CN218106022U - Device for fixing bone fragments of intertrochanteric fracture - Google Patents
Device for fixing bone fragments of intertrochanteric fracture Download PDFInfo
- Publication number
- CN218106022U CN218106022U CN202220865183.3U CN202220865183U CN218106022U CN 218106022 U CN218106022 U CN 218106022U CN 202220865183 U CN202220865183 U CN 202220865183U CN 218106022 U CN218106022 U CN 218106022U
- Authority
- CN
- China
- Prior art keywords
- elastic band
- steel wire
- bone fragments
- elastic
- band
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Surgical Instruments (AREA)
Abstract
The utility model relates to a device for fixing fractured bone fragments between trochanters of femur, which belongs to the technical field of medical instruments. Comprises 2 strip-shaped fixtures; the strip-shaped fixture comprises a steel wire used for matching with a steel wire guider to penetrate through soft tissues around bone fragments and an elastic band connected with one end of the steel wire and used for bundling the bone fragments; one end of the elastic band far away from the steel wire is provided with a snap ring which is used for connecting the two ends of the elastic band and is fixed on the periphery of the femur in an annular shape. Through the utility model discloses a have elastic nonabsorbable elastic band, reset, fix the bone fragment that influences postoperative thighbone-interior plant stability, can avoid the electrolysis of traditional apparatus in the body fluid, effectively resume soft tissue microenvironment around the fracture, reduce complications such as patient's postoperative hip pain. The use of the elastic band avoids the cutting effect of the traditional instrument on bone fragments and peripheral soft tissues, obviously reduces the failure rate of the operation, reduces postoperative complications and improves the prognosis of patients.
Description
Technical Field
The utility model relates to a device for fixing bone fragments of intertrochanteric fracture belongs to medical instrument technical field.
Background
With the increasing aging of the population, the incidence of hip fracture of the elderly is increasing year by year (1) . Among the intertrochanteric fractures, up to 45-50% of which, 50-60% are classified as unstable fractures (2) . According to the most commonly used classification system, the arbeitsmeinspift fur osteosyntheself healing classification, the Evans-Jensen classification and the association of orthopedic trauma (AO/OTA) classification, an intertrochanteric fracture typically involves four bone fragments: distal femur, neck femur, greater trochanter and lesser trochanter (3) . At present, the distal femur, the neck femur and the proximal and greater trochanter bone fragments are usually anatomically reduced and fixed by the orthopedist through operations (4,5) . Although the lesser trochanter separation rate in intertrochanteric fracture is as high as more than 50%, the lesser trochanter bone fragments are generally not appreciated and treated by orthopaedics doctors (5) . But according to a recent systematic overview (6) The role of lesser trochanter as an important structure of the posterior medial wall of the femur in stress distribution and reconstruction stability of intertrochanteric fractures is demonstrated. Three types of small rotors requiring repositioning fixation are suggested in this article: the displacement distance of the small rotor is more than or equal to 2 cm; the number of small trochanter bone fragments is more than or equal to 2, and the small trochanter bone fragments occupy the inner side wallThe area is more than or equal to 75 percent; the fracture line containing the lesser trochanter fragment reaches or exceeds the posterior lateral midline. At present, even though orthopedists claiming to reposition the lesser trochanter in the operation are domestically protected, the orthopedists are generally fixed by using instruments such as steel wires, steel cables, memory alloys and the like (2) . However, these devices often fail to achieve their intended purpose, such as post-operative steel wire slippage, post-operative hip chronic pain, fixation failure, high medical costs, etc., often limit the use of such devices (7,8) . Therefore, there is a need in the art for a novel instrument to avoid adverse events such as failure of the operation due to the cutting of soft tissue, electrolysis of microenvironment, and displacement of bone fragments after the operation, and to achieve a firm elastic fixation of the bone fragments, thereby improving the prognosis of the patient.
Reference:
1.Bhandari M,Swiontkowski M.Management of Acute Hip Fracture.N Engl J Med(2017)377(21):2053-62.Epub 2017/11/23.doi:
10.1056/NEJMcp1611090.PubMed PMID:29166235.
2.Wu HF,Chang CH,Wang GJ,Lai KA,Chen CH.Biomechanical investigation of dynamic hip screw and wire fixation on an unstable intertrochanteric fracture.Biomed Eng Online(2019)18(1):49.Epub 2019/04/26.doi:10.1186/s12938-019-0663-0.PubMed PMID:31018860；PubMed Central PMCID:PMCPMC6482576.
