RU110959U1 - DEVICE FOR TUNNELIZATION OF THE SUBCHONDRAL BONE - Google Patents

Abstract

The utility model relates to medicine, namely to traumatology and orthopedics.

The purpose of the utility model: Creating a design that allows you to drill the subchondral bone without causing injury to the soft tissues of the joint, under the control of the depth of insertion of the instrument.

The purpose of the utility model: The introduction of the Kirschner needle into the bone at a given depth. A device for abrasive chondroplasty and tunneling contains a cannula with a handle. Inside the cannula is a knitting needle with tags. The distance between the marks is 1 mm, the length of the marks is 4 cm.

The technical result of the proposed utility model: Improving the blood supply to the subchondral bone and creating the conditions for filling the defect in the articular cartilage with regenerate.

Description

The utility model relates to medicine, namely to traumatology and orthopedics.

Analog 1. Through osteoperforation is carried out using a drill with a diameter of 6 mm and using a spoke, in addition, a spoke is made in the frontal plane through the subchondral osteoperforation of the patella with at least three tunnels through mutually oblique directions (V. Makushin; OK; Chegurov; Kazantsev V.I .; Kamshilov B.V. A method for the treatment of deforming arthrosis of the knee joint.Patent of the Russian Federation No. 2193363, according to the application No. 2000126047/14 of 16.10.2000; Date of publication: 11.27.2002).

Analog 2. A patient using a knitting needle in the metadiaphyseal sections of the bones that form the ulnar joint, through skin punctures form at least three channels on the humerus and ulnar bones - in the frontal plane, on the radial - in the oblique-sagittal front-back and outside-inside. (Makushin V.D .; Soldatov Yu.P .; Kazantsev V.I .; Chegurov OK Method for the treatment of deforming arthrosis of the elbow joint. (Patent No. 2150909 according to application No. 97109755/14 dated 06/10/1997; Class: A61B 17/56; Publication date 06/20/2000).

Analog 3: Known Universal conductor for knitting needles and drills (Oster V.R. Universal conductor for knitting needles and drills // V.R. Oster / Orthopedics, traumatology and prosthetics. - 1976. - No. 5. - P.64-65) . The jig contains a bracket with heads in which coaxial threaded holes are drilled. The heads are provided with lower slots. Coaxial threaded bushings are screwed into the holes of the heads: guide and receiving. There is a set of bushings with longitudinal axial channels for spokes and drills of various diameters. Each sleeve has a knurled head at one end, and a groove for a U-shaped pin at the other (outer diameter). When holding knitting needles, the bracket with the sleeves covers the limb, while the end of each sleeve corresponds to the point of insertion of the spoke, and the end of the other (receiving) to the point of exit. After holding the spokes, the bushings are turned out, and the bracket is removed from the spokes through the slots in the heads. When drilling bones with detached soft tissues (for example, through both tibia bones in the syndesmosis region), tips with spikes and holes for the studs are put on the free ends of the bushings. The spikes are pressed into the bone and firmly fix the jig, regardless of whether the oblique or transverse channel is supposed to be drilled.

Criticism of analogues:

1. The needle is used in open form, which does not protect paraarticular tissue from damage during rotation of the tool;

2. The spoke does not have a graduation, which creates certain difficulties in determining the depth of its penetration into the bone;

3. The universal conductor for knitting needles and drills is massive and not intended for insertion into the joint cavity;

4. The needles are not additionally supported by the handle or cannula, which increases the invasiveness of the procedure, as the inevitable vibration and “play” during rotation will cause damage to adjacent bone sections and an unplanned opening of the hole.

Prototype: We took the device as a prototype (Dr. med. Sciences, professor, academician of the National Academy of Sciences of Belarus E.D. Beloenko, Dr. med. Sciences O. L. Eismont. The technology of surgical treatment of isolated injuries of the cartilage of the knee joint ( instructions for use) Institution developed by the State Institution “Belarusian Research Institute of Traumatology and Orthopedics Minsk 2007).

