Phalanx auxiliary positioning assembly

Abstract

The utility model provides a phalanx auxiliary positioning assembly which is characterized in that a plurality of knuckle fixing pieces extend along the direction of knuckles and are arranged around the knuckles; the knuckle adjusting piece is arranged on the knuckle fixing piece in a sleeving manner and can slide, and the knuckle fixing piece can be locked on the knuckle after the knuckle adjusting piece slides in place; the needle placement guide piece is arranged at the far end of the knuckle fixing piece and is provided with a needle placement channel, and the needle placement channel allows a bone needle to enter an area defined by the knuckle fixing piece. According to the utility model, the knuckle fixing piece surrounds and is arranged around the knuckles of a patient, the knuckle fixing piece is fixed on the knuckles and the straightening state of the knuckles is adjusted through the sliding of the knuckle adjusting piece, and a Kirschner wire is used for carrying out needle placement on the knuckles according to the guide direction of the needle placement channel on the needle placement guide piece. According to the utility model, reliable and objective needle placement parameter comparison is provided for bone needle internal fixation, so that needle insertion is more accurate, the influence of personal errors on the operation process is remarkably reduced, and the operation time is effectively shortened.

Description

TECHNICAL FIELD

[0001] The utility model discloses medical instrument field, especially a needle placement instrument. BACKGROUND

[0002] In some hand orthopedic fixation, for example, the patient has finger contracture, phalangeal fracture etc., the mainstream adopts the kirschner wire internal fixation method, and the short fracture, avulsion fracture etc. are fixed.

[0003] In the operation process, accurately determining the needle insertion point position of the phalanx is the key technology of the successful operation. An accurate needle insertion point not only can shorten the operation time, but also can effectively reduce the risk of complications, so as to improve the overall curative effect of the operation. However, this step still depends on the personal experience and skill of the operation doctor in most hospitals, and the needle position can be further evaluated through repeated X-ray fluoroscopy during the operation, and the needle position is adjusted repeatedly. The above process has certain blindness, and the evaluation of the needle position often depends on subjective judgment, and lacks objective and accurate evaluation standard.

[0004] At present, some hospitals carry out the clinical application of 3D printed phalanx guide plate. Through accurate design and 3D printing before operation, the guide plate matched with the bone shape of the patient is manufactured, and then is used as reference and guide in the operation process. However, the patients who need kirschner wire internal fixation method often go to the hospital at night, and due to the joint of time and cost, such patients often cannot get the auxiliary treatment of 3D printed customized phalanx guide plate. SUMMARY

[0005] The purpose of the application is to provide a phalanx auxiliary positioning assembly which can effectively shorten the operation time and improve the accuracy of bone needle placement.

[0006] Technical scheme: the utility model provides a kind of phalanx auxiliary positioning assembly, comprising:

[0007] The phalangeal fixing member extends along the phalangeal direction, and a plurality of phalangeal fixing members are arranged around the phalangeal joint.

[0008] The phalangeal adjusting member is sleeved on the phalangeal fixing member and can slide, and after sliding in place, the phalangeal fixing member can be locked on the phalangeal joint.

[0009] The needle placement guide is arranged at the distal end of the phalangeal fixing member, and is provided with a needle placement channel, which allows the bone needle to enter the area surrounded by the phalangeal fixing member.

[0010] Further, the length of the phalangeal fixing member is greater than the length of the phalanx.

[0011] Further, the area surrounded by all the phalangeal fixing members gradually expands outward from the distal end to the proximal end of the phalangeal joint.

[0012] Further, the outer side surface of the phalangeal fixing member is configured with a verification channel extending along the length direction, and the verification channel is coplanar with the needle placement channel, and the bone pin accommodated in the verification channel is imaged under medical imaging.

[0013] Further, the number of the phalangeal fixing members is at least four.

[0014] Further, the phalangeal adjusting member is sleeved outside the phalangeal fixing member, and the phalangeal adjusting member is configured with a sliding part matched with the outer side surface of the phalangeal fixing member.

