CN108567510A - Lower limb length measurement instrument in total hip replacement arthroplasty - Google Patents

Lower limb length measurement instrument in total hip replacement arthroplasty Download PDF

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Publication number
CN108567510A
CN108567510A CN201810475765.9A CN201810475765A CN108567510A CN 108567510 A CN108567510 A CN 108567510A CN 201810475765 A CN201810475765 A CN 201810475765A CN 108567510 A CN108567510 A CN 108567510A
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CN
China
Prior art keywords
scale
connecting rod
side
guide pin
measuring device
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CN201810475765.9A
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Chinese (zh)
Inventor
谭美云
刘少峰
王森
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西南医科大学附属医院
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Priority to CN201810475765.9A priority Critical patent/CN108567510A/en
Publication of CN108567510A publication Critical patent/CN108567510A/en

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657Measuring instruments used for implanting artificial joints
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4657Measuring instruments used for implanting artificial joints
    • A61F2002/4658Measuring instruments used for implanting artificial joints for measuring dimensions, e.g. length

Abstract

The invention relates to a lower limb length measurement instrument in total hip replacement arthroplasty. The lower limb length measurement instrument in total hip replacement arthroplasty comprisesa sleeve ole, a connecting rod, a graduated scale and a guide pin, wherein the sleeve hole is fixedly connected to one side of the connecting rod at an angle of 45 degrees, the other side of the connecting rod is vertically connected to one side of the graduated scale, and the other side of the graduated scale is vertically and slidably connected to the guide pin. The lower limb length measurementinstrument in total hip replacement arthroplasty can solve the problem that the rotating centers of the cut caput femoris and greater trochanter are not in a same straight line effectively, thereby providing a novel solution for a final effect that double limbs are equal in length.

Description

全髋关节置换术中下肢长度测量仪 Total hip arthroplasty leg length gauge

技术领域 FIELD

[0001] 本发明涉及全髋关节置换术中下肢长度测量仪。 [0001] The present invention relates to total hip arthroplasty leg length gauge.

背景技术 Background technique

[0002] 全髋关节置换术是目前治疗股骨头坏死、老年股骨骨折和髋关节骨性关节炎的手术治疗方法。 [0002] Total hip replacement surgery is the treatment of femoral head necrosis, surgical treatment of senile femoral fracture and hip joint osteoarthritis. 通常髋关节置换术要求做到术前术后肢体等长、术后双下肢等长;术前术后肢体等长可以通过术前X光片结果确定术中具体执行长度,术后双下肢等长则需要在术中依靠术者的经验完成两侧的相同数据。 Hip replacement is typically required to do before and after surgery and other limb length, lower limbs after as long; of limb surgery may be determined as long as the length of the specific implementation, after the results of the lower limbs by the preoperative X-ray and the like preoperative long experience of the surgeon's need to rely on the same data on both sides of the completion of surgery.

[0003] 但在实际操作中,提前确定术中具体数据目前来讲有可控标准,但术中要完全控制是否达到术前确定的数据标准,则有一定难度。 [0003] However, in practice, to determine in advance the specific intraoperative data For now there are controllable standards, but surgery to completely control whether data standards determined preoperatively, there are some difficulties. 一是此类手术置换区暴露有限,位置较深,给这类手术的操作带来较大的不便;二是目前缺乏相应的髋关节置换的校正测量工具, 依靠医生经验处理,则容易出现不确定性。 One such area exposed to limited surgical replacement, deep position, to operate this type of surgery has brought great inconvenience; the second is the current lack of appropriate hip replacement calibration measurement tools, doctors rely on experience treatment, it is not prone to uncertainty. 术后若出现双下肢不等长对患者会造成生活不便,严重的会导致手术失败。 If postoperative leg length discrepancy appears to cause inconvenience to patients, a serious cause of surgical failure.

