CN209236393U - Femur measurement device - Google Patents

Abstract

The utility model relates to a kind of femur measurement devices.The femur measurement device includes scale plate for measuring the main body of femoral size, being rotatably connected with main body and the locking mechanism connecting with main body.Wherein, scale plate has rotation center, is provided with first positioning hole and second location hole on scale plate, and first positioning hole and the relative distance of second location hole to rotation center are fixed.Locking mechanism can be clamped with scale plate, to fix the rotation angle of scale plate.Above-mentioned femur measurement device is kept fixed due to the distance of rotation center to first positioning hole and second location hole, to eliminate it is traditional because rotation center to location hole distance changes with femoral size change caused by location hole deviations, and then osteotomy and prosthese are installed and are made mistakes caused by avoiding because of location hole deviation.

Description

Femur measurement device

Technical field

The utility model relates to the field of medical instrument technology, more particularly to a kind of femur measurement device.

Background technique

Total knee arthroplasty is to treat effective treatment of knee joint trauma and disease one of to perform the operation, the operation be by Patient's knee joint patient affected part carries out corresponding osteotomy and implantable artificial articular prosthesis to replace original knee joint, to reach recovery Function of joint and the purpose for alleviating slight illness.Therefore, it needs to carry out accurate osteotomy during total knee arthroplasty carries out, to It is adapted to the installation of prosthese.Specifically, femoral prosthesis passes through femoral size with the offer of series of standards size, total knee arthroplasty Measurement guide plate measures femoral-posterior condyles to femur front side cortex distance to determine corresponding prosthesis size, and it is special to be then based on femur anatomy It levies and determines an outer swing angle, location hole is aligned with rotating femoral sizing guide plate, and then determine subsequent osteotomy orientation.

The correct selection of prosthesis size and prosthese are properly positioned relative to natural bone for the joint that ensures to assemble Natural movement and surrounding soft tissue balance great meaning.However, the skeletal size shape of different patients is not quite similar, to positioning The outer swing angle that hole rotates needed for being aligned is not also identical, therefore femoral sizing guide plate needs to guarantee the accurate of femoral size Measurement, and allow doctor that can select suitable rotational positioning angle according to the demand of different patients, thus more accurate osteotomy And place femoral prosthesis.

Utility model content

Based on this, it is necessary in view of the above-mentioned problems, providing a kind of femur measurement device.

A kind of femur measurement device, comprising:

Main body, for measuring femoral size；

Scale plate has rotation center, and the scale plate is rotatably connected by the rotation center and the main body, institute It states and is provided with first positioning hole and second location hole on scale plate, the first positioning hole and the second location hole to institute The relative distance for stating rotation center is fixed；And

Locking mechanism is connect with the main body, and locking mechanism can be clamped with scale plate, with the rotation of the fixation scale plate Angle.

Above-mentioned femur measurement device since the distance of rotation center to first positioning hole and second location hole is kept fixed, To eliminate it is traditional because rotation center to location hole distance with femoral size change due to change caused by location hole positioning Deviation, and then osteotomy and prosthese installation fault caused by avoiding because of location hole deviation.

The first rotary shaft hole is offered on the scale plate in one of the embodiments, the main body offers second Rotary shaft hole, first rotary shaft hole are connected to second rotary shaft hole, the first rotary shaft hole and second rotary shaft Rotary shaft is equipped in hole, the rotary shaft is the rotation center.

It is provided on the scale plate in one of the embodiments, to the more of the rotation angle of measuring the scale plate A angle index, multiple card slots are also provided on the scale plate, and each corresponding angle index of the card slot is described Latch is provided on locking mechanism, the latch can be clamped with the card slot, with the rotation angle of the fixation scale plate.

The locking mechanism includes: in one of the embodiments,

Locking button, one end are provided with the latch；

Elastic component is set to the other end of the locking button, and the both ends of the elastic component are separately connected the bullet Property part and the main body,

Spacer pin is set between the latch and the elastic component, the locking button is connected to the master On body, the locking button can be rotated around the spacer pin, so that the latch is clamped or separates with the card slot.