3.Schenkel M,Kaniewska M,Bühler T,Anderson S,Eid K.No difference in flexion power despite iliopsoas fatty degeneration in healed hip fractures with large lesser trochanter displacement.Eur J Orthop Surg Traumatol(2018)28(7):1313-9.Epub 2018/04/15.doi:
10.1007/s00590-018-2200-4.PubMed PMID:29654407；PubMed Central PMCID:PMCPMC6132924.
4.Zhang Y,Sun Y,Liao S,Chang S.Three-Dimensional Mapping of Medial Wall in Unstable Pertrochanteric Fractures.Biomed Res Int(2020)
2020:8428407.Epub 2020/07/01.doi:10.1155/2020/8428407.PubMed PMID:32596385；PubMed Central PMCID:PMCPMC7285401.
5.Liu X,Liu Y,Pan S,Cao H,Yu D.Does integrity of the lesser trochanter influence the surgical outcome of intertrochanteric fracture in elderly patientsBMC Musculoskelet Disord(2015)16:47.Epub 2015/04/17.doi:10.1186/s12891-015-0492-7.PubMed PMID:25879412；PubMed Central PMCID:PMCPMC4373059.
6.Yang A-L MW,Wu J-G,He Y-Q,Ni H-F,Li H-L and Dong Y-H When to Reduce and Fix Displaced Lesser Trochanter in Treatment of Trochanteric Fracture:A Systematic Review..Front Surg(2022)9:855851.doi:
10.3389/fsurg.2022.855851.
7.Ehlinger M,Favreau H,Eichler D,Adam P,Bonnomet F.Early mechanical complications following fixation of proximal femur fractures:From prevention to treatment.Orthop Traumatol Surg Res(2020)106(1s):S79-s87.Epub 2019/11/05.doi:10.1016/j.otsr.2019.02.027.PubMed PMID:31680016.8.Patti JW,Ouellette H,Bredella MA,Torriani M.Impingement of lesser trochanter on ischium as a potential cause for hip pain.Skeletal Radiol (2008)37(10):939-41.Epub 2008/08/07.doi:10.1007/s00256-008-0551-3.PubMed PMID：18682931。
disclosure of Invention
The utility model aims to solve the technical problem of how to fix bone fragments more optimally in intertrochanteric fracture.
In order to solve the above problems, the technical solution of the present invention is to provide a device for fixing fractured bone fragments between trochanters of femur, comprising 2 strip-shaped fixtures; the band-shaped fixture comprises a steel wire which is used for matching with the steel wire guider to pass through soft tissues around the bone fragments and an elastic band which is connected with one end of the steel wire and used for binding the bone fragments; one end of the elastic band far away from the steel wire is provided with a snap ring which is used for connecting the two ends of the elastic band and is fixed on the periphery of the femur in an annular shape.
Preferably, the elastic band is provided with scales along the length direction of the elastic band.
Preferably, the clamping ring is of a hollow two-layer cavity structure with openings at two ends, and two cavities of the two-layer cavity structure are respectively provided with a space for passing through the elastic band; the inner side wall of the cavity is provided with teeth for closing the cavity and clenching the elastic belt.
Preferably, the snap ring is hollow and square.
Preferably, the length of the elastic band of the 2 band-shaped fixtures is 30cm and 50cm, respectively.
Preferably, the elastic band is made of a non-absorbable elastic material, and the elastic modulus is 533MPa.
Preferably, the width of the elastic band is 5mm, and the thickness is 2mm.
Preferably, the steel wire has a length of 30cm and a diameter of 1.5mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a pair of a device for fixing fracture bone fragment between thighbone trochanter can guide steel wire-elastic band to the outer lateral border of bone fragment through the steel wire director, and then approaches two length of thighbone cortex through elastic modulus and be 30cm and 50 cm's unabsorbable elastic band respectively, ties up the upper end and the lower extreme of little trochanter bone fragment to inside wall and the lateral wall to the thighbone reach firm elastic fixation. Compare in traditional apparatus such as steel wire, steel cable, memory alloy, the utility model discloses a material characteristic of elastic band can greatly avoid among the fracture microenvironment electrolysis take place, can restrict sliding of bone piece through bigger lifting surface and higher coefficient of friction, but showing the reduction to the cutting effect of normal tissue around the piece simultaneously. Because the elastic band is marked with the scale and makes the result of tying up can record with digital mode, through the utility model discloses the wide application and the multicenter clinical trial of apparatus can foresee to have more statistics in the future and follow the concrete data of tying up of evidence foundation to help orthopedics doctor carry out clinical decision better. In addition, the utility model has relatively low price, thus obviously reducing the burden of the patient and the public health service in China.