[0004] 导致术后出现双下肢不等长的原因主要在于用骨锯对髋关节进行股骨头和大粗隆两部分进行切割时,对于单个髋关节而言,依靠经验难以确定切割后两者的旋转中心仍然是在同一直线上,对于双侧髋关节而言,依靠经验难以确定切割后两者之间的距离在双侧髋关节上是否一致。 When [0004] The main reason resulting in postoperative leg length that is greater trochanter and the femoral head is cut in two parts with a hip bone saw, for a single hip, both relying on the experience difficult to determine after cutting the center of rotation is still in the same line, for bilateral hip, relying on the experience difficult to determine whether the distance between the two after cutting agreement on bilateral hip. 因此,决定术后双下肢是否等长的关键因素主要在于上述两点,即切割后的股骨头和大粗隆的旋转中心是否在同一直线上,切割后的股骨头不大粗隆的距离是否双侧一致。 Therefore, the decision whether the lower limbs after as long as the key factor lies in the above two points, that is, after cutting the femoral head and the center of rotation of whether the greater trochanter along the same line, the femoral head after cutting the distance is not tuberosity bilateral agreement.

[0005] 目前为了解决上述两点因素的影响,有单独测量切割后的股骨头不大粗隆的双侧距离的解决方案,例如专利号201220723340.3;还有利用大粗隆不髋关节的术前固定位置测量方式,来避免前述两点问题出现的解决方式,例如专利号200710071159.2。 [0005] Currently, to address the impact of the above two factors, a separate measurement solutions of the cut femoral trochanter is not bilateral distance, for example, patent No. 201220723340.3; there is no use of the greater trochanter of the hip joint preoperative fixed position measurement, to avoid the aforementioned problems of the two solutions, for example, Patent No. 200710071159.2.

[0006] 第一种方式虽然能解决前述第一个因素,但依然无法解决全部因素,导致术后仍可能会出现双下肢不等长的情况;第二种方式只需要确定最终需置换的部分和未置换的部分之间的距离不术前一致,规避了前述因素的问题,但其实现方式需要在大粗隆和髋关节上打入标记以便术前和术后确认距离,而这类标记通常是用细针钉入,这无疑会增加手术的风险。 [0006] Although the first way to solve the aforementioned first factor, but still can not solve all the factors that led to surgery may still occur leg length situation; second way is only necessary to determine the final part to be replaced and the distance between the front portion of the non-replacement surgery is not consistent, avoiding the problem of the aforementioned factors, but its implementation requires the marking at the before and after surgery in order to confirm the distance on the greater trochanter and hip, and such mark usually with a thin needle driven into, which will undoubtedly increase the risk of surgery.

发明内容 SUMMARY

[0007] 本发明提供一种全髋关节置换术中下肢长度测量仪,其可以有效解决切割后的股骨头和大粗隆的旋转中心是否在同一直线上的问题,为双下肢等长的最终效果提供一种新的解决方案。 [0007] The present invention provides a total hip arthroplasty leg length measuring device that can effectively solve the problem if the center of rotation of the femoral head and the greater trochanter of the cut in the same straight line, and the like for the lower limbs of the final length the effect of providing a new solution.

[0008] 为解决以上技术问题,本发明提供的技术方案,即一种全髋关节置换术中下肢长度测量仪,包括套孔、连接杆、刻度尺和导针; [0008] To solve the above technical problem, the technical solution provided by the present invention, i.e., a total hip arthroplasty leg length measuring device, comprising a sleeve bore, the connecting rod, the scale and the guide pin;

[0009] 所述套孔以45°角不连接杆的一侧固定连接,连接杆的另一侧不刻度尺的一侧垂直连接,刻度尺的另一侧不导针垂直滑动连接。 Fixedly connected to the side [0009] The sleeve aperture angle of 45 ° without the connecting rod, the other side of the connecting rod is not connected to the vertical side of the scale, the scale of the other side of the non-conductive connecting pin to slide vertically.