[0015] Further, the phalangeal adjusting member is a circular ring, and the sliding part is a groove consistent with the width of the outer side surface of the phalangeal fixing member.

[0016] Further, the phalangeal adjusting member is an elastic member.

[0017] Further, the distal end of the phalangeal fixing member is provided with a support part for fixing a needle placement guide, and the needle placement guide is axially connected to the center of the support part.

[0018] Further, the proximal end of the support part is configured with a thrust part, and when the phalangeal adjusting member slides into place and locks the phalangeal fixing member on the phalangeal joint when the phalangeal joint is straightened.

[0019] Beneficial effects: the phalangeal fixing member is arranged around the phalangeal joint of the patient, the phalangeal fixing member is fixed on the phalangeal joint and the straightened state of the phalangeal joint is adjusted through the sliding of the phalangeal adjusting member, and the Kirschner wire is placed on the phalangeal joint according to the guiding direction of the needle placement channel on the needle placement guide. The utility model provides reliable and objective needle placement parameter comparison for bone pin internal fixation, makes needle insertion more accurate, significantly reduces the influence of human error on the operation process, and effectively shortens the operation time. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or related technologies, the following will briefly introduce the drawings needed to be used in the embodiment or related technology description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0021] Figure 1 It is the structure schematic diagram of the utility model;

[0022] Figure 2 It is the structure schematic diagram of the phalangeal fixing member first view;

[0023] Figure 3is a structure diagram of the second view angle of the joint fixing member;

[0024] Figure 4 is a structure diagram of the joint adjusting member;

[0025] Figure 5 is a structure diagram of the in-situ needle placement verification. DETAILED DESCRIPTION

[0026] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0027] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms “inner”, “outer”, “far” and “near” are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as a limitation on the embodiments of the present application that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0028] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “connected” and “connected” should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In the description of the present application, the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example” or “some examples” means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0030] In cases of finger contracture or phalanx fracture, Kirschner wire fixation is typically used to immobilize the phalanx; this procedure is known as Kirschner wire internal fixation. During the surgery, the surgeon's experience is crucial in determining the insertion point; precise insertion significantly increases the success rate. In practice, the surgeon often relies on multiple intraoperative X-ray fluoroscopy scans to adjust the insertion position and direction, ensuring optimal phalanx fixation. As one can imagine, this method relies heavily on the surgeon's experience, making it difficult to provide objective assessments of the fixation effect. Furthermore, the need for multiple intraoperative X-ray fluoroscopy scans for evaluation and comparison increases surgical time and exposes the patient to unnecessary radiation.

[0031] Based on this, the present invention provides a finger bone auxiliary positioning component, such as... Figures 1-4 As shown, it includes a knuckle fixation member 100, a knuckle adjustment member 200, and a needle placement guide member 300. The knuckle fixation member 100 extends along the knuckle direction, and several knuckle fixation members 100 are arranged around the knuckle, so that the knuckle can be placed within the internal space 400 formed by all the knuckle fixation members 100; the knuckle adjustment member 200 is sleeved on the knuckle fixation member 100 and can slide, and after sliding into place, it can lock the knuckle fixation member 100 on the knuckle; the needle placement guide member 300 is located at the distal end of the knuckle fixation member 100 and has a needle placement channel 301, which allows the bone needle 500 to enter the internal space 400 enclosed by the knuckle fixation members 100. After adjusting the finger joint to a straight position, slide the finger joint adjustment component 200. With the finger fixed by the finger joint fixation component 100, insert the needle through the needle placement channel 301 reserved on the needle placement guide component 300. The needle insertion point and direction can be planned in advance according to the relatively fixed positional relationship between the needle placement guide component 300 and the finger joint fixation component 100, which is more conducive to the success of the operation.

