CN107693087B - Pendulum saw for osteotomy - Google Patents
Pendulum saw for osteotomy Download PDFInfo
- Publication number
- CN107693087B CN107693087B CN201711082982.3A CN201711082982A CN107693087B CN 107693087 B CN107693087 B CN 107693087B CN 201711082982 A CN201711082982 A CN 201711082982A CN 107693087 B CN107693087 B CN 107693087B
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- saw
- pivot
- saw blade
- blade
- pendulum
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- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 230000033001 locomotion Effects 0.000 claims description 7
- 210000000988 bone and bone Anatomy 0.000 description 6
- 230000001133 acceleration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000399 orthopedic effect Effects 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 239000012620 biological material Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035790 physiological processes and functions Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/14—Surgical saws ; Accessories therefor
- A61B17/142—Surgical saws ; Accessories therefor with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00367—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
- A61B2017/00398—Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like using powered actuators, e.g. stepper motors, solenoids
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Dentistry (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The present application provides a pendulum saw for osteotomy, comprising: a first saw blade including a first saw blade portion and a first body portion, and pivotally mounted about a first pivot axis; a second saw blade including a second saw blade portion and a second body portion, and pivotally mounted about a second pivot axis; a transmission mechanism configured to reciprocate the first saw blade and the second saw blade; and a power source that provides power to the transmission mechanism; wherein the first and second saw blades are configured to reciprocally oscillate at the same sawing speed in opposite directions at the first and second saw blade portions when cutting. The swing saw can improve the osteotomy efficiency, save time, has good stability and has a relatively simple structure when being used for osteotomy.
Description
Technical Field
The application relates to a medical instrument for orthopedic surgery, in particular to an osteotomy tool for joint replacement.
Background
Artificial joint replacement is an orthopedic operation that replaces a diseased joint of a human body with an artificial biological material and restores normal physiological functions of the joint. In surgery, a physician needs to characterize an osteotomy of a patient's joint to match an artificial joint prosthesis.
In joint osteotomy procedures, a pendulum saw is generally used to perform the following operations: firstly, arranging an osteotomy guiding tool on bones; mounting a pendulum saw blade on a power source; then the saw blade of the swing saw is inserted into a guide groove of the osteotomy guiding tool; after the power source is electrified, the swing saw blade is operated to cut bones along the guide groove; after the osteotomy is completed, the power source is powered off, and then the pendulum saw blade is taken out of the guide groove.
The current pendulum saw used in the joint osteotomy is mainly a single-blade pendulum saw, and although the appearance is slightly different, strong unidirectional acceleration is generated at the saw blade position of the pendulum saw blade at the moment of power supply energizing. Therefore, at the moment that the pendulum saw blade contacts the bone to be cut, strong reverse impact force can be generated at the handheld position, the impact force can directly lead to unstable hand of an operator, the position of the saw blade is extremely easy to deviate, the saw blade is blocked in the guide groove, or the osteotomy surface is uneven, the osteotomy efficiency of the pendulum saw is reduced, and the osteotomy operation is failed and needs to be tried for many times and the operation time is delayed. Meanwhile, the pendulum saw also increases the requirement on the usability of doctors.
Therefore, there is a need for a pendulum saw that can quickly, accurately, and stably perform osteotomies.
Disclosure of Invention
The present application aims to overcome at least one or more of the problems of the prior pendulum saw, and to propose an improved osteotomy tool which enables a quick, accurate and stable osteotomy.
To this end, according to an aspect of the present application, there is provided a pendulum saw for osteotomy, comprising:
a first saw blade comprising a first saw blade portion and a first body portion, and the first saw blade being pivotally mounted about a first pivot axis;
a second saw blade including a second saw blade portion and a second body portion, the second saw blade pivotally mounted about a second pivot axis;
a transmission mechanism configured to reciprocate the first saw blade and the second saw blade; and
the power source provides power for the transmission mechanism;
wherein the first and second saw blades are configured to reciprocally oscillate at the same sawing speed in opposite directions when cutting is performed.
Preferably, the first saw blade portion and the second saw blade portion oscillate reciprocally with the same movement parameters except for the direction when cutting is performed.
Preferably, the strokes of the first and second saw blade portions overlap and do not separate when making the cut.
Preferably, the hinge positions of the first and second pivots on the first and second saw blades, respectively, are adjustable.
