CN212281599U - Surgical guide device - Google Patents

Abstract

The utility model relates to a surgical operation guiding device, which comprises a guiding piece and a sealing needle, wherein the guiding piece is provided with a needle passing hole which penetrates along the length direction of the guiding piece, the sealing needle comprises a needle core which can be matched with the needle passing hole of the guiding piece, the bottom of the guiding piece is provided with sawteeth, the outer surface of the sawteeth is a conical surface or a pyramid surface with an upward conical bottom, the outer surface of the needle point of the needle core is a conical surface or a pyramid surface with the same taper as the outer surface of the sawteeth, and the tip of the needle core is blunt; in an assembled state, the needle tip of the needle core of the sealing needle extends out of the bottommost end of the guide piece, and the outer surface of the needle tip is in seamless connection with the outer surface of the sawtooth. The utility model discloses utilize guide and sealed needle complex form to reduce human tissue and get into the guide pin passageway, be convenient for this device inserts the human body. The bottom of the guide piece is in a sawtooth shape, and the outer surface of the sawtooth shape is a conical surface, so that the guide piece is convenient to position and implant. The needle point is also a conical surface, and after the needle point is assembled, the needle point extends out of the bottom of the guide piece and is in seamless connection with the outer surface of the sawtooth, so that the sharp sawtooth is prevented from scratching a human body.

Description

Surgical guide device

Technical Field

The utility model relates to a guide technical field especially relates to a surgical operation guider.

Background

With the continuous development of medical science and technology, the surgical operation mode tends to the small wound and fast recovery minimally invasive surgery more, after a doctor completes accurate positioning by means of a guider or a surgical robot, a guide pin needs to be implanted into a human body quickly and accurately along positioning information, most of the prior guider or surgical robot technologies can only provide positioning and cannot perform subsequent operation, and therefore a guide piece type tool is needed between the guide pin and the guider or the surgical robot to implant the guide pin into the human body quickly and accurately.

Patent CN209107558U discloses a guide pin cannula for guiding a guide pin. It includes split type inside and outside guide, wherein the inside guide has the guide pin hole (be the through-hole) to make the guide pin get into. The split structure has higher requirements on the processing technology, the pore diameter of the outer guide piece and the excircle diameter of the inner guide piece need to be ensured to be tightly matched in the processing process, no gap exists, and the requirement on tolerance is higher. Moreover, the split structure needs to be clamped by an additional fixing device after assembly is completed, so that the split structure is ensured not to slide between the two devices in the operation process, and risks are generated when slight movement exists. And the sleeve in the patent is made of a material with poor wear resistance, so that the sleeve cannot be repeatedly sterilized and used. In addition, because the guide pin hole is left in the middle of the inner guide piece, the front end of the inner guide piece inevitably blocks the guide pin hole due to human muscle tissues in the process of entering a human body, so that certain resistance is generated, the bone surface cannot be quickly and accurately reached, and the operation time is prolonged.

Patent CN210962238U discloses a guide pin, which utilizes the cooperation of the stylet and the guide sleeve, so that the opening of the guide sleeve is blocked by the stylet, and the resistance can be prevented from being generated. When the Kirschner wire is used, the needle core is screwed out, and then the Kirschner wire is inserted into the guide sleeve for subsequent positioning. The device has tentatively realized preventing human tissue to get into the purpose of guide pin bushing, but guide pin bushing wherein is smooth straight tube structure, does not set up any handle, and the doctor's operation of being very inconvenient for. The guide pin can be connected with the needle core of the guide pin only by welding a nut at the tail end of the guide sleeve, so that the guide precision is seriously influenced, the follow-up high-precision positioning is not facilitated, and the development direction of the current minimally invasive surgery is not met. And the split structure is easy to fall off in the using process, so that danger is caused. Most importantly, the guide pin is matched and connected with the external thread of the needle core of the guide pin by utilizing the internal thread of the nut welded at the tail part of the guide sleeve. The guide pin has the defect that when the guide pin needle core or the Kirschner wire is inserted into the guide sleeve from the nut, the needle point is easy to touch the internal thread of the nut due to the manual operation, so that the abrasion of the needle point is caused. This is also the defect that most affects the performance of the pin.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can get into the less safe and reliable's surgery operation guider of human tissue damage under the human prerequisite of convenient quick access.

The utility model provides a surgical operation guiding device, including guide and sealed needle, the guide is equipped with the needle hole of crossing that runs through along its length direction, sealed needle include can with the needle core of the needle hole complex of crossing of guide, the bottom of guide is equipped with the sawtooth, the surface of sawtooth is conical surface or the pyramid face that the awl bottom is up, the needle point surface of needle core be with conical surface or the pyramid face that the toper of sawtooth surface is the same, and sharp-end blunt; in an assembling state, the needle point of the needle core of the sealing needle extends out of the bottommost end of the guide piece, and the outer surface of the needle point is in seamless connection with the outer surface of the sawtooth.

