RU554U1 - Distraction apparatus - Google Patents

Abstract

1. A distraction apparatus comprising two extreme and middle supports movably connected to each other by means of their relative movement, including a threaded rod with a drive device for its rotation, equipped with a ratchet mechanism kinematically connected to a cam mounted on the output shaft of the electric drive reducer, the latter is electrically connected to the electronic control unit, which contains a generator, a trigger and an electronic key, characterized in that each threaded rod is connected at one end to an actuating device pivotally mounted on one of the extreme supports, and the other screwed into a tube equipped with clamps, mounted for rotation on the middle support and connected to the other extreme support by a threaded pair, the screw of which is screwed into the tube at one end and pivotally connected to the corresponding extreme a support, while the drive device is equipped with a position sensor having the possibility of indirect contact with the cam and electrically connected to the control unit. 2. The apparatus according to claim 1, characterized in that the control unit generator is connected via a programmable counter divider to the S-input of the trigger, the R-input of the latter is connected to the position sensor, while the trigger output is connected to the key circuit of the actuator, in addition, the position sensor through a conversion device and a decoder connected to a digital indicator. 3. The apparatus according to claim 1, characterized in that the screw of the threaded pair is rigidly connected to the tube at one end and screwed into the nut pivotally mounted on the other extreme support with the other. The apparatus according to claims 2 and 3, characterized in that the latch is made

Description

DISTRACTION DEVICE.

This useful model relates to medical equipment used in orthopedics and traumatology in the treatment of diseases of long bones of the bones, and more specifically, to devices for transdermal osteosynthesis.

State of the art

Known compression-distraction appensat / sv, A. 14S3114, publ. 09/15/88, bul. No. 34 /, containing supports with threaded rods, and including a housing with a ratchet nozzle mounted on a threaded threaded rod, a power element made of a material with a shape memory effect, connected to a spring and ratchet and having a heater electrically connected to the control unit and a power source in which the power element has a straight-line zurm, is stretched by a spring, placed in the housing nozzle and fixed in it.

This compression-distraction apparatus allows the elongation of a long tubular bone in an automatic regshma when performing one osteotomy on one segment of the limb.

However, this apparatus cannot be used to lengthen a long tubular ueoti when performing two osteotomies on one segment of a limb, since its design does not have a middle support, on which spokes are fixed, which sew an intermediate osteotomized fragment of a long tubular bone.

A device with automatic traction for osteosynthesis / WO, International application No. 89/11255, publ. 89.11.30, No 28 /, containing two. supporting e. promechutnoe supporting element, on which are fixed% bone fragments. Supporting elements of interconnection l iS | i with the possibility of mutual displacement, by means of s, f x F in ratchet mechanisms, one of which is connected to the drive with an equipped control unit.f.j -. 21

In this device, the segment is lengthened by the simultaneous osteotomyrrhosis of the bone bone. However, the absence in it of a modern eshl, allowing the implementation of alternate Zhif, does not allow the well-known area of technology.

For every urobk by the rate of distraction.

Utility Model Essence

The proposed distraction apparatus allows metered distraction to be performed alternately at two levels in an automatic mode, which improves the conditions of bone tissue regeneration due to the constant uniform microdisplacement of bone fragments.

MAKING A SECOND-HAND MODEL, DAY STRUCTURE SiliiSipSiT, CONTAINS

two extreme and middle supports movably interconnected with

POSITION SR9DSTB THERE'S ANSWERING FROM THE BURNING SYSTEM, INCLUDED

bobbers rod with a convenient device bgo Bratschbnin equipped with a ratchet mechanism kinematically connected to a cam mounted on the inlet unit of the electric drive reducer, the latter is electrically connected to the electronic control unit, which contains

the rod is connected at one end to a drive device pivotally mounted on. one of the extreme supports, and the other end of the BRBShchen in a tube equipped with clamps, mounted with the possibility of rotation on the middle support and connected with another extreme support threaded

pair, one end BINT KYuTOrOI BVIacheN in TruiKU, S DruPSh - ShZrnirno connected to the support at at sootBbtotBuyuschey ztom driving device is provided with a position sensor, having a possibility of indirect contact with the cam and is electrically connected to the control unit.

This embodiment of the distraction apparatus makes it possible to participate in the work of one threaded pair of means for the relative displacement of the supports, which allows the osteotomized fragments to be moved alternately at one and the other levels with the corresponding elongation rate for each level. In addition, such an arrangement will make it possible to design the Distribution Appliance, reduces the likelihood of being stuck in threaded pairs, increases the reliability of the apparatus, and saves energy consumption of battery packs.