The main body includes: in one of the embodiments,

Guide plate cuts off face for being connected to distal femur, offers guide runner on the guide plate；

Probe assembly is set to one end of the guide plate, for abutting cortex climbing point on front side of femur；

Postartis baffle, is set to the other end of the guide plate, and the postartis baffle includes vertically disposed stabilizer blade and stands Column, for abutting femoral-posterior condyles high point, the column is slidably matched the stabilizer blade with the guide runner, so that the postartis is kept off Plate can do the movement close to or far from the probe assembly, and the multiple tracks to measure the femoral size is provided on the column Graduation mark, the femoral size are the distance that cortex climbing point arrives femoral-posterior condyles high point on front side of the femur.

The first through slot through the guide runner is also provided on guide plate in one of the embodiments, described first is logical The reference line with graduation mark cooperation is provided with by slot.

The quantity of the guide runner is two in one of the embodiments, and two guide runners are respectively arranged at described lead At left and right sides of plate, the quantity of the column is also two, and described two columns are threaded through respectively in two guide runners.

Lock hole is provided on the column in one of the embodiments, is equipped in the lock hole to by institute Postartis Fender lock is stated due to the fastener on the guide plate.

The probe assembly includes probe and probe base in one of the embodiments, is offered on the probe base Probe aperture, the probe are threaded through in the probe aperture, and one end of the probe base and the guide plate is rotatably connected.

One end of the guide plate offers probe bore in one of the embodiments, and the probe base is arranged in probe In bore, annular groove is offered on the probe base, pin hole is also provided on the guide plate, and the pin hole and the probe bore connect It is logical, finite place piece is worn in the pin hole, the locating part and the annular groove are clamped, to carry out bound to the probe base Position.

Femur measurement device provided by the utility model is given doctor in prosthese rotational positioning and is more selected, and allows to cure The raw outer swing angle of flexible modulation, so as to more accurately osteotomy and places femoral prosthesis.Further, provided by the utility model Femur measuring device makes rotation center keep relatively fixed at a distance from first positioning hole and second location hole, that is, stretch or When shrinking the main body of femur measurement device, rotation center is moved together with first positioning hole and second location hole, to avoid The problem of osteotomy deviations caused by a positioning hole and second location hole to rotation center distance change, and then avoid Because osteotomy and prosthese installation fault, reduce the postoperative complications of total knee replacement operation caused by deviations Generation.Furthermore femur assay device structures provided by the utility model are simple, simplify design structure that outer swing angle is adjusted and Usage mode can reduce in previous femur measurement device and hold for the screw thread tightened-up structure of fixed outer swing angle or tiny latch Easily during being used for a long time the problem of wear-out failure.

Detailed description of the invention

Fig. 1 is the Structure explosion diagram of the femur measurement device of an embodiment；

Fig. 2 is that the outer swing angle of femur measurement device shown in Fig. 1 adjusts schematic diagram；

Fig. 3 is the cross-sectional view of the section B-B of femur measurement device shown in Fig. 2.

Specific embodiment

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this The specific embodiment of utility model is described in detail.Many details are explained in the following description in order to abundant Understand the utility model.But the utility model can be implemented with being much different from other way described herein, this field Technical staff can do similar improvement without prejudice to the utility model connotation, therefore the utility model is not by following public affairs The limitation for the specific implementation opened.

It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to To another element or it may be simultaneously present centering elements.

Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes Any and all combinations of one or more related listed items.

Referring to figures 1-3, the embodiment of the present application provides a kind of femur measurement device 100, in total knee replacement hand Dimensional measurement is carried out to femur in art and true position is carried out to location hole.Specifically, femur measurement device 100 include main body 110, Scale plate 120 and locking mechanism 130.Wherein, main body 110 is used to measure the size of femur 200, i.e., for measuring on front side of femur Cortex climbing point 210 arrives the distance AP of femoral-posterior condyles high point 220, and then determines the size of corresponding prosthese.

