CN217091032U - Minimally invasive extendable artificial prosthesis - Google Patents
Minimally invasive extendable artificial prosthesis Download PDFInfo
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- CN217091032U CN217091032U CN202122798844.3U CN202122798844U CN217091032U CN 217091032 U CN217091032 U CN 217091032U CN 202122798844 U CN202122798844 U CN 202122798844U CN 217091032 U CN217091032 U CN 217091032U
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Abstract
The utility model relates to a wicresoft can prolong artificial prosthesis, include: the defect section supporting prosthesis is internally provided with a slideway extending along the longitudinal direction; the extension sleeve is coaxially arranged in a slide way of the defect section support prosthesis, a sliding pair is formed by the extension sleeve and the slide way, and an internal thread is processed on the inner wall of the extension sleeve; the main lead screw is screwed in the extension sleeve; the transmission mechanism is arranged in a slide way of the defect segment supporting prosthesis below the extension sleeve, the output end of the transmission mechanism is connected with the main retracting lead screw, and the transmission mechanism is configured to transmit the rotation torque to the main retracting lead screw so as to drive the main retracting lead screw to rotate; and the power input part is connected with the input end of the transmission mechanism and is used for inputting the rotating torque to the transmission mechanism. The utility model discloses can realize the wicresoft extension, show and reduce the surgery incision and show the scope and reduce the infection risk, reduce the deep infection risk, alleviate the cicatrization, and prolong stable in structure reliably.
Description
Technical Field
The utility model relates to an artificial prosthesis, in particular to a minimally invasive extendable artificial prosthesis used for reconstruction after excision of skeletal tumors in the skeletal development stage of children and teenagers, and belongs to the technical field of medical instruments.
Background
Common primary malignant tumors of bone include osteosarcoma, ewing sarcoma, etc., and are better developed in children or adolescents, 80% of lesions involve diaphysis and metaphysis, which is also the position of epiphyseal plate (bone growth plate), and the epiphyseal plate is cut off simultaneously during tumor removal, resulting in the development of limbs on the operation side being affected, mainly manifested as shortening of limb length relative to the healthy side. For adolescents, the growth of the distal femoral and proximal tibial epiphyses accounts for 70% of the length of the overall lower limb elevation development.
For the above reasons, when a bone tumor patient of a small age or a bone at a developmental stage is subjected to tumor resection and reconstruction by a conventional tumor type (defect type) artificial joint device, the problem of unequal limb lengths is encountered after the operation. And the smaller the age, the more growth potential is lost, after which the unequal limbs will be more severe. The patients with the disease have gradually prolonged life cycle, and complications such as limb inequality and lameness caused by the reconstruction of the tumor section amputated prosthesis are increased day by day. At present, the problem that children bone primary tumor patients face unequal limb lengths after limb protection operations is common, and unequal limb lengths after limb protection operations of children gradually become a problem to be solved urgently in the field.
The problem can be better solved by the extendable prosthesis, but the extendable prosthesis widely adopted at present needs to be extended through a surgical operation every time, namely, the extendable prosthesis is invasive, the infant needs to be subjected to the operation every half year, the invasive operation is repeated, the infection risk around the deep prosthesis is increased, and the infection is often catastrophic; and the single-time extension length is limited, generally 1-2cm, mainly because the vascular nerve can not endure the traction with longer length, and the extension structure has the problems of withdrawal and the like, and besides the infection probability is increased, the serious cicatrization of tissues can be brought by a plurality of operations. This frequent surgical procedure will last ten years or even longer, and the pain and economic burden on the patient are very severe.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention provides a minimally invasive extendable artificial prosthesis for reconstruction after resection of skeletal tumor in skeletal development stage of children and teenagers.
In order to achieve the purpose, the utility model adopts the following technical proposal:
in a first aspect, the present invention provides a minimally invasive extendable artificial prosthesis, comprising: the defect section supporting prosthesis is internally provided with a slideway extending along the longitudinal direction; the extension sleeve is coaxially arranged in the slideway of the defect section supporting prosthesis and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve; the main retracting screw rod is screwed in the extension sleeve in a threaded manner; the transmission mechanism is arranged in a slide way of the defect segment supporting prosthesis below the extension sleeve, the output end of the transmission mechanism is connected with the main retracting lead screw, and the transmission mechanism is configured to transmit rotation torque to the main retracting lead screw so as to drive the main retracting lead screw to rotate; and the power input part is connected with the input end of the transmission mechanism and is used for inputting the rotating torque to the transmission mechanism.
