Bending type driving-in regulator capable of holding multiple femur handlesTechnical Field
The invention relates to the technical field of medical appliances, in particular to a bending type driving adjuster capable of holding various femoral stems.
Background
The artificial hip joint replacement operation of the surgical implant is to use a femoral stem driver tool to knock a femoral stem into a femoral marrow cavity of a human body when a prosthesis is knocked, so that the femoral stem prosthesis replaces the femur of the human body.
In the existing femoral stem driver technology, when the femoral stem driver clamps a femoral stem prosthesis, the femoral stem driver is usually fixed in a threaded connection or clamping manner, time is wasted in threaded connection, whether a clamping piece is matched with a hole groove formed in the femoral stem prosthesis or not is needed to be considered in clamping, applicability is poor, each prosthesis needs to be matched with a corresponding driver in appearance, so that when prostheses of different specifications are used, drivers of different shapes need to be replaced, medical staff needs to check whether carried tools meet operation requirements in advance before each operation, operation preparation time is increased, if the medical staff is insufficient in preparation, bleeding amount in operation is increased, and the medical staff uses a straight rod-shaped femoral stem driver, and the femoral stem artificial prosthesis is implanted into a human femoral marrow cavity by utilizing a hammer driver tail part, however, rod-shaped femoral stem drivers cannot adapt to ergonomics, especially when an obese patient installs a femoral stem, the femoral stem cannot be completely aligned, the femoral stem is directly vertically and downwards to be implanted, so that the prosthesis cannot be installed in place.
Disclosure of Invention
The present invention is directed to a femoral stem bending driving adjuster capable of holding various femoral stems to solve the above-mentioned problems.
In order to solve the technical problems, the invention provides the following technical scheme: comprises a curved main body and a positioning mechanism, wherein the positioning mechanism is arranged on one side of the curved main body, the positioning mechanism comprises a limiting support plate, a positioning pin, a pull rod and a spring, the limiting support plate and the curved main body are integrally formed, one side of the curved main body is movably provided with the positioning pin through a buckle, one side of the curved main body is movably provided with the pull rod, the pull rod penetrates through the curved main body from the inside of the limiting support plate, the positioning pin is positioned above the pull rod, the positioning pin and one end, close to the curved main body, of the pull rod are fixedly provided with the spring, the spring is positioned inside the curved main body, the middle part of the curved main body is arc-shaped, the arc-shaped is arranged to conform to the design of an ergonomic structure and is used for avoiding subcutaneous fat of a human body when an in-operation device enters human tissues, the prosthesis is easier to install in place, meanwhile, the impact device is prevented from damaging human tissues, the positioning mechanism is used for positioning, clamping and fixing the prosthesis with different specifications in operation, the limiting support plate is used for expanding outwards when the pull rod moves to one side of the bent main body and is in contact with the inner wall of the clamping and fixing groove so as to lock the prosthesis, when the limiting support plate is combined inwards, the limiting support plate is separated from the inner wall of the clamping and fixing groove so as to release the prosthesis, the positioning pin is used for positioning the prosthesis with different specifications in operation and driving the prosthesis to rotate in operation, the pull rod is used for stretching and contracting under the action of the spring and the second stainless steel rope, the spring is used for buffering the force directly acted on the positioning pin and the pull rod by the first stainless steel rope and the second stainless steel rope, the first stainless steel rope and the second stainless steel rope are prevented from being damaged due to overlarge stress at a certain moment.
Further, a plurality of pins and a pin shaft are fixedly installed in the bent main body, a first cam and a second cam are rotatably installed on the outer side of the pin shaft, the pins are used for supporting the first stainless steel rope and the second stainless steel rope and guiding the first stainless steel rope and the second stainless steel rope to the position where the pin shaft is located, the pin shaft is used for installing the first cam and the second cam, the first cam is used for pulling the first stainless steel rope to zoom when rotating, locking and positioning pin stretching are achieved, the second cam is used for pulling the second stainless steel rope to zoom when rotating, and then a pull rod is pulled to act on a limiting support plate to lock the prosthesis.