Preferably, the first pivot and the second pivot are the same fixed pivot, which is fixed to the housing of the pendulum saw.
Preferably, the transmission mechanism includes a first link, a second link and a driving part, one end of the first link is pivotally hinged with the first body portion of the first saw blade through a third pivot, the other end of the first link is pivotally hinged with the driving part through a fourth pivot, and one end of the second link is pivotally hinged with the second body portion of the second saw blade through a fifth pivot, and the other end of the second link is pivotally hinged with the driving part through a sixth pivot.
Preferably, the driving part reciprocally rotates about its rotation center.
Preferably, the driving part reciprocates in a straight line.
Preferably, the fourth pivot and the sixth pivot are the same pivot.
Preferably, the pendulum saw further comprises a handle, a power cord or a battery.
The swing saw is connected with a power source through the double saw blades, so that the osteotomy is performed, the osteotomy efficiency can be improved, the time is saved, the stability is good, and the structure is relatively simple.
Drawings
Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings, and it should be understood that the embodiments described below are only for explaining the present application, and do not limit the scope of the present application, wherein:
FIG. 1 is a schematic diagram illustrating a pendulum saw according to one embodiment of the present application;
fig. 2 is a schematic diagram illustrating a pendulum saw according to another embodiment of the present application.
Detailed Description
Preferred embodiments of the present application are described in detail below with reference to examples. However, those skilled in the art will appreciate that these exemplary embodiments are not meant to be limiting in any way. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict. In the drawings, other components are omitted for brevity, but this does not indicate that the pendulum saw of the present application may not include other components.
Referring to fig. 1 and 2, fig. 1 and 2 show two exemplary embodiments of the application, respectively, wherein different transmission mechanisms are shown. As shown in fig. 1 and 2, the pendulum saw for osteotomy of the present application includes a first saw blade 10 and a second saw blade 20, wherein the first saw blade 10 includes a first saw blade portion 11 and a first body portion 12, and the second saw blade 20 includes a second saw blade portion 21 and a second body portion 22. The first blade 10 and the second blade 20 are pivotally mounted about respective first and second pivot axes, respectively. It should be noted that in fig. 1 and 2, the first blade 10 and the second blade 20 are shown as being pivotally mounted about the same fixed pivot 30, but the first blade 10 and the second blade 20 may be pivotally mounted about respective first and second pivots, respectively. Thus, the first pivot and the second pivot may be two separate components or may be the same single component.
The pendulum saw of the present application further comprises a transmission mechanism 40 and a power source (not shown in the figures), wherein the transmission mechanism 40 is configured to pendulum the first saw blade 10 and the second saw blade 20 for cutting, and the power source provides power to the transmission mechanism 40. When cutting is performed, the first saw blade 10 and the second saw blade 20 are respectively swung about the respective pivots by the driving mechanism 40, so that the first saw blade portion 11 and the second saw blade portion 12 are reciprocally swung in opposite directions on the bone at the same sawing speed.
According to an embodiment, the first saw blade portion 11 and the second saw blade portion 21 may oscillate reciprocally with the same movement parameters except for the direction when cutting. The motion parameters include sawing speed, acceleration, sawing displacement, sawing feed and the like. According to another embodiment, the strokes of the first 11 and second 21 saw blade portions may be superimposed crosswise and not separated when cutting is performed. In this way, the pendulum saw can ensure that the instant acting force generated by a single saw blade is equivalent to the instant acting force generated by another saw blade in the cutting process, so that the instant acting force can be internally counteracted. Therefore, the position of the pendulum saw can be kept stable without being influenced by impact force.
According to another embodiment, the respective hinge positions of the first and second pivots on the first and second saw blades 10, 20 are adjustable. For example, a plurality of holes for the first and second pivot hinges are provided on the first and second saw blades 10 and 20, respectively. When the hinge positions of the first and second pivots are adjusted to positions away from the respective saw blade portions (i.e., are hinged in holes away from the respective saw blade portions), respectively, the swing amplitude of the saw blade portions becomes larger, and vice versa. In the case where the first and second pivots are the same fixed pivot 30, the fixed pivot 30 may be hinged to corresponding holes in the first and second saw blades 10, 20. In general, the first pivot and the second pivot (or fixed pivot 30) may be fixed to the housing 31 of the pendulum saw to constrain the motion of the pendulum saw to a greater extent.