[0010]优选的,连接杆不刻度尺的连接位置位于刻度尺的〇刻度处,并且套孔的轴心线不连接杆所在直线相交。 [0010] Preferably, the connecting rod is located at the position of the scale does not scale the square at the scale, and the axis of the connecting rod sleeve hole is not located straight lines intersect.

[0011]优选的,套孔的轴心线不连接杆所在直线相交的交点是套孔的顶面圆心。 Intersection [0011] Preferably, the axis of the connecting rod sleeve hole is not located straight lines intersect is the center of the top surface of the collet bore.

[0012]优选的,刻度尺的0刻度位于刻度尺的中部位置处。 [0012] preferably at the middle position, the scale of 0 to point at the scale.

[0013]优选的,刻度尺的另一侧设置有滑槽,导针通过滑槽在刻度尺上滑动。 [0013] Preferably, the scale is provided with a sliding groove on the other side, the scale on guide pin slides through the chute.

[0014]优选的,滑槽一端开口,另一端封闭。 [0014] Preferably, the open end of the chute, and the other end closed.

[0015]优选的,刻度尺的最小刻度是lmrn。 [0015] Preferably, the minimum scale is the scale lmrn.

[0016]优选的,刻度尺的纵向截面呈方形。 [0016] Preferably, the scale a longitudinal section of a square shape.

[0017]优选的,导针的针尖宽度小于导针不刻度尺连接的一侧的宽度。 [0017] Preferably, the tip is smaller than the width of the guide pin guide pin is not connected to a side of the width of the scale.

[0018]本申请全髋关节置换术中下肢长度测量仪,其在使用时,将套孔套设在股骨颈上, 通过旋转导针的位置,例如将导针指向大粗隆的顶点,可测量得知大粗隆的解剖线在顶点位置的旋转中心线相对于套孔不连接杆的连接角度的偏差值,该偏差值可体现在导针在亥度尺上指向的数据。 [0018] The present application total hip arthroplasty leg length measuring device, which, in use, the sleeve bore provided in the sleeve on the neck, the position of the rotary guide pin, the guide pin e.g. greater trochanter vertex point may be measuring anatomical trochanter line that the deviation of the angle value of the connection sleeve hole for the connecting rod is not in rotation centerline vertex positions, the offset value can be reflected in the data on a guide pin directed Hai graduated scale. 若导针在刻度尺上指向的数据是0,则说明大粗隆的解剖线的解剖角度不股骨头的旋转中心无偏差。 If the guide pin on the scale of the data points is 0, then the angle of the greater trochanter anatomical anatomy line is not the center of rotation of the femoral head without deviation. 本申请全髋关节置换术中下肢长度测量伩利用上述测量方式,可以测量得知大粗隆在解剖后的旋转中心的数据值,从而可不股骨头的旋转中心做对比,以确定是否需要加股。 This application total hip arthroplasty Xin limb length measurement using the measurement method, a data value that can be measured in the greater trochanter of the anatomical center of rotation, so that the rotation center of the femoral head may do comparison, to determine whether to add Unit . 通常情况下,股骨头是不髋关节未置换部分连接,其旋转中心即使在解剖后也通常不变,通常是45°。 Typically, the femoral head is not hip replacement part is not connected, the center of rotation generally unchanged even after dissection, typically 45 °. 因此,本申请测量仪仅需测量得知大粗隆的旋转中心、 数据,以便选择合适的股骨柄植入位置,或者确定是否加股,来达到两者统一的效果。 Accordingly, the present application measuring instrument that only the greater trochanter measuring rotational center, data to select the appropriate implant stem position, or whether the shares added to achieve both the effect of unity. 因此, 本申请全髋关节置换术中下肢长度测量仪可以有效解决切割后的股骨头和大粗隆的旋转中心是否在同一直线上的问题,为双下肢等长的最终效果提供一种新的解决方案。 Accordingly, the present application in total hip arthroplasty leg length measuring device can effectively solve the problem if the center of rotation of the femoral head and the greater trochanter of the cut in the same straight line, there is provided a new length for the final results of both lower extremities, etc. solution.

附图说明 BRIEF DESCRIPTION

[0019] 图1为本发明实施例1的全髋关节置换术中下肢长度测量仪的示意图; [0019] FIG. 1 is a schematic embodiment of a total hip replacement surgery limb length measuring device of the present embodiment of the invention;

[0020] 图2是图1的下肢长度测量仪的使用方式示意图。 [0020] FIG. 2 is a schematic view of use of the limb length measuring device 1 of FIG.

具体实施方式 Detailed ways

[0021] 为使本发明的目的、技术方案和优点更加清楚明白,下面将结合本发明实施方式中的附图,对本发明实施方式中的技术方案进行清楚、完整地描述,显然,所描述的实施方式仅仅是本发明一部分实施方式,而不是全部的实施方式。 [0021] To make the objectives, technical solutions, and advantages of the present invention will become apparent from the following with the present invention in the accompanying drawings, embodiments of the present invention the technical solution will be clearly and completely described, obviously, the described embodiments are merely part of embodiments of the present invention rather than all embodiments. 基于本发明中的实施方式,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式,都属于本发明保护的范围。 Based embodiment of the present invention, those of ordinary skill in the art to make all the other embodiments without creative work obtained by, fall within the scope of the present invention. 在不冲突的情况下,本发明中的实施方式及实施方式中的特征可以相互任意组合。 In case of no conflict, the embodiments of the present invention and the features of embodiment may be arbitrarily combined with each other.

[0022] 如图1和图2所示,图1为本发明实施例1的全髋关节置换术中下肢长度测量仪的示意图;图2是图1的下肢长度测量仪的使用方式示意图。 [0022] and FIG. 1, FIG. 2 is a schematic view of a total hip arthroplasty limb length measuring instrument according to an embodiment of the invention; FIG. 2 is a schematic view of use of the limb length measuring device of FIG. 图1和图2所示的实施方式全髋关节置换术中下肢长度测量仪,包括套孔1、连接杆2、刻度尺3和导针4;所述套孔1以45°角不连接杆2的一侧固定连接,连接杆2的另一侧不刻度尺3的一侧垂直连接,刻度尺3的另一侧不导针4垂直滑动连接。 Embodiment shown in FIG. 1 and FIG. 2 total hip arthroplasty leg length measuring instrument, comprising a sleeve bore, the connecting rod 2, the scale 3 and the guide pin 4; 1 the collet bore to the connecting rod angle is not 45 ° 2 is a side fixedly connected to the other side of the connecting rod 2 is not connected to the vertical side of the scale 3, the other side of the scale 3 is not connected to the guide pin 4 slides vertically.

[0023] 连接杆2不刻度尺3的连接位置位于刻度尺3的〇刻度处,并且套孔1的轴心线不连接杆2所在直线相交(如图1中虚线所示),相交的交点是套孔1的顶面圆心(如图2中虚线所示);刻度尺3的0刻度位于刻度尺3的中部位置处。 [0023] The connecting bar 2 is not connected to the scale 3 located at the position of the scale mark with 3 billion, and the sleeve ports are not connected to an axis of a straight line where the two intersecting bars (shown in broken line in FIG. 1), intersection point It is the top surface of the center hole sleeve 1 (as shown in dashed lines); scale 0 3 scale is located at the middle position of the scale 3.

[0024]刻度尺3的另一侧设置有滑槽,导针4通过滑槽在刻度尺3上滑动,滑槽一端开口, 另一端封闭;刻度尺3的最小刻度是lmra。 The other side of the [0024] 3 is provided with a slide scale, through the chute 4 slides the guide pin on the scale 3, chute open at one end and the other end closed; minimum scale of the scale 3 is lmra.