The minimally invasive extendable artificial prosthesis is characterized in that the power input part is a bolt or a transverse bevel gear with transverse threads machined thereon, and an output end of the power input part transversely penetrates through the defect section supporting prosthesis and then is connected with an input end of the transmission mechanism, so that the power input part is driven to transversely rotate to input rotary torque into the transmission mechanism.
The minimally invasive extendable artificial prosthesis preferably adopts a planetary gear transmission as the transmission mechanism, and the planetary gear transmission comprises: the lower end of the longitudinal rotating column is processed with longitudinal threads or is provided with a longitudinal bevel gear and is meshed with the output end of the power input part so as to convert the transverse torque of the power input part into the longitudinal torque of the longitudinal rotating column, and the upper end of the longitudinal rotating column forms a central gear; the gear ring is fixedly connected in the slideway of the defect section supporting prosthesis; a plurality of planetary gears engaged between the sun gear and the ring gear of the longitudinal rotary column; the planet carrier, with the lead screw fastening connection is led out to the owner, just the planet carrier is through a plurality of spliced pole respectively with each planetary gear is connected.
The minimally invasive extendable prosthesis preferably has a reduction ratio of 1: 3-1: 50.
Preferably, an anti-retraction mechanism is formed between the extension sleeve and the main retraction screw rod, namely the main retraction screw rod is a trapezoidal screw rod with a self-locking thread angle.
In a second aspect, the present invention provides a minimally invasive extendable artificial prosthesis, comprising: the defect section supporting prosthesis is internally provided with a channel extending along the longitudinal direction; the extension sleeve is coaxially arranged in the slideway of the defect section supporting prosthesis and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve; a retracting rotating rod which comprises a rotating rod section and a retracting driving section connected to one end of the rotating rod section, wherein the rotating rod section is assembled in a channel of the defect section supporting prosthesis in a circumferentially rotatable and longitudinally immovable manner, and the outer wall of the retracting driving section is provided with external threads and screwed in the extension sleeve; and the defect section extension prosthesis is connected to the free end of the extension sleeve and can synchronously move along with the extension sleeve.
Preferably, the retraction driving section is integrally connected to one end of the rotating rod section, and the diameter of the retraction driving section is larger than that of the rotating rod section, so as to form a T-shaped integrated structure.
Preferably, an anti-retraction mechanism is formed between the thread section of the extension sleeve and the retraction driving section of the retraction rotating rod, namely, the external thread of the retraction driving section adopts a trapezoidal thread with a self-locking thread angle.
Preferably, at least two guide grooves extending in the longitudinal direction are formed in the outer wall of the extension sleeve, correspondingly, at least two protruding ridges extending in the longitudinal direction are formed in the inner wall of the support prosthesis for the defect section, and the guide grooves in the extension sleeve are matched with the protruding ridges in the support prosthesis for the defect section so as to limit the rotation of the extension sleeve relative to the support prosthesis for the defect section in the extension process.
The minimally invasive extendable artificial prosthesis is preferably a prosthesis of an upper humerus segment, a lower humerus segment, an upper femur segment, a lower femur segment or an upper tibia segment.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. minimally invasive lengthening: this prosthesis need not carry out the open operation that traditional surgery operation cut a certain length skin and each layer soft tissue to infant's affected part when the extension, and only need cut the incision of about 1cm at the skin of extension structure input end position, through passageway technique (wicresoft's operation), places the extension structure department of prosthesis with specialized tool and rotates, can realize the extension of defective section prosthesis, for having the extension mode of creating, it reduces surgery incision and shows the scope and reduce the infection risk to show.
2. Reduce the risk of deep infection, alleviate cicatrization: by the minimally invasive mode, the main structure of the prosthesis does not need to be exposed in each operation, and severe scarring caused by tissue repair after each large-scale exposure of the open and prolonged surgery is reduced.
3. The effective extension length is sufficient: the same defect length (resected bone segment length) can be extended longer than invasive and non-invasive extendable prostheses, relative to non-invasive extendable prostheses (an extended prosthesis with a more complex structure).
4. The extension structure is stable and reliable: the prosthesis can directly transmit and output torque, so that the mechanical structure stability is good, and the risks of retraction of the invasive prosthesis and prolonged failure of the noninvasive and extendable prosthesis do not exist.