As shown in fig. 1, a specific transmission mechanism is shown, the transmission mechanism 40 comprising a first link 41, a second link 42 and a driving member 50, one end of the first link 41 being pivotally hinged to the first body portion 12 of the first saw blade 10 (e.g., at an end of the first saw blade 10 remote from the first blade portion 11) by a third pivot 13, and the other end of the first link 41 being pivotally hinged to the driving member 50 by a fourth pivot 51, and one end of the second link 42 being pivotally hinged to the second body portion 22 of the second saw blade 20 (e.g., at an end of the second saw blade 20 remote from the second blade portion 21) by a fifth pivot 23, and the other end of the second link 42 being pivotally hinged to the driving member 50 by a sixth pivot 52. It should be noted that in fig. 1, the fourth pivot 51 and the sixth pivot 52 are shown as two different pivots and are located at different positions of the driving member 50. However, the fourth pivot 51 and the sixth pivot 52 may be the same pivot. In fig. 1, the driving member 50 is a rotating member, such as a driving wheel, which can reciprocally rotate about a rotation center, as indicated by an arrow in fig. 1. The first link 41 and the second link 42 may be hinged in the circumferential direction on the driving part 50, and the two hinge positions may be separated by a certain angle, for example, 90 °. Of course, the lengths of the first and second links 41 and 42 may be different according to different hinge positions.
Fig. 2 shows a further specific transmission which differs from the transmission shown in fig. 1 at least in respect of the drive components. In fig. 2, the first link 41 and the second link 42 are pivotally hinged to the driving part 60 by the same pivot 61. Of course, the first and second links 41 and 42 may also be pivotally hinged to the driving member 60 by respective fourth and sixth pivots 51 and 52. In fig. 2, the driving part 60 is a sliding part, for example, a crank block, which can reciprocate in a straight line, as indicated by an arrow in fig. 2.
The above-described transmission is merely an example. It should be understood that the transmission mechanism of the present application may be any transmission mechanism that enables the saw blade portions of the two saw blades to cut in opposite directions at the same sawing speed, e.g., a linkage, cam linkage, gear mechanism, etc. Because these drive mechanisms are known in the art, they are not described in detail herein.
In addition, the pendulum saw of the present application may further comprise a handle to facilitate grasping by a physician. In addition, the pendulum saw may also include a power cord or a battery, such as a rechargeable battery.
The specific structure of the pendulum saw according to the embodiment of the present application is described above with reference to fig. 1-2, and the operation of performing osteotomies using the pendulum saw of the present application is illustrated below.
After inserting the first blade 10 and the second blade 20 into the guide slots of the osteotomy guide tool, the physician may turn on a power source, such as a motor. At the moment when the first blade 10 and the second blade 20 contact the bone to be cut, the blade portions of the two blades are reciprocated in opposite directions at the same sawing speed due to the double blade structure, for example, with the same parameters of movement except for the directions, so that the moment force generated by the blade portion of the single blade is equal and opposite to the moment force generated by the blade portion of the other blade, and thus can cancel each other. In addition, the stability of the pendulum saw can be further enhanced without the stroke of the saw blade portions of the double saw blade overlapping and separating.
The pendulum saw adopts a structure of crossing double saw blades, and the motion parameters of a single saw blade can be completely the same as those of another saw blade except the direction. Therefore, when osteotomy is carried out, the acting forces generated by the saw blade parts of the two saw blades on bones are offset, so that the handheld position of a doctor is very stable, the position of the swing saw is not deviated due to the influence of impact force, the situation that the saw blades are stuck in the guide groove is avoided, meanwhile, the flatness of the osteotomy surface is ensured, the osteotomy efficiency is improved, the possibility of delaying the operation time is reduced, the requirements of rapid, accurate and stable osteotomy are met, and the requirement of an osteotomy tool on the use capability of the doctor is also reduced. In addition, the swing saw can adopt the same double saw blades, and has simple structure and convenient operation.
The application has been described in detail with reference to specific embodiments thereof. It will be apparent that the embodiments described above and shown in the drawings are to be understood as illustrative and not limiting of the application. It will be apparent to those skilled in the art that various modifications or variations can be made in the present application without departing from the spirit thereof, and that such modifications or variations do not depart from the scope of the application.