[0032] To better fit the patient's finger bones and allow the knuckle fixation component 100 to support and fix the finger, the length of the knuckle fixation component 100 is greater than the set length of the finger bone. The configuration of the knuckle fixation component 100 is not limited; as one implementation, it can be constructed as a strip-shaped guide plate based on the length of the finger bone. Since the length of the knuckles varies among patients, the length of the strip-shaped guide plate can be designed in various ways, and the most suitable length can be selected for finger fixation according to the actual situation of different patients. A standard for selecting the length of the knuckle fixation component 100 can be that one end of the strip-shaped guide plate rests against the web between the two fingers, and the other end must be longer than the knuckle. With this configuration, sufficient space can be provided for the needle placement guide component 300 to insert the needle, allowing for better determination of the needle insertion point under the guidance of the needle placement guide component 300.

[0033] The number of knuckle fixation members 100 is not limited, but to better improve the fixation effect of the fingers, there should be at least four knuckle fixation members 100, evenly distributed around the phalanx. Imagine that when there are four, one knuckle fixation member 100 can be placed on the inner and outer sides, palmar and dorsal sides of the phalanx. With the assistance of the knuckle adjustment member 200, these fixation members 100 help to straighten the knuckle from all directions, thus limiting its movement around the phalanx.

[0034] As one example, the knuckle retainer 100 includes a first retainer 101 and a plurality of second retainers 102, wherein the length of the first retainer 101 is greater than the length of the second retainers. Figure 2 As shown, the length of the strip guide plate serving as the first fixation member 101 is greater than the length of the other strip guide plates serving as the second fixation member 102. It can be understood that since the first fixation member 101 is significantly longer than the second fixation member 102, the direction of the first fixation member 101 can be taken as the palmar direction, which is convenient for palmar marking during operation. For example, in the surgery for proximal phalanx fracture, the first fixation member 101 can be fixed to the metacarpal bone.

[0035] In addition, the length of the first fixation member 101 can be further extended. When the first fixation member 101 reaches a sufficient length, it can simulate the alignment of the metacarpal and phalangeal bones on the dorsal side in a line, which can serve as another type of operation instruction during the operation.

[0036] Generally, the side of the distal phalanx is defined as the distal end of the phalanx, and the side of the proximal phalanx is defined as the proximal end of the phalanx. In order to facilitate the adjustment and locking of the phalanx fixation member 100 by the phalanx adjustment member 200, the extension direction of all phalanx fixation members 100 is set so that the area they enclose gradually expands outward from the distal end of the phalanx (one end of the pin guide member 300) to the proximal end (open end). Therefore, the outer end face size formed by all phalanx fixation members 100 around the phalanx is smaller than the proximal end face size. The phalanx fixation member 100 is easier to install from the outer end face onto the phalanx fixation member 100 and slide smoothly towards the proximal end until it is finally locked.

[0037] Furthermore, to better verify the needle placement trajectory during surgery, the outer surface of the knuckle fixation member 100 is constructed with a verification channel 103 extending along the length direction. The verification channel 103 can be configured as a gap to facilitate the accommodation of the Kirschner wire. During surgery, the phalanx auxiliary positioning component of this embodiment is imaged together with the finger (e.g., X-ray fluoroscopy), and the Kirschner wire in the gap can be imaged and verified during surgery.

[0038] Specifically, the position of the verification channel 103 on the phalangeal fixation member 100 is configured such that the needle placement channel 301 is coplanar with the verification channel 103 on the medial and lateral phalangeal fixation members 100, and the needle placement channel 301 is coplanar with the verification channel 103 on the palmar and dorsal phalangeal fixation members 100. It can be imagined that when X-ray fluoroscopy is performed, the projections of the verification channels 103 on the medial and lateral phalangeal fixation members 100 on the sagittal plane coincide with the needle placement channel 301, and the projections of the verification channels 103 on the palmar and dorsal phalangeal fixation members 100 on the coronal plane coincide with the needle placement channel 301, so that when the needle has not been placed, the needle placement can be simulated in the verification channel 103, and whether the needle placement direction is accurate can be observed by X-ray fluoroscopy, thereby providing a more reliable basis for intraoperative needle placement.