[0025]刻度尺3的纵向截面呈方形,优选导针4的针尖5宽度小于导针4不刻度尺3连接的一侧的宽度。 A longitudinal section [0025] of the square of the scale 3, the guide pin tip 5 is preferably smaller than the width of the guide pin 4 4 3 side of the width of the scale is not connected.

[0026]本申请实施方式全髋关节置换术中下肢长度测量仪,其在使用时,采用常用的手术入路髋关节后外侧入路,以大转子是中心的做一弧形切口,切开皮肤,皮下筋膜层,于股骨大转子止点处切断外旋肌,暴露关节囊同时并U型切开关节囊,术中在暴露髋关节的关节囊时,将关节囊不周围组织的粘连充分进行分离,同时充分切除多余的关节囊和滑膜。 [0026] The present application embodiment total hip arthroplasty leg length measuring device, which, in use, after the operation using the conventional approach hip lateral approach to the center of the greater trochanter is made a curved incision when the skin, the subcutaneous fascia, at the dead center of the femoral greater trochanter cutting outer rotators, while exposing the joint capsule and the U-shaped cut joint capsule, joint surgery exposed hip joint capsule, joint capsule surrounding tissue adhesions not sufficiently separated, while sufficiently removal of excess synovium and joint capsule. 将髋关节和膝关节充分屈曲,同时内收和内旋髋关节使股骨头后脱位。 The hip and knee flexion sufficiently, while adduction and internal rotation that the hip femoral head dislocation. 于小转子上方约1.5cm左右处行股骨颈截骨,用取头器取出股骨头。 Small about 1.5cm above the rotor at the femoral neck osteotomy line, taken with the femoral head is taken. 完全暴露出髋白,将髋白盂唇、圆韧带及增生的软组织组织逐步清理切除,如术中发现多余骨赘、骨渣,应立即去除,以免影响髋白假体杯的安放。 Fully exposed hip white, white will gradually clean up hip labrum, round ligament and soft tissue hyperplasia resection, intraoperative findings such as excess osteophytes, bone residue should be removed immediately, so as not to affect the placement of the hip prosthesis white cup. 选择用髋曰锉按照从小到大顺序,保持15度前倾和45度外展打磨髋白,反复检查磨削的深度,以确保内壁未被破坏,同时注意髋臼锉开口方向需要不髋臼开口方向保持一致, 显露出新鲜出血的软骨下骨床,并尽量保留住软骨下骨同时除去多余软组织。 Selecting said hip file in ascending order, to maintain 15 degrees forward and 45 show givers hip polished white, repeatedly checks the depth of grinding, to ensure that the inner wall is not damaged, while paying attention to the opening direction of the acetabular file need not acetabulum keeping the opening direction, revealing the fresh bleeding bone bed cartilage and subchondral bone as far as possible to retain the soft tissue while removing excess. 试模压迫以确定假体的匹配程度、不周围骨质覆盖情况以及假体的骨覆盖程度,安装髋臼假体,根据情况辅以螺钉固定,并测试假体的稳定性,将髋臼内所有碎屑清洗干净后安好聚乙烯内衬,取得满意的稳定性;然后显示股骨颈断端,然后采用髓腔锉保持15度的前倾角由小到大扩大股骨髓腔,安放股骨颈试模,将本申请的下肢长度测量仪的套孔1套设在股骨颈9上,通过旋转套孔1,调整导针4的位置,例如将导针4的针尖5指向大粗隆6的顶点,可测量得知大粗隆3 的解剖线的解剖角度不股骨头7的旋转中心的偏差值,也即股骨头7旋转中心相对于大粗隆6在股骨轴线上的高度之差,该偏差值可体现在导针4在刻度尺3上指向的数据。 Compression test mode to determine the extent of the bone prosthesis matching the degree of coverage, and coverage around the bone without a prosthesis, an acetabular prosthesis is mounted, in some cases supplemented by screws, and test the stability of the prosthesis within the acetabulum of the hip wash the well any debris polyethylene liner, to obtain satisfactory stability; neck stump is then displayed, then using canal file holding rake angle 15 degrees from small to large expansion femoral canal, femoral neck trial is placed mold, the sleeve ports limb length measuring device 1 of the present application is sleeved on the neck 9, to adjust the position of the guide pin holes by the rotation of sleeve 14, for example, the guide pin tip vertex point greater trochanter 4 5 6 , that measure an angle greater trochanter anatomical anatomy 3 line offset value is not the center of rotation of the femoral head 7, i.e. the rotation center of the femoral head 7 with respect to the difference in height between the axis of the greater trochanter of the femur 6, the deviation value may be reflected in the data points on the guide pin 4 on the scale 3. 若导针4在刻度尺3上指向的数据是0,则说明大粗隆6的解剖线的解剖角度不股骨头7的旋转中心的连接角度无偏差。 When the guide pin 4 on the scale 3 data points is 0, then the angle of the greater trochanter anatomical anatomy line 6 without the rotation center of the femoral head 7 connection angle unbiased. 本申请全髋关节置换术中下肢长度测量仪利用上述测量方式,可以测量得知大粗隆6在解剖后的旋转中心的数据值,从而可不股骨头7的旋转中心做对比,以便选择合适的股骨柄植入位置,或者确定是否需要加股。 This application total hip arthroplasty leg length measurement using the measuring instrument, that can measure 6 data value greater trochanter after anatomical center of rotation, so that the rotation center of the femoral head 7 may do comparison, to select the appropriate femoral stem implant position, or whether the need to increase stocks. 通常情况下,股骨头7是不髋关节未置换部分8连接,其旋转中心即使在解剖后也通常不变,是45°。 Typically, the femoral head 7 is not hip replacement section 8 is not connected to its center of rotation is generally unchanged even after dissection, was 45 °. 因此,本申请测量仪仅需测量得知大粗隆6的旋转中心数据,以便选择合适的股骨柄植入位置,或者确定是否加股,来达到两者统一的效果。 Accordingly, the present application measuring instrument that simply measuring the rotational center of the greater trochanter 6 data, in order to select the appropriate implant stem position, or whether the shares added to achieve both the effect of unity. 因此,本申请全髋关节置换术中下肢长度测量仪可以有效解决切割后的股骨头7和大粗隆6的旋转中心是否在同一直线上的问题,为双下肢等长的最终效果提供一种新的解决方案。 Accordingly, the present application in total hip arthroplasty leg length measuring device can effectively solve the problem if the rotation center of the femoral head and the greater trochanter 6 7 cut in the same straight line, there is provided a net effect of a long lower limb and the like the new solutions.

[0027]本发明实施方式优选采用连接杆不刻度尺的连接位置位于刻度尺的0刻度处,并且套孔的轴心线不连接杆所在直线相交,相交的交点是套孔的顶面圆心的设置方式,其可以促使刻度尺的0刻度位置对应的就是股骨头假体固定的旋转中心,在有偏差的情况下也可以直接得出股骨头旋转中心相对于大粗隆在股骨轴线上的高度之差值。 [0027] The embodiment of the present invention employ a preferred embodiment the scale 0 at the connection position without the connecting rod is positioned scale of the scale, and the axis of the sleeve bore where the connecting rod is not intersected intersection point is the top surface of the center hole of the sleeve arrangement, which may cause the femoral head is fixed to the rotation center of the scale corresponding to the scale position 0, in the case where a deviation may be directly obtained with respect to the rotational center of the femoral head height above the greater trochanter of the femur axis the difference.

[0028]本发明实施方式优选采用刻度尺的0刻度位于刻度尺的中部位置处的设置方式, 该设置方式可以促使本申请下肢长度测量仪应用范围更广,尤其是适用于大粗隆的解剖线的解剖角度不股骨头的旋转中心的存在正反不同偏离方向的情况。 [0028] The embodiment of the present invention employ a preferred embodiment graduated scale of 0 scale arrangement located at the middle position, the arrangement may cause the application scope of the present leg length gauge wider applications, especially for large anatomical trochanter the presence of positive and negative deviation direction different anatomical angle of the line is not the center of rotation of the femoral head.

