Source: http://www.google.com/patents/US20050107787?ie=ISO-8859-1
Timestamp: 2015-07-03 03:28:11
Document Index: 140418111

Matched Legal Cases: ['art 37', 'art 52', 'art 53', 'art 52', 'art 53', 'art 37']

Patent US20050107787 - Bliskunov device for elongating long bones - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThis invention relates to medicine, in particular to surgical devices for curing the locomotor apparatus with the aid of osteosynthesis. In order to improve operational reliability during implantation, the structure of the inventive device for elongating long bones is embodied in such a way that the...http://www.google.com/patents/US20050107787?utm_source=gb-gplus-sharePatent US20050107787 - Bliskunov device for elongating long bonesAdvanced Patent SearchPublication numberUS20050107787 A1Publication typeApplicationApplication numberUS 10/504,362PCT numberPCT/UA2003/000007Publication dateMay 19, 2005Filing dateFeb 14, 2003Priority dateFeb 18, 2002Also published asEP1477123A1, EP1477123A4, EP1477123B1, US7530981, WO2003068089A1Publication number10504362, 504362, PCT/2003/7, PCT/UA/2003/000007, PCT/UA/2003/00007, PCT/UA/3/000007, PCT/UA/3/00007, PCT/UA2003/000007, PCT/UA2003/00007, PCT/UA2003000007, PCT/UA200300007, PCT/UA3/000007, PCT/UA3/00007, PCT/UA3000007, PCT/UA300007, US 2005/0107787 A1, US 2005/107787 A1, US 20050107787 A1, US 20050107787A1, US 2005107787 A1, US 2005107787A1, US-A1-20050107787, US-A1-2005107787, US2005/0107787A1, US2005/107787A1, US20050107787 A1, US20050107787A1, US2005107787 A1, US2005107787A1InventorsSergey KutsenkoOriginal AssigneeKutsenko Sergey N.Export CitationBiBTeX, EndNote, RefManReferenced by (8), Classifications (6), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetBliskunov device for elongating long bones
US 20050107787 A1Abstract
This invention relates to medicine, in particular to surgical devices for curing the locomotor apparatus with the aid of osteosynthesis. In order to improve operational reliability during implantation, the structure of the inventive device for elongating long bones is embodied in such a way that the axes of the bearing part and the thread screwed part of a screw-holder are offset at a distance ranging from 0.5 to 0.8 mm. A boss (bulge) is embodied on the external body of the device on the side of the orifice in which said screw-holder is fixed. The specific structural embodiment of a finger makes it possible to reduce the traumatic effects of a surgical operation. Images(5) Claims(1)
1. Device for elongating long bones contains an external body and an internal cylindrical pullout hollow body, both connected telescopically, the bodies are equipped with a boss and a groove, the internal body has through orifices for the retention screws, while in the wall of the external body there is a threaded orifice with a screw-holder mounted in it, the screw-holder contains a bearing part and a thread screwed part, and a ratchet-and-pawl, which in its turn is connected with the external body and includes a driving ratchet-wheel with ratchet-teeth, containing a case and a driven teethed ratchet-wheel, the latter contains a body, a retainer ratchet-wheel, and a lead screw located inside the bodies and connected by way of a screw joint with the internal pullout hollow body, the lead screw has a shank end of figured noncircular section designed to interact with a fitting figured orifice in the body of the driven ratchet-wheel, then there is a thrust ring for the lead screw, monolithic with the external body, a telescopic rodded drive with a sphere including a body and a rod, made so that it can move within the body, and connected on one side by means of ears through the axis with a finger, and on the other side—with the driving ratchet-wheel of the ratchet-and-pawl through the sphere of a swing joint, the ratchet-and-pawl is connected with the external body by means of a bayonet joint, on the surface of the driving ratchet-wheel's body there are grooves, non-through in length and depth, which lead out onto the end surface, the driving ratchet-wheel contains a bushing, which on one side has end surface bosses to fit into the grooves made in the body of the driving ratchet-wheel, elements of anchoring the bushing onto the body of the driving ratchet-wheel and a spring located in the bushing, on the other side of the bushing there are end surface ratchet teeth, on one side of the end surface of the driven ratchet-wheel body there are ratchet teeth for interaction with the ratchet teeth of the bushing of the driving ratchet-wheel, while on the other side of the surface of the driven ratchet-wheel's body there are grooves, non-through