Further, the one end that locating pin and pull rod are close to curved main part is fixed mounting respectively has first stainless steel rope and second stainless steel rope, first stainless steel rope and second stainless steel rope are close to locating mechanism's one end and are located the spring inside, the one end fixed mounting that locating mechanism was kept away from to the spring is on first stainless steel rope and second stainless steel rope, first stainless steel rope and second stainless steel rope guide first cam and second cam respectively through the pin, and first stainless steel rope is used for pulling the locating pin flexible, and second stainless steel rope is used for pulling the pull rod flexible.
Further, a limiting hole is formed in one side of the first cam and one side of the second cam, one ends, far away from the positioning mechanism, of the first stainless steel rope and the second stainless steel rope penetrate through the limiting hole, the limiting hole is used for allowing the first stainless steel rope and the second stainless steel rope to penetrate through the first cam and the second cam respectively, and when the first cam or the second cam is rotated, the first stainless steel rope or the second stainless steel rope is locked, and then the state of the positioning pin or the pull rod is locked.
Further, the adjuster still includes handle and femoral stem prosthesis, the one end of positioning mechanism is kept away from at curved main part to the handle, handle and curved main part integrated into one piece, the inboard rotation of handle is installed first elasticity knob and second elasticity knob, first elasticity knob is located second elasticity knob left side, open on one side of the handle has the through-hole, and the shape of handle sets up to oval, and the medical personnel of being convenient for take in the art, and first elasticity knob is used for adjusting the elasticity degree of first stainless steel rope at the rotation in-process, and second elasticity knob is used for adjusting the elasticity degree of second stainless steel rope at the rotation in-process, and the through-hole is used for allowing first stainless steel rope and second stainless steel rope to pass through.
Further, one end of the first stainless steel rope, which is close to the limiting hole, passes through the through hole and the second tightness knob inner cavity and is fixed in the first tightness knob inner cavity, and one end of the second stainless steel rope, which is close to the limiting hole, passes through the through hole and is fixed in the second tightness knob inner cavity.
Further, the two ends of the handle, the positioning mechanism and the bent main body are located on the same central axis, and the two ends of the handle, the positioning mechanism and the bent main body are located on the same central axis, so that when the handle is rotated, the rotation amplitude of the handle and the positioning mechanism is ensured to be consistent, torque is generated when the prosthesis is implanted into the femoral medullary cavity, and the prosthesis implantation precision is reduced.
Further, the femoral stem prosthesis is provided with a clamping fixing groove and a limiting groove, the limiting groove is formed in the edge of the clamping fixing groove, the clamping fixing groove is used for allowing a limiting support plate and a pull rod to enter, the prosthesis is fixed through the adjusting and positioning mechanism, and the limiting groove is used for being clamped in the limiting groove when the positioning pin stretches outwards, so that the prosthesis can be positioned conveniently during operation.
Further, the cross section diameter of the limiting support plate is smaller than the inner diameter of the clamping and fixing groove, the cross section long diameter of the locating pin is smaller than the minimum inner diameter of the limiting groove, the cross section diameter of the limiting support plate is smaller than the inner diameter of the clamping and fixing groove, the cross section diameter of the limiting support plate is used for ensuring that the pull rod and the limiting support plate can jointly and randomly enter the clamping and fixing groove, further, locking of prostheses of different specifications is achieved, the cross section long diameter of the locating pin is smaller than the minimum inner diameter of the limiting groove, and the cross section long diameter of the locating pin is used for achieving positioning of prostheses of different specifications in operation.
Further, the end part of the handle is provided with a baffle, the diameter of the cross section of the baffle is larger than that of the bone hammer, the baffle is used for avoiding that the handle slides down due to too small friction force generated between the hand and the surface of the handle when medical staff performs an operation, the operation precision is affected, the bone hammer can directly act on the surface of the baffle, and the prosthesis is compacted in the femoral marrow cavity.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the invention, the limiting support plate, the locating pin, the pull rod, the first stainless steel rope and the second stainless steel rope are added, the femoral stem prosthesis is transversely fixed by pulling the locating pin through the first stainless steel rope, the limiting support plate is pushed to abut against the inner wall of the clamping fixing groove by pulling the pull rod through the second stainless steel rope, the femoral stem prosthesis is longitudinally fixed, looseness of the femoral stem prosthesis in the implantation process is avoided, the implantation effect is better, and the risk of operation failure is reduced.
