CN216535420U - Medical instrument and drilling guide and nail placing device thereof - Google Patents

Abstract

The utility model relates to a medical instrument, a drilling guide device and a nail placing device thereof. According to the medical instrument, the drilling guide device and the nail placing device, the position of the main rod relative to the plane where the cup edge of the acetabular cup is located serves as reference to improve the alignment coaxiality of the through hole of the guide head and the fixing hole of the acetabular cup so as to reduce the difficulty in forming the nail hole, and the nail hole and the fixing hole formed under the guide of the guide head have good coaxiality so as to facilitate the implantation of a screw, reduce the implantation difficulty of the acetabular cup and reduce the possibility of damaging soft tissues.

Description

Medical instrument and drilling guide and nail placing device thereof

Technical Field

The utility model relates to the technical field of auxiliary instruments for orthopedic surgery, in particular to a medical instrument, a drilling guide device and a nail placing device thereof.

Background

The traditional total hip joint replacement operation needs to cut off external circumflex muscles and destroy the integrity of a joint capsule, so that the functions of muscles around the hip joint are affected, surgical dislocation is needed in the operation process, and multiple persons are needed to cooperate and complete the operation. Therefore, more and more joint surgeons try a suppernatus percutaneous Assisted Total Hip surgery (supper capsule percutaneous Assisted Total Hip arthroplasty) to perform minimally invasive surgery, enter from the back side through the gap between the piriformis and the gluteus minimus, and keep the muscle function and the complete joint capsule around the Hip joint, thereby obviously reducing the bleeding and the tissue damage during the surgery.

However, the suppath minimally invasive surgery approach is entered from the rear side, the surgical incision is small and deep, and the suppath minimally invasive surgery approach has a certain inclination angle, so that the doctor is limited in visual field during screw implantation and other processes in the surgery and cannot easily judge the opening position of the screw hole, the screw is easily broken by a drill bit during hole rotating, or the drilling position is deviated, so that the screw cannot be completely screwed in the screw implantation process, and the implantation of the acetabular cup is difficult. The operation of re-implantation is easy to contuse soft tissues and aggravate the operation risk.

SUMMERY OF THE UTILITY MODEL

Based on the technical scheme, the medical instrument, the drilling guide and the nail placing device are provided to solve the problems that the screw acetabular cup is difficult to implant and soft tissues are easy to damage.

In one aspect, the utility model provides a drill guide, which comprises a main rod and a guide head arranged at the end part of the main rod, wherein the guide head is provided with a through hole for guiding a drilling tool to open a hole in an acetabulum socket, and the axis of the through hole and the axis of the main rod form an acute angle.

When the drilling guide device guides the drilling tool to drill holes on the acetabular fossa, the axis of the through hole and the axis of the main rod form an acute angle, so that the position of the guide head relative to the acetabular cup can be adjusted by enabling the main rod to be close to an angle parallel to the plane where the acetabular cup is located, the main rod is used as a reference to improve the alignment coaxiality of the through hole of the guide head and the fixing hole of the acetabular cup so as to reduce the difficulty of drilling the screw hole, and the screw hole and the fixing hole which are drilled under the guide of the guide head have good coaxiality so as to facilitate the implantation of a screw, reduce the implantation difficulty of the acetabular cup and reduce the possibility of damaging soft tissues.

In another aspect, the present invention provides a nail placing device, including a pincer body and a pincer head connected to an end of the pincer body, wherein the pincer body and the pincer head have an open state and a closed state, the pincer head forms a clamping opening for clamping a screw in the closed state, and an axis of the clamping opening forms an acute angle with an axis of the pincer body.

The screw placing device can stably clamp the screw to stabilize the screw implanting direction, and in the screw implanting process, the axis of the clamping port for clamping the screw and the axis of the forceps body form an acute angle, so that the forceps body can be adjusted to the position of the forceps head relative to the acetabular cup at an angle close to the angle parallel to the plane where the cup edge of the acetabular cup is located, the clamping port of the forceps head and the alignment coaxiality of the fixing hole of the acetabular cup are improved by using the forceps body as a reference, the screw implanting difficulty is reduced, and the soft tissue damage is reduced.