Kirchner needle (1.5-2 mm in diameter) or a thin drill (2.5-3.5 mm in diameter) is used to drill the subchondral bone until hemorrhages appear in it. Protection when drilling surrounding periarticular tissues is done using a special cannula

The disadvantages of the prototype:

1. The spoke does not have a graduation, which creates certain difficulties in determining the depth of its penetration into the bone;

2. The needle is not covered by a body that would protect soft tissue during its rotation.

The purpose of the utility model: Creating a design that allows you to drill the subchondral bone without causing injury to the soft tissues of the joint, under the control of the depth of insertion of the instrument.

The essence of the proposed utility model: The device proposed as a utility model is depicted in figure 1 and figure 2, where

- Cannula (figure 1, position 1)

- pen (Fig. 1, item 2)

- knitting needle (figure 1, position 3; figure 2, position 3)

- calibration marks (figure 1, position 4; figure 2, position 4).

A device for tunneling the subchondral bone contains a cannula (figure 1, position 1) with a handle (figure 1, position 2). Inside the cannula is a spoke (figure 1, position 3; figure 2, position 3) with calibration marks (figure 1, position 4; figure 2, position 4). The distance between the calibration marks is 1 mm., The length of the calibration marks is 4 cm.

Features of utility model distinctive from prototype

“The Kirschner needle is all inside the cannula.” The needle is passed through the soft tissue in a closed form. The length of the Kirschner needle corresponds to the length of the cannula, which eliminates vibration and “play” during rotation and does not damage adjacent sections of the bone. When the needle is in the cannula, this protects the paraarticular tissue from damage when the tool rotates. According to the prototype, the device is used in open form.

- The Kirschner spoke is labeled, which makes it easier to determine the depth of its penetration into the bone. The presence of calibration marks does not allow injuring paraarticular tissue during the introduction of the instrument. In the prototype device there are no calibration marks on the spoke.

- The cannula is equipped with a handle, but the known device does not have a handle.

An example of a specific implementation: The proposed device for tunneling the subchondral bone is used as follows: First, the spoke is fixed in the electric drill (Fig. 1, Pos. 3; Fig. 2, Pos. 3) from the side of the labels (Fig. 1, Pos. 4; Fig. 2, item 4). Then, the sharp end of the spoke is inserted into the cannula (Fig. 1, pos. 1), holding it by the handle (Fig. 1, pos. 2). The free end of the cannula is inserted into the joint cavity and attached to the damaged area of the bone. It is drilled, the depth of which is controlled by calibration marks on the spoke. After the completion of the manipulation, the tool is removed from the joint and disconnected from the drill.

The technical result of the proposed utility model: Improving the blood supply to the subchondral bone and creating the conditions for filling the defect in the articular cartilage with regenerate. The needle is in the cannula, this protects the paraarticular tissue from damage during rotation of the tool. Using the proposed device eliminates vibration and "backlash" during rotation and does not damage adjacent areas of the bone.

Information taken into account:

- Makushin V.D .; Chegurov O.K .; Kazantsev V.I .; Kamshilov B.V. A method for the treatment of deforming arthrosis of the knee joint. (RF patent No. 2193363, by application No.2000126047 / 14 dated 10.16.2000; Date of publication: 11.27.2002);

- Makushin V.D .; Soldatov Yu.P .; Kazantsev V.I .; Chegurov O.K. A method for the treatment of deforming arthrosis of the elbow joint. (Patent No. 2150909 for application No. 97109755/14 dated 10.06.1997; Class: АВВ 17/56; Date of publication 20.06.2000);

- Oster V.R. Universal conductor for knitting needles and drills // V.R.Oster / Orthopedics, traumatology and prosthetics. - 1976. - No. 5. - S.64-65.

- Dr. honey. Sciences, prof., Acad. NAS of Belarus E.D. Beloenko, Dr. med. Sciences O.L. Eismont. The technology of surgical treatment of isolated injuries of the cartilage of the knee joint (instructions for use) Institution developer: State Institution “Belarusian Research Institute of Traumatology and Orthopedics” Minsk 2007 - prototype.

Claims (1)

A device for tunneling a subchondral bone containing a Kirschner needle, characterized in that the Kirschner needle is provided with calibration marks, the distance between the calibration marks is 1 mm, the length of the calibration marks is 4 cm, and the spoke is inside the cannula with a handle.