CN111904587A - Kirschner wire guider based on patella thickness - Google Patents

Abstract

Translated fromChinese

本发明提供了一种基于髌骨厚度的克氏针导向器，包括卡钳、固定盘、克氏针导向部，卡钳包括上把手、下把手和上卡片、下卡片，平行的上把手与下把手之间设有压缩弹簧，上把手和上卡片之间通过内连接杆相连，下把手和下卡片之间通过外连接杆相连，外连接杆套在内连接杆的外侧，内连接杆和外连接杆之间设有能够显示髌骨厚度的刻度，所述上卡片上安装有用于固定在髌骨背侧的固定盘，固定盘的靠近髌骨的一侧为弧形面，固定盘的背侧上设有螺纹柱和螺母，克氏针导向部包括纵向延长杆、后向延长杆、定位套筒，定位套筒上设有供克氏针穿过的定位孔。出针位置准确，便于固定加压，避免术中切开髌韧带或股四头肌肌腱寻找针尖而增加损伤。

The invention provides a K-wire guide based on the thickness of the patella, comprising a caliper, a fixed disc and a K-wire guide part, the caliper includes an upper handle, a lower handle and an upper card and a lower card, and the parallel upper handle and the lower handle are between the upper handle and the lower handle. There is a compression spring between, the upper handle and the upper card are connected by an inner connecting rod, the lower handle and the lower card are connected by an outer connecting rod, the outer connecting rod is sleeved on the outer side of the inner connecting rod, and the inner connecting rod and the outer connecting rod are connected. There is a scale between them that can display the thickness of the patella, the upper card is equipped with a fixing plate for fixing on the back of the patella, the side of the fixing plate close to the patella is an arc surface, and the back side of the fixing plate is provided with threads A column and a nut, the K-wire guide part includes a longitudinal extension rod, a rearward extension rod, and a positioning sleeve, and the positioning sleeve is provided with a positioning hole for the K-wire to pass through. The position of the needle is accurate, which is convenient for fixation and compression, and avoids the increase of injury by incising the patellar ligament or quadriceps tendon to find the needle tip during the operation.

Description

Kirschner wire guider based on patella thickness

Technical Field

The invention relates to the technical field of medical instruments, in particular to a kirschner wire guider based on patella thickness.

Background

Tension band fixation is a common procedure for treating patellar fractures, usually by drilling through the fracture surface of the patella into one side and then reversing the k-wire into the other side. Firstly, the inner side and the outer side of the kirschner wires are inclined to cause poor position or the two kirschner wires cannot be parallel to influence the pressurizing effect; secondly, anterior and posterior oblique injury to patellar cartilage or fixation failure due to too thin cortex on one side can occur; third, the point of exit of the k-wire is uncertain and may require intraoperative incision of the patellar ligament or the quadriceps femoris tendon to find the needle point and increase trauma.

Disclosure of Invention

In view of the problems in the prior art, the invention provides a kirschner wire guider based on patella thickness, which adopts the technical scheme that the guider comprises calipers, a fixed disc and a kirschner wire guiding part, wherein the calipers comprise an upper handle and a lower handle which are positioned at the top end, and an upper clamping piece and a lower clamping piece which are positioned at the bottom end, a compression spring is arranged between the parallel upper handle and the lower handle, the upper handle and the upper clamping piece are connected through an inner connecting rod, the lower handle and the lower clamping piece are connected through an outer connecting rod, the outer connecting rod is sleeved on the outer side of the inner connecting rod, a scale capable of displaying the patella thickness is arranged between the inner connecting rod and the outer connecting rod, the fixed disc fixed on the back side is arranged on the upper clamping piece, one side of the fixed disc close to the patella is an arc-shaped surface, a threaded column and a nut are arranged on, The utility model discloses a fixing device, including fixing plate, the screw thread post of fixed disk, the locating sleeve, be equipped with on the vertical extension rod be used for the through-hole of cover on the screw thread post of fixed disk and be used for connecting the mounting groove to the extension rod, fix in the mounting groove to the one end of extension rod, the locating sleeve is connected to the other end, is equipped with the locating hole that supplies the kirschner wire to pass on the locating sleeve, and the axis of locating hole is parallel with vertical extension.

Preferably, the upper handle or the lower handle is hinged with a fixed tooth buckle for locking the pressurized upper handle and the pressurized lower handle together.

Preferably, the cross section of the outer connecting rod is rectangular with an opening.