In a further aspect, the present invention provides a medical device for assisting implantation of an acetabular cup into an acetabular socket, a wall of the acetabular cup being provided with fixation holes, the medical device comprising:

in the drilling guide, an included angle between the axis of the through hole and the axis of the main rod is equal to an included angle between the axis of the fixing hole of the acetabular cup and the plane where the cup edge of the acetabular cup is located;

and/or in the nail placing device, the included angle between the axis of the clamping opening and the axis of the forceps body is equal to the included angle between the axis of the fixing hole of the acetabular cup and the plane where the acetabular cup is located.

During operation, the position of a related structural part (such as a guide head of a drilling guide or a binding clip of a nail placing device) relative to the acetabular cup can be adjusted by taking the position of the acetabular cup along the plane as a reference so as to reduce the implantation difficulty of the acetabular cup and reduce the possibility of soft tissue damage.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings of the embodiments can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of one embodiment of a medical instrument for assisting in implanting an acetabular cup into an acetabular socket for adjusting the position of the acetabular cup;

FIG. 2 is a schematic view of one embodiment of a medical instrument for assisting an acetabular cup in implantation into an acetabular socket, shown drilled therein;

FIG. 3 is a schematic view of one embodiment of a medical device for assisting an acetabular cup in implantation of an acetabular socket shown with a screw implanted therein;

FIG. 4 is a schematic view of an acetabular cup of an embodiment of the medical device;

FIG. 5 is a schematic view of an embodiment of a medical instrument with a first guide head positioned in a fixation hole of an acetabular cup;

FIG. 6 is a schematic view of an embodiment of a medical instrument with a second guide head positioned in a fixation hole of an acetabular cup;

FIG. 7 is a view illustrating a case where the lower surface of the main shaft of the drill guide is used to mirror the fixing hole in the medical instrument according to the embodiment;

FIG. 8 is a diagrammatic illustration of an embodiment of a medical device with the clamp body aligning the screw with the fixation hole;

fig. 9 is a schematic view of the medical device according to the embodiment when the lower surface of the forceps body is used to perform specular reflection on the fixing hole.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1-3, one embodiment of the present invention provides a drill guide 20 for use as a medical instrument for assisting in the implantation of an acetabular cup into an acetabular socket, the drill guide 20 providing a guide for the drilling of a nail hole into the acetabular socket. Specifically, as the drilling tool 50 drills the acetabular socket, the drilling tool 50 is guided by the drill guide to drill in the correct location.

For ease of understanding, the drill guide 20 will be further described below in connection with an acetabular cup implantation procedure.

As shown in connection with FIG. 1, prior to drilling the acetabular socket, an acetabular cup 100 may be driven into the acetabular socket using an acetabular cup driver 40. Referring to FIG. 2, after the acetabular cup 100 has been driven into the acetabular socket, the acetabular socket may be drilled using a drilling tool 50 to provide nail holes for implanting screws in the acetabular socket for securing the acetabular cup to the acetabular socket using the screws. Specifically, the cup wall 101 of the acetabular cup 100 is provided with fixation holes 100b, and the fixation holes 100b are used for implanting screws 200 (shown in fig. 3) to achieve fixation of the acetabular cup 100. Thus, the more accurate the alignment of the nail hole in the acetabular socket with the fixation hole 100b, the easier and more reliable the subsequent operation of threading the screw 200 through the fixation hole 100b and into the nail hole.

In the present application, the drill guide 20 is used to guide the drilling tool 50 in drilling the acetabular socket in a location corresponding to the fixation hole 100b of the acetabular cup 100 to improve the accuracy of the drilling location. Specifically, the drill guide 20 includes a primary post 21 and a guide head attached to the end of the primary post 21 and having a through bore for guiding the drilling tool 50 to open a hole in the acetabular socket, the axis of the through bore being at an acute angle to the axis of the primary post 21.

