An osteotome

Abstract

The present invention discloses an osteotome, which includes a handheld part and a saw blade. The saw blade is fixedly connected to the front end of the top of the handheld part. The osteotome further includes a surrounding device connected to the handheld part. The surrounding device is provided with a surrounding part that circumferentially surrounds the periphery of the bone to be transected. A channel communicating the bone to be transected and the saw blade is provided in the surrounding part, and the channel is arranged radially along the bone to be transected. The osteotome of the present invention has the advantages of simple structure, stable operation, good osteotomy effect, and no incomplete osteotomy.

Description

Technical Field

[0001] The present invention relates to the field of medical instruments, and particularly to an osteotome. Background Art

[0002] There are two common existing osteotomy devices and methods: the first is drilling with an electric drill combined with osteotomy using an osteotome, and the second is osteotomy with a reciprocating saw. The first method has the following drawbacks: ① The force during osteotomy drilling cannot be well controlled; ② The osteotomy plane by the osteotome is uneven; ③ The osteotomy segment is split during the operation; ④ There is a possibility of damaging nerves and blood vessels during the operation, resulting in limb necrosis, lower limb sensory or functional disorders after the operation. Although the second method avoids the shortcoming of uneven osteotomy planes, when performing osteotomy, the operator needs to tightly hold the handheld part with both hands to keep the saw blade in the osteotomy position. There are two types of displacements during the osteotomy process: the first is longitudinal displacement, where the saw blade slides up and down when contacting the outer wall of the bone, resulting in the movement of the osteotomy plane; the second is lateral displacement: although the lateral swing of the saw blade is the power source for osteotomy, the swing amplitude cannot be controlled, easily damaging the soft tissues around the bone, and even damaging important blood vessels and nerves, causing lower limb kinetic disorders or even necrosis. And it is very easy to cause injury to the operator himself and the assistant when the operator's grip strength is insufficient.

[0003] In addition, this osteotomy device also has problems in terms of osteotomy depth. Because during the osteotomy process, only the limited front part of the bone to be transected is exposed in the operator's field of vision, and the rear side cannot be exposed. This situation is likely to cause the problem of incomplete osteotomy of the bone. During the operation, other tools such as osteotomes need to be used for further osteotomy, resulting in incomplete osteotomy of the rear side and splitting. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an osteotome with a simple structure, stable operation, good osteotomy effect and no incomplete osteotomy.

[0005] To solve the above technical problems, the technical solution proposed by the present invention is:

[0006] An osteotome, comprising a handheld part and a saw blade. The saw blade is fixedly connected to the front end of the top of the handheld part, and further comprises a surrounding device connected to the handheld part. The surrounding device is provided with a surrounding part that circumferentially surrounds the periphery of the bone to be transected. A channel communicating the bone to be transected and the saw blade is provided inside the surrounding part, and the channel is arranged radially along the bone to be transected.

[0007] As a further improvement of the above technical solution:

[0008] A limiting plate perpendicular to the channel is provided in the channel of the surrounding part. A through hole allowing the saw blade to pass through is provided on the limiting plate, and the height of the through hole is 1.2 - 2 times the thickness of the saw blade.

[0009] The embracing portion includes two embracing pieces, which are hingedly connected in the middle and have concave arc-shaped snap-fitting ends at the ends. The snap-fitting ends can snap onto the periphery of the bone to be cut by rotating around the hinge point, and the channel is between the snap-fitting ends and the hinge point.

[0010] The inner sides of the two embracing parts are each provided with a limiting piece, and the two embracing parts are buckled together so that the limiting pieces are butted together to form the limiting plate.

[0011] The embracing portion is provided with an elastic member supporting between the two embracing members at the other end of the buckling end relative to the hinge point / an elastic member tied between the two embracing members is provided at the same side of the buckling end relative to the hinge point.

[0012] The embracing device also includes a connecting portion, through which the embracing device is slidably connected with the hand-held portion along the channel direction.

[0013] The connecting part is a sliding block arranged on the embracing device, and the hand-held part is provided with a slideway arranged along the channel direction and matched with the connecting part.

[0014] The saw blade is provided with limit blocks on both sides of the connection end with the hand-held part, and the distance between the outer sides of the two limit blocks is greater than the width of the through hole of the limit plate; when the end of the saw blade slides along the channel to reach the inner side of the embracing part, the limit block abuts against the plate surface of the limit plate.