Preferably, the dorsal part of fixed disk is equipped with the draw-in groove that supplies the card to get into, and the top of draw-in groove is equipped with the stationary blade, is equipped with the fixing bolt who is used for pushing up the card tightly on the stationary blade, the screw thread post is located one side of draw-in groove.

Preferably, a mounting frame is fixed at the tail end of the backward extension rod, and the two positioning sleeves are fixed on the mounting frame.

Preferably, it is fixed through the buckle respectively to between vertical extension rod and the back extension rod, mounting bracket and the position sleeve, and the buckle is including the side of the bottom surface that has the tight screw in top and two fretworks of perpendicular bottom surface, and hollow out construction on the side supplies to pass to extension rod and position sleeve.

The invention has the beneficial effects that: according to the invention, through the matching of the calipers, the fixed disc and the Kirschner wire guide part, the Kirschner wire can be driven into the middle position of the thickness of the patella, the needle outlet position is accurate, the fixation and pressurization are convenient, the increase of injury caused by cutting the patellar ligament or the quadriceps femoris tendon to search for the needle point in the operation is avoided, the pain of a patient in the operation process is relieved, and the success rate of the operation is improved.

Drawings

FIG. 1 is a schematic structural view of a patella thickness based K-wire guide of the present invention;

FIG. 2 is a schematic structural view of the caliper;

FIG. 3 is a schematic structural diagram of an inner connecting rod and an outer connecting rod;

FIG. 4 is a schematic structural view of a fixing plate;

FIG. 5 is a top view of the holding pan;

FIG. 6 is a schematic structural view of the K-wire guide;

FIG. 7 is a schematic view of a longitudinal extension rod;

FIG. 8 is a schematic view of the connection of the rearward extension pole and the alignment sleeve;

FIG. 9 is a front view of the buckle;

FIG. 10 is a side view of the buckle;

FIG. 11 is a bottom view of the buckle;

in the figure: 1-caliper, 11-upper handle, 12-lower handle, 13-upper card, 14-lower card, 15-inner connecting rod, 16-outer connecting rod, 17-compression spring, 18-fixed tooth buckle, 2-fixed disk, 21-threaded column, 22-clamping groove, 23-fixed plate, 3-Kirschner wire guide part, 30-Kirschner wire, 31-longitudinal extension rod, 32-backward extension rod, 33-positioning sleeve, 34-mounting rack and 35-buckle.

Detailed Description

The technical solution of the present invention will be described in detail by specific examples.

As shown in fig. 1 to 11, the kirschner wire guide based on patella thickness of the present invention includes a caliper 1, afixing plate 2, and a kirschnerwire guide portion 3, wherein the caliper 1 includes anupper handle 11, alower handle 12, and anupper clamping piece 13 and alower clamping piece 14 at the bottom end, acompression spring 17 is disposed between theupper handle 11 and thelower handle 12, theupper handle 11 and theupper clamping piece 13 are connected through aninner connecting rod 15, thelower handle 12 and thelower clamping piece 14 are connected through anouter connecting rod 16, theouter connecting rod 16 is sleeved outside the inner connectingrod 15, and a scale capable of displaying patella thickness is disposed between the inner connectingrod 15 and the outer connectingrod 16. Theupper clamping piece 13 is provided with afixing disc 2 for being fixed on the back side of the patella, one side of thefixing disc 2 close to the patella is an arc-shaped surface, and the back side of thefixing disc 2 is provided with a threadedcolumn 21 and a nut. Kirschnerwire guiding part 3 comprises alongitudinal extension rod 31, abackward extension rod 32 and apositioning sleeve 33, wherein a through hole for being sleeved on the threadedcolumn 21 of thefixed disk 2 and a mounting groove for being connected with thebackward extension rod 32 are formed in thelongitudinal extension rod 31, one end of thebackward extension rod 32 is fixed in the mounting groove, the other end of the backward extension rod is connected with thepositioning sleeve 33, a positioning hole for the Kirschner wire to pass through is formed in thepositioning sleeve 33, and the axis of the positioning hole is parallel to thelongitudinal extension rod 31.

In this embodiment, the proximal end of the caliper 1 is provided with a handle, which is in the shape of a handle with a length of 10cm, and the upper and lower handles are designed in parallel with a distance of 3 cm. The compression spring between the upper and lower handles is pressed close to the handle and can rebound after being loosened. The rear end of thelower handle 12 is hinged with afixed tooth buckle 18. Thefixed tooth buckle 18 can rotate and move, and after being pressed, thefixed tooth buckle 18 is buckled at the rear end of theupper handle 11 to lock.