According to one aspect of the present invention, a first connecting structure is disposed on the top of the guiding member, an external thread is disposed on the outer side of the first connecting structure, and a buffer hole communicated with the needle passing hole is disposed on the top of the first connecting structure;

the sealing needle further comprises a first handle, a connecting groove is formed in the bottom of the first handle, internal threads which can be matched with the external threads on the first connecting structure are formed in the wall of the connecting groove, and one end, far away from the needle point, of the needle core is connected to the bottom of the connecting groove.

According to an aspect of the utility model, the pore wall of buffer hole is greater than for the diameter the face of cylinder of crossing the pinhole.

According to the utility model discloses an aspect, the pore wall of buffer hole is the vertex of a cone orientation the conical surface of crossing the pinhole.

According to an aspect of the present invention, the height of the first connecting structure is smaller than the depth of the connecting groove.

According to one aspect of the present invention, the guide further comprises a second handle connected around the bottom of the first connecting structure at equal intervals;

the second handle gradually extends downwards in a bending mode towards the direction far away from the needle passing hole.

According to an aspect of the utility model, the outer wall of guide is divided into the three-section that the diameter reduces in proper order towards keeping away from the direction of second handle, wherein apart from two sections outer walls that the second handle is the farthest are connected through the conical surface.

According to an aspect of the present invention, the first handle is semicircular and provided with a lifting groove.

According to an aspect of the present invention, the first connecting structure and the guide are integrally formed.

According to an aspect of the present invention, the second handle and the first handle are made of polymer material.

According to one aspect of the invention, the guide and the stylet are made of an alloy.

According to an aspect of the utility model, still include the dust cap, can with the first connection structure of guide passes through threaded connection.

According to the utility model discloses, utilize guide and sealed needle complex form for but the cavity passageway of sealed needle shutoff guide avoids human musculature to get into and produces the resistance, thereby saves the time of this process, improves whole operation efficiency. The needle passing hole in the guide piece can be designed according to different guide pin diameters, and the guide pin can be properly selected according to the size of the needle passing hole during use, so that the device is high in adaptability. According to the utility model discloses a conceive, the guide lower extreme is equipped with the sawtooth to make the sawtooth form a effect of pricking in advance when the guide reaches the skeleton surface, prevent that the guide from appearing sliding when taking out sealed needle or guide pin get into, lead to the positioning error. Moreover, the outer surface of the sawtooth is a conical surface (cone or pyramid) with an upward conical bottom, and the needle point of the needle core also forms a conical surface with the same taper, so that the front end of the device has a tendency of being folded towards the center, the contact area is smaller, and the resistance is smaller. Simultaneously, the nook closing member point end blunts, like this, and after the equipment is accomplished, the needle point forms continuous conical surface with the surface of sawtooth, and the needle point sharpness descends to some extent after the blunting, can guarantee this end when passing through human musculature, can not cause unnecessary hemorrhage because of this end is too sharp and lacerate the blood vessel in the musculature.

According to the utility model discloses a scheme, the guide is integrated into one piece with first connection structure, can not take place danger because of the part dislocation like this or drop at the operation in-process, and is reliable in structural style, has improved the security of operation. And also the coaxiality of the whole guide piece is increased, thereby improving the guiding precision.

According to the utility model discloses a scheme also sets up the handle on the guide-second handle, and equidistant setting of this handle is around the guide upper end to slight downwarping has formed the arc of the plug of being convenient for, thereby is favorable to this device dismouting.

According to the utility model discloses a scheme, the degree of depth that highly is less than the spread groove of sealed needle of the first connection structure of guide to the requirement to the two assembly precision has been reduced.

According to the utility model discloses a scheme, guide and nook closing member are 465 stainless steel, and this material wearability is good, and reusability is high, and the processing of being convenient for. The guide piece and the handle on the sealing needle are both made of polyether-ether-ketone, and the material has high strength and hardness, so that the reusability is improved.

According to the utility model discloses a scheme is equipped with the buffer hole on the first connecting structure to be convenient for aim at the needle utensil and cross the pinhole. The hole wall of the buffer hole can be a cylindrical surface, and the diameter of the hole wall is larger than that of the needle passing hole; the hole wall of the buffer hole can also be a conical surface, and the conical top faces the needle passing hole. The hole wall of the cylindrical surface is easier to process, and the hole wall of the conical surface is more convenient for needle alignment.