The utility model discloses a have elastic nonabsorbable elastic band, reset, fixed to the bone fragment that influences postoperative thighbone-interior plant stability, can all carry out powerful effectual elastic fixation to the inside and outside, preceding, the back wall of thighbone. Due to the material characteristics, the electrolysis of traditional instruments such as steel wires, steel cables and the like in body fluid is avoided, so that the microenvironment of soft tissues around fracture is effectively restored, and the complications such as postoperative hip pain of a patient are reduced. More importantly, the elastic band greatly avoids the cutting effect of the traditional apparatus on bone fragments and peripheral soft tissues (tendons, blood vessels, nerves and the like), can obviously reduce the failure rate of the operation, and reduces serious postoperative complications, thereby improving the prognosis of patients.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a schematic side view of the present invention.
Fig. 3 is a schematic view of the top view structure of the present invention.
Fig. 4 is a first schematic view of a fixing device according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating a second use of the fastening device according to an embodiment of the present invention.
Fig. 6 is a third schematic view of a fixing device according to an embodiment of the present invention.
Reference numerals: 1. a steel wire; 2. an elastic band; 3. a snap ring.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1-6, the present invention provides a device for fixing intertrochanteric fracture bone fragments, comprising 2 strip-shaped fixtures; the band-shaped fixture comprises a steel wire 1 for matching with a steel wire guider to penetrate through soft tissues around bone fragments and an elastic band 2 connected with one end of the steel wire 1 and used for binding the bone fragments; one end of the elastic band 2 far away from the steel wire 1 is provided with a snap ring 3 which is used for connecting the two ends of the elastic band 2 and is fixed on the periphery of the femur in an annular shape. Scales are arranged on the elastic band 2 along the length direction of the elastic band 2. The clamping ring 3 is of a hollow two-layer cavity structure with openings at two ends, and two cavities of the two-layer cavity structure are respectively provided with a space for penetrating through the elastic band 2; the inner side wall of the cavity is provided with teeth for closing the cavity and clenching the elastic belt 2. The snap ring 3 is hollow and square. The length of the elastic band 2 of the 2 band-shaped fixtures is 30cm and 50cm respectively. The elastic band 2 is made of a non-absorbable elastic material and has an elastic modulus of 533MPa. The elastic band 2 has a width of 5mm and a thickness of 2mm. The steel wire 1 has a length of 30cm and a diameter of 1.5mm.
Examples
The to-be-solved technical problem of the utility model is how to fix the bone plate more optimally in the intertrochanteric fracture art. In order to solve the technical problem, the utility model provides a supporting apparatus of fixed lesser trochanter and lateral wall sclerite in the intertrochanteric fracture art is one set of and 50cm is one set for 30cm respectively, passes the steel wire 1 of soft tissue around the sclerite including being used for cooperating the steel wire guide respectively for tie up the non-absorbable elastic band 2 of sclerite, and be used for tying up the snap ring 3 that plays the effect of fixed elastic band 2 when the sclerite finishes. The steel wire 1 is a common orthopedic instrument, the tail end of the steel wire is reversely folded into a twist shape and is tightly connected with one end of the non-absorbable elastic belt 2 in a buckling manner; the tail end of one side of the non-absorbable elastic band 2 is reversely folded and fixed on the trunk of the elastic band 2, but a reverse folding gap is remained, and the reverse folding gap is tightly connected with the gap of the twist-shaped tail end of the steel wire in a buckling manner;
the clamping ring 3 is a common orthopedic surgical instrument and comprises two parallel tunnels, the clamping ring 3 is fixed at one end of the elastic band 2 through one tunnel, the other tunnel can be penetrated through the other end of the elastic band 2, and when the elastic band 2 is used for binding bone fragments, the intersection of the two ends of the elastic band 2 is fixed through a pressurizing clamp.
Wherein, the length of the steel wire 1 is 30cm, and the diameter is 1.5mm.