It should be noted that, with reference to fig. 2, 5 and 6, the drill guide 20 can guide the drill bit 53 of the drilling tool 50 to align with the fixation hole 100b of the acetabular cup 100, i.e., the drill bit 53 and the fixation hole 100b have good concentricity along the hole axis w, so that the hole formed in the acetabular socket by the drill bit 53 through the fixation hole 100b has good concentricity with the fixation hole 100b, thereby conveniently matching with the hole in the acetabular socket after the screw 200 is inserted through the fixation hole 100b, reducing the difficulty of implanting the screw 200 and improving the accuracy of implanting the screw 200.

In some embodiments, the primary stem 21 of the drill guide 20 is provided with first and second guide tabs 22 and 23 at opposite ends thereof, respectively, and it will be appreciated that the first and second guide tabs 22 and 23 are adapted to be positioned in the fixation hole 100b to guide the drill 53 through the hole in the acetabular socket at a location corresponding to the fixation hole 100 b. The first guide head 22 and the second guide head 23 are used for positioning and guiding the large-size fixing hole 100b and the small-size fixing hole 100b of the acetabular cup 100 respectively, and are suitable for the requirement of the pilot drill 53 for drilling the acetabular fossa. It will be readily appreciated that the drill guide 20 may also have only one guide head.

Taking the first guiding head 22 as an example, when the first guiding head 22 is used for punching an acetabulum socket, the first guiding head 22 with the shape matched with the fixing hole 100b of the acetabulum cup 100 is selected, and the first guiding head 22 is embedded into the fixing hole 100b to guide the drill bit 53 of the drilling tool 50.

It should be noted that, after the first guiding head 22 is placed in the fixing hole 100b, the first guiding head 22 may also slightly shake in the fixing hole 100b, and the extending direction of the fixing hole 100b needs to be manually aligned with the extending direction of the fixing hole 100b, that is, the first guiding head 22 is positioned in the fixing hole 100b, so that the first guiding head 22 is not easily shaken relative to the acetabular cup 100, so as to provide a stable guiding effect for the drilling tool 50.

In some embodiments, the first guide head 22 and the second guide head 23 are provided with through holes for guiding the drilling tool 50, the shape of the through holes being adapted to the outer shape of the drill 53 of the drilling tool 50, e.g. being cylindrical.

It should be noted that the first guide head 22 and the second guide head 23 are eccentrically disposed with respect to the main rod 21, specifically, an axis of a through hole formed in the guide head of the drill guide 20 forms an acute angle with an axis of the main rod 21, for example, as shown in fig. 5, an angle formed by an axis 22a of the through hole 221 of the first guide head 22 and a longitudinal axis 21a of the main rod 21 (i.e., an extending direction of the main rod 21) is an acute angle; as shown in fig. 6, the axis 23a of the through hole 231 of the second guiding head 23 forms an acute angle with the longitudinal axis 21a of the primary lever 21.

In summary, since the axis of the through hole formed in the guide head of the drill guide 20 forms an acute angle with the axis of the main rod 21, when the drilling tool 50 is guided by the through hole to drill the acetabular socket, the main rod 21 can be parallel to the plane S of the rim of the acetabular cup 100, so that the orientation of the guide head can be conveniently adjusted by using the main rod 21 as a reference, and the drilling tool 50 can drill at a correct position under the guidance of the through hole.

Further, as shown in fig. 5, the axis 22a of the through hole 221 of the first guide head 22 and the longitudinal axis 21a of the primary lever 21 form an angle ^ (acute angle) equal to the angle between the hole axis w of the fixing hole 100b of the acetabular cup 100 and the plane S on which the cup rim of the acetabular cup 100 lies, and therefore, as long as the primary lever 21 and the acetabular cup 100 lie in the plane S during surgery are ensured to be parallel, the hole axis 22a of the first guide head 22 and the hole axis w of the fixing hole 100b are parallel, that is, the direction of the first guide head 22 is correct. Therefore, a doctor can judge whether the drilling direction is accurate or not through the relative position relationship between the main rod 21 and the cup edge of the acetabular cup 100, and the problem of difficult positioning is avoided.

The angle a formed by the axis 22a of the through hole 221 of the first guide head 22 and the longitudinal axis 21a of the primary lever 21 ranges from 30 ° to 60 °, for example, from 30 °, 35 °, 40 °, 45 °, 50 °, 55 ° or 60 °. The angle a is consistent with the numerical value of the included angle between the hole axis w of the fixing hole 100b and the plane S where the cup edge of the acetabular cup 100 is located in the value range, so that reference can be provided for positioning the first guide head 22 and the fixing hole 100b by using the position of the main rod 21 relative to the plane S where the cup edge of the acetabular cup 100 is located, and the positioning difficulty of the first guide head 22 and the fixing hole 100b is reduced.

In some embodiments, as shown in fig. 6, the angle ×. B between the axis 23a of the through hole 221 of the second guide head 23 and the longitudinal axis 21a of the primary lever 21 has a value in the range of 30 ° to 60 °, such as 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, or 60 °. Therefore, the position of the main rod 21 relative to the plane S along which the acetabular cup 100 is located can be used for providing reference for positioning the second guide head 23 and the fixing hole 100b, and the positioning difficulty of the second guide head 23 and the fixing hole 100b is reduced.

During a Superpath surgical approach, the surgeon's line of sight is substantially perpendicular to the axis of acetabular cup 100. As shown in figures 5 and 6, only the side of acetabular cup 100 is visible and the circular opening of acetabular cup 100 is not visible. In such a view, the surgeon cannot view the screw holes in the acetabular cup 100.

In some embodiments, as shown in connection with fig. 7, the lower surface of the primary lever 21 is a mirror surface, the lower surface of the primary lever 21 being the surface facing the guide head and the upper surface being the surface facing away from the guide head. When the drilling guide 20 is placed, a doctor can observe the position of the fixing hole 100b of the acetabular cup 100 through the specular reflection of the lower surface of the main rod 21, namely, the fixing hole 100b forms a mirror image hole 100j on the lower surface of the main rod 21 through the specular reflection, so that the position of the fixing hole 100b can be judged according to the mirror image hole 100j, whether the first guide head 22 or the second guide head 23 of the drilling guide 20 is aligned with the fixing hole 100b or not is determined, and the problem that the position of the nail hole is difficult to judge due to limited visual field of a doctor in an operation is solved.

It should be noted that the lower surface of the master rod 21 may be mirror-finished by polishing the master rod 21. In other embodiments, the lower surface of the main rod 21 may be formed with a mirror surface by coating or attaching a reflective film, so as to facilitate the doctor to observe the position of the fixing hole 100b during the operation.

As shown in connection with FIG. 3, after the tapping operation is completed, the screw 200 is simply passed through the tapped nail hole from the fixation hole 100b of the acetabular cup 100, and the acetabular cup 100 may be secured to the acetabular socket by screwing the screw 200. Based on this, the utility model also provides a nail placing device 30, the nail placing device 30 is used as a medical instrument for assisting the acetabular cup to be implanted into the acetabular socket, the nail placing device 30 can clamp the screw 200 to be aligned with the fixing hole 100b of the acetabular cup 100, so that when the screwdriver 60 is connected with the tail part of the screw 200, a doctor can implant the screw 200 by rotating the screwdriver 60 to stably fix the acetabular cup 100 by the screw 200.

The nail placing device 30 includes a clamp body 31 and a clamp head 32 connected to the clamp body 31. Wherein the body 31 includes two walls 31a hinged to each other, and the relative rotation between the two walls 31a enables the body 31 and the head 32 to have an open state and a closed state, and in the closed state, the head 32 is closed to form a clamping opening for clamping the screw 200. The shape of the clamping opening is adapted to the outer shape of the screw 200, and is, for example, a cylindrical through hole. In this embodiment, the opening and closing of the clamp head 32 are controlled by operating the clamp body 31, so that the clamp head 32 can clamp the positioning screw 200 in the closed state, so as to align the screw 200 with the fixing hole 100b of the acetabular cup 100, and therefore when the screwdriver 60 screws the screw 200, the screw 200 is not easy to shake under the clamping positioning of the clamp head 32, so as to ensure that the screw 200 is stably implanted into the acetabular socket, and the fixing stability of the acetabular cup 100 is enhanced.