in length and depth, which lead out onto the end surface, the driven ratchet-wheel also contains a bushing, on one side of which there are end surface bosses to fit into the grooves of the driven ratchet-wheel's body, elements of anchoring the bushing of the driven ratchet-wheel onto the body of the driven ratchet-wheel, a spring, which is also located in this bushing, on the other side of which there are also end surface ratchet teeth, whose direction is opposite to that of the ratchet teeth of the driving ratchet-wheel bushing, the retainer ratchet-wheel is made in the shape of a stop sleeve which has ratchet teeth for interaction with the driven ratchet-wheel's bushing on one end surface, while on the other end surface there is a boss to fit into the groove made in the thrust ring for the lead screw made monolithically with the external body, the boss of the external body is made in the shape of a hemiprismatic dowel, three lateral sides of which have flat surfaces, while on the outer surface of the fourth lateral side, which fits into the inner surface of the external body, are located cylindrical bosses made monolithically with the dowel and so that they can be inserted into the through orifices in the external body, the height of the dowel's bosses corresponds to the thickness of the wall of the external body, in the grooves of the bodies of the ratchet-wheels there are additional closed contour hollows, while in the bosses of the bushings of the ratchet-wheels there are orifices, the elements of anchoring the bushings of the ratchet-wheels onto the bodies of the ratchet-wheels are joint pins mounted into the orifices of the bosses and fitted into the additional hollows of the grooves with a possibility for the bushings to move freely with respect to the bodies, said device being characterized in that the axis of the thread screwed part is shifted with respect to the axis of the bearing part of the screw-holder by 0.5-0.8 mm, on the external body in the region of the threaded orifice, into which the screw-holder is mounted, there is a boss, in the finger connected with the rod through the axis there is a clamp located on the side of the rod and an end surface orifice with a plate for ears screwed into it with a orifice for the axis, and there is a through threaded transverse orifice for the blocking screw of the crest of the iliac bone.
BRIEF DESCRIPTION OF THE FIGURES The invention is illustrated with the graphic matter wherein: FIG. 1—overall view of the device in section FIG. 2—section A-A of FIG. 1 FIG. 3—section B-B of FIG. 1 FIG. 4—section C-C of FIG. 1 FIG. 5—fragment of driving ratchet-wheel FIG. 6—hemiprismatic dowel FIG. 7—view A of FIG. 6 FIG. 8—driven ratchet-wheel FIG. 9—view B of FIG. 8 FIG. 10—retainer ratchet-wheel (stop sleeve) FIG. 11—view C of FIG. 10 FIG. 12—device implantation diagram
THE DETAILED DESCRIPTION OF THE EMBODIMENT The device consists of external body 1 with ratchet-and-pawl mounted in it. The latter contains driving ratchet-wheel 2 in assembly, driven ratchet-wheel 3 in assembly, retainer ratchet-wheel 4 and pullout internal body 5. Sliding boss-groove joint between telescopic external body 1 and internal pullout body 5 is made so that hemiprismatic dowel (boss) 6 located on the inner wall of external body 1 interacts with groove 7 of internal body 5. Driving ratchet-wheel 2 contains body 8 connected on one side by means of swing joint 9 with telescopic rodded drive 10 and bayonet joint 11—with external body 1, while on the other side (see FIG. 5)—with spring 12, bushing 13 and two joint pins 14. Body 8 has six grooves 15, non-through in length and depth, which are inserted into end surface 16 with six bosses 17 of bushing 13 inserted into them with clearance fit (see FIG. 2). Besides, in two opposite grooves 15 of body 8 there are additional closed contour hollows 18, into which joint pins 14 are inserted, so that bushing 13 can freely move with respect to body 8 and which can be kept in assembly due to pads (shoulders) 19 of body 8. On the side opposite to bosses 17 bushing 13 has ratchet teeth 20 for interaction with teeth 21 of driven ratchet-wheel 3 (see FIG. 8). Driven ratchet-wheel 3 contains body 22, spring 23 and bushing 24 with two joint pins 25. On one side, body 22 has ratchet teeth 21 and on the other side six grooves 26, whose design is similar to that of grooves 15 in body 8 of driving ratchet-wheel 2. Body 22 of driven ratchet-wheel 3 is connected with shank end 27 of lead screw 28, which is also located inside bodies 1, 5 and 8 and bushings 4, 13 and 24 in noncircular figured orifice 29. The structural design of bushing 24 with