It is advisable that when the machine is pulled out, the generator should be connected through a programmer, w1, w1, s, c, divider to the S-input of the trigger, and the R-input of the latter be connected by a position transmitter, while the output of the trigger is connected to the main circuit of the actuator j.A / 930CHN69

- чUW U

ma, in addition, the position sensor is connected to a digital indicator through a transfer device and a decoder.

This embodiment of the apparatus ensures the identity of the operation of all drive devices, regardless of the rotation speed of the electric drive, the load perceived by it and the voltage of the battery bATZr8I, hvm. WHERE DOES THE ACCURACY ACCURACY ACCESSIBLE TEMPZ OF APPLICATION

supports for each threaded rod.

in an embodiment of the apparatus, in order to reduce the likelihood of jamming in threaded pairs, to increase the reliability of the apparatus, to save power consumption of the batteries of the power supply unit, the screw of the threaded pair should be screwed into the tube with one end and pivotally connected to the corresponding extreme pair with the other.

When lengthening short limb segments, for close proximity of the apparatus supports, it is advisable that the screw of the threaded pair with one end be rigidly connected to the tube and the other screwed into the nut pivotally mounted on the other extreme support.

In the future, the claimed distraction is illustrated by specific examples of its implementation and the accompanying drawings in which:

FIG. 1 schematically depicts a general view of an apparatus according to a utility model;

FIG. c schematically depicts the kinematics of the means of relative displacement associated with the electronic control unit;

FIG. 3 illustrates a functional electronic circuit of a control unit;

FIG. 4 depicts the kinematic connection of the support 2 (FIG. 1) with a moving means;

FIG. 5 represents the construction of the latch schematically depicted in FIG. 2, 4.

The best options for implementing the utility model.

The distraction apparatus according to the useful model contains two extreme supports 1, 2 (Fig. 1) and an average support 3, movably connected between the other means of relative movement 4. On each of the extreme 1, 2 and the intermediate supports are fixed over intersecting knitting needles 5. Each of the means of relative movement 4

consists of a drive device pivotally connected to the extreme support 1 and connected to one end of the threaded rod 7, the second KiKbC of which is BINCHVK B-Truyu o, which is SHUT-SHAPED with SHOCK SHAFT rotation on the middle support 3 by means of the gripper 9 and W, and at the same time 9 W , oxyZhBccok liiHKosTopSwK JU, jx, cBHssK G with one end of the threaded rod 12, the second end of which is pivotally connected to the extreme support 2.

Each of the drive devices b, 5, b (Fig. 2) contains a micromotor 12 connected to a gear 13, on the output shaft of which a cam 14 is installed, placed in the groove of the slider 15. The latter is connected to the dog 16 of the ratchet wheel 17 and has the ability to contact a position sensor, made in this example in the form of a microswitch 18 (Fig. 3) electrically connected to an electronic control unit, which contains a generator 19 connected to a programmable counter divider 20 and, respectively, with RS flip-flops 21, 21, 21. In this case, the microswitch Atoms 18, 18 are connected respectively with SS, 22, and RS-flip-flops 21, 21. The switch 18 is connected with RS-flip-flop 21 and recalculation device 22. R3-triggers 21, 21% 21 and

h- -v m t "Tj- nrr-i f SSE 11 j-j rrtT f ttch j- tt. -r.- j-44-v rf i-i j-gtt fi -rnvrv

nepeuHexntdt yuxyunuxBci cc, ,,, c, and their children; t ± 5ppp and tj njiiu speech circuits 23, 23, 23, decoders 24, 24, 24, digital indicators 25, 25, 25 and, respectively, with drive devices b, b, b.

It is advisable that the tube 8 (Fig. 4) be made with a screw 26 of a threaded pair rigidly connected to it at one end, which is screwed into the nut 27 pivotally mounted on the extreme support 2. In this case, one of the latches is made in the form of a locking screw 28 j-ni- ri f -r J rv -r- f-.

nuiu "a szs1lds1te a.

In an embodiment of the distraction apparatus, each of the clamps 10, 11 (Fig. 5) can be made in the form of a L-shaped tubular element 29, one end of which is provided with a thread 30, and

another BIKHOM 31.

A distraction apparatus designed to lengthen a limb segment when performing two osteotomy works as follows. about

. Knitting needles and a corresponding BetBank attach to supports 1, 2 and 3. Supports 1, 2, 3 with the ability to move, connect them with relative movement 4.

After 3-5 days, the electronic control unit was connected about the power source to the means of relative movement 4 (Fig. 3). The electronic control unit sets the necessary mode of operation of each means of relative displacement B depending on medical tasks. In this case, the generator 19 of the control unit generates electrical pulses that are fed to the programmable counter-divider 20, from the output of which such pulses are fed to the S-inputs of the RS-flip-flops 21, 21, 21 and translates them into 1 state. The outputs of the flip-flops 21, 21, 21, connected to the inputs of the key circuits 23, 23, 23, go from the closed state to B open and turn on the microelectrodes Big 12, 12, 12 of each means of relative movement 4. In this case, the Rotation from each micro-electrode Big 12 (12, 12 ) is transmitted to the gearbox 13 connected to it (Fig. 4). A cam 14 mounted on the output shaft of the gearbox 13 of the BOZ moves the slider 15 with the dog 16. The obochachka 16 captures the tooth of the ratchet wheel 17, rotating the ratchet wheel 1t together with the threaded rod t tightly connected to it during the reverse stroke. At the end of the stroke, the slider 15 is in contact with the microswitch 18.

The corresponding signals from the microswitches 18, 18, 18 (Fig. 3) of each means of relative movement 4, are received

tt j-a P t% hg. TrT t ht ht | J-1 GE l If tm J-b 1g j-hh-j-gtg1-g g "tj-t g t (If I V-h j-h 1-gt G

BUT, n-lengths xtjui-i-etjuii lx, c, i, lx w will see silt and iiiiiii.

The latter transfer the key circuits to the closed state and turn off the microelectrodes, the readers 12, 12, 12. If the engines have different rotational speeds or different loads on the means of relative movement 4, then the means of relative movement 4 will have different cycle times. Therefore, the shutdown of the microsLVKTRODvigTvLvI using the microswitches A.se, ± o, io and UD0t

not carried out simultaneously, after the completion of the cycle by each means of relative movement 4. The switching frequency is carried out by the generator 19 and the programmable counter-divider 20, and the indicators of the digital indicators determine the amount of movement and, accordingly, the magnitude of the segment elongation. To carry out the movement of the support 1, relative to the supports 2, 3,

SCREW rod 7 is unscrewed, and the locking screw of the clamp 11 connected to the threaded rod 1 is tightened. At the same time, the threaded rod 7 MUST be pulled out of the tube o to support 2, 3 relative to the support 1. To move the supports 1, 3 relative to the support 2, the latch 10 is tightened and the latch 11 is unscrewed. In this case, the threaded rod 7 is broken together with the tube 8, forcing the threaded rod 12 to be unscrewed from the tube 8, changing the support 2 relative to the supports 3, 1. By tightening and releasing the corresponding latches, the support 1 is alternately moved relative to the supports 3, 2 and / or the support is moved 2 relative to supports 3 and 1. For example, at night, bone fragments are moved by fixed support 1, 2, and during the day - support 3 and 2. If the extensible segment of the limb is short and the supports are close to each other, then other vsholneniya second embodiment relative moving means supports (Fig. 4). To move the support 1 relative to the supports 2, 3, the latch 28 is tightened, and the latch 11 is released. When the threaded rod 7 is rotated, it is unscrewed from the tube 8 and the supports 2, 3 move. Relate to the supports 1. To move the support 2 relative to the supports 3, 1, the latch 28 is released, and the latch 11 is tightened. The rotation of the threaded rod 7 occurs together with the tube 8 causing the nut 27 to move along the threaded rod 26.

A / 9

Claims (4)

1. A distraction apparatus comprising two extreme and middle supports movably connected to each other by means of their relative movement, including a threaded rod with a drive device for its rotation, equipped with a ratchet mechanism kinematically connected to a cam mounted on the output shaft of the electric drive reducer, the latter is electrically connected to the electronic control unit, which contains a generator, a trigger and an electronic key, characterized in that each threaded rod is connected at one end to an actuating device pivotally mounted on one of the extreme supports, and the other screwed into a tube equipped with clamps, mounted for rotation on the middle support and connected to the other extreme support by a threaded pair, the screw of which is screwed into the tube at one end and pivotally connected to the corresponding extreme a support, while the drive device is equipped with a position sensor having the possibility of indirect contact with the cam and electrically connected to the control unit. 2. The apparatus according to claim 1, characterized in that the control unit generator is connected via a programmable counter divider to the S-input of the trigger, the R-input of the latter is connected to the position sensor, while the output of the trigger is connected to the key circuit of the actuator, in addition, a position sensor is connected to a digital indicator through a conversion device and a decoder. 3. The apparatus according to claim 1, characterized in that the screw of the threaded pair is rigidly connected to the tube at one end and screwed into the nut pivotally mounted on the other extreme support with the other. 4. The apparatus according to claims 2 and 3, characterized in that the latch is made in the form of a L-shaped element, a screw is installed on one end of the screw, and the other is threaded.