[0015] The contour of the end of the saw blade is the same as the shape of the inner side surface of the embracing portion.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The present invention provides an osteotome, which, in addition to the hand-held part and saw blade that all existing osteotomy devices have, also includes an embracing device connected to the hand-held part, the embracing device is provided with an embracing portion circumferentially arranged around the periphery of the bone to be cut, and a channel connecting the bone to be cut and the saw blade is provided in the embracing portion, the channel is radially arranged along the bone to be cut, that is, the bone to be cut and the saw blade are surrounded in the same internal area. When osteotomy is performed, since the embracing portion is arranged around the periphery of the bone to be cut, the saw blade can only cut the bone inside the embracing portion, and the movable area is limited, so the operation process is more stable, and the osteotomy effect is optimized; and the longitudinal displacement and lateral displacement of the saw blade are both limited, which greatly reduces the probability of damage to the soft tissue, blood vessels and nerves around the bone, and avoids injuries to the operator himself and the assistant when the operator lacks grip strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the osteotome of the present invention;

[0019] Figure 2Schematic diagram of the connection structure between the handheld part and the saw blade in the osteotome of the present invention;

[0020] Figure 3 Front view structure schematic diagram of the surrounding device in the osteotome of the present invention;

[0021] Figure 4 Top view structure schematic diagram of the surrounding device in the osteotome of the present invention;

[0022] Figure 5 Three-dimensional structure schematic diagram of the surrounding device in the osteotome of the present invention;

[0023] Figure 6 Schematic diagram of the connection structure between the surrounding device and the handheld part in the osteotome of the present invention.

[0024] Legend: 1. Handheld part; 11. Slideway; 2. Saw blade; 21. Limit block; 3. Surrounding device; 31. Surrounding part; 311. Channel; 312. Limit plate; 313. Surrounding member; 32. Connecting part. Detailed implementation manners

[0025] To facilitate the understanding of the present invention, the present invention will be described more comprehensively and meticulously below in conjunction with the accompanying drawings of the specification and preferred embodiments, but the protection scope of the present invention is not limited to the following specific embodiments.

[0026] Embodiment:

[0027] As Figures 1 to 6 shown, the osteotome of this embodiment includes a handheld part 1 and a saw blade 2. The saw blade 2 is fixedly connected to the front end of the top of the handheld part 1, and further includes a surrounding device 3 connected to the handheld part 1. The surrounding device 3 is provided with a surrounding part 31 that circumferentially surrounds the periphery of the bone to be transected, and a channel 311 communicating the bone to be transected and the saw blade 2 is provided inside the surrounding part 31. The channel 311 is arranged radially along the bone to be transected, that is, the bone to be transected and the saw blade 2 are surrounded in the same internal area. When osteotomy is performed, since the surrounding part 31 surrounds the periphery of the bone to be transected, the saw blade 2 can only transect the bone inside the surrounding part 31, and the activity area is limited. Therefore, the operation process is more stable, optimizing the osteotomy effect; and both the longitudinal displacement and the lateral displacement of the saw blade 2 are restricted, greatly reducing the probability of damage to the soft tissues, blood vessels and nerves around the bone, and avoiding damage to the operator himself and the assistant in case of insufficient grip strength of the operator; in addition, the surrounding device 3 does not restrict the circumferential rotation of the saw blade 2 around the bone to be transected, ensuring the power source.

[0028] In this embodiment, a limiting plate 312 is provided in the channel 311 of the embracing portion 31 and is arranged perpendicular to the channel 311. The limiting plate 312 is provided with a through hole allowing the saw blade 2 to pass through. The height of the through hole is 1.2 to 2 times the thickness of the saw blade 2, further limiting the longitudinal displacement of the saw blade 2 and preventing the saw blade 2 from sliding up and down when contacting the outer wall of the bone, so that the osteotomy plane always remains in the set position, thereby ensuring the osteotomy effect.

[0029] In this embodiment, Figures 3 to 5 As shown, the embracing portion 31 includes two embracing pieces 313, the two embracing pieces 313 are hingedly connected in the middle, and the ends are provided with inwardly concave arc-shaped snapping ends, which can be snapped to the periphery of the bone to be cut by rotating around the hinge point, and the operation is simple and convenient, and it is applicable to various intraoperative situations; between the snapping end and the hinge point is a channel 311. The two embracing pieces 313 in this embodiment are symmetrical relative to the hinge point, and in other embodiments, they can also be changed to asymmetrical embracing pieces 313 according to the situation, which will not be described in detail here.

[0030] In this embodiment, the inner side surfaces of the two embracing members 313 are both provided with limiting plates, and the two embracing members 313 are buckled to make the limiting plates butt joint to form the limiting plates 312. The limiting plates in this embodiment are symmetrical relative to the hinge point, and in other embodiments, they can also be changed to asymmetrical limiting plates according to the situation, which will not be described in detail here.

[0031] In this embodiment, the embracing portion 31 is provided with an elastic member supported between the two embracing members 313 at the other end of the buckling end relative to the hinge point, so as to ensure that the buckling end is always kept in a buckled state during the osteotomy process, thereby ensuring the osteotomy effect. In other embodiments, an elastic member pulled between the two embracing members 313 or other connection methods that can ensure the buckling effect may also be provided on the same side of the buckling end relative to the hinge point, which will not be described in detail here.