The non-absorbable elastic band 2 is made of polypropylene, and considering that most of intertrochanteric fracture patients are senile osteoporosis patients, the elastic modulus close to femoral cortical bone (bone density of 75% of normal value, and the average elastic modulus is 533 MPa) is taken as: 533MPa, 30cm and 50cm in length, 5mm in width and 2mm in thickness. The elastic band 2 is provided with scales which extend to 300mm and 500mm from the joint of the steel wire and the elastic band to the other end gradually from 0mm.
Wherein, the size of the snap ring 3 is 20 × 2 × 2mm, which is similar to the ligation fixing device commonly used for the steel cable of the orthopedic appliance and needs to be matched with a pressurizing clamp of the orthopedic appliance.
The embodiment provides an instrument for fixing bone fragments in intertrochanteric fracture, which is hereinafter referred to as a fixing instrument for short, and as shown in fig. 1, fig. 2 and fig. 3, the instrument comprises a steel wire 1 for matching with a steel wire guider to penetrate through soft tissues around the bone fragments, and a twist-shaped tail end of the steel wire 1 is connected with a reverse folding end of a non-absorbable elastic band 2 in a snap-in manner, so that the two are closely inseparable. The non-absorbable elastic band 2 for binding the bone fragments has elasticity with an elastic modulus close to the femoral cortex of 533MPa, one end of which is tightly connected with the twisted tail end of the steel wire 1, and the other end of which passes through 1 tunnel of the snap ring 3 and is fixed on the elastic band 2 close to the tail end thereof by the snap ring 3. The snap ring 3 which is used for fixing the elastic band 2 when the elastic band 2 is used for binding the bone fragments has two parallel tunnels, the upper part and the lower part in the tunnels are provided with teeth, the fixation is firm, and the use is carried out by matching with orthopedic instruments 'pressurizing pincers'.
Wherein, the length of the steel wire 1 is 30cm, the diameter is 1.5mm, and the surface is smooth and has no scales. The elastic band 2 is marked with scales, the unit is millimeter (mm), the scales are gradually set to be 0mm from the joint of the elastic band 2 and the steel wire 1 and gradually extend to the scales of 300mm and 500mm from the other end, the scales are matched with the girth of the ridge between the common femoral trochanters, the width of the elastic band 2 is 5mm, and the thickness of the elastic band is 2mm. The size of the snap ring 3 is 20 x 2 x 2mm and is used by adapting a 'pressurizing clamp'.
The use process of the fixing device provided by the utility model is shown in the attached figures 4-6;
the use of the instrument is based on intertrochanteric fracture of femur combined with bone fragments needing surgical reduction and fixation; wherein, fig. 4 is a positive position sheet, fig. 5 is a rear position sheet, and fig. 6 is a side view sheet.
After the distal and proximal femur fracture ends of intertrochanteric fracture are fixed by means of corresponding instruments (PFNA, intertan, etc.). First, the surgeon determines the location of the trochanteric bone fragments and other bone fragments that need to be fixed, explores the tissue environment in the vicinity thereof, and determines the points of penetration and exit. Then, the wire is guided by the wire guide into the insertion point and then out of the exit point, and it is noted that the wire passing paths of the two sets of instruments (30 cm and 50 cm) are respectively close to the upper end and the lower end of the small rotor. Then, the wire end of the wire-elastic band is inserted into the wire guide threading end, and the wire 1 is pushed along the inside of the wire guide to thread out from the threading end, the wire guide is removed, and the wire is completely cut off from the wire-elastic band joint. The band is then pulled so that the mid-point of the band 2 is approximately at the position of the fragment and the non-snap ring end of the band 2 is passed through another tunnel in the snap ring 3 and temporarily fixed. Then, the doctor of the main knife evaluates the quality of resetting and fixing the bone fragments by the elastic band 2 and evaluates whether the adjustment is needed; then, intraoperative perspective validation evaluation is performed. Then, wait to restore to the throne, the fixed effect is good, and the doctor of main knife confirms no mistake back, uses the pressurization pincers to fix the snap ring 3 pressurization in the intersection at 2 both ends of elastic band to whether firm is surveyed, cut off elastic band 2 at this moment and become the ring after, stretch out two terminal outside the ring, and read it, tie up the numerical value promptly for annular girth: larger values-smaller values.
The foregoing is illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention in any way or in any way, and it will be understood by those skilled in the art that various modifications can be made without departing from the scope of the invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (8)
1. A device for fixing bone fragments of intertrochanteric fractures of the femur, comprising 2 strip-like fixtures; the strip-shaped fixture comprises a steel wire used for matching with a steel wire guider to penetrate through soft tissues around bone fragments and an elastic band connected with one end of the steel wire and used for bundling the bone fragments; one end of the elastic band far away from the steel wire is provided with a snap ring which is used for connecting the two ends of the elastic band and is fixed on the periphery of the femur in an annular shape.
2. The device of claim 1, wherein the band is graduated along a length of the band.
3. The device for fixing intertrochanteric fracture bone fragments of femur according to claim 1, wherein the snap ring is formed into a hollow two-layer cavity structure with two open ends, and a space for passing through the elastic band is respectively arranged in two cavities of the two-layer cavity structure; the inner side wall of the cavity is provided with teeth for closing the cavity and clenching the elastic belt.
4. The device of claim 3, wherein the snap ring is a hollow square.
5. The device of claim 1, wherein the length of the elastic band of the 2 band-shaped fixtures is 30cm and 50cm, respectively.
6. The device of claim 1, wherein said elastic band is made of a non-absorbable elastic material and has an elastic modulus of 533MPa.
7. The device of claim 1, wherein the elastic band has a width of 5mm and a thickness of 2mm.
8. The device of claim 1, wherein the wire has a length of 30cm and a diameter of 1.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865183.3U CN218106022U (en) | 2022-04-13 | 2022-04-13 | Device for fixing bone fragments of intertrochanteric fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865183.3U CN218106022U (en) | 2022-04-13 | 2022-04-13 | Device for fixing bone fragments of intertrochanteric fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218106022U true CN218106022U (en) | 2022-12-23 |
Family
ID=84493413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220865183.3U Active CN218106022U (en) | 2022-04-13 | 2022-04-13 | Device for fixing bone fragments of intertrochanteric fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218106022U (en) |
-
2022
- 2022-04-13 CN CN202220865183.3U patent/CN218106022U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220409251A1 (en) | Sternum fixation device and method | |
| Fielding et al. | Biomechanical characteristics and surgical management of subtrochanteric fractures | |
| US7799061B2 (en) | Orthopedic plate | |
| US9517097B2 (en) | Low-profile, high tension mesh plate for subcutaneous fracture fixation | |
| US10631896B2 (en) | Elongated pin for an external modular fixation system for temporary and/or permanent fixation applications and external modular fixation system | |
| Eagan et al. | Internal anterior fixators for pelvic ring injuries: do monaxial pedicle screws provide more stiffness than polyaxial pedicle screws? | |
| Wagner et al. | Biomechanical evaluation of two innovative locking implants for comminuted olecranon fractures under high-cycle loading conditions | |
| Midtgaard et al. | Biomechanical comparison of tension band wiring and plate fixation with locking screws in transverse olecranon fractures | |
| Kußmaul et al. | Biomechanical comparison of minimally invasive treatment options for Type C unstable fractures of the pelvic ring | |
| CN218106022U (en) | Device for fixing bone fragments of intertrochanteric fracture | |
| Boswell et al. | Mechanical characteristics of locking and compression plate constructs applied dorsally to distal radius fractures | |
| Hattori et al. | Prospects for bone fixation—development of new cerclage fixation techniques | |
| WO2017037733A1 (en) | External fixator for trauma management of limb | |
| Pelto-Vasenius et al. | Redisplacement after ankle osteosynthesis with absorbable implants | |
| Gugala et al. | Removal versus retention of orthopaedic trauma implants | |
| Auer et al. | Instrumentation and techniques in equine fracture fixation | |
| Jafarian et al. | Assessment of compression and strength of divergent screws mounted on miniplates for fixation of mandibular fractures: an in vitro experimental study | |
| Oitment et al. | Intramedullary cancellous screw fixation of simple olecranon fractures | |
| CN211750012U (en) | Orthopedic surgical instrument | |
| Yıldırım et al. | The results of delayed open reduction and internal fixation in chronic bony mallet finger injuries | |
| Tsai et al. | Biomechanical analysis of distal radius fractures using intramedullary Kirschner wires | |
| RU2749106C1 (en) | Method for osteosynthesis of femoral neck | |
| El-Sayed et al. | Treatment of Non-Comminuted Olecranon Fracture using Tension Band Wiring and Crossing Screws. | |
| Canavese et al. | Principles and overview of pediatric implantology in fracture management | |
| Andrew Carlson et al. | Distal Fibula Fracture Fixation: Biomechanical Evaluation of One Third Tubular vs. Anatomical Contoured Locking Plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |