SU1657171A1 - Device for osteosynthesis of thighbone neck fractures - Google Patents

Description

one

(21) 4405697/14

(22) 04/06/88

(46) 06.23.91. Bul №23

(75) O.M. Makishev

(53) 615.475.616.71-001.54) 89.84 (088.8)

(56) USSR Copyright Certificate No. 1569000. 1989.

(54) DEVICE FOR OSTEOSYNTHESIS OF Fractures of the neck of the hip

(57) The invention relates to medical technology. To prevent bias

When the device is inserted at the proximal threaded end 2, the proximal fragment is located at the end of the sleeve 3 with the external thread 4. The threaded end 2 of the rod and the external thread 4 of the sleeve 3 have a conical shape and differently directed threads of the same pitch, which allows rotating the sleeve 3 and the rod in opposite directions balance the torsional moments. 5 il.

The invention relates to medical technology, namely, devices for carrying out osteosynthesis, and can be used in traumatology for the treatment of patients with injuries of the femoral neck.

The purpose of the invention is to prevent displacement of the proximal fragment upon insertion of the device.

Figure 1 shows the device, a general view; figure 2 - sleeve; on fig.Z - rod; figure 4 is a view of And figure 1; figure 5 - the device in the collection, mounted on the bone.

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The device for osteosynthesis of hip fractures consists of a rod 1 with a proximal threaded end 2 and a sleeve 3 mounted on it with an external thread 4 at the end. The threads of the rod 1 and the sleeve 3 are made in different directions. The threaded end 2 and the end of the sleeve 3 with an external thread 4 have a conical shape and the same thread pitch. On the tail end, the rod 1 has a metric thread 5 and a square prismatic end 6 under

key. The sleeve 3 is made with a tapered shank 7, which has a slot 8.

To ensure compression between the fragments on the tail of the rod 1, a figurnal washer 9, a gasket 10 and a nut 11 are installed.

The device is used as follows.

After reposition of the fragments, a canal of the under femur bone area is drilled through the femoral neck and fracture line 12 into the head 13. The rod 1 and the sleeve 3 are inserted into the canal. On the square prismatic end 6 of the rod 1 in the slot 8 of the sleeve 3 install the keys. Then, the sleeve 3 and the rod 1 are simultaneously screwed in the directions corresponding to the external thread 4 of the sleeve 3 and the thread of the rod 1. At the same time, the keys of the rod and the sleeve simultaneously rotate in opposite directions. Due to the fact that the core and sleeve sections have an equal thread pitch, the sleeve 3 and the rod 1 together are inserted into the bone tissue. The resulting torsional moments are balanced.

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about ate

prevents hip head movement.

After the tapered shank 7 is wedged in the inlet of the drilled channel, a figure washer 9, a gasket 10 are installed and the nut 11 is tightened, which ensures a constant compression of the bone fragments. Formula of the invention. A device for osteosynthesis of hip fractures, containing a rod with

FIG A

Compiled by L. Antoshina Editor O. Yurkovetska Tehred M. Morgenta Proofreader V. Girn to

Order 1672 Circulation 434Subscription

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk emb. 4/5

threaded proximal end, mounted on it a sleeve with an external thread on the end and a locking element, while the threads of the rod and the sleeve are made differently directed with the same pitch, which means that, in order to prevent displacement of the proximal fragment when inserting the device, the threaded end of the sleeve located at the proximal end of the rod, and the threaded ends of the rod and sleeve are tapered.

7

1

Figz

Claims (1)

Claim A device for osteosynthesis of femoral neck fractures, comprising a rod with a threaded proximal end, a sleeve installed on it with an external thread at the end and a locking element, while the threads of the rod sleeve are made in different directions with the same pitch, as long as that, in order to prevent displacements of the proximal fragment when the device is introduced, the threaded end of the sleeve is located at the proximal end of the rod, and the threaded ends of the rod and sleeve are made conical. Fig! Figure 2 Compiled by L. Antoshin Editor O. Yurkovetskaya Tehred M. Morgen Tal Corrector V. Girnyak .............. X Order 1672 Circulation 434 Subscription VNIIIPI of the State Committee for Inventions and Discoveries under the State Committee for Science and Technology of the USSR 113035, Moscow, Zh-35, Raushskaya nab., 4/5 Production and Publishing Combine Patent, Uzhgorod, 101 Gagarin St.