Device for transosseous osteosynthesis

 

(57) Abstract:

The invention is used in medicine, namely to traumatology and orthopedics for transosseous osteosynthesis in the mode of stable fixation, and in the mode of compression-distraction device. When used in mode stable fixing impose the device is assembled. Through napraviti-holders 5 with two legs and oblique dialects channel spend the tabs 4 of the bone at an angle to each other and perpendicular to the axis of the bone through the entire thickness of the bone and clamp the latches 4 holders-napravila 5 locking screw 9. When used in mode compression-distraction device through each bone fragment spend spokes 4 and fix them to the base plate 1 by clamps. Base plate 1 is curved oval shape with three rows of holes in staggered parallel to the line of bending of plates have a concave edge maximum near the skin and connect screw terminals for 2 for compression or distraction of the bone fragments. 2 Il.

The invention relates to the field of medical equipment, namely to traumatology and orthopedics.

A device for external osteocyte ludena principle of universality, does not allow to use the device in fractures metatithemi zones, as well as patients in serious condition, such as traumatic shock [1].

A device for external fixation (apparatus Volkova-Hovhannisyan) containing 4 brackets (paladugu), rods, pins, and fasteners. The device consists of interconnected brackets:two major and two guard. The tops of the brackets are connected by a front distractor. The device allows for the fixation of bone strictly along the axis of symmetry of the staples provides rigidity of fixation.

However, the complexity of installation of the device does not allow to use it in extreme circumstances or patients in a serious condition. The device is cumbersome, a large number of spokes, held to the junction through the whole segment, creates the risk of complications:damage to neurovascular formations and purulent. In addition, the device doesn't allow to fix the spokes carried out in many planes [2].

It is also known a device for transosseous osteosynthesis with two lateral and one transverse strap with two rows of holes arranged in a checkerboard pattern connected via fastening elements at an angle 115-120o. On SS="ptx2">

However, the rigidity of fixation in the bracket is created by the tension of the spokes, and therefore, may not provide the necessary quality of fixation. The device does not meet the requirement of universality: cannot provide separate fixation of the bones of the forearm, can not be used for fixation of the pelvis. The fragmentation of the bracket may also be a cause of failure in the treatment of fractures of the weakness in the joints can lead to instability of the fracture and secondary offsets [3].

As a prototype made device for transosseous osteosynthesis with two parallel spaced threaded rod running through nuts primary and secondary plates with spiegelgasse pinned them in pairs diverging spokes with holes plates made in the form of radial slits under spiegelzaal. The device allows separate fixation of the fragments of the bones of the forearm, strong fixation and elimination of all kinds of bias (ed.St. 1457911.CL. A 61 B 17/58,1987).

However, the device is a prototype does not allow you to install more than eight spokes or two rods. The use of the prototype is only possible to secure the forearm in the middle third, because according to what are in the plane of the longitudinal axis, it is obvious that the arm length of less than 10-11 cm to fix this device. The device has insufficient rigidity of fixation, because the intersection of the spokes is in fastening elements, not in the bone plate is installed on the same rod, and between the fixation points there is a great distance. The device is extremely difficult and essentially does not allow optimal reposition tomcom due to the fact that with the elimination of lateral displacement will inevitably appear rotational displacement, while eliminating the angular - side.

The objective of the invention is to provide a highly versatile device for transosseous osteosynthesis in order to ensure reliability and rigidity of fixation, early function of the segment, to reduce the invasiveness of surgical intervention and treatment.

The essence of the invention is that the device containing the support plate, fixing elements, rods, fasteners and clamps bones, each support plate has a curved oval shape and three rows of holes arranged offset in staggered parallel to the line of bending of the support plate, the diameter of the holes corresponds to d is Satarov, having two screw feet under the hole of the support plate, referring to the channel under the latch bones made obliquely downward at an acute angle and locking screw.

The use of the invention allows to obtain the following technical result.

The device is versatile and highly effective. It can be used in practically all locations of fractures, including victims in serious condition in extreme conditions.

