Arm angle indicator
First Claim
1. An arm angle measurement device for determining the version angle of the humeral head during shoulder surgery when the forearm is externally rotated with the elbow flexed to 90°
- comprising;
a first element for contacting the forearm having a first coupling element aligned with the ulna;
a second element for contacting the upper arm, said second element having a second coupling element aligned with to the humerus, said second coupling element pivotally coupled to said first coupling element for rotation about a pivot point; and
an angle indicator having angle indicia located at said pivot point and fixed to one of said first or second elements for indicating the external rotation angle between said first and second coupling elements.
1 Assignment
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Accused Products
Abstract
An angle measurement device is provided for determining the version angle for the prosthetic humeral head during shoulder replacement surgery. The device has a first collar for contacting the forearm and has a first coupling element in the form of a rod aligned with the ulna. The device has a second collar for contacting the upper arm when the elbow is flexed to 90°. The second collar has a second coupling element coupled thereto extending in a direction generally perpendicular to the humerus. The second coupling element is pivotally coupled to the first coupling element for rotation about a pivot point axis. An angle indicator having angle indicia is located at said pivot point and fixed to one of said first or second arm contacting collars for indicating the angle between the ulna and the humerus during external rotation of the forearm.
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Citations
22 Claims
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1. An arm angle measurement device for determining the version angle of the humeral head during shoulder surgery when the forearm is externally rotated with the elbow flexed to 90°
- comprising;
a first element for contacting the forearm having a first coupling element aligned with the ulna;
a second element for contacting the upper arm, said second element having a second coupling element aligned with to the humerus, said second coupling element pivotally coupled to said first coupling element for rotation about a pivot point; and
an angle indicator having angle indicia located at said pivot point and fixed to one of said first or second elements for indicating the external rotation angle between said first and second coupling elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- comprising;
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12. An angle indicator for displaying the external rotation angle between a 90°
- flexed forearm and upper arm with respect to the sagittal plane comprising;
a first collar shaped to receive the forearm;
a second collar shaped to receive the upper arm pivotally coupled to said first collar at a pivot point;
a dial adjacent said pivot point having angle indicia thereon for displaying the angle between said first and second collars about said pivot point; and
means for locking said first and second collars at a selected angle. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- flexed forearm and upper arm with respect to the sagittal plane comprising;
Specification