[0032] In this embodiment, Figure 3 and Figure 6 As shown, the embracing device 3 also includes a connecting portion 32, and the embracing device 3 is connected to the hand-held portion 1 in a sliding manner along the channel 311 through the connecting portion 32. When the embracing portion 31 is buckled around the periphery of the bone to be cut, the osteotomy operation can be started. At this time, the outer side surface of the embracing portion 31 is supported on the tissue around the bone to be cut, so that the saw blade 2 can move along the channel 311 to the bone to be cut and perform the osteotomy operation.

[0033] In this embodiment, the connection part 32 is a slider disposed on the embracing device 3, and the hand-held part 1 is provided with a slideway 11 arranged along the channel 311 and matched with the connection part 32. The slider in this embodiment is disposed on the hinge axis at the hinge point of the embracing part 31, and in other embodiments, it can also be disposed at other positions as long as the embracing device 3 and the hand-held part 1 can slide relative to each other.

[0034] In this embodiment, as Figure 2 shown, on both sides of the connection end of the saw blade 2 with the handheld part 1, there are provided limiting blocks 21, and the distance between the outer sides of the two limiting blocks 21 is greater than the width of the through hole of the limiting plate 312; when the end of the saw blade 2 slides along the channel 311 to reach the inner side surface of the surrounding part 31, the limiting block 21 abuts against the plate surface of the limiting plate 312, preventing the saw blade 2 from further advancing to damage the surrounding part 31 or even the tissue outside the surrounding part 31, further improving the safety of osteotomy; and it can also play a role in prompting the position of the saw blade 2, ensuring that the saw blade 2 reaches the set osteotomy depth, preventing incomplete osteotomy at the rear side and causing splitting.

[0035] In this embodiment, as Figure 1 and Figure 2 shown, the contour of the end of the saw blade 2 is the same arc contour as the inner side surface of the surrounding part 31. This setting method can make the saw blade 2 fit more closely with the inner side surface of the surrounding part 31 when it reaches the set osteotomy depth, further improving the osteotomy effect. In other embodiments, saw blades with straight ends or other shaped ends can also be used according to the situation, which will not be elaborated here.

[0036] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. For those skilled in the art, the improvements and transformations obtained without departing from the technical concept of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An osteotome, comprising a handheld part (1) and a saw blade (2), wherein the saw blade (2) is fixedly connected to the front end of the top of the handheld part (1), and is characterized in that: The invention also comprises an embracing device (3) connected to the handheld portion (1), the embracing device (3) being provided with an embracing portion (31) circumferentially arranged around the periphery of the bone to be cut, the embracing portion (31) being provided with a channel (311) connecting the bone to be cut and the saw blade (2), the channel (311) being arranged radially along the bone to be cut, a limiting plate (312) being arranged perpendicular to the channel (311) being provided in the channel (311) of the embracing portion (31), a through hole being provided on the limiting plate (312) for allowing the saw blade (2) to pass through, the through hole having a height of 1.2 to 2 times the thickness of the saw blade (2), the embracing portion (31) comprising two embracing members ( 313), the two embracing members (313) are hingedly connected in the middle, and the end is provided with a concave arc-shaped snap-fitting end, and the snap-fitting end can be snapped on the periphery of the bone to be cut by rotating around the hinge point, and the channel (311) is between the snap-fitting end and the hinge point. The inner side surfaces of the two embracing members (313) are provided with limiting plates, and the two embracing members (313) are snapped together to make the limiting plates butt joint to form the limiting plate (312), and the embracing part (31) is provided with an elastic member that supports between the two embracing members (313) at the other end of the snap-fitting end relative to the hinge point / an elastic member that is pulled between the two embracing members (313) is provided at the same side of the snap-fitting end relative to the hinge point.

2. The osteotome according to claim 1, characterized in that: The embracing device (3) further comprises a connecting portion (32), and the embracing device (3) is connected to the handheld portion (1) in a sliding manner along the direction of the channel (311) via the connecting portion (32).

3. The osteotome according to claim 2, characterized in that: The connecting portion (32) is a sliding block provided on the embracing device (3), and the hand-held portion (1) is provided with a slideway (11) arranged along the direction of the channel (311) and matching with the connecting portion (32).

4. The osteotome according to claim 2, characterized in that: The saw blade (2) is provided with limit blocks (21) on both sides of the end connected to the hand-held portion (1), and the distance between the outer side surfaces of the two limit blocks (21) is greater than the width of the through hole of the limit plate (312); when the end of the saw blade (2) slides along the channel (311) and reaches the inner side surface of the embracing portion (31), the limit blocks (21) abut against the plate surface of the limit plate (312).

5. The osteotome according to claim 1, characterized in that: The profile of the end of the saw blade (2) is the same as the shape of the inner side surface of the embracing portion (31).

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