In some embodiments, when the two clamp walls 31a of the clamp body 31 operate the clamp head 32 to close, i.e. the clamp head 32 is in a state of clamping the screw 200, the concave curved surfaces of the clamp head 32 at the ends of the two clamp walls 31a form a cylindrical hole (in this case, the clamping opening is a cylindrical hole) matching with the shape of the tail of the screw 200, so that the clamp head 32 can hold and position the screw 200, and the stability of the screw 200 implantation process can be improved.

As shown in fig. 8, similar to the design of the drill guide 20, the axis 32a of the clamping opening of the forceps head 32 and the axis of the forceps body 31 form an acute angle C, which is equal to the included angle between the hole axis w of the fixing hole 100b of the acetabular cup 100 and the plane S where the cup rim of the acetabular cup 100 is located, for example, the value of the angle C ranges from 30 ° to 60 °, and the doctor judges whether the implantation direction of the screw 200 is accurate or not according to the relative position relationship between the forceps body 31 and the cup rim of the acetabular cup 100, thereby avoiding the problem that the screw 200 is deviated and cannot be completely screwed in.

In some embodiments, as shown in fig. 9, the lower surface of the pincer body 31 is a mirror surface, the lower surface of the pincer body 31 is a surface facing the pincer head 32, and the upper surface is a surface facing away from the pincer head 32. The fixing hole 100b is mirror-reflected on the lower surface of the forceps wall 31a of the forceps body 31 to form a mirror image hole 100j, so that a doctor can judge the position of the fixing hole 100b according to the mirror image hole 100j, and then can observe the position of the fixing hole 100b of the acetabular cup 100 through mirror reflection on the lower surface of the forceps body 31, so that the doctor can accurately align the screw 200 with the fixing hole 100b in the operation, the implantation difficulty of the screw 200 is reduced, the implantation direction accuracy is improved, and the operation risk is reduced.

In some embodiments, referring again to fig. 1-3, the medical device for assisting in implanting an acetabular cup into an acetabular socket further comprises a sleeve 10, the sleeve 10 being configured to establish a working channel for communication to the acetabular cup 100. The working channel established by the sleeve 10 can guide operation tools such as the acetabular cup impactor 40, the drilling tool 50 and the screwdriver 60 into the acetabular cup 100 for related operations, and can prevent soft tissue contusion when the operation tools are moved into and out of the operation position.

Before implanting the acetabular cup 100 and the screw 200, the percutaneous penetration site may be identified and completed by a guiding tool or by a physician based on clinical and anatomical experience. The working channel is set up after the puncture by a tool or by the physician manually inserting the cannula 10 as described above. Specifically, the cannula 10 can be selected to have an appropriate length and thickness based on the patient's anatomical features to accommodate the needs of the surgical procedure.

After the working channel is established with the cannula 10, the acetabular cup 100 is placed through the main incision of the surgery. As shown in FIG. 1, one end of acetabular cup driver 40 extends through a working channel created by sleeve 10 and is removably attached to acetabular cup 100 such that actuation of acetabular cup driver 40 moves acetabular cup 100 relative to the acetabular socket to adjust the position of acetabular cup 100 for driving into and removing from the acetabular socket. Since the acetabular cup driver 40 is inserted into the working channel formed by the sleeve 10, when the acetabular cup 100 is driven into or removed from the acetabular socket by the acetabular cup driver 40, the probability of soft tissue contusion by the acetabular cup driver 40 is low, and even if the installation position of the acetabular cup 100 is deviated, the acetabular cup 100 can be loosened from the acetabular socket by striking the striking seat 43, so that the acetabular cup 100 can be driven into the acetabular socket by the acetabular cup driver after the position of the acetabular cup 100 is adjusted, and the accuracy of the implantation position is improved.