Drawings
Fig. 1 is a schematic view of an overall structure of a transverse input transmission extension type artificial prosthesis according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the transversely-input-transmission extended prosthesis according to the present invention after the support prosthesis at the defect section is removed;
fig. 3 is a schematic structural diagram of a direct axial extension type artificial prosthesis provided by the second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the system or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used to define elements only for convenience in distinguishing between the elements, and unless otherwise stated have no special meaning and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The minimally invasive extendable artificial prosthesis provided by the embodiment of the invention is described in detail below with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 and 2, the present embodiment provides a lateral input transmission extension type artificial prosthesis, which includes: the defect section supporting prosthesis 1 is internally provided with a slideway which extends along the longitudinal direction; the extension sleeve 2 is coaxially arranged in the slide way of the defect section support prosthesis 1 and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve 2; the main retracting screw rod 3 is screwed in the extension sleeve 2; the transmission mechanism 4 is arranged in a slide way of the defect segment supporting prosthesis 1 positioned below the extension sleeve 2, the output end of the transmission mechanism 4 is connected with the main retracting lead screw 3, and the transmission mechanism 4 is configured to transmit the rotation torque to the main retracting lead screw 3 so as to drive the main retracting lead screw 3 to rotate; and the power input part 5 is connected with the input end of the transmission mechanism 4 and is used for inputting the rotating torque to the transmission mechanism 4.
In the above embodiment, preferably, the power input member 5 is a bolt or a transverse bevel gear with a transverse thread formed thereon, and the output end of the power input member 5 is connected to the input end of the transmission mechanism 4 after transversely penetrating the defect segment supporting prosthesis 1, thereby inputting the rotational torque to the transmission mechanism 4 by driving the power input member 5 to rotate transversely.
In the above embodiment example, the transmission mechanism 4 preferably employs a planetary gear transmission, and specifically, the planetary gear transmission includes: a longitudinal rotary column 41 forming an input end of the transmission mechanism 4, the lower end of the longitudinal rotary column 41 being processed with a longitudinal thread or having a longitudinal bevel gear and being engaged with an output end of the power input member 5 to convert a transverse torque of the power input member 5 into a longitudinal torque of the longitudinal rotary column 41, the upper end of the longitudinal rotary column 41 forming a central gear; the gear ring 42 is tightly connected in the slideway of the defect section supporting prosthesis 1; a plurality of pinion gears 43 engaged between the sun gear of the longitudinal rotary column 41 and the ring gear 42; the planet carrier 44 is fixedly connected with the main retracting screw 3, and the planet carrier 44 is respectively connected with the planet gears 43 through a plurality of connecting columns 45. Thus, when the longitudinal rotation column 41 rotates, the driving planetary gear 43 rotates longitudinally around the ring gear 42, and the main retracting screw 3 rotates longitudinally through the connecting column 45 and the planet carrier 44.
In the above embodiment, it is preferable that the outer wall of the extension sleeve 2 is formed with at least two longitudinally extending guide grooves 21, and correspondingly, the inner wall of the prosthesis 1 is formed with at least two longitudinally extending ribs (not shown), and the guide grooves 21 of the extension sleeve 2 are matched with the ribs of the prosthesis 1, thereby limiting the rotation of the extension sleeve 2 relative to the prosthesis 1 during the extension process.
In the above embodiment, preferably, the reduction ratio of the planetary transmission is 1: 3-1: 50, the specific parameters are designed according to the condition of the patient and the requirement of the retracting force. Specifically, when the reduction ratio is large, it may be considered that the power input member 5 is driven to rotate by connecting the hexagonal bit with the electric drill; and when the deceleration ratio is small, the power input member 5 can be driven to rotate by a manual screwdriver.
In the above embodiment, preferably, a retraction prevention mechanism is formed between the extension sleeve 2 and the main retraction screw 3, and specifically, the main retraction screw 3 is a trapezoidal screw with a self-locking thread angle, so that not only can the bearing capacity of the extension sleeve 2 and the main retraction screw 3 be increased, but also the retraction of the extension sleeve 2 can be effectively prevented, and the larger the reduction ratio is, the larger the required torque for retraction is, and the actual human body load cannot retract the extended extension sleeve 2 through the structure.
In the above embodiment, the artificial prosthesis is preferably suitable for extending the reconstruction of the defect prosthesis after tumor resection of common parts of the upper limb and the lower limb, specifically, the defect section supporting prosthesis 1 may be a prosthesis of parts such as an upper humerus section, a lower humerus section, an upper femur section, a lower femur section or an upper tibia section, wherein the lower femur section or the upper tibia section is a reconstruction part after tumor resection of a clinically common malignant tumor around the knee joint.
