Bone dilator system

• US 20050137607A1
• Filed: 10/22/2004
• Published: 06/23/2005
• Est. Priority Date: 10/23/2003
• Status: Abandoned Application

• Current Assignee: TranS1 Incorporated (Baxano Surgical, Inc.)
• Original Assignee: TranS1 Incorporated (Baxano Surgical, Inc.)
• Inventors: Assell, Robert L., Cragg, Andrew H., Ainsworth, Stephen D., Dickhudt, Eugene A.
• Application Number:
  US10/972,299
• Publication Number:
  US 20050137607A1
• Time in Patent Office: Days
• US Class Current: 606/100
• CPC Class Codes: A61B 17/0218 for minimally invasive surgery A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence
• CPC Class Codes: A61B 17/025 Joint distractors
• CPC Class Codes: A61B 17/1604 Chisels; Rongeurs; Punches; Stamps
• CPC Class Codes: A61B 17/1615 Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 17/1697 specially adapted for wire insertion
• CPC Class Codes: A61B 17/1757 for the spine
• CPC Class Codes: A61B 17/7074 Tools specially adapted for spinal fixation operations other than for bone removal or filler handling A61B17/7062, A61B17/808, A61B17/8858 take precedence; for spinal image producing devices A61B90/36, A61B34/20; markers A61B90/39
• CPC Class Codes: A61B 17/8615 at the central region of the screw head
• CPC Class Codes: A61B 17/888 the driver bit acting on the central region of the screw head
• CPC Class Codes: A61B 17/8888 at its central region
• CPC Class Codes: A61B 17/8897 Guide wires or guide pins
• CPC Class Codes: A61B 2017/00261 Discectomy
• CPC Class Codes: A61B 2017/0046 with a releasable handle; with handle and operating part separable for prosthetic joint-implanting tools A61F2/4603
• CPC Class Codes: A61B 2017/00469 for insertion of instruments, e.g. guide wire, optical fibre
• CPC Class Codes: A61B 2017/0256 for the spine
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22044 with a pointed tip
• CPC Class Codes: A61B 2017/3445 used as instrument channel for multiple instruments catheters A61B2017/22072
• CPC Class Codes: A61B 2017/922 Devices for impaction, impact element

Abstract

Disclosed are surgical tools, tool sets and methods for percutaneously accessing and preparing treatment sites within the spine for subsequent treatment procedures. The treatment site may be an inter-vertebral motion segments in the lumbar and sacral regions of the spine. The tool set may comprise introducer tools and bone dilators for accessing and tapping into a targeted site, such as, for example, the anterior surface of the S1 vertebral body. The tool set may also comprise cutters and extractors for preparing the treatment site for subsequent treatment procedures. The tool set may additionally comprise a bone graft inserter, an exchange system, and/or a temporary distraction tool for further preparing the treatment site for subsequent treatment procedures.

Claims

1. A bone dilator system, for enlarging the diameter of a bore through bone, comprising:

a first cannulated rod, having a proximal end and a distal end;

a handle on the proximal end; and

a cannulated slap hammer, for reciprocal movement over a guide pin extending through the cannulated rod and slap hammer.

2. A bone dilator system as in claim 1, further comprising a guide pin.

3. A bone dilator system as in claim 1, further comprising a tapered tip on the distal end.

4. A bone dilator system as in claim 1, further comprising at least a second cannulated rod, having a greater diameter than the first cannulated rod.

5. A bone dilator system as in claim 4, further comprising at least a third cannulated rod, having a greater diameter than the second cannulated rod.

6. A bone dilator system as in claim 4, further comprising a tubular sheath, wherein at least one cannulated rod is removably positionable within the tubular sheath.

7. A bone dilator system as in claim 6, further comprising a first retention structure on the sheath and a second, complementary retention structure on the cannulated rod, to releasably attach the sheath to the rod.

8. A bone dilator kit, for increasing the diameter of a bore through bone, comprising:

a first cannulated rod having a proximal handle and a first diameter;

a second cannulated rod having a proximal handle and a second diameter;

a third cannulated rod having a proximal handle and a third diameter.

9. A bone dilator kit as in claim 8, further comprising a slap hammer.

10. A bone dilator kit as in claim 8, wherein at least one of the first, second and third diameters is about 6 mm.

11. A bone dilator kit as in claim 8, wherein at least one of the first, second and third diameters is about 8 mm.

12. A bone dilator kit as in claim 8, wherein at least one of the first, second and third diameters is about 10 mm.

13. A bone dilator kit as in claim 8, further comprising a tubular sheath having a central lumen dimensioned to axially slidably receive at least one of the cannulated rods.

14. A bone dilator kit as in claim 13, further comprising a lock for releasably retaining the sheath on the at least one rod.

15. A method of enlarging a bore in bone, comprising the steps of:

advancing a first tubular dilator, having a first diameter, over a guide pin and into the bone;

removing the first tubular dilator; and

advancing at least a second tubular dilator, having a second, greater diameter, over the guide pin and into the bone.

16. A method of enlarging a bore in bone as in claim 15, wherein at least one of the advancing steps is accomplished using a cannulated slap hammer.

17. A method of enlarging a bore in bone as in claim 15, further comprising advancing a third tubular dilator over the guide pin and into the bone.

18. A method of positioning a tubular access sheath in communication with a site in a bone, comprising the steps of:

advancing a first tubular dilator, having a first diameter, over a guide pin and into the bone;

removing the first tubular dilator;

advancing at least a second tubular dilator, having a second, greater diameter and a removable tubular sheath, over the guide pin and into the bone; and

removing the second tubular dilator, leaving the tubular sheath in position to provide access to the site in the bone.