As shown in FIG. 1, the acetabular cup impactor 40 includes a gripping rod 41, a threaded connection 42, and a striking block 43. The screw-threaded portion 42 and the striking plate 43 are respectively attached to both ends of the grip lever 41.

Wherein, the holding rod 41 is arranged through the sleeve 10, so that the working channel built by the sleeve 10 is utilized to provide good stability for the holding rod 41, and soft tissue contusion caused by the holding rod 41 in the operation process is avoided. The threaded connection 42 is configured to threadably engage the acetabular cup 100 to provide a removable connection between the gripping rod 41 and the acetabular cup 100. The striking plate 43 is used to receive an external force impact, i.e., to provide a point of application. Since the threaded connection portion 42 and the striking base 43 are respectively located at two ends of the holding rod 41, and the holding rod 41 is connected with the acetabular cup 100 through the threaded connection portion 42, when a striking force is applied to the striking base 43, the striking force is transmitted to the acetabular cup 100 connected with the threaded connection portion 42 through the holding rod 41, so that the installation position of the acetabular cup 100 is adjusted.

It should be noted that the threaded connection portion 42 on the holding rod 41 may be a screw rod or a threaded sleeve with a threaded hole, as long as the acetabular cup 100 has a connection structure matching the threaded connection portion 42. For example, in some embodiments, the threaded portion 42 is a threaded rod, i.e., has an external thread, and the bottom of the acetabular cup 100 is provided with a connecting hole 100a (see fig. 4) for mating with the threaded rod, so that the detachable connection of the holding rod 41 to the acetabular cup 100 is achieved by the mating of the threaded rod with the connecting hole 100a of the acetabular cup 100. For another example, the threaded connection portion 42 is a threaded sleeve having a threaded hole, wherein the threaded sleeve and the holding rod 41 may be integrally formed, i.e., the threaded hole is formed in the holding rod 41. The screw sleeve can also be connected with the holding rod 41 by means of threads, clamping or welding and the like. The bottom of the acetabular cup 100 is provided with a stud matched with a threaded hole of the screw sleeve, so that the acetabular cup 100 is in threaded connection with the screw sleeve, the holding rod 41 is in detachable connection with the acetabular cup 100, and when the holding rod 41 is connected with the acetabular cup 100, the striking force of the striking seat 43 can be transmitted to the acetabular cup 100 through the holding rod 41, so that the installation position of the acetabular cup 100 can be adjusted.

The holding rod 41 is provided with anti-slip structures such as knurls, coarse sand blasting and the like so as to be convenient to hold and improve the operation stability.

In some embodiments, as shown in connection with fig. 2, the boring tool 50 includes a tool joint 51 and a drive shaft 52 in addition to a drill bit 53. Wherein, the tool joint 51 and the drill bit 53 are respectively arranged at two ends of the transmission shaft 52, the tool joint 51 is used for connecting with an electric tool, the transmission shaft 52 is driven by the electric tool to rotate in the sleeve 10, and the drill bit 53 is driven by the transmission shaft 52 to rotate so as to meet the requirement of punching in an acetabulum socket.

It should be noted that the hole formed in the acetabular socket by the drill 53 may be a threaded hole or a straight hole (i.e., the hole wall is unthreaded), and is not limited herein.

The drive shaft 52 is a flexible shaft made of a resilient material such as nitinol to accommodate angular bending adjustment while the drive shaft 52 is transmitting the torque of the power tool, thereby facilitating the drilling of the hole in the acetabular socket at the exact location of the drill bit 53 guided by the drill guide 20.

In some embodiments, the drive shaft 52 comprises a flexible tube and rigid sections connected to both ends of the flexible tube. The tool joint 51 and the bit 53 are connected to the rigid segments at both ends of the flexible tube, respectively, so that the connection stability is improved by the rigid segments, and at the same time, since the flexible tube has good flexibility, the flexible tube can be adapted to a certain angle of bending adjustment while the driving shaft 52 transmits the torque of the power tool, so that the bit 53 can open a hole at an accurate position of the acetabular socket under the guidance of the drill guide 20.