Scale plate 120 is for positioning location hole, with the subsequent osteotomy orientation of determination and prosthese relative to natural bone Rotational positioning.Specifically, scale plate 120 has rotation center 1201, and scale plate 120 passes through rotation center 1201 and main body 110 are rotatably connected.First positioning hole 122 and second location hole 123 are provided on scale plate 120, so that doctor can pass through Scale plate 120 is rotated, first positioning hole 122 and second location hole 123 is driven to deflect past certain outer swing angle, until the first positioning The line of centres of hole 122 and second location hole 123 perpendicular to femur Whiteside's line, that is, coaster minimum point with it is intercondylar The line of nest highest point, and then determine the position of first positioning hole 122 and second location hole 123.Further, the first positioning The relative distance of hole 122 and second location hole 123 to rotation center 1201 is fixed, i.e., no matter how femur size dimension changes Become, the relative distance of first positioning hole 122 and second location hole 123 to rotation center 1201 remains constant, to subtract Few position error.

Locking mechanism 130 is connect with main body 110, and locking mechanism 130 can be clamped with scale plate 120, to fix scale plate 120 Rotation angle, and then doctor is facilitated to stamp locating pin in first positioning hole 122 and second location hole 123.

Scale plate free to rotate is arranged on the mainboard 110 of measurement femoral size in above-mentioned femur measurement device 100 120, and scale plate has first positioning hole 122 and second location hole 123.And in traditional femur measurement device, lead to The mode of offer multiple groups positioning nail hole is crossed to realize the adjusting of outer swing angle, i.e., it is different to pass through several groups of angles of offer in traditional scheme Nail hole is positioned, doctor selects most suitable positioning nail hole group from several groups of fixed locating pin angle of spot holes according to the demand of patient, with Determine prosthese rotational positioning, such scheme China and foreign countries swing angle adjustable range is smaller, for fear of the size of nail hole, so every group of locating pin The angle at hole interval is also larger, it is difficult to realize accurate adjusting and positioning.And the scheme of the application can give in prosthese rotational positioning With the more flexibilities of doctor, i.e. the femur measurement device 100 of the embodiment of the present application can freely be adjusted by rotating scale plate 120 Outer swing angle so as to be supplied to doctor's more outer swing angle selection, and then determines most accurate first positioning hole 122 and second 123 position of location hole.Further, in the traditional femur measurement device of other, often by the fixed Mr. Yu of rotation center Place, but positioning nail hole can be remote from small to large and increasingly with femoral size to fixed rotation center distance, so that in different stocks In bone size, even if positioning nail hole, which swings equal angular around rotation center, also brings along osteotomy deviations.And the application's In scheme, the first positioning hole 122 and second location hole 123 of bone measurement device 100 relative to rotation center distance always It is kept fixed, so as to avoid the location hole deviations generated because femoral size changes when outer swing angle is adjusted, and then keeps away Osteotomy and prosthese installation fault caused by having exempted from because of location hole deviation.

Specifically, the first rotary shaft hole 121 is offered on scale plate 120 in one of the embodiments, main body 110 is opened Equipped with the second rotary shaft hole 1111, and the first rotary shaft hole 121 is connected to the second rotary shaft hole 1111.In the first rotary shaft It is equipped with rotary shaft 124 in hole 121 and the second rotary shaft hole 1111, so that scale plate 120 can be rotation center with rotary shaft 124 It is rotated relative to main body 110.Further, rotary shaft 124 connects by the way that screw thread, welding or other modes and main body 110 are fixed It connects.

Further, first positioning hole 122 and second location hole 123 are symmetrically disposed on a left side for the first rotary shaft hole 121 Right two sides.Specifically, first positioning hole 122, second location hole 123 and the first rotary shaft hole in one of the embodiments, 121 center is located along the same line.Further, reference line 128 is additionally provided on scale plate 120, reference line 128 coincides with The line of centres of first positioning hole 122 and second location hole 123 rotates through centainly so that doctor be facilitated to observe scale plate 120 Whether the line of centres of first positioning hole 122 and second location hole 123 is perpendicular to femur 200 after outer swing angle Whiteside's line.Specifically, reference line 128 can be by carving or being printed on scale plate 120.

Further, it is provided with the first hollow out window 125 on scale plate 120, the second hollow out window is provided in main body 110 1112, and the first hollow out window 125 is connected to the second hollow out window 1112, to pass through the first hollow out window 125 and the second hollow out window 1112 can be directly observed the Whiteside's line of femur 200.

Specifically, the first protrusion 1261 and the second protrusion are additionally provided on scale plate 120 in one of the embodiments, 1262, after scale plate 120 is connected to main body 110, main body 110 is located between the first protrusion 1261 and the second protrusion 1262, To play left and right position-limiting action to scale plate 120, prevent the rotation amplitude of scale plate 120 excessive.Further, first is fixed The first protrusion 1261 is run through in position hole 122, and second location hole 123 runs through the second protrusion 1262.First protrusion 1262 can lengthen First positioning hole 122, the second protrusion 1262 can lengthen second location hole 123.To pass through first positioning hole 122 and second When location hole 123 beats locating pin to femur 200, first positioning hole 122 and second location hole 123 play guiding role, lengthen First positioning hole 122 and second location hole 123 afterwards can effectively prevent locating pin off-track.

Specifically, only multiple angle indexes 1272 are also set on scale plate 120, the angle index 1272 is for measuring scale The outer swing angle that the line of centres of the rotation angle of plate 120, i.e. first positioning hole 122 and second location hole 123 is turned over.Further Ground, often turning over an outer swing angle has corresponding angle index 1272 to indicate, so that doctor be facilitated to record.More into one Step ground, doctor can pass through medical image and be predefined based on femur anatomical features and be suffered from total knee replacement operation consent The outer swing angle rotated needed for the location hole of person is at the time of surgery, directly rotated scale plate 120 to default by angle index 1272 Outer swing angle, and be finely adjusted, only sentence with the Whiteside's line of observation femur 200 so as to avoid doctor on this basis Disconnected first positioning hole 122 and the whether true position of second location hole 123, improve reliability of positioning, reduce operating difficulty.

Further, multiple card slots 1271, and the corresponding angle of each card slot 1271 are also provided on scale plate 120 Scale 1272.Specifically, latch 1311 is provided on locking mechanism 130, latch 1311 can be clamped with card slot 1271, thus fixed The rotation angle of scale plate 120.Further, straight line where the extending direction of multiple card slots 1271 converges at scale plate 120 Rotation center 1201.

Specifically, locking mechanism 130 includes locking button 131, elastic component 132 and limit in one of the embodiments, Position pin 133.Wherein, latch 1311 is set to one end of locking button 131, and the another of locking button is arranged in elastic component 132 End, and the both ends of elastic component 132 are separately connected locking button 131 and main body 110.Specifically, locking button 131 offers First counterbore 1312 offers the second counterbore 1113 in main body 110, and the first counterbore 1312 is set in opposite directions with the second counterbore 1312 It sets, so that a cavity can be collectively formed in the first counterbore 1312 and the second counterbore 1312, elastic component 132 is set in cavity.Into One step, elastic component 132 is spring.

Spacer pin 133 is set between latch 1311 and elastic component 132, locking button 131 is connected to main body 110 On.Specifically, the middle part of locking button 131 is provided with the first pin shaft hole 1331, and the two of the second hollow out window 1112 of main body 110 The second pin shaft hole 1114 is offered on side wall, spacer pin 133 is threaded through in the first pin shaft hole 1331, and spacer pin 133 Both ends are fixed in the second pin shaft hole 1114 by interference fit, welding or other modes, so that 131 energy of locking button It is rotated around spacer pin 133.Further, there is press surface 1313, press surface 1313 and elastic component 132 are right in locking button 131 It answers, pressure-locking the press surface 1313 on key 131 can be such that elastic component 132 compresses, and pass through the leverage of spacer pin 133, So that latch 1311 is separated with card slot 1271, to unlock locking effect.Press surface 1313 is unclamped, elastic component 132 is due to elastic force Effect is replied, and by leverage, latch 1311 is clamped again with card slot 1271.