The proposed device provides any degree of rigidity of fixation and the reposition of bone fragments in full. The use of the device provides an early function of the segment, a reduction in the morbidity of surgical intervention and the treatment itself.

The device can be used in a modular format, as well as a laser holding the locking elements in the bone.

The use of the device helps to prevent the most common complications: abscess of the soft tissues at the injection clamps and damage to neurovascular structures. In addition, many of the punching holes of the support plates facilitates the device, which increases the comfort of the treatment is what can be applied in extreme circumstances for quick fixation of open fractures in caulobacteria.

Device for external fixation is widely used for the treatment of patients with fractures and their consequences in the local hospital, Severodvinsk and tested in eight patients in the clinic of the Department of traumatology of Ramapo. The device is extremely simple to use, while meeting all the requirements of a compression-distraction apparatus and devices for external fixation.

The technical result is achieved due to the fact that the supporting plate is made arcuate in shape, allowing you to install them very close to the surface of the segment, which in turn provides rigidity and creates a comfortable treatment. Multiple perforations in the supporting plates significantly alleviate the weight of the plate and provide the ability to reposition even a laser introduction clamps bone free link system. Three-row arrangement of apertures are offset in a staggered manner provides the necessary volume repairwoman freedom at any of the stages of the treatment.

Introduction bone fixing elements, wires, rods within two cortical bones, but without their exit from the opposite side of the limb, obespechivayut limb even with concomitant fracture extensive damage to the soft tissues of the segment.

The versatility of the device for external fixation (changing the external dimensions of the supporting plates and the possibility of using many known functional sites) allows you to use the device for fixing any damaged segment.

The leader of the holder with slanted channel located under the latch bones allows you to use the device in extreme conditions in a sterile ready layout, reducing the invasiveness and the timing of surgical intervention.

In Fig. 1 presents a General view of the device of Fig. 2 - leader-holder retainer bones.

Device for external fixation anchor plate 1, connected by means of rods 2 with the fastening elements 3; 4 tabs and napraviti-holders retainers bones 5.

Each plate 1 has a curved oval shape and three rows of outlet openings 6 arranged in three rows with offset in staggered parallel to the bending of the plate.

The diameter of the holes 6 corresponds to the diameter of the rod 2 and the fastening elements 3.

The leader of the holder of the bone clamp 5 has two screw legs 7 of the hole 6 of the support plate is in for transosseous osteosynthesis works in the following way in the mode of stable fixation, for example in emergencies (modular version).

After preparation of the surgical field sterile version of the device placed on the surface of the segment, where the least pronounced layer of soft tissue, for example on the front surface of the leg. Through napraviti-holders 5 will lock the bone 4 (for example, spokes or rods type of corkscrew) at an angle to each other and perpendicular to the axis of the bone through the entire thickness of the bone until you exit the opposite cortical layer. Fixing bone elements 4 clamp locking screw 9 in napravila-holders 5. In the subsequent resolution of the emergency, in the presence of residual displacements carry out the partial dismantling of the machine to which the screw rod 2 between the Central base plate 1 is replaced by repairwoman nodes of any type and make final reposition of the fragments.

The device can be used in the compression mode of the apparatus. To do this, the leader of the holder 5 is replaced by firstordefault known type. Through each piece performed by two or more pins (or rods) 4 at each level, at an angle to each other and perpendicular to the axis of the bone through the entire thickness of the bone to the level of the backing plate 1 spiegelstein, put into the hole of the plate 6. When this plate is concave edge is located near the skin. After that, the base plate 1 connect the screw terminals 2 and perform the compression or distraction of the bone fragments.

Device for transosseous osteosynthesis containing base plate, fixing elements, rods, fasteners and retainers of the bone, wherein each support plate has a curved oval shape and three rows of holes arranged offset in staggered parallel to the line of bending of the support plate, the diameter of the holes corresponds to the diameter of the rods and fasteners, and locking elements are napraviti-holders clamps having two screw feet under the hole of the support plate, referring to the channel under the latch bones made obliquely downward at an acute angle, and locking screw.

 

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