US3727611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alignment means for inserting guide wire prior to inserting hip nail for a fractured hip
Assignee: Individual
•
Filing: 1971-07-01
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Granted: 1973-04-17
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Expires: 1991-07-01
Abstract
Abstract The alignment means includes three novel structures for correctly placing a hip nail in the rounded head of the femur for fracture of the hip. In the use of these structures, a new method of inserting a guide wire in a bone is disclosed. One of the aids is a specially prepared side plate attached to the movable arm of a modified Lowman clamp which is used to designate the correct position for drilling an entrance hole in the lateral cortex of the femur to accommodate the nail and guide wire. Another aid is a wire guide which directs the exploratory wire across the fractured area. The guide wire is used to direct the nail to its best supporting position, and the third is the use of the lesser trochanter as the reference point for the attachment or contact of the instrument, so that the instrument may be used and the procedure performed.
Inventors
- 👤 R Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:13
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/17; A61B17/1721; A61B17/1703; A61B90/00; A61B90/39
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
140 words
An alignment means for inserting a metal guide wire into the head and neck of the femur comprising: a clamp including a first jaw for limiting against the lesser trochanter having a spacial relationship with the angle formed by the junction of the neck and shaft, and a second jaw slideably secured to said first jaw for securing the clamp to a portion of the bone, said second jaw fitted with an alignment hole indicating a starting position for a nail; the hole limiting motion in the anterior position (frontal) plane but allowing for motion in the lateral (sagittal) position a guiding wire, for insertion into the alignment hole into the bone and across the fracture at a predetermined angle and position, said guide wire forming a pilot means for inserting the nail after the wire guide has been removed.
Claim 2
Dependent Claim
140 words
An alignment means for inserting a metal guide wire into the head and neck of the femur comprising: a clamp including a first jaw for limiting against the lesser trochanter having a spacial relationship with the angle formed by the junction of the neck and shaft, and a second jaw slideably secured to said first jaw for securing the clamp to a portion of the bone, said second jaw fitted with an alignment hole indicating a starting position for a nail; the hole limiting motion in the anterior position (frontal) plane but allowing for motion in the lateral (sagittal) position a guiding wire, for insertion into the alignment hole into the bone and across the fracture at a predetermined angle and position, said guide wire forming a pilot means for inserting the nail after the wire guide has been removed.
Claim 3
Dependent Claim
41 words
An alignment means as claimed in claim 1 wherein two alignment holes are formed in the second jaw for indicating starting positions for either one of two nails, said nails having differing angles between the nail flange and the insertion portion.
Claim 4
Dependent Claim
29 words
An alignment means as claimed in claim 2 wherein one alignment hole is for a wire guide and nail having an angular separation between nail and flange of 135*.
Claim 5
Dependent Claim
30 words
An alignment means as claimed in claim 2 wherein a second alignment hole is for a wire guide and nail having an angular separation between nail and flange of 150*.
Claim 6
Dependent Claim
107 words
An alignment means for inserting a metal nail into the head and neck of the femur comprising: a clamp including a first jaw for limiting against the lesser trochanter, a second jaw for securing the clamp to a portion of the bone; and a rockable cylinder supported in a cylindrical recess in said second jaw, said cylinder formed with an alignment hole; a guide wire for insertion through said hole into the bone to thereby indicate a starting position and an angular direction in all planes across the fracture, said guide wire forming a pilot means for inserting the metal nail after the clamp has been removed.
Claim 7
Dependent Claim
107 words
An alignment means for inserting a metal nail into the head and neck of the femur comprising: a clamp including a first jaw for limiting against the lesser trochanter, a second jaw for securing the clamp to a portion of the bone; and a rockable cylinder supported in a cylindrical recess in said second jaw, said cylinder formed with an alignment hole; a guide wire for insertion through said hole into the bone to thereby indicate a starting position and an angular direction in all planes across the fracture, said guide wire forming a pilot means for inserting the metal nail after the clamp has been removed.
Claim 8
Dependent Claim
36 words
An alignment means as claimed in claim 5 wherein said rockable cylinder is formed with two holes for supporting either one of two guide wires, said two holes disposed at differing angles to the bone axis.
Claim 9
Dependent Claim
32 words
An alignment means as claimed in claim 6 wherein the holes for supporting the guide wires are disposed at angles of 135* and 150* respectively from the axis of the bone shaft.
Claim 10
Dependent Claim
27 words
An alignment means as claimed in claim 5 wherein a hollow cylindrical wire guide is supported in said rockable cylinder for actually accurately guiding the guide wire.
Claim 11
Dependent Claim
40 words
An alignment means as claimed in claim 5 wherein said rockable cylinder is removable and reversible for changing the angular disposition of the guide wire when the clamp is secured to a femur on the other side of the body.
Claim 12
Dependent Claim
39 words
An alignment means as claimed in claim 5 wherein said rockable cylinder is secured in position by means of a set screw which limits movement by means of an annular groove cut in the outer surface of the cylinder.
Claim 13
Independent Claim
139 words
The method of aligning a metal nail for insertion into a femur bone for fixation of a malformation such as a fracture or slipped femoral capital epiphysis of the femur comprising: securing a clamp to a portion of the femur shaft with one of the edges of the clamp in engagement with the lesser trochanter; drilling a hole in the bone cortex at a point indicated by a hole in the clamp; inserting a hollow cylindrical wire guide into the hole positioned at a predetermined angle to the bone shaft and permitting accommodation for anteversion, neutral or retroversion of the neck or head; inserting a guide wire into the hollow portion of the wire guide; removing the wire guide and the clamp from the bone; inserting a hollow nail over the guide wire; and then removing the guide wire.
Claim 14
Independent Claim
139 words
The method of aligning a metal nail for insertion into a femur bone for fixation of a malformation such as a fracture or slipped femoral capital epiphysis of the femur comprising: securing a clamp to a portion of the femur shaft with one of the edges of the clamp in engagement with the lesser trochanter; drilling a hole in the bone cortex at a point indicated by a hole in the clamp; inserting a hollow cylindrical wire guide into the hole positioned at a predetermined angle to the bone shaft and permitting accommodation for anteversion, neutral or retroversion of the neck or head; inserting a guide wire into the hollow portion of the wire guide; removing the wire guide and the clamp from the bone; inserting a hollow nail over the guide wire; and then removing the guide wire.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |