CN115137451B - Releaser for cutting soft tissue around external bone fixing needle channel or fixing nail channel - Google Patents
Releaser for cutting soft tissue around external bone fixing needle channel or fixing nail channel Download PDFInfo
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- CN115137451B CN115137451B CN202211075819.5A CN202211075819A CN115137451B CN 115137451 B CN115137451 B CN 115137451B CN 202211075819 A CN202211075819 A CN 202211075819A CN 115137451 B CN115137451 B CN 115137451B
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/60—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like for external osteosynthesis, e.g. distractors, contractors
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Abstract
The application discloses a releaser for cutting soft tissues around an external bone fixing needle channel or a fixing nail channel, which relates to the technical field of medical instruments and comprises a scraper knife, wherein the cross section of the scraper knife is arranged in a bent manner, the inner side wall of the scraper knife is used for leaning against the fixing needle or the fixing nail part outside the soft tissues, and one end of the scraper knife is provided with a first cutting edge for cutting the soft tissues wound on the fixing needle or the fixing nail; the back knife is positioned at one end of the scraper knife close to the first cutting edge and positioned at the outer side of the scraper knife, and a second cutting edge used for cutting soft tissues wound on the fixing needle or the fixing nail and soft tissues at one side of the fixing needle or the fixing nail is arranged at one end of the back knife; the edge surface of the first blade inclines towards the inner side of the scraper knife; or the blade surface of the first blade inclines towards the outer side of the scraper knife; or the two blade surfaces of the first blade incline towards the inner side and the outer side of the shovel blade respectively. The external bone fixation device has the effects of improving the efficiency and safety of external bone fixation operations and reducing scars after healing.
Description
Technical Field
The application relates to the technical field of medical instruments, in particular to a loosening device for cutting soft tissues around an external bone fixing needle channel or a fixing nail channel.
Background
The external fixation of bones is a treatment means for reducing and fixing fractured ends by using an external fixing frame, needs to use external fixation needles or fixing nails, and is also known as Kirschner wires in medicine. When the external bone fixation operation is performed, different fixing needles or fixing nails need to penetrate through soft tissues to be respectively connected with the far end and the near end of a fracture part, then the different fixing needles or fixing nails exposed out of the skin are connected with each other through a connecting rod and a fixing support, and the bone is drawn through the fixing needles or fixing nails, so that the purposes of reconstructing the bone and correcting deformity are achieved.
Generally, a fixing needle or a fixing nail is drilled and fixed on a bone in a rotating mode, and the fixing needle or the fixing nail and the bone are fixed in two modes, wherein one mode is that the fixing needle or the fixing nail penetrates through the bone, and two ends of the fixing needle or the fixing nail are exposed and used for being connected and fixed with a fixing support; the other is that the front end of the fixing needle or the fixing nail is drilled into the bone for fixing, and the tail end is exposed and used for being connected and fixed with the fixing bracket. The process of fixing the fixing needle or the fixing nail on the bone can produce tissue debris, and the tissue fluid can ooze simultaneously, for can be with tissue debris and tissue fluid discharge fast, the operator often will use conventional scalpel blade to the soft tissue around the fixing needle or the fixing nail cut.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the process that the fixing needle or the fixing nail penetrates through soft tissues, the soft tissues around the needle hole can wind and wrap the fixing needle or the fixing nail to block the insertion of the fixing needle or the fixing nail, so that the time of the external bone fixation operation is prolonged. In order to facilitate the insertion of the fixing needle or the fixing nail, an operator can use a conventional scalpel blade to perform loosening cutting on soft tissues around the fixing needle or the fixing nail along the length direction of the fixing needle or the fixing nail, and the operator is difficult to master the cutting accuracy of the scalpel blade, so that poor cutting loosening effect, poor cut alignment and large cut width are caused. The irregular width of the incision not only increases the risk of infection after the operation of the patient and the healing time of the incision after the operation, but also can lead the incision of the patient to leave obvious scars after healing. In order to improve the loosening effect and the incision quality, an operator often prolongs the operation time, and then increases the operation risk.
Disclosure of Invention
In order to solve the problems of long time of external bone fixation operation, infection risk of patients after operation and obvious postoperative scars caused by poor loosening quality of a surgical blade, the application provides a loosening device for cutting soft tissues around an external bone fixation needle channel or a fixation nail channel.
The utility model provides a releaser for cutting bone external fixation needle way or fixed nail way surrounding soft tissue adopts following technical scheme:
a releaser used for cutting soft tissues around the external bone fixing needle channel or the fixing nail channel, comprises that
The cross section of the scraper knife is arranged in a bent mode, the inner side wall of the scraper knife is used for enabling the fixing needle or the fixing nail outside the soft tissue to lean against, and one end of the scraper knife is provided with a first cutting edge used for cutting the soft tissue wound on the fixing needle or the fixing nail;
the back knife is positioned at one end of the scraper knife close to the first cutting edge and positioned at the outer side of the scraper knife, and a second cutting edge used for cutting soft tissues wound on the fixing needle or the fixing nail and soft tissues at one side of the fixing needle or the fixing nail is arranged at one end of the back knife;
the blade surface of the first blade is inclined towards the inner side of the shovel blade;
or the blade surface of the first blade inclines towards the outer side of the scraper knife;
or the two blade surfaces of the first blade incline towards the inner side and the outer side of the shovel blade respectively.
By adopting the technical scheme, the scraper knife part is a handheld part, so that the scraper knife has certain thickness and the blade surface of the first blade inclines towards the inner side of the scraper knife in order to improve the hardness and the service life of the scraper knife; or the blade surface of the first blade inclines towards the outer side of the scraper knife; or the two blade surfaces of the first blade incline towards the inner side and the outer side of the scraper knife respectively, so that when the scraper knife is thick, the first blade can still cut off soft tissues quickly, and the cutting efficiency of the loosening device is improved.
When carrying out external fixation of bone operation, need penetrate the soft tissue and insert the bone with fixing pin or staple rotation in, fixing pin or staple are at the rotatory in-process that penetrates the soft tissue, with the inside wall of spiller and the fixing pin or the staple laminating in the rotation, and the inside wall of spiller can lead spacing to fixing pin or staple in the rotation for fixing pin or staple rotation are more stable.
Simultaneously the spiller can lean on comparatively steadily on fixed needle or staple through the inside wall of its crooked setting, along with the rotatory insertion of fixed needle or staple, promotes the spiller in step, and the spiller drives back of the body sword synchronous motion, and the cutting is stabilized to the soft tissue of winding on fixed needle or staple to first cutting edge on the spiller for fixed needle or staple can pierce through the soft tissue fast and insert on the bone. The second cutting edge on the back of the body sword can be with the soft tissue of winding on fixed needle or the staple and the soft tissue of fixed needle or staple one side steadily open, the rotatory insertion of the fixed needle of not only being convenient for or the staple, also make simultaneously fixed needle or staple insert the incision that the produced tissue piece of in-process and the tissue fluid accessible of soft tissue cut out fast discharge at the rotatory incision that inserts, thereby reach the mesh that improves external fixation of bone surgery efficiency, reduce the infection risk of patient's postoperative.
The transversal crooked design of personally submitting of spiller for the spiller can stably lean on fixed needle or staple, and then makes the incision that first cutting edge and second cutting edge cutting formed level and smooth, effectively reduces the postoperative infection risk, and furthest's reduction postoperative scar satisfies the patient to the demand of pleasing to the eye degree.
Optionally, the angle value of the edge angle of the second blade is alpha, and alpha is more than or equal to 20 degrees and less than or equal to 60 degrees;
the angle value of the tool nose inclination angle of the second cutting edge is beta, and beta is more than or equal to 25 degrees and less than or equal to 150 degrees;
the width value of the back knife is gamma, and the gamma is more than or equal to 1mm and less than or equal to 5mm;
the angle value of the bending radian of the scraper knife is delta, and delta is more than or equal to 60 degrees and less than or equal to 180 degrees.
Through adopting above-mentioned technical scheme, the angle value alpha of second cutting edge angle is between 20 ~60 for the second cutting edge can not lead to its blade intensity to be low because of too sharp, thereby leads to the life of second cutting edge to be short, also can not be difficult to cut the soft tissue because the second cutting edge is too blunt simultaneously.
The angle value beta of the inclination angle of the knife tip of the second knife edge is 25-150 degrees, and the width value gamma of the back knife is 1-5 mm, so that the length of the cutting edge of the second knife edge of the back knife is moderate, the knife tip of the second knife edge is prevented from being too sharp as much as possible, the soft tissue is easily scratched and punctured, the difficulty of the external bone fixation operation is reduced, and the efficiency of the external bone fixation operation is improved.
The radian value delta of the scraper knife ranges from 60 degrees to 180 degrees, so that the machining and forming difficulty of the scraper knife is low, and the machining precision is higher.
Optionally, the first cutting edge is flush with the second cutting edge;
or the first blade is arranged to protrude out of the second blade;
or the second blade is arranged to protrude from the first blade.
By adopting the technical scheme, the first cutting edge and the second cutting edge are arranged in parallel and level and can be used for synchronously cutting flat soft tissues, so that the incision depths of the first cutting edge and the second cutting edge are the same, the condition that the healing time of two wounds is different due to the different depths of the two incisions is avoided as much as possible, and the postoperative infection risk of a patient is further increased; the first blade protrudes out of the second blade and can be used for cutting soft tissues at the ankle joint, and the height difference between the first blade and the second blade can be used for avoiding the protruded bone part of the ankle joint, so that the second blade is prevented from scratching the bone on one side of the fixing needle or the fixing nail as far as possible; the second cutting edge protrudes out of the first cutting edge and can be used for cutting the soft tissue of the muscle part, so that the second cutting edge firstly cuts the soft tissue of the muscle, the fixing needle or the fixing nail and the first cutting edge can easily penetrate through the muscle, and the purpose of improving the efficiency of the external bone fixation operation is achieved.
Optionally, the second blade edge angle α ranges from 30 ° to 40 °.
By adopting the technical scheme, the value range of the second cutting edge angle alpha is 30-40 degrees, so that soft tissues can be cut off rapidly by the second cutting edge under the condition of ensuring the strength of the second cutting edge, and the purpose of improving the efficiency of the external bone fixation operation is achieved.
Optionally, the inclination angle β of the second blade nose ranges from 45 ° to 90 °.
Through adopting above-mentioned technical scheme, the value range of second cutting edge knife tip inclination beta is 45 ~90 for the second cutting edge knife tip can not lead to easy fish tail soft tissue because of too sharp protrusion, and then makes the incision that the cutting of second cutting edge formed level, is favorable to the quick discharge of the tissue piece in the soft tissue and tissue liquid, effectively reduces postoperative infection risk, furthest's reduction postoperative scar satisfies the demand of patient to pleasing to the eye degree.
Optionally, the value range of the bending radian delta of the scraper knife is 90-120 degrees.
By adopting the technical scheme, the value range of the radian delta of the scraper knife is 90-120 degrees, and the scraper knife can be adapted to a fixing needle or a fixing nail with a large diameter size, and meanwhile, the machining forming difficulty of the scraper knife is low, and the machining precision is higher.
Optionally, the back knife is fixedly connected to the peripheral wall of the scraper knife, and the back knife is located on an angular bisector of the curved arc where the scraper knife is located.
Through adopting above-mentioned technical scheme, back of the body sword fixed connection is on the periphery wall of spiller for fixed needle or staple can not be difficult to because of the back of the body sword and stably laminate the lean on with the spiller inside wall, and the back of the body sword is located the angular bisector of spiller place crooked circular arc simultaneously, makes the incision that first sword cutting soft tissue formed be the symmetry setting along the incision that second sword cutting soft tissue formed, makes the incision whole level and smooth pleasing to the eye, satisfies the demand of patient to pleasing to the eye degree.
Optionally, one side of the scraper knife is fixedly connected with an arc-shaped piece, the back knife is fixedly connected to one side of the arc-shaped piece far away from the scraper knife, and the bending direction of the arc-shaped piece is opposite to that of the scraper knife.
Through adopting above-mentioned technical scheme, the arc piece is fixed the one side at the spiller with the back of the body sword, and the crooked direction of arc piece is opposite with the crooked direction of spiller, can not receive the interference of back of the body sword when making fixed needle or staple lean on the spiller inside wall, make the spiller can stably lean on fixed needle or staple, thereby make the incision of pine ware level and smooth, effectively reduce postoperative infection risk, furthest's reduction postoperative scar satisfies the demand of patient to pleasing to the eye degree.
Optionally, a connecting structure for connecting a handle is arranged at one end of the scraper knife, which is far away from the first cutting edge.
Through adopting above-mentioned technical scheme, connection structure's setting is convenient for install the handle fast and tear open on the spiller for it is more convenient when operator uses the spiller.
Optionally, a protective structure is arranged at one end of the scraper knife, which is far away from the first cutting edge.
Through adopting above-mentioned technical scheme, protective structure's setting has effectively avoided the spiller to keep away from the one end of first cutting edge and has produced the fish tail to the operator to make the operator can use the spiller safely and high-efficiently to carry out the external bone fixation operation.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the cross section of the scraper knife is in a bent design, so that the scraper knife can stably lean against the fixing needle or the fixing nail, further, a cut formed by cutting the first cutting edge and the second cutting edge is smooth, the risk of postoperative infection is effectively reduced, postoperative scars are reduced to the maximum extent, and the requirement of a patient on attractiveness is met;
2. the value range of the cutting angle alpha of the second cutting edge is 30-40 degrees, so that the second cutting edge can quickly cut off soft tissues under the condition of ensuring the strength of the second cutting edge, and the aim of improving the external bone fixation surgery efficiency is fulfilled;
3. the value range of the second cutting edge angle alpha is 30-40 degrees, so that the second cutting edge can cut off soft tissues quickly under the condition of ensuring the strength of the second cutting edge, and the purpose of improving the efficiency of the external bone fixation operation is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a loosening device for cutting soft tissue around an external bone fixing needle channel or a fixing nail channel according to an embodiment of the present application.
Fig. 2 is a three-dimensional view of a releaser for cutting soft tissue around an external bone fixation needle track or fixation nail track according to one embodiment of the present application.
Fig. 3 is a partial structural schematic view of a first blade and a blade according to a first embodiment of the present application.
Fig. 4 is a schematic view of the overall structure of the scraper knife and the back knife when they are connected according to the first embodiment of the present application.
Fig. 5 is a schematic structural diagram of an overall releaser for cutting soft tissues around an external bone fixation needle channel or a fixation nail channel in the second embodiment of the present application.
Reference numerals: 1. a scraper knife; 2. a first blade; 3. carrying out back cutting; 4. a second blade; 5. an arc-shaped sheet; 6. a connecting structure; 7. a protective structure; 8. riveting holes; 9. a tenon.
Detailed Description
The present application is described in further detail below with reference to figures 1-5.
The first embodiment is as follows:
the embodiment of the application discloses a loosening device for cutting soft tissues around an external bone fixing needle channel or a fixing nail channel. Referring to fig. 1 and 2, the releaser for cutting soft tissues around an external bone fixation needle channel or a fixation nail channel comprises a scraper knife 1 and a back knife 3 fixedly connected with the scraper knife 1, wherein the cross section of the scraper knife 1 is in a bent arrangement, the cross section of the scraper knife 1 can be in a smooth arc shape, and also can be a polygonal curved surface which is approximately in an arc shape and is formed by bending at intervals along the width direction of the scraper knife 1, one end of the scraper knife 1 is provided with a first cutting edge 2, and the other end of the scraper knife 1 is provided with a protective structure 7. The back knife 3 is positioned at one end of the shovel knife 1 close to the first knife edge 2, the back knife 3 is positioned at the outer side of the shovel knife 1, and a second knife edge 4 is arranged at one end of the back knife 3 far away from the protective structure 7.
Referring to fig. 3, in order to facilitate an operator to rapidly cut soft tissue by using the blade 1, the blade 1 and the first blade 2 are integrally formed, and the blade 1 and the first blade 2 are made of the same material. The material of the scraper knife 1 may be stainless steel, titanium alloy, or hard plastic, and in the embodiment of the present application, both the scraper knife 1 and the first blade 2 are made of titanium alloy. The titanium alloy has light weight and high hardness, and is convenient for improving the efficiency of the external bone fixation operation and the effect of the external bone fixation operation.
When the first blade 2 is integrally connected with the scraper knife 1:
in one possible embodiment, referring to fig. 3-a, the facet of the first cutting edge 2 is inclined towards the inside of the blade 1.
In another possible embodiment, referring to fig. 3-b, the facet of the first cutting edge 2 is inclined towards the outside of the blade 1.
In other possible embodiments, referring to fig. 3-c, the two edge faces of the first blade edge 2 are inclined towards the inside and the outside of the blade 1, respectively.
For the processing degree of difficulty that reduces first cutting edge 2, ensure the cutting accuracy of first cutting edge 2 simultaneously, in this application embodiment, the blade face slope of first cutting edge 2 points to the outside of spiller 1.
Referring to fig. 2, the angle value δ of the arc of the cutting edge 1 is 60 ° to 180 °, for example, the value of δ may be 60 °, 70 °, 90 °, 105 °, 120 °, 140 °, 180 °, and the like, specifically, the value of δ is 90 ° to 120 °, and in the embodiment of the present application, the value of δ is 120 °.
When an operator performs an external bone fixation operation, the fixing needle or the fixing nail can stably lean against the inner side wall of the shovel blade 1, so that the cutting edge of the first blade 2 is attached to the peripheral wall of the fixing needle or the fixing nail. With the continuous insertion of the scraper knife 1, the first blade 2 can rapidly cut off soft tissues wound on the fixing needle or the fixing nail, and reduce the winding and adhesion of the soft tissues on the fixing needle or the fixing nail, so that the fixing needle or the fixing nail can rapidly rotate to penetrate through the soft tissues and be inserted into the bone.
When the operator is holding scraper knife 1 and carrying out the soft tissue cutting, scraper knife 1 is provided with directional oneself of one end of protective structure 7, and protective structure 7's setting can reduce the risk that the operator is by 1 tip fish tail of scraper knife. Referring to fig. 1 and fig. 2, in this application embodiment, protective structure 7 is the fillet transition structure of setting at spiller 1 tip, and in other embodiments, protective structure 7 still can be for the cover establish at the rubber sleeve of spiller 1 tip, also can be for bonding the sponge layer at spiller 1 tip, and whatever can realize reducing the structure that spills risk to the operator of spiller 1 tip all can.
In order to facilitate the operator to cut soft tissue by holding the scraper knife 1, referring to fig. 1 and 2, one end of the scraper knife 1 provided with the protective structure 7 is provided with a connecting structure 6 for connecting a handle, in the embodiment of the present application, the connecting structure 6 is a connecting hole penetrating through the scraper knife 1, and the connecting hole may be one or multiple. For the installation efficiency of improvement handle and the stability of handle installation, the connecting hole is provided with two, and two connecting holes of handle accessible are connected on spiller 1 through welding the stable connection of riveting technology.
The material of back knife 3 can be the same as, also can be different from the material of spiller 1, and in this application embodiment, the material of back knife 3 is the same as the material of spiller 1. The second blade 4 and the back knife 3 are made of the same material and are integrally formed with the back knife 3, and the thickness of one end, close to the back knife 3, of the second blade 4 is the same as that of the back knife 3.
Because the back knife 3 synchronously cuts the soft tissue in the process of cutting the soft tissue by the shovel knife 1, in order to make the incision of the back knife 3 smooth, reduce the risk of postoperative infection, reduce postoperative scars to the maximum extent and meet the requirement of a patient on aesthetic degree, referring to fig. 2, the angle value alpha of the edge angle of the second cutting edge 4 is 20 degrees to 60 degrees, for example, the value of alpha can be 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees and the like, specifically, the value of alpha is 30 degrees to 40 degrees, and in the embodiment of the application, the value of alpha is 30 degrees.
Referring to fig. 2, the width value γ of the back knife 3 is 1mm to 5mm, for example, γ may be 1mm, 2mm, 3mm, 4mm, 5mm, and the like, specifically, γ is 2mm to 3mm, and in the embodiment of the present application, γ is 3mm.
Referring to fig. 2, the angle value β of the tip inclination angle of the second cutting edge 4 is between 25 ° and 150 °, for example, the value of β may be 25 °, 30 °, 45 °,60 °, 90 °, 115 °, 130 °, 150 °, and the like, specifically, the value of β is between 45 ° and 90 °, and in the embodiment of the present application, the value of β is 45 °.
The fixed connection mode of the back knife 3 and the scraper knife 1 can be welding, riveting or welding-riveting combination, and all the connection modes can be that the back knife 3 can be stably fixed on the scraper knife 1. In order to improve the connection stability between the backing knife 3 and the blade 1, referring to fig. 4, in the embodiment of the present application, the backing knife 3 is fixedly connected to the blade 1 in a welding and riveting manner, and the backing knife 3 is fixedly connected to an angular bisector of a curved arc where the blade 1 is located.