2. According to the invention, the locating pin, the limiting groove, the first stainless steel rope and the first cam are added, the length of the first stainless steel rope is finely adjusted by pulling the first cam, the first stainless steel rope drives the locating pin to enter the inner cavity of the limiting groove to fix the femoral stem prosthesis, when the femoral stem prosthesis needs to be knocked, the bone in the femoral stem cavity is soft, the pull rod and the limiting support plate are required to be separated from the inside of the clamping limiting groove, at the moment, the locating pin fixes the femoral stem prosthesis, the implantation direction of the femoral stem prosthesis is ensured not to be changed, in addition, the femoral stem prosthesis is not damaged in the knocking process, the femoral stem prosthesis is suitable for the femoral stem prosthesis with different specifications, the applicability is strong, tools are not required to be replaced in the operation, the operation time is saved, and the bleeding amount in the operation is reduced.
3. The invention adds the curved main body, the curved structure of the curved main body accords with the ergonomic design, subcutaneous fat of human tissues can be avoided, the two ends of the handle, the positioning mechanism and the curved main body are positioned on the same central axis, and when the handle is rotated to adjust the femoral stem prosthesis, the movement track of the positioning mechanism and the movement track of the handle are ensured to be consistent, so that the femoral stem prosthesis is in a straightening state when the femoral stem prosthesis is knocked downwards, the condition that the patient prosthesis is not installed in place is avoided, and the success rate of the operation is further increased.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of a femoral stem curvedly driving adjuster of the present invention;
FIG. 2 is a schematic diagram of a front view of a femoral stem bending driving adjuster according to the present invention;
FIG. 3 is a schematic top view of a femoral stem curved driving adjuster according to the present invention;
FIG. 4 is a schematic side view of a femoral stem curved driving adjuster according to the present invention;
FIG. 5 is an enlarged schematic view of the device of FIG. 1 at A for holding a plurality of femoral stem curved driving adjusters in accordance with the present disclosure;
fig. 6 is an enlarged view of the structure of fig. 2B showing a device for holding a plurality of femoral stem bending driving adjusters according to the present invention.
In the figure, 1, a handle, 11, a first tightening knob, 12, a second tightening knob, 13, a through hole, 14, a baffle, 2, a bent main body, 21, a pin, 22, a pin shaft, 23, a first cam, 24, a second cam, 25, a limiting hole, 3, a positioning mechanism, 31, a limiting support plate, 32, a positioning pin, a pull rod, 34, a spring, 4, a first stainless steel rope, 5, a second stainless steel rope, 6, a femoral stem prosthesis, 61, a clamping fixing groove, 62 and a limiting groove.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, the present invention provides the following technical solutions: comprises a curved main body 2 and a positioning mechanism 3, wherein the positioning mechanism 3 is arranged on one side of the curved main body 2, the middle part of the curved main body 2 is arc-shaped, the arc-shaped is in accordance with the ergonomic structural design, the positioning mechanism is used for ensuring that the artificial body is easier to be arranged in place when an intraoperative impact device enters human tissues and avoiding subcutaneous fat of the human body, meanwhile, the impact device is prevented from damaging the human tissues, the positioning mechanism 3 is used for positioning, clamping and fixing artificial bodies with different specifications in the operation, the positioning mechanism 3 comprises a limiting support plate 31, a positioning pin 32, a pull rod 33 and a spring 34, the limiting support plate 31 is integrally formed with the curved main body 2, the limiting support plate 31 is used for being unfolded outwards when the pull rod 33 moves towards one side of the curved main body 2, is abutted against the inner wall of a clamping and fixing groove 61 so as to lock the artificial body, and when the limiting support plate 31 is combined inwards, the fixing device is separated from the inner wall of the clamping and fixing groove 61 to release the prosthesis, one side of the bent main body 2 is movably provided with a locating pin 32 through a buckle, the locating pin 32 is used for locating the prosthesis with different specifications in the operation and driving the prosthesis to rotate in the operation, one side of the bent main body 2 is movably provided with a pull rod 33, the pull rod 33 is used for stretching movement under the action of a spring 34 and a second stainless steel rope 5, the pull rod 33 penetrates through the bent main body 2 from the inside of the limiting support plate 31, the locating pin 32 is positioned above the pull rod 33, the locating pin 32 is used for matching the pull rod 33 and the limiting support plate 31 to realize the transverse and longitudinal simultaneous support of the femoral stem prosthesis 6, the fixing effect is optimal, one ends of the locating pin 32 and the pull rod 33, which are close to the bent main body 2, are fixedly provided with a spring 34, the spring 34 is positioned inside the bent main body 2, the spring 34 is used for buffering the force applied by the first stainless steel rope 4 and the second stainless steel rope 5 directly acting on the positioning pin 32 and the pull rod 33, so that the first stainless steel rope 4 and the second stainless steel rope 5 are prevented from being damaged due to overlarge stress at a certain moment.