[0029]本发明实施方式优选采用滑槽一端开口,另一端封闭。 [0029] The embodiment of the present invention employ a preferred embodiment chute open at one end and the other end closed. 该设置方式可以有效避免导针从刻度尺上滑脱下来。 This arrangement can effectively prevent the guide pin from slipping down on the scale.

[0030]以上仅是本发明的优选实施方式,应当指出的是,上述优选实施方式不应视为对本发明的限制,本发明的保^范围应当以权利要求所限定的范围为准。 [0030] The above are only preferred embodiments of the present invention, it should be noted that the above-described preferred embodiments should not be construed as limiting the present invention, the scope of protection of the present ^ invention reference should be made to the scope defined by the claims. 对于本技术领域的 For this art

Claims (9)

1. 全髋关节置换术中下肢长度测量仪,其特征在于:包括套孔、连接杆、刻度尺和导针; 所述套孔以45°角不连接杆的一侧固定连接,连接杆的另一侧不刻度尺的一侧垂直连接,刻度尺的另一侧不导针垂直滑动连接。 1. The total hip arthroplasty leg length measuring instrument, characterized by: a sleeve bore, the connecting rod, the scale and the guide pin; fixedly connected to the sleeve side aperture angle of 45 ° without the connecting rod, the connecting rod the other side is not connected to the scale of the vertical side, the other side of the scale is not vertically slidably connected to the guide pin.
2. 根据权利要求1所述的下肢长度测量仪,其特征在于:连接杆不刻度尺的连接位置位于刻度尺的〇刻度处,并且套孔的轴心线不连接杆所在直线相交。 Leg length according to claim 1 of the measuring device, wherein: the connecting rod at the connection position is not square scale graduated scale located scale, and the axis of the connecting rod sleeve hole is not located straight lines intersect.
3. 根据权利要求2所述的下肢长度测量仪,其特征在于:套孔的轴心线不连接杆所在直线相交的交点是套孔的顶面圆心。 According to claim limb length measuring device of claim 2, wherein: the axis line of the connecting rod sleeve hole is not straight where the intersection point is the center of the top surface of the collet bore.
4. 根据权利要求1所述的下肢长度测量仪,其特征在于:刻度尺的0刻度位于刻度尺的中部位置处。 Leg length according to claim 1 of the measuring device, wherein: the scale of the scale located at the center position 0 of the scale.
5. 根据权利要求1所述的下肢长度测量仪,其特征在于:刻度尺的另一侧设置有滑槽, 导针通过滑槽在刻度尺上滑动。 5. The leg length measuring device as claimed in claim 1, wherein: the other side of the chute is provided with a scale, the scale on guide pin slides through the chute.
6. 根据权利要求5所述的下肢长度测量仪,其特征在于:滑槽一端开口,另一端封闭。 The length measuring device as claimed in claim 5 of the lower extremity, characterized in that: the chute open at one end and the other end closed.
7. 根据权利要求1所述的下肢长度测量伩,其特征在于:刻度尺的最小刻度是1mm。 According to claim lower extremity of the length measuring Xin 1, wherein: the scale minimum scale is 1mm.
8. 根据权利要求1所述的下肢长度测量仪,其特征在于:刻度尺的纵向截面呈方形。 Leg length according to claim 1 of the measuring device, wherein: the scale a longitudinal section of a square shape.
9. 根据权利要求1所述的下肢长度测量仪,其特征在于:导针的针尖宽度小于导针不刻度尺连接的一侧的宽度。 Leg length according to claim 1 of the measuring device, characterized in that: the guide pin tip width smaller than the width of the side guide pin is not connected to the scale.
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