When the transverse input transmission extension type artificial prosthesis provided by the embodiment is used, after the artificial prosthesis is implanted into a human body to complete defect reconstruction of a corresponding part, when a reconstructed side limb needs to be extended, firstly, an incision of about 1cm is cut at the skin position positioned at the outer side of the power input part 5, subcutaneous tissues, muscles and the like are separated in a blunt manner to the power input part 5 at the exposed position, and the operation can be positioned under intraoperative fluoroscopy. Then, according to the design of the reduction ratio, an electric drill or a manual screwdriver is used for placing the power input part 5, and the power input part 5 is driven to rotate to drive the longitudinal rotating column 41 in the transmission mechanism 4 to rotate; and finally, the rotation torque is transmitted to the main retracting screw rod 3 through the planetary gear 43, and the extension sleeve 2 is rotationally driven by the main retracting screw rod 3 to generate longitudinal displacement along the slide way of the defect section supporting prosthesis 1, so that the extension of the artificial prosthesis is realized.
Example two:
as shown in fig. 3, the present embodiment provides a direct axial extension type artificial prosthesis, comprising: the defect section supporting prosthesis 1 is internally provided with a channel extending along the longitudinal direction; the extension sleeve 2 is coaxially arranged in the slide way of the defect section supporting prosthesis 1 and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve 2; a retracting rotating rod 6, which comprises a rotating rod section 61 and a retracting driving section 62 connected to one end of the rotating rod section 61, wherein the rotating rod section 61 is assembled in the channel of the defect section supporting prosthesis 1 in a circumferentially rotatable and longitudinally immovable manner, the outer wall of the retracting driving section 62 is provided with external threads and is screwed in the extension sleeve 2; the defect segment extension prosthesis 7 is connected to the free end of the extension sleeve 2 and can move synchronously with the extension sleeve 2.
In the above embodiment, it is preferable that the retracting driving section 62 is integrally connected to one end of the rotating rod section 61, and the diameter of the retracting driving section 62 is larger than that of the rotating rod section 61, so as to form a "T" type integrated structure.
In the above embodiment, it is preferable that the outer wall of the extension sleeve 2 is formed with at least two guide grooves extending in the longitudinal direction, and correspondingly, the inner wall of the prosthesis 1 is formed with at least two ribs (not shown) extending in the longitudinal direction, and the guide grooves of the extension sleeve 2 are matched with the ribs of the prosthesis 1, thereby limiting the rotation of the extension sleeve 2 relative to the prosthesis 1 during the extension process.
In the above embodiment, preferably, a retraction prevention mechanism is formed between the thread section of the extension sleeve 2 and the retraction driving section 62 of the retraction rotating rod 6, and specifically, the external thread of the retraction driving section 62 is a trapezoidal thread with a self-locking thread angle, so that not only can the bearing capacity between the extension sleeve 2 and the retraction rotating rod 6 be increased, but also the extension sleeve 2 can be effectively prevented from retracting.
In the above embodiment, preferably, the end face of the other end of the rotary rod section 61 is provided with a groove for matching with a manual screwdriver.
When the direct axial extension type artificial prosthesis provided by the embodiment is used, after the artificial prosthesis is implanted into a human body to complete corresponding part defect reconstruction, when a reconstructed side limb needs to be extended, firstly, a manual screwdriver is placed into a groove of the rotating rod section 61 through a skin and soft tissue channel, then the manual screwdriver is used for screwing the retraction rotating rod 6 to rotate, then the retraction driving section 62 of the retraction rotating rod 6 drives the extension sleeve 2 to generate longitudinal displacement along a slide way of the defect section supporting prosthesis 1, the defect section extension prosthesis 7 is pushed out, and therefore the extension of the artificial prosthesis is realized.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. A minimally invasive extendable prosthesis, comprising:
the defect section supporting prosthesis (1) is internally provided with a slideway extending along the longitudinal direction;
the extension sleeve (2) is coaxially arranged in a slide way of the defect section supporting prosthesis (1) and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve (2);
the main retracting screw rod (3) is screwed in the extension sleeve (2) in a threaded manner;
a transmission mechanism (4) arranged in a slideway of the defect segment support prosthesis (1) below the extension sleeve (2), wherein an output end of the transmission mechanism (4) is connected with the main retracting screw (3), and the transmission mechanism (4) is configured to transmit a rotation torque to the main retracting screw (3) so as to drive the main retracting screw (3) to rotate;
and the power input part (5) is connected with the input end of the transmission mechanism (4) and is used for inputting the rotating torque to the transmission mechanism (4).