The inside of the bent main body 2 is fixedly provided with a plurality of pins 21 and a pin roll 22, the pins 21 are used for supporting the first stainless steel rope 4 and the second stainless steel rope 5 and guiding the second stainless steel rope 5 of the first stainless steel rope 4 to the position of the pin roll 22, the pin roll 22 is used for installing the first cam 23 and the second cam 24, the first cam 23 and the second cam 24 are rotatably installed outside the pin roll 22, the first cam 23 is used for pulling the first stainless steel rope 4 to zoom when rotating, the locking positioning pin 32 is achieved to stretch, the second cam 24 is used for pulling the second stainless steel rope 5 to zoom when rotating, and then the pull rod 33 is pulled to act on the limiting support plate 31 to lock the prosthesis.
The locating pin 32 and the one end that the pull rod 33 is close to the curved main part 2 are respectively fixed mounting have first nonrust steel rope 4 and second nonrust steel rope 5, and first nonrust steel rope 4 is used for pulling locating pin 32 flexible, and second nonrust steel rope 5 is used for pulling pull rod 33 flexible, and first nonrust steel rope 4 and the one end that second nonrust steel rope 5 is close to positioning mechanism 3 are located inside spring 34, and the one end that spring 34 kept away from positioning mechanism 3 is fixed mounting on first nonrust steel rope 4 and second nonrust steel rope 5, and first nonrust steel rope 4 and second nonrust steel rope 5 are led first cam 23 and second cam 24 respectively through pin 21.
One side of the first cam 23 and one side of the second cam 24 are provided with limiting holes 25, one ends of the first stainless steel rope 4 and the second stainless steel rope 5, which are far away from the positioning mechanism 3, penetrate through the limiting holes 25, the limiting holes 25 are used for allowing the first stainless steel rope 4 and the second stainless steel rope 5 to penetrate through the first cam 23 and the second cam 24 respectively, and when the first cam 23 or the second cam 24 is rotated, the first stainless steel rope 4 or the second stainless steel rope 5 is locked, and then the state of the positioning pin 32 or the pull rod 33 is locked.
The adjuster still includes handle 1 and femoral stem prosthesis 6, handle 1's shape sets up to oval, the medical personnel of being convenient for take in the art, handle 1 installs the one end that positioning mechanism 3 was kept away from in curved main part 2, handle 1 and curved main part 2 integrated into one piece, handle 1 inboard rotates installs first elasticity knob 11 and second elasticity knob 12, first elasticity knob 11 is located second elasticity knob 12 left side, first elasticity knob 11 is used for adjusting the elasticity degree of first stainless steel rope 4 in the rotation process, second elasticity knob 12 is used for adjusting the elasticity degree of second stainless steel rope 5 in the rotation process, handle 1 one side is opened there is through-hole 13, through-hole 13 is used for allowing first stainless steel rope 4 and second stainless steel rope 5 to pass through.
One end of the first stainless steel rope 4, which is close to the limiting hole 25, passes through the through hole 13 and the inner cavity of the second tightening knob 12 and is fixed in the inner cavity of the first tightening knob 11, and one end of the second stainless steel rope 5, which is close to the limiting hole 25, passes through the through hole 13 and is fixed in the inner cavity of the second tightening knob 12.