The outer connectingrod 16 and the inner connectingrod 15 are 10cm long. The center of the outer connectingrod 15 is a rectangular hole for the inner connectingrod 15 to be placed and slide up and down, and one side of the outer connecting rod is provided with an opening for cleaning. The inner connectingrod 15 has a scale at its proximal section, the top end is 0, and the scale when the handle is completely tightened is the thickness of the patella.

Theupper card 13 and thelower card 14 are 2mm thick, 4mm wide and 50mm long, and the distance between the upper card and the lower card is 3 cm. Theupper clamping piece 13 is connected with thefixing disc 2 on the back side of the patella.

The fixeddisk 2 is circular, and its dorsal part center is equipped with dark 2mm, wide 5 mm's draw-ingroove 22 for thelast card 13 of calliper gets into, and the dorsal part of fixeddisk 2 still is equipped withstationary blade 23, and width 10mm, length 20mm span the draw-in groove, andstationary blade 23 top center is from taking fixing bolt. One side of theclamping groove 22 is provided with a threadedcolumn 21 for thelongitudinal extension rod 31 to be sleeved on and fixed by a nut.

Thelongitudinal extension rod 31 is a cuboid with the length of 8cm, the width of 1cm and the height of 1cm, the near end of 2cm is solid, a through hole at the head end can be sleeved on a threaded column at the back side of the disc and can rotate freely, and a nut is applied to the longitudinal extension rod to press and fix the longitudinal extension rod at a specific angle. The mounting groove of 6cm of far-end section is the dovetail structure, supplies to get into toextension rod 32 to connect fixedly throughbuckle 35.

Therear extension rod 32 is a solid cuboid with the length of 3cm, the width of 0.8cm and the height of 0.8cm, scales are arranged above the solid cuboid, and the tail end of the solid cuboid is connected with themounting frame 34.

Themounting rack 34 is of a three-side hollow structure with the length of 6cm, the width of 1cm and the height of 1cm, and one solid side is fixedly connected with thebackward extension rod 32 in an integrated mode. Thepositioning sleeve 33 is a cuboid with the length of 2cm, the width of 0.8cm and the thickness of 0.8cm, and a positioning hole with the diameter of 2.2mm is arranged at the center for the kirschner wire to pass through. The twopositioning sleeves 33 are connected with themounting rack 34 through thebuckles 35

Thebuckle 35 is solid at the bottom surface, provided with a jacking screw and screwed and fixed; the distance between the two side surfaces vertical to the bottom surface is 1.2cm, the side surfaces are hollow, the inner diameter is 1.0cm, and the rear extension rod and the positioning sleeve can penetrate through the hollow-out hollow.

The operation steps are as follows:

and (5) longitudinally cutting the center of the anterior patella to expose the fracture part and probing the damage condition of the joint capsule. The joint cavity is typically probed medially, flushed, cleared of debris, repositioned under direct vision, and the forceps are fixed. The upperretaining plate 13 is first inserted into theretaining groove 22 on the back of thefixing plate 2 on the back side of the patella and is not screwed on. Thelower tab 14 is inserted through the medial joint capsule cleft, generally centered on the superior-inferior diameter of the patella. Thefixed disc 2 is adjusted at the center of the back side of the patella, the upper handle and the lower handle are fastened, and the fixed disc is fixed by afixed tooth buckle 18. Theupper clip 13 is fixed by tightening the fixing bolt on the fixing plate back-side fixing piece 23. After thelongitudinal extension rod 31 is installed and adjusted to be perpendicular to the patella fracture line direction, the nut on the threadedcolumn 21 is screwed for fixing. Therear extension rod 32 is installed, and the positioning hole on thepositioning sleeve 33 is positioned at the center of the thickness of the patella according to the scale adjustment at the handle. The locatingsleeve 33 is adjusted left and right according to the width of the patella, and if the width of the patella is small, only one locatingsleeve 33 can be used. Thefastener 35 is screwed down, and the kirschner wire is driven into thepositioning sleeve 33.

Although the present invention has been described in detail with reference to the specific embodiments, the present invention is not limited to the above embodiments, and various changes and modifications without inventive changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims (6)

Translated fromChinese

1.一种基于髌骨厚度的克氏针导向器，其特征在于：包括卡钳、固定盘、克氏针导向部，卡钳包括位于顶端的上把手、下把手和位于底端的上卡片、下卡片，平行的上把手与下把手之间设有压缩弹簧，上把手和上卡片之间通过内连接杆相连，下把手和下卡片之间通过外连接杆相连，外连接杆套在内连接杆的外侧，内连接杆和外连接杆之间设有能够显示髌骨厚度的刻度，所述上卡片上安装有用于固定在髌骨背侧的固定盘，固定盘的靠近髌骨的一侧为弧形面，固定盘的背侧上设有螺纹柱和螺母，克氏针导向部包括纵向延长杆、后向延长杆、定位套筒，纵向延长杆上设有用于套在固定盘的螺纹柱上的通孔和用于连接后向延长杆的安装槽，后向延长杆的一端固定在安装槽中，另一端连接定位套筒，定位套筒上设有供克氏针穿过的定位孔，定位孔的轴线与纵向延长杆平行，后向延长杆上设有刻度。1. a kind of Kirschner wire guide based on patella thickness, it is characterized in that: comprise caliper, fixed plate, Kirschner wire guide part, caliper comprises the upper handle that is positioned at the top, the lower handle and the upper card, the lower card that are positioned at the bottom end, A compression spring is arranged between the parallel upper handle and the lower handle, the upper handle and the upper card are connected by an inner connecting rod, the lower handle and the lower card are connected by an outer connecting rod, and the outer connecting rod is sleeved on the outer side of the inner connecting rod There is a scale between the inner connecting rod and the outer connecting rod that can display the thickness of the patella. The upper card is installed with a fixing plate for fixing on the back of the patella. The side of the fixing plate close to the patella is an arc surface. A threaded post and a nut are arranged on the back side of the disc. The K-wire guide includes a longitudinal extension rod, a rearward extension rod, and a positioning sleeve. The longitudinal extension rod is provided with a through hole and It is used to connect the installation groove of the rearward extension rod. One end of the rearward extension rod is fixed in the installation groove, and the other end is connected to the positioning sleeve. The positioning sleeve is provided with a positioning hole for the K-wires to pass through. The axis of the positioning hole Parallel to the longitudinal extension rod, a scale is arranged on the rearward extension rod.2.根据权利要求1所述的基于髌骨厚度的克氏针导向器，其特征在于：上把手或下把手上铰接有用于将加压后的上下把手锁定在一起的固定牙扣。2 . The K-wire guide based on the thickness of the patella according to claim 1 , wherein the upper handle or the lower handle is hinged with a fixed tooth buckle for locking the pressurized upper and lower handles together. 3 .3.根据权利要求1所述的基于髌骨厚度的克氏针导向器，其特征在于：所述外连接杆的横截面为带有开口的长方形。3 . The K-wire guide based on patella thickness according to claim 1 , wherein the cross-section of the outer connecting rod is a rectangle with an opening. 4 .4.根据权利要求1所述的基于髌骨厚度的克氏针导向器，其特征在于：固定盘的背侧设有供上卡片进入的卡槽，卡槽的上方设有固定片，固定片上设有用于顶紧上卡片的固定螺栓，所述螺纹柱位于卡槽的一侧。4. The K-wire guide based on the thickness of the patella according to claim 1, wherein the back side of the fixing plate is provided with a slot for the upper card to enter, a fixing plate is arranged above the slot, and a fixing plate is arranged on the fixing plate. There are fixing bolts for tightening the upper card, and the threaded post is located on one side of the card slot.5.根据权利要求1所述的基于髌骨厚度的克氏针导向器，其特征在于：所述后向延长杆的末端固定有安装架，两个定位套筒固定在安装架上。5 . The K-wire guide based on the thickness of the patella of claim 1 , wherein a mounting bracket is fixed at the end of the rearward extending rod, and two positioning sleeves are fixed on the mounting bracket. 6 .6.根据权利要求5所述的基于髌骨厚度的克氏针导向器，其特征在于：所述纵向延长杆与后向延长杆、安装架与定位套筒之间分别通过卡扣固定，卡扣包括带有顶紧螺丝的底面和垂直底面的两个镂空的侧面，侧面上的镂空结构供后向延长杆和定位套筒穿过。6 . The K-wire guide based on the thickness of the patella according to claim 5 , wherein the longitudinal extension rod and the rearward extension rod, the mounting bracket and the positioning sleeve are respectively fixed by snapping, and the snapping It includes a bottom surface with top tightening screws and two hollow side surfaces with a vertical bottom surface, and the hollow structure on the side surfaces allows the rearward extension rod and the positioning sleeve to pass through.

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