[0039] Specifically, as shown in Figure 3 Due to the thick palmar soft tissue, the metacarpal bone and the phalangeal bone cannot be precisely aligned on a straight line, and therefore the phalangeal fixation member 100 corresponding to the palmar side can not be provided with a verification channel 103.

[0040] In some examples, the phalangeal adjustment member 200 is sleeved outside the phalangeal fixation member 100, or the phalangeal fixation member 100 is sleeved outside the phalangeal member. Regardless of which setting form, as long as the phalangeal adjustment member 200 and the phalangeal fixation member 100 abut relative to each other, a counteracting force is generated, which can limit the radial direction of all phalangeal fixation members 100, prevent the relative position from changing, and finally limit the position.

[0041] For example, as shown in Figure 1 The phalangeal adjustment member 200 is sleeved on the outer circumferential surface of the phalangeal fixation member 100. Since the outer end surface of the distal end of all phalangeal fixation members 100 has a small outer diameter, the outer diameter gradually increases when the distal end approaches the proximal end. Therefore, when the phalangeal fixation member 100 is sleeved from the distal end, it smoothly slides towards the proximal end until the inner diameter of the phalangeal adjustment member 200 is equivalent to the outer diameter formed by all phalangeal fixation members 100. At this time, the phalangeal fixation member 100 is locked on the phalangeal bone by the phalangeal adjustment member 200.

[0042] In particular, the phalangeal adjustment member 200 is configured with a sliding portion adapted to the outer surface of the phalangeal fixation member 100. The sliding portion is provided to facilitate the sliding of the phalangeal adjustment member 200 relative to the phalangeal fixation member 100, and to finally generate a locking effect.

[0043] As one of the embodiments, the knuckle adjusting member 200 can be configured as a ring which is sleeved outside the knuckle fixing member 100, and the sliding part is a groove 201 which is consistent with the width of the outer side of the knuckle fixing member 100. The groove 201 can guide and position the knuckle fixing member 100. When the groove 201 is clamped with the knuckle fixing member 100, all the knuckle fixing members 100 are limited in the groove 201 of the ring, in which case the sliding of the knuckle adjusting member 200 is more stable and smooth.

[0044] It should be noted that in the presence of the verification channel 103, the groove 201 needs to have a corresponding notch for the Kirschner wire to pass through smoothly.

[0045] Further, the knuckle adjusting member 200 can be set as an elastic member, which can continuously provide a static friction force to the knuckle fixing member 100 in the locked state, so that the entire auxiliary positioning assembly remains stable during the operation and is not easily unlocked.

[0046] In addition, the distal end of the knuckle fixing member 100 is provided with a support part for fixing the needle guide 300. The needle guide 300 is axially connected to the center of the support part. The support part serves two purposes. One is to connect the distal ends of all knuckle fixing members 100 into a whole, making the structure stable. The other is to provide a mounting position for the needle guide 300. Specifically, the support part is configured as a circular table which connects the distal ends of all knuckle fixing members 100. The circular table can be further hollowed out to reduce the weight of the entire assembly and not burden the patient. As one of the examples of the hollowed-out circular table, the support part is a cross-shaped support frame 104 which connects the distal ends of all knuckle fixing members 100. The center of the support frame 104 is connected to one end of the needle guide 300. The needle guide 300 is penetrated by the needle channel 301 which communicates with the internal space 400 of the knuckle fixing member 100. The Kirschner wire can be inserted from the other end of the needle channel 301 and enter the knuckle fixing position according to the set direction of the needle guide 300.

[0047] In addition, as shown in Figure 3 The proximal end of the support part is configured with a thrust part 105. When the fingertips of the patient contact the thrust part 105, the knuckles of the patient are in a straightened state. At this time, it indicates that the knuckle fixing part is installed in place. The thrust part 105 can give the patient a touch and prompt of installation in place. The knuckle adjusting member 200 is slid into place and locks the knuckle fixing member 100 on the knuckle. At this time, the entire phalanx auxiliary positioning assembly is assembled and stable.