The two ends of the handle 1, the positioning mechanism 3 and the bent main body 2 are positioned on the same central axis, and the two ends of the handle 1, the positioning mechanism 3 and the bent main body 2 are positioned on the same central axis, so that when the handle 1 is rotated, the rotation amplitude of the handle 1 and the positioning mechanism 3 is ensured to be consistent, the torque generated when the prosthesis is implanted into the femoral medullary cavity is avoided, and the implantation precision of the prosthesis is reduced.
The femoral stem prosthesis 6 is provided with a clamping fixing groove 61 and a limiting groove 62, the clamping fixing groove 61 is used for allowing the limiting support plate 31 and the pull rod 33 to enter, the prosthesis is fixed through the adjusting and positioning mechanism 3, the limiting groove 62 is arranged at the edge of the clamping fixing groove 61, and the limiting groove 62 is used for being clamped in the limiting groove 62 when the positioning pin 32 stretches outwards, so that the prosthesis can be positioned in a convenient operation.
The diameter of the cross section of the limiting support plate 31 is smaller than the inner diameter of the clamping and fixing groove 61, the limiting support plate 31 and the pull rod 33 can jointly and randomly enter the clamping and fixing groove 61, then the prostheses of different specifications are locked, the diameter of the cross section of the positioning pin 32 is smaller than the minimum inner diameter of the limiting groove 62, and the limiting support plate is used for positioning prostheses of different specifications in operation.
The end of the handle 1 is provided with the baffle 14, the cross section diameter of the baffle 14 is larger than that of the bone hammer, the baffle 14 is used for avoiding that when a medical staff performs an operation, the handle 1 slides down due to too small friction force generated between the hand and the surface of the handle 1, the operation precision is affected, the bone hammer can directly act on the surface of the baffle 14, and the prosthesis is compacted in the femoral marrow cavity.
The working principle of the invention is that when in use, a user inserts a femoral stem prosthesis 6 at the outer side of a limit supporting plate 31 through a clamping fixing groove 61, then pulls a second cam 24 to finely adjust the length of a second stainless steel rope 5, the second stainless steel rope 5 in the adjusting process pulls a pull rod 33 to move towards one side of a bent main body 2, the pull rod 33 enters the inside of a cavity formed by a plurality of limit supporting plates 31 in the moving process, pushes the limit supporting plate 31 to move outwards to a position abutting against the inner wall of the clamping fixing groove 61, then pulls a first cam 23 to finely adjust the length of the first stainless steel rope 4, the first stainless steel rope 4 in the adjusting process drives a locating pin 32 to the inner cavity of the limit groove 62 to lock the prosthesis, then respectively tightens a first elastic knob 11 and a second elastic knob 12, the first stainless steel rope 4 and the second stainless steel rope 5 are in a tightening state, then drives the femoral stem prosthesis 6 to enter the inside of a human body tissue through the bent main body 2, as the bent main body 2 is in a 'bent structure', when the bent main body 2 enters the inner side of the human body 2 to abut against the inner wall of the clamping fixing groove 61, the first elastic knob 4 drives the femoral stem prosthesis to rotate to the inner side of the femoral stem prosthesis 6, the femoral stem prosthesis is prevented from damaging the inner side of the human body 1, the femoral stem prosthesis is prevented from being damaged by the rotating the elastic knob 1, the elastic knob 1 is prevented from being implanted in the same as the inner side of the human body 6, and the human body is fixed by the elastic body 1, the elastic body is prevented from being in the inner side of the compression groove 1, and the compression sleeve 1 is required, the femoral stem prosthesis 1 is implanted in the compression mechanism is prevented from being left at the inner side 1, and the inner side 1 is left by the human body is left in the human body is required, and the human body is left by the human body is and the human body is required, and the human body is placed in the human body is and the human body is left, and the human body is required, and the human is and the human body is placed, and the human body is and the human is and is left. Then the first cam 23 and the second cam 24 are pulled, at this time, the first stainless steel rope 4 and the second stainless steel rope 5 are in a loose state, and the first stainless steel rope 4 and the second stainless steel rope 5 in the loose state drive the positioning pin 32 and the pull rod 33 to be separated from the clamping fixing groove 61 and the limiting groove 62 respectively.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present invention, and the present invention is not limited thereto, but may be modified or substituted for some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.