It should be noted that scale plate 120 can also be locked by other means, such as in another embodiment In, first through hole is offered on scale plate 120, and multiple the of the rotation angle of corresponding scale plate 120 are offered in main body 110 Two through-holes are threaded through in first through hole and some second through-hole by connector, such as pin, fix scale plate 120 with this Rotate angle.

Specifically, the dimensional measurement of femur is by the way of preceding reference in one of the embodiments, i.e., for different rulers The distance H of very little femur, first positioning hole 122 or second location hole 123 to cortex climbing point 210 on front side of femur is identical.Tool Body, main body 110 includes guide plate 111, postartis baffle 112 and probe assembly 113.Wherein, guide plate 111 is for being connected to femur Distal end is cut off on face, i.e. one end of the separate heart of femur 200.Scale plate 120 is rotatably arranged in by rotary shaft 124 On guide plate 111.Probe assembly 113 is set to one end of guide plate 111, for abutting cortex climbing point 210 on front side of femur.Femur The vertical range of front side cortex climbing 210 to rotary shaft 124 of point is always kept in a fixed state.Guide plate 111 is arranged in postartis baffle 112 The other end, postartis baffle 112 include column 1121 and stabilizer blade 1122, and stabilizer blade 1122 is for being connected to femoral-posterior condyles high point 220 On.Specifically, guide runner 1115 is offered on guide plate 111, column 1121 is threaded through in guide runner 1115, so that column 1121 are slidably matched with guide runner 1115, and then so that postartis baffle 112 can do the fortune close to or far from probe assembly 1113 Dynamic, to measure the size of femur 200, i.e., cortex climbing point 210 arrives the distance AP of femoral-posterior condyles high point 220 on front side of femur.

Further, it is provided with multiple tracks graduation mark 1124 on column 1121, to measure femoral size.Further, It is also provided with the first through slot 1116 through guide runner 1115 on guide plate 111, can be directly observed by the first through slot 1116 Graduation mark 1124 on column 1121.And the reference line 1119 cooperated with graduation mark 1124 is provided with by the first through slot 1116, To pass through the relative position of reference line 1119 and graduation mark 1124, the correspondence numerical value of the graduation mark 1124 of reading, and then obtain The size of femur 200.

Specifically, guide runner 1115 is two in one of the embodiments, and two guide runners 1115 are respectively arranged at and lead 111 left and right sides of plate, to be also two, two columns 1121 are threaded through in two guide runners 1115 column 1121 respectively, thus The double swerve in sliding process of postartis baffle 112 is prevented, the stability in measurement process is improved.Accordingly, postartis baffle 112 stabilizer blade 1122 is also two, and two stabilizer blades 1122 are connected to respectively in two femoral-posterior condyles high points 220.

Specifically, it is provided with lock hole 1125 on the column 1121 of postartis baffle 112, what is be equipped in lock hole 1125 is tight Firmware 140, to postartis baffle 112 is locked on guide plate after regulating postartis baffle 112, with convenient reading graduation mark Numerical value on 1124.Specifically, lock hole 1125 is threaded hole, and fastener 140 includes fastening bolt and knob, is revolved by rotation Button may make fastening bolt to hold out against guide plate 111, to lock postartis baffle 112.

Further, it is also provided with handle hole 1123 on postartis baffle 112, specifically, is provided with spiral shell in handle hole 1123 Line, to cooperate with all kinds of threaded handles, to facilitate doctor to grasp or assist resected femur measuring device 100.

Specifically, probe assembly 113 includes probe 1131 and probe base 1132 in one of the embodiments,.Its In, one end of probe 1131 is for being connected to cortex climbing point 210 on front side of femur.Probe aperture is offered on probe base 1132 1133, probe 1131 is threaded through in probe aperture 1133, so that probe 1131 can be moved forward and backward.Further, probe base 1132 are rotatably connected with one end of guide plate 111, so that probe 1131 can circumferentially rotate, and then are directed to the stock of different patients Bone accurately finds cortex climbing point 210 on front side of femur by adjusting 1131 front and back of probe and circumferential position.

