

an outer tube attached to the handle and having a closed tip;

a first port formed in a side wall of the outer tube, the port including a cusp formed by two or more intersecting surfaces;

an inner tube slidable within the outer tube and having a longitudinal axis and an open tip, the inner tube being in fluid communication with the handle; and

a second port formed in a side wall of the inner tube,

wherein the cusp of the first port and the open tip of the inner tube interface during a cutting motion to fracture and cut biological materials and direct cut materials radially inward into the first port,

wherein the first and second ports overlap when the inner tube is in an extended position within the outer tube, and

wherein an edge of the first port further from the closed tip than the cusp is configured to interface with an edge of the second port to fracture and cut biological materials.

20. The surgical cutting apparatus of claim 19, wherein the surgical cutting apparatus is pneumatically-powered.

24. The surgical cutting apparatus of claim 19, wherein first port includes an angled feature further from the closed tip than the cusp, wherein the angled feature of the first port is formed as an undercut lip with by an angled surface, the angled surface being non-perpendicular with the longitudinal axis of the inner tube.

25. The surgical cutting apparatus of claim 19, wherein first port includes an angled feature further from the closed tip than the cusp, wherein the angled feature of the first port is a second cusp formed by two or more intersecting surfaces.

21-23. -23. (canceled)

26. A method of operating a surgical cutting apparatus, the surgical cutting apparatus including a handle, an outer tube with a closed tip, an inner tube with an open tip, a first port formed in a side wall of the outer tube, and a second port formed in a side wall of the inner tube, the method comprising:

operating the surgical cutting apparatus in a first mode of operation, the first mode of operation including

positioning the inner tube in an extended position, and

aspirating biological tissue through the first and second ports;

operating the surgical cutting apparatus in a second mode of operation, the second mode of operation including

positioning the inner tube in the extended position,

aspirating biological tissue through the first and second ports,

actuating the inner tube to move from the extended position to a retracted position when the biological material is occluding the second port, and

returning the inner tube to the extended position; and

operating the surgical cutting apparatus in a third mode of operation, the third mode of operating including

positioning the inner tube in the retracted position,

aspirating biological tissue through the first port,

actuating the inner tube to move from the retracted position to the extended position when biological tissue is occluding the first port, and

returning the inner tube to the retracted position.

27-30. -30. (canceled)