[0048] The use process of the above phalanx auxiliary positioning assembly includes an assembly step and an intraoperative step:

[0049] During assembly, the knuckle fixation member 100 is wrapped around the patient's knuckle and slid into the knuckle adjustment member 200. At this time, the knuckle adjustment member 200 is initially fixed on the knuckle fixation member 100, but not yet locked.

[0050] Under X-ray fluoroscopy, Kirschner wires are inserted into the verification channel 103 of the palmar and inner / outer phalangeal fixation member 100 to simulate whether the actual needle placement position of the needle placement channel 301 is appropriate, and adjustments are made accordingly.

[0051] After the phalanx adjustment member 200 is locked in position on the phalanx fixation member 100, and the patient's phalanx (including the distal, middle and proximal phalanxes) is compressed and in an extended state, the phalanx fixation member 100 finally fixes the entire phalanx auxiliary positioning component on the patient's phalanx.

[0052] After locking, the needle placement channel 301 is verified again by X-ray fluoroscopy. The process will not be described in detail here.

[0053] During the operation, such as Figure 5 As shown, the Kirschner wire is inserted through the needle placement channel 301 under X-ray fluoroscopy. After the Kirschner wire enters the phalanx, the Kirschner wire in the verification channel 103 is removed.

[0054] Postoperatively, the phalanx positioning components are removed or dismantled, for example, by using cleavers to break the phalanx.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should be covered within the scope of the claims of the present invention.

Claims

1. A phalangeal assist positioning assembly, comprising: The application relates to a knuckle fixing device for fixing a bone pin on a knuckle, comprising: a plurality of knuckle fixing members extending along the knuckle direction, the knuckle fixing members being arranged around the knuckle; a knuckle adjusting member sleeved on the knuckle fixing members and slidable, the knuckle adjusting member being capable of locking the knuckle fixing members on the knuckle after sliding to a position; a needle placement guide arranged at the distal end of the knuckle fixing members and configured with a needle placement channel, the needle placement channel allowing the bone pin to enter the area surrounded by the knuckle fixing members.

2. The phalangeal assist positioning assembly of claim 1, wherein, The length of the knuckle fixing members is greater than the length of the set phalanx.

3. The phalangeal assist positioning assembly of claim 1, wherein, The area surrounded by the knuckle fixing members gradually expands from the distal end to the proximal end of the knuckle.

4. The phalangeal assist positioning assembly of claim 1, wherein, The outer side surface of the knuckle fixing members is configured with a verification channel extending along the length direction, the verification channel being coplanar with the needle placement channel, and the bone pin accommodated in the verification channel being imaged under medical imaging.

5. The phalangeal assist positioning assembly of any of claims 1-4, wherein, The number of the knuckle fixing members is at least four.

6. The phalangeal assist positioning assembly of claim 1, wherein, The knuckle adjusting member is sleeved outside the knuckle fixing members, and the knuckle adjusting member is configured with a sliding part matched with the outer side surface of the knuckle fixing members.

7. The phalangeal assist positioning assembly of claim 6, wherein, The knuckle adjusting member is a circular ring, and the sliding part is a groove with a width consistent with the outer side surface of the knuckle fixing members.

8. The phalangeal assist positioning assembly of claim 1, wherein, The knuckle adjusting member is an elastic member.

9. The phalangeal assist positioning assembly of claim 1, wherein, The distal end of the knuckle fixing members is provided with a support part for fixing the needle placement guide, and the needle placement guide is axially connected to the center of the support part.

10. The phalangeal assist positioning assembly of claim 9, wherein, The proximal end of the support part is configured with a thrust part, the thrust part being in contact with the fingertip, and the knuckle adjusting member sliding to a position and locking the knuckle fixing members on the knuckle when the knuckle is straightened.

Images