Specifically, one end of guide plate 111 offers probe bore 1117, and probe base 1132 is arranged in probe bore 1117 It is interior, so that probe base 1132 can drive probe 1131 to circumferentially rotate.Further, annular groove is offered on probe base 1132 1134, pin hole 1118 is offered on guide plate 1111, and pin hole 1118 is connected to probe bore 1117, is equipped in pin hole 1118 Locating part (not shown), locating part passes through pin hole 1118 and is clamped with annular groove 1134, to carry out bound to probe base 1132 Position.

Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, all should be considered as described in this specification.

Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed, But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.

Claims (10)

1. a kind of femur measurement device characterized by comprising

Main body, for measuring femoral size；

Scale plate has rotation center, and the scale plate is rotatably connected by the rotation center and the main body, the quarter First positioning hole and second location hole are provided on degree plate, the first positioning hole and the second location hole to the rotation The relative distance for turning center is fixed；

Locking mechanism is connect with the main body, and the locking mechanism can be clamped with the scale plate, with the fixation scale plate Rotate angle.

2. femur measurement device according to claim 1, which is characterized in that offer the first rotary shaft on the scale plate Hole, the main body offer the second rotary shaft hole, and first rotary shaft hole is connected to second rotary shaft hole, the first rotation Rotary shaft is equipped in axis hole and second rotary shaft hole, the rotary shaft is the rotation center.

3. femur measurement device according to claim 1, which is characterized in that be provided on the scale plate to measure Multiple angle indexes of the rotation angle of scale plate are stated, multiple card slots, each card slot pair are also provided on the scale plate The angle index is answered, latch is provided on the locking mechanism, the latch can be clamped with the card slot, to fix State the rotation angle of scale plate.

4. according to femur measurement device as claimed in claim 3, which is characterized in that the locking mechanism includes:

Locking button, one end are provided with the latch；

Elastic component is set to the other end of the locking button, and the both ends of the elastic component are separately connected the elastic component And the main body；

Spacer pin is set between the latch and the elastic component, the locking button to be connected in the main body, The locking button can be rotated around the spacer pin, so that the latch is clamped or separates with the card slot.

5. femur measurement device according to claim 1, which is characterized in that the main body includes:

Guide plate cuts off face for being connected to distal femur, offers guide runner on the guide plate；

Probe assembly is set to one end of the guide plate, for being connected to cortex climbing point on front side of femur；

Postartis baffle, is set to the other end of the guide plate, and the postartis baffle includes vertically disposed stabilizer blade and column, institute Stabilizer blade is stated for being connected to femoral-posterior condyles high point, the column is slidably matched with the guide runner, so that the postartis is kept off Plate can do the movement close to or far from the probe assembly, and the multiple tracks to measure the femoral size is provided on the column Graduation mark, the femoral size are the distance that cortex climbing point arrives femoral-posterior condyles high point on front side of the femur.

6. femur measurement device according to claim 5, which is characterized in that be also provided on guide plate through the guide runner The first through slot, the reference line with graduation mark cooperation is provided with by first through slot.

7. femur measurement device according to claim 5, which is characterized in that the quantity of the guide runner is two, two Guide runner is respectively arranged at left and right sides of the guide plate, and the quantity of the column is also two, and described two columns are worn respectively In two guide runners.

8. the femur measurement device according to claim 5 or 7, which is characterized in that be provided with lock hole, institute on the column It states and is equipped in lock hole the postartis Fender lock to be scheduled to the fastener on the guide plate.

9. femur measurement device according to claim 5, which is characterized in that the probe assembly includes probe and probe , probe aperture is offered on the probe base, the probe is threaded through in the probe aperture, the probe base and the guide plate One end is rotatably connected.

10. femur measurement device according to claim 9, which is characterized in that one end of the guide plate offers probe base Hole, the probe base are arranged in probe bore, annular groove are offered on the probe base, is also provided with pin hole on the guide plate, The pin hole is connected to the probe bore, and finite place piece is worn in the pin hole, and the locating part and the annular groove are clamped, with Limit up and down is carried out to the probe base.