2. The minimally invasive extendable prosthesis according to claim 1, wherein the power input member (5) is a bolt or a transverse bevel gear with transverse threads, and the output end of the power input member (5) transversely penetrates through the defect segment supporting prosthesis (1) and then is connected with the input end of the transmission mechanism (4), so that the power input member (5) is driven to transversely rotate to input the rotating torque into the transmission mechanism (4).
3. Minimally invasive extendable prosthesis according to claim 2, characterized in that the transmission mechanism (4) employs a planetary gear transmission comprising:
a longitudinal rotary column (41) forming an input end of the transmission mechanism (4), wherein the lower end of the longitudinal rotary column (41) is provided with a longitudinal thread or a longitudinal bevel gear and is meshed with an output end of the power input part (5) so as to convert the transverse torque of the power input part (5) into the longitudinal torque of the longitudinal rotary column (41), and the upper end of the longitudinal rotary column (41) forms a central gear;
the gear ring (42) is fixedly connected in the slideway of the defect section supporting prosthesis (1);
a plurality of planet gears (43) engaged between the sun gear of the longitudinal rotary column (41) and the ring gear (42);
the planet carrier (44) is fixedly connected with the main retracting screw rod (3), and the planet carrier (44) is respectively connected with each planetary gear (43) through a plurality of connecting columns (45).
4. The minimally invasive extendable prosthesis according to claim 3, wherein said planetary gear transmission has a reduction ratio of 1: 3-1: 50.
5. minimally invasive extendable prosthesis according to any of claims 1 to 4, characterized in that an anti-retraction mechanism is formed between the extension sleeve (2) and the primary retraction screw (3), i.e. the primary retraction screw (3) is a trapezoidal screw with self-locking thread angle.
6. A minimally invasive extendable prosthesis, comprising:
the defect section supporting prosthesis (1) is internally provided with a channel extending along the longitudinal direction;
the extension sleeve (2) is coaxially arranged in a slide way of the defect section supporting prosthesis (1) and forms a sliding pair, and an internal thread is processed on the inner wall of the extension sleeve (2);
a retracting rotating rod (6) which comprises a rotating rod section (61) and a retracting driving section (62) connected to one end of the rotating rod section (61), wherein the rotating rod section (61) is assembled in the channel of the defect section supporting prosthesis (1) in a circumferentially rotatable and longitudinally immovable mode, the outer wall of the retracting driving section (62) is provided with external threads and the external threads are screwed in the extension sleeve (2);
the defect section extension prosthesis (7) is connected to the free end of the extension sleeve (2) and can move synchronously with the extension sleeve (2).
7. The minimally invasive extendable prosthesis according to claim 6, wherein the retracting drive section (62) is integrally connected to one end of the rotating rod section (61), and the diameter of the retracting drive section (62) is larger than the diameter of the rotating rod section (61) to form a T-shaped integrated structure.
8. The minimally invasive extendable prosthesis according to claim 7, wherein an anti-retraction mechanism is formed between the thread section of the extension sleeve (2) and the retraction driving section (62) of the retraction rotating rod (6), i.e. the external thread of the retraction driving section (62) is a trapezoidal thread with a self-locking thread angle.
9. Minimally invasive extendable prosthesis according to claim 1 or 6, wherein the outer wall of the extension sleeve (2) is provided with at least two guide grooves (21) extending in the longitudinal direction, and correspondingly the inner wall of the prosthesis (1) is provided with at least two ridges extending in the longitudinal direction, and the guide grooves (21) of the extension sleeve (2) are matched with the ridges of the prosthesis (1) to limit the rotation of the extension sleeve (2) relative to the prosthesis (1) during the extension process.
10. Minimally invasive extendable prosthesis according to claim 1 or 6, wherein the defective segment supporting prosthesis (1) is an upper humerus, a lower humerus, an upper femur, a lower femur or an upper tibia prosthesis.
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| CN202122798844.3U CN217091032U (en) | 2021-11-16 | 2021-11-16 | Minimally invasive extendable artificial prosthesis |
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| CN202122798844.3U CN217091032U (en) | 2021-11-16 | 2021-11-16 | Minimally invasive extendable artificial prosthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116747052A (en) * | 2023-08-22 | 2023-09-15 | 北京爱康宜诚医疗器材有限公司 | Long section bone prosthesis convenient to installation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116747052A (en) * | 2023-08-22 | 2023-09-15 | 北京爱康宜诚医疗器材有限公司 | Long section bone prosthesis convenient to installation |
| CN116747052B (en) * | 2023-08-22 | 2023-10-27 | 北京爱康宜诚医疗器材有限公司 | Long section bone prosthesis convenient to installation |
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