Claims (9)
1. A pendulum saw for osteotomy, comprising:
a first saw blade (10) comprising a first saw blade portion (11) and a first body portion (12), and being pivotally mounted about a first pivot axis;
a second saw blade (20) comprising a second saw blade portion (21) and a second body portion (22), and being pivotally mounted about a second pivot axis;
-a transmission mechanism (40) configured to oscillate reciprocally the first blade (10) and the second blade (20); and
the power source provides power for the transmission mechanism;
wherein the first saw blade (10) and the second saw blade (20) are configured to oscillate reciprocally in opposite directions at the same sawing speed when cutting is performed;
wherein the hinge positions of the first pivot and the second pivot on the first saw blade (10) and the second saw blade (20) respectively are adjustable, a plurality of holes for the hinge of the first pivot and the second pivot are respectively arranged on the first saw blade (10) and the second saw blade (20), and the first pivot and the second pivot are fixed on a shell of the swing saw.
2. Pendulum saw according to claim 1, characterized in that the first blade part (11) and the second blade part (21) are reciprocated with the same movement parameters except for the direction when cutting.
3. Pendulum saw according to claim 1 or 2, characterized in that the strokes of the first (11) and second (21) blade portions overlap and do not separate when cutting.
4. Pendulum saw according to claim 1, characterized in that the first pivot and the second pivot are the same fixed pivot (30).
5. Pendulum saw according to claim 1, wherein the transmission mechanism (40) comprises a first link (41), a second link (42) and a drive member, one end of the first link being pivotally hinged to the first body part (12) of the first saw blade (10) by a third pivot (13), the other end of the first link being pivotally hinged to the drive member by a fourth pivot (51), and one end of the second link being pivotally hinged to the second body part (22) of the second saw blade (20) by a fifth pivot (23), the other end of the second link being pivotally hinged to the drive member by a sixth pivot (52).
6. Pendulum saw according to claim 5, wherein the drive member (50) is reciprocally rotatable about its centre of rotation.
7. Pendulum saw according to claim 5, wherein the drive member (60) is reciprocally movable in a straight line.
8. Pendulum saw according to claim 5, wherein the fourth pivot (51) and the sixth pivot (52) are one and the same pivot (61).
9. The pendulum saw of claim 1 further comprising a handle, a power cord, or a battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082982.3A CN107693087B (en) | 2017-11-07 | 2017-11-07 | Pendulum saw for osteotomy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711082982.3A CN107693087B (en) | 2017-11-07 | 2017-11-07 | Pendulum saw for osteotomy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107693087A CN107693087A (en) | 2018-02-16 |
| CN107693087B true CN107693087B (en) | 2023-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711082982.3A Active CN107693087B (en) | 2017-11-07 | 2017-11-07 | Pendulum saw for osteotomy |
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| Country | Link |
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| CN (1) | CN107693087B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111345216B (en) * | 2018-12-21 | 2021-12-03 | 傲浒建设集团有限公司 | Municipal administration trees transplanting device |
| CN110801261B (en) * | 2019-11-22 | 2021-06-18 | 上海龙慧医疗科技有限公司 | Double-moving-piece fine cutting swing saw blade for orthopedic surgery |
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| CN209332178U (en) * | 2017-11-07 | 2019-09-03 | 北京蒙太因医疗器械有限公司 | Goose saw for osteotomy |
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| GB1170845A (en) * | 1967-08-11 | 1969-11-19 | Derouter Brothers Ltd | Improved Portable Power Operated Saw |
| US4625405A (en) * | 1984-07-02 | 1986-12-02 | Deeco, Inc. | Cast cutter |
| US5016356A (en) * | 1989-09-28 | 1991-05-21 | Trench Anthony B | Saw and saw blade for use therein |
| US5092869A (en) * | 1991-03-01 | 1992-03-03 | Biomet, Inc. | Oscillating surgical saw guide pins and instrumentation system |
| US5846244A (en) * | 1995-09-18 | 1998-12-08 | Exactech, Inc. | Counter-balanced oscillating surgical saw |
| DE10061435C1 (en) * | 2000-12-09 | 2002-01-17 | Aesculap Ag & Co Kg | Surgical oscillating saw has sawblade clamped between carrier surface of oscillating hollow shaft and clamp surface of axially displaced armature |
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| Publication number | Publication date |
|---|---|
| CN107693087A (en) | 2018-02-16 |
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