Referring to fig. 3 and 4, a plurality of riveting holes 8 are formed in one end, close to the first cutting edge 2, of the blade 1, the number of the riveting holes 8 may be one, two, three or four, in this embodiment, four riveting holes 8 are provided, and the four riveting holes 8 are arranged at equal intervals along the length direction of the blade 1. One side of the back knife 3 is welded with a tenon 9 which is riveted and matched with the riveting hole 8. When the back knife 3 is installed on the scraper knife 1, the tenon 9 is riveted in the riveting hole 8, and then the tenon 9 is welded and fixed in the riveting hole 8, so that the back knife 3 is stably connected with the scraper knife 1.
After the back knife 3 is connected with the shovel knife 1:
in one possible embodiment, referring to fig. 4-a, the second cutting edge 4 is arranged protruding from the first cutting edge 2.
In another possible embodiment, referring to fig. 4-b, the first cutting edge 2 is arranged flush with the second cutting edge 4.
In other possible embodiments, referring to fig. 4-c, the first cutting edge 2 is arranged protruding the second cutting edge 4.
The implementation principle of the loosening device for cutting soft tissues around the external bone fixing needle channel or the fixing nail channel in the first embodiment of the application is as follows: when carrying out external fixation of bone operation, earlier with during fixed needle or the staple rotation inserts the soft tissue, with the first cutting edge 2 butt of spiller 1 on the soft tissue simultaneously to make the inside wall of spiller 1 lean on and laminate on fixed needle or staple.
Along with the rotary insertion of the fixing needle or the fixing nail, the scraper knife 1 is synchronously pushed, the scraper knife 1 drives the back knife 3 to synchronously move, and the first knife edge 2 on the scraper knife 1 cuts and cleans soft tissues wound on the fixing needle or the fixing nail, so that the fixing needle or the fixing nail can quickly penetrate through the soft tissues and is inserted into the bone. The second cutting edge 4 on the back knife 3 can cut open the soft tissue wound on the fixing needle or the fixing nail and the soft tissue on one side of the fixing needle or the fixing nail, thereby not only facilitating the rotary insertion of the fixing needle or the fixing nail, but also enabling the tissue debris and the tissue fluid in the soft tissue to be quickly discharged through the cuts cut by the first cutting edge 2 and the second cutting edge 4.
Because the incision that first cutting edge 2 and second cutting edge 4 cutting formed is level and smooth, not only improved the efficiency of external bone fixation operation, also effectively reduced postoperative infection risk simultaneously, furthest's reduction postoperative scar satisfies the demand of patient to pleasing to the eye degree.
The second embodiment is different from the first embodiment in that: the fixed connection mode of the backing knife 3 and the shovel knife 1. Referring to fig. 5, in the present embodiment, an arc-shaped blade 5 is fixedly connected to one side of the blade 1, and the arc-shaped blade 5 is located at one end of the blade 1 close to the first blade edge 2. The arc-shaped piece 5 is made of the same material as the scraper knife 1, and the arc-shaped piece 5 and the scraper knife 1 are integrally formed. The bending direction of the arc-shaped sheet 5 is opposite to that of the scraper knife 1, and one side of the back knife 3 and one side of the arc-shaped sheet 5, which is far away from the scraper knife 1, are integrally formed.
In one possible embodiment, referring to fig. 5-a, the arc-shaped blade 5 is attached to one side of the blade 1 in a left-handed arrangement.
In another possible embodiment, referring to fig. 5-b, the arc-shaped blade 5 is provided right-hand on one side of the blade 1.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a ware is separated to pine that is used for cutting external bone fixation needle way or fixed nail way surrounding soft tissue which characterized in that: comprises that
The cross section of the scraper knife (1) is arranged in a bent mode, the inner side wall of the scraper knife is used for enabling a fixing needle or a fixing nail outside soft tissues to lean against, and one end of the scraper knife is provided with a first knife edge (2) used for cutting the soft tissues wound on the fixing needle or the fixing nail;
the back knife (3) is positioned at one end, close to the first knife edge (2), of the shovel knife (1) and positioned on the outer side of the shovel knife (1), and a second knife edge (4) used for cutting soft tissues wound on the fixing needle or the fixing nail and soft tissues on one side of the fixing needle or the fixing nail is arranged at one end of the back knife;
the blade surface of the first blade (2) inclines towards the inner side of the shovel blade (1);
or the edge surface of the first blade (2) inclines towards the outer side of the shovel blade (1);
or two blade surfaces of the first blade (2) incline towards the inner side and the outer side of the shovel blade (1) respectively;
the shovel blade (1) is pushed synchronously along with the rotary insertion of the fixing needle or the fixing nail, the first blade (2) cuts and cleans soft tissues wound on the fixing needle or the fixing nail, and the second blade (4) cuts the soft tissues wound on the fixing needle or the fixing nail and the soft tissues on one side of the fixing needle or the fixing nail.
2. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 1, wherein:
the angle value of the edge angle of the second cutting edge (4) is alpha, and alpha is more than or equal to 20 degrees and less than or equal to 60 degrees;
the angle value of the tool nose inclination angle of the second cutting edge (4) is beta, and beta is more than or equal to 25 degrees and less than or equal to 150 degrees;
the width value of the back knife (3) is gamma, and gamma is more than or equal to 1mm and less than or equal to 5mm;
the angle value of the bending radian of the scraper knife (1) is delta, and delta is more than or equal to 60 degrees and less than or equal to 180 degrees.
3. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 1, wherein:
the first cutting edge (2) and the second cutting edge (4) are arranged in parallel;
or the first blade (2) is arranged to protrude the second blade (4);
or the second blade (4) is arranged to protrude from the first blade (2).
4. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 2, wherein: the cutting angle alpha of the second cutting edge (4) ranges from 30 degrees to 40 degrees.
5. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 2, wherein: the value range of the tool nose inclination angle beta of the second cutting edge (4) is 45-90 degrees.
6. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 2, wherein: the value range of the bending radian delta of the scraper knife (1) is 90-120 degrees.
7. The device according to any one of claims 1 to 6, wherein the device comprises: the back knife (3) is fixedly connected to the peripheral wall of the scraper knife (1), and the back knife (3) is located on an angular bisector of a curved arc where the scraper knife (1) is located.
8. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to any one of claims 1-6, wherein: one side fixedly connected with arc piece (5) of spiller (1), back of the body sword (3) fixed connection in arc piece (5) are kept away from one side of spiller (1), the crooked direction of arc piece (5) with the crooked direction of spiller (1) is opposite.
9. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 1, wherein: one end of the scraper knife (1) far away from the first cutting edge (2) is provided with a connecting structure (6) for connecting a handle.
10. The debonder for cutting soft tissue around an external bone fixation needle tract or fixation nail tract according to claim 1, wherein: one end, far away from the first cutting edge (2), of the scraper knife (1) is provided with a protection structure (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211075819.5A CN115137451B (en) | 2022-09-05 | 2022-09-05 | Releaser for cutting soft tissue around external bone fixing needle channel or fixing nail channel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211075819.5A CN115137451B (en) | 2022-09-05 | 2022-09-05 | Releaser for cutting soft tissue around external bone fixing needle channel or fixing nail channel |
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| Publication Number | Publication Date |
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| CN115137451A CN115137451A (en) | 2022-10-04 |
| CN115137451B true CN115137451B (en) | 2022-11-29 |
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| CN202211075819.5A Active CN115137451B (en) | 2022-09-05 | 2022-09-05 | Releaser for cutting soft tissue around external bone fixing needle channel or fixing nail channel |
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| Country | Link |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6270501B1 (en) * | 1999-11-08 | 2001-08-07 | The Regents Of The University Of Michigan | Surgical method and apparatus and cannulated scalpel for use therein |
| US20080161845A1 (en) * | 2006-11-16 | 2008-07-03 | Mani, Inc. | Trocar |
| ES2279733B1 (en) * | 2006-11-27 | 2008-08-16 | Rudolf Morgenstern Lopez | DEVICE FOR ELIMINATION OF FABRIC IN ENDOSCOPIC OPERATIONS. |
| US20140323811A1 (en) * | 2013-04-30 | 2014-10-30 | Invuity, Inc. | Methods and apparatus for retracting tissue |
| US20160235431A1 (en) * | 2013-09-27 | 2016-08-18 | Release Medical, Inc. | Tissue incision device and method |
| CN104997554B (en) * | 2015-07-15 | 2018-06-15 | 湖州市妇幼保健院 | For the cutter of Hysterectomy |
| CN209236294U (en) * | 2018-06-05 | 2019-08-13 | 孙建峰 | Removal tool for replacement knee in arthroplasty |
| CN113633362B (en) * | 2021-08-10 | 2023-02-28 | 杭州市富阳中医骨伤医院 | Minimally invasive surgery tool for knee joint posterior cruciate ligament insertion fracture |
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| Publication number | Publication date |
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| CN115137451A (en) | 2022-10-04 |
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