Medical instrument set and method of use for treating bony aberrations of the calcaneus

Patent metadata

Field	Value
Publication number	US-10123810-B2
Application number	US-201615249420-A
Country	US
Kind code	B2
Filing date	Aug 28, 2016
Priority date	Sep 2, 2015
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

A medical instrument set and method of use for surgically treating bony aberrations of the calcaneus such as calcaneal compression fractures. The present medical instrument set allows surgical treatment of bony aberrations through a minimally invasive procedure that provides better outcomes than both a closed reduction and an open reduction procedure. The medical instrument set includes one or more of an access needle, drill, depth guide, cement plunger, and curette. The access needle is used to provide access to a desired calcaneal site and is characterized by a cannula and a removable trocar tip. The drill is used to bore into the calcaneus. The depth guide is used to visually indicate how far a medical instrument extends beyond and/or through the access needle cannula. The cement plunger is used to introduce bone cement into the desired calcaneal site. The curette is used to mechanically create a void at the desired calcaneal site.

First claim

What is claimed is:

1. A method of treating bony aberrations of the calcaneus comprising the steps of:
providing a set of medical instruments for treating bony aberrations of the calcaneus, the set of medical instruments comprising:
a cannula;
a trocar;
a drill;
a depth guide;
a cement plunger; and
a curette;

using the cannula and trocar to reach a bony aberration;
using the drill with the cannula to prepare the bony aberration;
using the curette and depth guide with the cannula to remove material relating to the bony aberration to create a void; and
using the cement plunger with the cannula to implant cement into the void.

2. The method of claim 1 , wherein the cannula comprises:
an ergonomic handle having a center section with a bore extending from a first end of the center section to a second end of the center section;
a tube extending from the second end of the ergonomic handle and in communication with the bore; and
an externally threaded boss at the first end of the ergonomic handle and in communication with the bore.

3. The method of claim 2 , wherein the trocar comprises:
an elongated needle having a first end and a second end;
a trocar tip at the second end of the elongated needle; and
a knob at the first end of the elongated needle, the knob having internal threading that corresponds with the external threading of the boss.

4. The method of claim 1 , wherein the drill comprises:
a handle;
an elongated rod having a first end in the handle, and a second end distal the handle, the elongated rod defining a working length; and
drill threading at the second end of the elongated rod, the drill threading defining a drill length.

5. The method of claim 4 , wherein the drill length is congruent with the working length.

6. The method of claim 1 , wherein the depth guide comprises:
a first generally tubular body having a distal end and a proximal end and a bore extending from the distal end to the proximal end, a head disposed at the proximal end of the first generally tubular body, and an elongated opening disposed along a portion of the first generally tubular body, the elongated opening providing communication with the bore; and
a second generally tubular body having a distal portion and a proximal portion, and a bore extending from the distal portion to the proximal portion, a nub on the proximal portion and providing a stop against the head of the first generally tubular body, the distal portion extending into the bore of the first generally tubular body so as to be visible from exterior of the first generally tubular body via the elongated opening of the first generally tubular body.

7. The method of claim 6 , wherein a marker is provided on the distal portion extending into the bore of the first generally tubular body, the marker providing a visual demarcation.

8. The method of claim 1 , wherein the cement plunger comprises:
a first handle;
a hollow rod extending from the first handle, the hollow rod having a first end situated in the first handle, and a second end distal the first handle, access to the hollow of the rod via the first handle;
a second handle; and
a solid rod extending from the second handle and having an end distal to the second handle that is adapted to eject cement from the hollow rod.

9. The method of claim 8 , wherein the second handle is configured as a knob.

10. The method of claim 1 , wherein the curette comprises:
a handle;
a rod extending from the handle and having an end distal to the handle; and
a blade disposed on the end distal to the handle.

11. The method of claim 10 , wherein the blade is curved from the end distal to the handle.

12. The method of claim 11 , wherein the rod and blade define a working length.

13. The method of claim 1 , wherein the step of providing a set of medical instruments for treating bony aberrations of the calcaneus comprises using a set of medical instruments comprising:
a cannula, the cannula having:
an ergonomic handle with a center section with a bore extending from a first end of the center section to a second end of the center section;
a tube extending from the second end of the ergonomic handle and in communication with the bore; and
an externally threaded boss at the first end of the ergonomic handle and in communication with the bore;

a trocar, the trocar having:
an elongated needle having a first end and a second end;
a trocar tip at the second end of the elongated needle; and
a knob at the first end of the elongated needle, the knob having internal threading that corresponds with the external threading of the boss;

a drill, the drill having:
a handle;
an elongated rod having a first end in the handle, and a second end distal the handle, the elongated rod defining a working length; and
drill threading at the second end of the elongated rod, the drill threading defining a drill length;

a depth guide, the depth guide having:
a first generally tubular body having a distal end and a proximal end and a bore extending from the distal end to the proximal end, a head disposed at the proximal end of the first generally tubular body, and an elongated opening disposed along a portion of the first generally tubular body, the elongated opening providing communication with the bore; and
a second generally tubular body having a distal portion and a proximal portion, and a bore extending from the distal portion to the proximal portion, a nub on the proximal portion and providing a stop against the head of the first generally tubular body, the distal portion extending into the bore of the first generally tubular body so as to be visible from exterior of the first generally tubular body via the elongated opening of the first generally tubular body;

a cement plunger, the cement plunger having:
a first handle;
a hollow rod extending from the first handle, the hollow rod having a first end situated in the first handle, and a second end distal the first handle, access to the hollow of the rod via the first handle;

a second handle; and
a solid rod extending from the second handle and having an end distal to the second handle that is adapted to eject cement from the hollow rod; and

a curette, the curette having:
a handle;
a rod extending from the handle and having an end distal to the handle; and
a blade disposed on the end distal to the handle.

14. The method of claim 13 , wherein the drill length is congruent with the working length.

15. The method of claim 13 , wherein a marker is provided on the distal portion extending into the bore of the first generally tubular body, the marker providing a visual demarcation.

16. The method of claim 13 , wherein the second handle is configured as a knob.

17. The method of claim 13 , wherein the blade is curved from the end distal to the handle.

18. The method of claim 17 , wherein the rod and blade define a working length.

Assignees

• Life Spine Inc

Inventors

• Wolters Madeline C
• Butler Michael S

Classifications

• A61B17/1604

  Chisels; Rongeurs; Punches; Stamps · CPC title

• A61B17/1739

  specially adapted for particular parts of the body · CPC title

• A61B17/1682 Primary

  for the foot or ankle · CPC title

• A61B17/3472

  for bones, e.g. intraosseus injections · CPC title

• A61B17/8822

  characterised by means facilitating expulsion of fluid from the introducer, e.g. a screw pump plunger, hydraulic force transmissions, application of vibrations or a vacuum · CPC title