According to the utility model discloses a scheme, the guide still passes through threaded connection with sealed needle, but the first connecting structure of guide sets up the external screw thread, and sets up the internal thread at the cell wall of the spread groove of the first handle of sealed needle. Therefore, the needle point can not touch the thread on the guide piece when inserting the needle, and the needle point is prevented from being damaged.

Drawings

Fig. 1 is a front view schematically showing a state where a surgical guide according to an embodiment of the present invention is assembled;

FIG. 2 is a cross-sectional view schematically illustrating a guide member in a surgical guide according to one embodiment of the present invention;

FIG. 3 is a front view schematically illustrating a sealing needle in a surgical guide according to one embodiment of the present invention;

FIG. 4 is a sectional view schematically illustrating a combined state of a surgical guide according to an embodiment of the present invention;

FIG. 5 is a perspective view schematically illustrating a combined state of a surgical guide according to an embodiment of the present invention;

FIG. 6 is a front end block diagram schematically illustrating the assembled state of a surgical guide according to one embodiment of the present invention;

fig. 7 is a schematic view schematically illustrating the removal of a sealing needle of the surgical guide according to an embodiment of the present invention.

Detailed Description

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 embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Referring to fig. 1, a front view of the surgical guide of the present invention is shown, the device comprising a guide 1 and a sealing needle 2. The guide part 1 is used for providing a channel which directly reaches a positioning point (namely a focus point) for the guide pin and assisting a doctor to implant the guide pin into a human body smoothly. It follows that in operation guide 1 needs to be inserted into the body, and the lead channel therein facilitates the entry of the musculature of the body, thereby creating resistance. The sealing needle 2 thus functions to block the guide needle channel in the guide member 1 to prevent the muscular tissue of the human body from entering the guide needle channel to generate resistance during the insertion of the guide member 1 into the human body. In this way, the device has a work flow that the guide 1 and the sealing member 2 are assembled and inserted into the human body together, and then the sealing needle 2 is taken out. And then a guide pin for a subsequent operation is inserted into the guide member 1 through the guide pin channel. After the guide pin reaches the designated position in the bone, the guide member 1 is taken out.

Referring to fig. 2, the guide member 1 of the present invention is provided with a needle passing hole 11 penetrating along the length direction (i.e. vertical direction in fig. 1) inside, so as to form a channel for a guide needle to pass through (i.e. guide needle channel). The guide 1 is provided with a first connecting structure 13 at the upper end in fig. 2. The first connecting structure 13 is substantially cylindrical in shape and is provided with an external thread on the outside, by means of which it is connected to the sealing needle 2. Thus, neither the sealing needle nor the guide needle will hit the thread on the guide 1 when it is inserted, thereby avoiding wear on the needle tip. In order to leave a passage for the sealing needle 2 and the guide needle to be inserted into the needle passing hole 11, the top of the first connecting structure 13 is provided with a buffer hole 14 extending downward and communicating with the needle passing hole 11, so that both ends of the passage of the guide needle are opened. The utility model discloses in, for making the contact pin more convenient, establish the pore wall of buffer hole 14 into the face of cylinder that the diameter established to be greater than the diameter of pinhole 11, can play the cushioning effect like this for the doctor can put into buffer hole 14 with the needle point earlier when the operation, then aim at pinhole 11 again and insert. Such a pin insertion process is easier than directly aligning the narrow pin holes 11. In addition, the hole wall of the buffer hole 14 may also be a conical surface, with the bottom of the cone facing upwards and the top of the cone facing downwards (i.e. towards the needle passing hole), so as to facilitate needle alignment. Of course, the shape design of the buffer hole 14 can be selected according to actual requirements, the hole wall of the cylindrical surface is easier to process, and the hole wall of the conical surface is more beneficial to aligning. And simultaneously, the utility model discloses still include dustproof cap, its shape basically for one have the internal screw thread lid can, can be in the first connecting structure 13 department of guide 1 at the period spiro union that this device does not use, realize dustproof and sealed to mistake pinhole 11.

In view of the above, in actual practice, the doctor needs to pull the guide 1 out of the body. Thus, the guide 1 also has a second handle 12 to facilitate gripping by the physician. The connection position of the second handle 12 is substantially at the bottom of the first connection structure 13, which can be understood as the engagement position of the first connection structure 13 with the body of the guide 1. Which are arranged at equal intervals around the guide 1 and extend outwards (i.e. away from the needle through hole 11) to form a cross. Preferably, the extension is in the form of a downward curve forming a strip as shown in fig. 2, which is formed into a curvature to make the design ergonomic. The utility model discloses in, first connection structure 13 actually forms for the 1 top of guide upwards extends, and first connection structure 13 is integrated into one piece (the material is also the same) with guide 1 promptly, so can realize that each structure axiality is higher on it to the direction precision has been improved. In addition, the safety during use is improved, and the overall aesthetic appearance of the guide 1 is improved to some extent. The utility model discloses processing to 1 integral type of guide has adopted special processing technology, has guaranteed the machining precision.