In some embodiments, as shown in fig. 3, the screwdriver 60 is disposed through the casing 10, and the tail of the screwdriver 60 is provided with a power connector 61, and the power connector 61 is used for connecting with a power tool. The head of the screwdriver 60 is provided with a screwdriver bit 62 which can rotate in the whole circumferential direction, and the universal structure of the screwdriver bit 62 can be a ball-and-socket universal joint or a non-coplanar double-shaft universal joint, so that the screwdriver bit 62 can adjust the direction to match with the screw 200. In this embodiment, the power tool, when coupled to the power adapter, may rotate the driver 60 such that the driver bit 62 rotates the screw 200 for implantation into the acetabular socket, such that the screw 200 may stably secure the acetabular cup 100 to the acetabular socket.

It should be noted that the screwdriver bits 62 may be a straight screwdriver bit, a cross screwdriver bit, a star screwdriver bit, a square screwdriver bit, a hexagonal screwdriver bit, a Y-shaped screwdriver bit, and the like. The type of the screwdriver bit is not limited thereto, so long as it conforms to the groove type of the screw 200 to screw the screw 200.

In summary, in the embodiment of the present invention in which the sleeve 10 is included, the working channel established by the sleeve 10 is suitable for the operation of the acetabular cup driver 40, the drilling tool 50 and the screwdriver 60, so as to prevent the soft tissue from being injured when the operation tool is moved in and out of the operation position, thereby reducing the injury to the soft tissue and further achieving the micro-trauma effect.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The drilling guide is characterized by comprising a main rod and a guide head arranged at the end part of the main rod, wherein the guide head is provided with a through hole for guiding a drilling tool to open a hole in an acetabulum socket, and the axis of the through hole forms an acute angle with the extending direction of the main rod towards the direction far away from the guide head in the extending direction in which the guide head guides the drilling tool to be inserted.

2. The drill guide according to claim 1, wherein an angle formed by the axis of the through-hole and the axis of the main rod ranges from 30 ° to 60 °.

3. The drill guide of claim 1, wherein the lower surface of the primary rod is a mirror surface.

4. The drill guide according to claim 1, wherein the guide head comprises a first guide head and a second guide head, the first guide head and the second guide head being connected to both ends of the main rod, respectively.

5. The nail placing device is characterized by comprising a clamp body and a clamp head connected to the end part of the clamp body, wherein the clamp body and the clamp head have an open state and a closed state, the clamp head forms a clamping opening for clamping a screw in the closed state, and the axis of the clamping opening forms an acute angle with the extending direction of the axis of the clamp body towards the direction far away from the clamp body in the extending direction of guiding the screw to be implanted in the clamping opening.

6. The nail pusher according to claim 5, wherein the angle formed by the axis of the clamping opening and the axis of the forceps body ranges from 30 ° to 60 °.

7. The tacker according to claim 5, wherein said lower surface of said plier body is a mirror surface.

8. A medical device for assisting implantation of an acetabular cup into an acetabular socket, the cup wall of the acetabular cup being provided with fixation holes, the medical device comprising:

the drilling guide as claimed in any one of claims 1 to 4, wherein the included angle between the axis of the through hole and the axis of the main rod is equal to the included angle between the axis of the fixing hole of the acetabular cup and the plane of the cup of the acetabular cup;

and/or, the nail placing device as set forth in any one of claims 5 to 7, wherein the included angle between the axis of the clamping opening and the axis of the forceps body is equal to the included angle between the axis of the fixing hole of the acetabular cup and the plane along which the cup of the acetabular cup is located.

9. The medical instrument of claim 8, further comprising a cannula for establishing a working channel to the acetabular cup.

10. The medical instrument of claim 9, further comprising at least one of a drilling tool, a screwdriver, and an acetabular cup driver, wherein the drilling tool is configured to bore a hole through the sleeve in an acetabular socket; the screwdriver is used for implanting a screw into the acetabulum fossa through the sleeve; the acetabular cup impactor is used for being detachably connected with the acetabular cup through the sleeve and receiving impact.

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