two joint pins 25 is similar to the design of bushing 13. It also has six bosses 30 inserted into grooves 26, while in two opposite grooves 26 are also made additional hollows 31, where joint pins 25 are inserted. On the opposite side, bushing 24 has ratchet teeth 32, which interact with teeth 33 of retainer ratchet-wheel 4 and have mutually opposite directions (see FIGS. 8, 9, 10, and 11). Retainer ratchet-wheel 4 is made in the shape of a bushing which on one side has ratchet teeth 33, while on the other side there is boss 34 made so that it can be inserted into groove 35 made in monolithic thrust ring 36 of external body 1. Threaded part 37 of lead screw 28 has a screw joint with threaded area 38 of internal body 5, whose length corresponds to the estimated lengthening of the bone. FIG. 6 shows the hemiprismatic dowel 6, whose structure has got an essential advantage due to the increase in number of its bosses 39, which permits to strengthen the mechanical characteristics of dowel 6 without deteriorating the resistance of the wall of body 1 to power load. Mounting dowel 6 on the inside wall of body 1 will make it possible to encase it in closed space between the wall of external body 1 and groove 7 of pullout internal body 5, which helps to resolve the problem of its safe anchoring. Rod 40 of rodded drive 10, which is made so that it can shift in body 41, is connected with finger 43 through axis 42. Finger 43 is equipped with clamp 44 and end surface orifice with plate 45 for ears 46 screwed into it. In finger 43 there is a through threaded transverse orifice for blocking screw 47 of the crest of the iliac bone. Rod 40 is connected by means of screw joint 48 with sphere 49 of swing joint 9. Body 1 is fixed onto proximal bone fragment 50 (see FIG. 12) using screw-holder 51 equipped with threaded part 52 and bearing part 53. A 0.5-0.8 mm shift of axes of threaded part 52 and bearing part 53 of screw-holder 51 provides self-locking which prevents screw-holder 51 against unscrewing. Body 5 is fixed onto distal bone fragment 54 with retention screws 55 and 56 inserted into the orifice of body 5. On the side of the threaded orifice on external body 1, into which screw-holder 51 is mounted, there is boss (bulge) 57 to provide sufficient thickness of the wall of body 1. The ratchet-and-pawl of the device works as follows: When driving ratchet-wheel 2 is turned counterclockwise (as seen from where telescopic rodded drive 10 is) by the angular distance of the ratchet-and-pawl, due to the linkage of teeth 20 and 21, driven ratchet-wheel 3 will be turning simultaneously, transmitting rotation to lead screw 28 through noncircular profiled joint 29 (see FIG. 3). At this point, bushing 24 acts as a locking device and its teeth 32 jump over teeth 33 of stop sleeve 4. When driving ratchet-wheel 2 is turned clockwise, an idle stroke is performed, with teeth 20 of bushing 13, which at this point acts as a ratchet, jumping over teeth 21 of body 22 of driven ratchet-wheel 3. At this point stop sleeve 4, whose teeth 33 will be interacting with teeth 32 of bushing 24, will not let driven ratchet-wheel 3 make a turn. At such a pattern of interaction of the components of the ratchet-and-pawl, the power load acting on the device will not in any way affect the reliability of its functioning. The advantage of the structure of dowel 6 (see FIGS. 6 and 7) lies in the fact that due to the increase in the number of bosses 39 it is possible to calculate its requisite mechanical characteristics without weakening the resistance of the wall of body 1 to power load. Mounting dowel 6 on the inside wall of body 1 makes it possible to locate it in closed space between the wall of external body 1 and groove 7 of internal body 5, which helps to resolve the problem of its reliable anchoring. During surgical treatment the patient is laid on his/her side so that the limb to be operated on should be bent in the knee and hip joints. Cuts in the soft tissues are made over the greater trochanter and over the upper flaring portion of the iliac bone. Using a drill, whose diameter corresponds to the outer diameter of body 1, a channel in the medullary cavity of the femur is drilled through the greater trochanter to the depth required for mounting of the entire device. Next comes osteotomy (bone cutting), which is done by any known way, which helps get two bone fragments: proximal 50 and distal 54. Fragment 54 is fixed onto internal body 5 using screws 55 and 56, while in fragment 50 mutually two perpendicular orifices for screws 51 and 52 are drilled. The device is placed inside the femur, screw 51 is screwed into body 1 through the cortical