SHOULDER MODEL FOR SHOULDER ARTHROSCOPY

• US 20080114460A1
• Filed: 11/05/2007
• Published: 05/15/2008
• Est. Priority Date: 11/07/2006
• Status: Active Grant

• Current Assignee: Arthrex Incorporated
• Original Assignee: Arthrex Incorporated
• Inventors: Wyman, Jeffrey, Willobee, James A.
• Granted Patent: US 7,780,451 B2
• Time in Patent Office: Days
• US Class Current: 623/19.13
• CPC Class Codes: G09B 23/285 for injections, endoscopy, bronchoscopy, sigmoidscopy, insertion of contraceptive devices or enemas
• CPC Class Codes: G09B 23/32 with moving parts

Abstract

A shoulder model and methods of shoulder arthroscopy using the shoulder model. The shoulder model includes an acromioclavicular (AC) joint assembly, a joint capsule assembly, a scapula mount, a shoulder musculature, a skin, and a base. The AC joint assembly is mounted on the scapula mount and the joint assembly is attached to the AC joint assembly and fastened using a screw/nut to form the shoulder assembly. The shoulder assembly is placed in the shoulder musculature and the skin is rolled over the shoulder musculature and zipped in place. The bones of the shoulder assembly are made of foam-cortical shell, the shoulder musculature is made of foam, the soft tissue components are made of thermoplastic elastomers, and the skin is made of vinyl. A method of practicing shoulder arthroscopy using the shoulder model includes mounting the shoulder model in a beach chair position, making anatomical references, establishing a posterior viewing portal, inserting cannulas into the glenohumeral joint or the subacromial space, creating a labral disruption or a rotator cuff tear, and repairing the rotator cuff tear or labral disruption.

Claims

1. A shoulder model for experimental procedures, comprising:

a shoulder assembly, the shoulder assembly comprising;

a joint capsule assembly;

a scapula and mounting post;

an acromioclavicular (AC) joint assembly, the AC joint assembly, the joint capsule assembly and the scapula and mounting post being secured together, wherein bones of the AC joint assembly, the joint capsule assembly and the scapula are formed of a material comprising foam-cortical shell;

a labrum glenoid assembly;

a shoulder musculature, the shoulder musculature having a hollow inside capable of accommodating the shoulder assembly, and formed of a material comprising foam; and

a skin forming a tight seal around the shoulder musculature.

2. The shoulder model of claim 1, further comprising a base, the base being attached to the scapula and mounting post, and the base being made of a polymer material.

3. The shoulder model of claim 1, wherein the skin is formed of a vinyl material.

4. The shoulder model of claim 1, wherein the labrum glenoid assembly is formed of a material comprising thermoplastic elastomers.

5. A method of performing an experimental arthroscopic procedure on a simulated rotator cuff, comprising:

mounting a shoulder model on a mount and securing the shoulder model to the mount, the shoulder model comprising;

a shoulder assembly, the shoulder assembly comprising;

a joint capsule assembly;

a scapula and mounting post;

an acromioclavicular (AC) joint assembly, the AC joint assembly, the joint capsule assembly and the scapula and mounting post being secured together, wherein bones of the AC joint assembly, the joint capsule assembly and the scapula are formed of a material comprising foam-cortical shell;

a labrum glenoid assembly;

a shoulder musculature, the shoulder musculature having a hollow inside capable of accommodating the shoulder assembly, and formed of a material comprising foam; and

a skin forming a tight seal around the shoulder musculature;

making anatomical references on the shoulder model;

establishing a viewing portal in a posterior side of the shoulder model;

creating at least one additional portal and inserting a cannula in the additional portal, the additional portal being used to pass arthroscopic instruments; and

creating a rotator cuff tear using arthroscopic scissors; and

repairing the rotator cuff tear.

6. The method of claim 5, wherein the mount is a flat surface and the step of mounting the shoulder model comprises mounting the shoulder model in a beach chair position by securing a base of the shoulder model to the flat surface.

7. The method of claim 5, wherein the step of mounting the shoulder model comprises mounting the shoulder model in a lateral decubitus position.

8. The method of claim 5, wherein the step of making anatomical references comprises outlining borders of acromion, distal clavicle, and acromioclavicular joint using a marker;

marking coracoid process, and marking a “

V”

at a medial border of the acromion midpoint between the acromioclavicular joint and scapular spine.

9. The method of claim 5, wherein the step of establishing a viewing portal comprises making an incision about 2 cm posterior and about 1 cm inferior to posterior border of acromion.

10. The method of claim 9, wherein the incision is about 1 cm and has a depth of about 2 cm.

11. The method of claim 8, further comprising inserting a scope sheath and obturator in a superior direction until the obturator touches an underside of the acromion;

removing the obturator; and

inserting an arthroscope into the sheath.

12. The method of claim 8, further comprising inserting a trocar into a glenohumeral joint;

removing the trocar;

inserting an arthroscope and sheath anteromedial across the glenohumeral joint toward the coracoid.

13. The method of claim 5, wherein the step of creating an additional portal comprises:

placing a needle into a glenohumeral joint from a point just off an anterior corner of acromion and the needle entering the glenohumeral joint behind biceps tendon about 1-2 cm lateral to glenoid;

making a stab incision of about 3-4 mm through the skin and shoulder musculature of the shoulder model and into a capsule, and removing the needle and incision instrument; and

inserting a cannula.

14. The method of claim 5, wherein the step of creating an additional portal comprises:

placing a needle into a glenohumeral joint from a point near and just lateral to coracoid process and the needle entering the glenohumeral joint at a superior edge of subscap tendon about 2-3 cm lateral to a cannula formed behind biceps tendon about 1-2 cm lateral to glenoid;

making a stab incision of about 3-4 mm through the skin and shoulder musculature of the shoulder model and into a capsule using an incision instrument, and removing the needle and incision instrument; and

inserting a cannula in an usual progression of the needle, the cannula having a diameter of about 8.25 mm.

15. The method of claim 5, wherein the step of repairing the rotator cuff tear comprises:

viewing the rotator cuff through the viewing portal;

removing fragmented portions of tendon; and

passing sutures through tendon ends using an arthroscopic stitch passer and grasper, and tying the sutures using an arthroscopic knot tying instrument.

16. The method of claim 5, wherein the step of repairing the rotator cuff tear comprises:

viewing the rotator cuff through the viewing portal;

removing fragmented portions of tendon; and

securing the tendon with a suture anchor.