layer of the femur. Next, the telescopic rodded drive is introduced through the greater and medium sciatic muscles, a transverse orifice is drilled in the wing of the iliac bone, and finger 43, equipped with clamp 44 and end surface orifice with plate 45 for ears 46 screwed into it, is inserted into this transverse orifice. Through axis 42 finger 43 is connected with body 42. A cut is done on the skin over the crest of the iliac bone, and a orifice coaxial with the transverse orifice in finger 43, through which it is fixed by means of blocking screw 47, is drilled in the bone. The wounds are then sutured. During the postoperative period, after removal of stitches the patient is asked to turn his/her leg around the long axis of the hip first inwards then outwards. The number of teeth in ratchet-wheels 2 and 3 and in bushing 4 is 18 each, while the actuation (functioning) angle makes up 20�. When turning the hip inwards (working stroke) telescopic rodded drive 10 returns driving ratchet-wheel 2 through swing joint 9 back to the actuation angle and through teeth 20 of its bushing 13 transmits the torque on tooth 21 to body 22 of driven ratchet-wheel 3. Driven ratchet-wheel 3 further transmits the torque onto lead screw 28 through the joint of noncircular figured shank end 27 and orifice 29. At this point, teeth 32 of bushing 24 of driven ratchet-wheel 3, acting as a spring loaded ratchet, jump over the teeth of retainer ratchet-wheel 4. When turning the hip outwards (idle stroke) the formed power circuit (lead screw 28, pullout body 5, retainer wheel 4, driven ratchet-wheel 3) fixes body 22 of driven ratchet-wheel 3 against the axis shift with respect to shank end 27 of lead screw 28, while teeth 20 of bushing 13 of driving ratchet-wheel 2 jump over teeth 21 of body 22 of driven ratchet-wheel 3, which makes bushing 13 interlock for the next working stroke. At a such kinematic pattern of the ratchet-and-pawl, the body of driven ratchet-wheel 22 is kept permanently fixed against the axial shift by forces of friction, both during the working and idle strokes of the ratchet-and-pawl. The functions of shifting are performed by bushings 13 and 24 mounted outside the zone of action of the power circuit. The number of couples of turns within 24 hours is chosen depending on the lengthening rate and the step angle of threaded part 37 of lead screw 28. At a 1 mm per 24 hrs lengthening rate and a 1 mm step angle of the threading 18 couples of turns are required within 24 hours. After achievement of the estimated lengthening, e.g. 10 cm, which corresponds to the length of threaded area 38 of body 5, telescopic rodded drive 10 can be removed. For this purpose, a 2-3 cm cut is done in the region of the wing of the iliac bone, connections of finger 43 of telescopic rodded drive 10 with blocking screw 47 and plate 45 are disconnected and rod 40 with sphere 49 is unscrewed. After maturing of the distraction regenerate (i.e. when the density of the callus formed as a result of the bone lengthening equals the density of the bone) the device is to be removed out of the bone as an ordinary intraosseous retainer, for which purpose retention screws 51, 52, 55 and 56 are removed and a cut in the region of the greater trochanter is done. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7708737 *Jul 12, 2006May 4, 2010Intramed Systems LtdIntramedullar distraction device with user actuated distractionUS8057472May 15, 2008Nov 15, 2011Ellipse Technologies, Inc.Skeletal manipulation methodUS8419734Oct 20, 2011Apr 16, 2013Ellipse Technologies, Inc.Skeletal manipulation methodUS8449543Sep 3, 2010May 28, 2013Ellipse Technologies, Inc.Bone growth device and methodUS8715282Feb 10, 2012May 6, 2014Ellipse Technologies, Inc.System and method for altering rotational alignment of bone sectionsUS8852187Feb 10, 2012Oct 7, 2014Ellipse Technologies, Inc.Variable length device and methodUS8852236Nov 30, 2012Oct 7, 2014Ellipse Technologies, Inc.Expandable rod system to treat scoliosis and method of using the sameUS9011499Jan 21, 2015Apr 21, 2015Ellipse Technologies, IncExpandable rod system to treat scoliosis and method of using the same* Cited by examinerClassifications U.S. Classification606/57International ClassificationA61B17/72Cooperative ClassificationA61B17/66, A61B17/7216European ClassificationA61B17/66, A61B17/72CLegal EventsDateCodeEventDescriptionSep 5, 2008ASAssignmentOwner name: CRIMEAN TRAUMATOLOGY AND ORTHOPEDICS CENTRE NAMEDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KUTSENKO, SERGEY NIKOLAEVICH;REEL/FRAME:021493/0274Effective date: 20050617Oct 24, 2012FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services