The lower end of the guide 1 needs to be inserted into a human body, so the diameter of the outer wall C of the lower end is the minimum, and meanwhile, the incision caused by the guide to the body is smaller, thereby conforming to the concept of minimally invasive surgery. And in order to ensure the integral strength of the guide member 1, the diameter of the middle outer wall B is larger than that of the lowest end. The uppermost end of the guide 1 is, in turn, adjacent to the second handle 12, where it is seen that the force is greatest and therefore the diameter of the upper outer wall a is greatest, thereby ensuring strength. Therefore, the utility model discloses well guide 1's outer wall is from last to dividing into the three-section that the diameter reduces in proper order down, and guide 1 overall structure is the echelonment promptly. The outer walls of the two sections at the bottom are connected through conical surfaces, so that buffering is formed, and the purpose is to facilitate the insertion and the extraction of the guide piece 1. The lowermost end of the guide 1, i.e. the end remote from the second handle 12, is provided with serrations so that the serrations provide a pre-penetration when the guide 1 reaches the bone surface, preventing the guide 1 from slipping when the sealing needle 2 is removed or the guide needle is inserted, resulting in a positioning error. For this saw-tooth shape, it is distributed evenly in the axial direction at the lower end of the guide 1 and the tip forms a sharp point. In the present embodiment, the outer side wall of the saw blade is a pyramid surface with its base facing upward (i.e., facing the second handle 12), which facilitates insertion into the human body. In this connection, it is also understood that the lowermost end of the guide 1 is first formed as a pyramid surface and then the serrations are formed, and that this surface may also be a conical surface. When selecting materials, the whole material of guide 1 is 465 stainless steel, so has improved the wearability, is difficult for wearing and tearing and does not fear the corruption, used repeatedly after can disinfecting. The material has good processability, high processing precision and light weight. The second handle 12 is made of Polyetheretherketone (PEEK), which has high strength and hardness, and can improve reusability. Of course, other stainless steel or alloy can be selected for the guide 1; the material of the handle can also be other high polymer materials.

Referring to fig. 3, the sealing needle 2 of the present invention has a core 21 engaged with the needle passing hole 11 of the guide member 1, and the tip of the core 21 is located at the lower end of fig. 3. The sealing needle 2 further comprises a first handle 24. Referring to fig. 4, the bottom of the first handle 24 is provided with an upwardly extending attachment slot 23. The connecting groove 23 is a substantially cylindrical groove, the wall of which is provided with an internal thread so as to cooperate with an external thread on the first connecting means 13 of the guide 1, enabling the guide 1 and the sealing needle 2 to form a detachable threaded connection. Of course, the outer wall of the first connecting structure 13 and the groove wall of the connecting groove 23 may be provided with a slight inclination so as to facilitate the disassembly and assembly and the machining. The upper end of the needle core 21 (i.e. the end away from the needle tip) is connected to the bottom of the connecting groove 23. Wherein, the height of the first connecting structure 13 of the second handle 12 is less than the depth of the connecting groove 23, so that the top surface of the first connecting structure 13 can be prevented from hitting the bottom surface of the connecting groove 23 during assembly. This allows positioning of the guide 1 with the sealing needle 2 only by the bottom of the first handle 24 and the top of the second handle 12, reducing assembly accuracy requirements. The utility model discloses in, first handle 24 is semi-circular, and its middle part leans on the position to be equipped with and carries pull groove 24a, makes this handle also accord with human engineering like this, and the doctor of also being convenient for grips with the hand, pulls out to insert and rotatory operation. As shown in fig. 5, after the device is assembled, the lower end of the needle core 21 extends out of the lower end of the guide 1 to expose the needle tip, thereby facilitating the penetration of the device through human muscle tissue to the bone surface. In the present embodiment, the outer surface of the needle tip of the needle core 21 is also a pyramidal surface, and the taper is the same as that of the outer surface of the saw tooth. Thus, when the needle point is exposed out of the bottom end of the guide part 1 in an assembled state, the outer surfaces of the needle point and the saw teeth can form a seamless pyramid surface (when the outer surface of the saw teeth is a conical surface, the outer surface of the needle point is also a conical surface), so that the situation that the saw teeth are sharp and cut blood vessels in muscle tissues to cause unnecessary bleeding is avoided. Meanwhile, the front end of the guide piece 1 is folded towards the center in this way, so that the contact area of the guide piece and a human body is smaller, and the resistance is smaller. As shown in FIG. 6, the sharp end D of the needle point of the stylet 21 of the present invention is blunt-ended, so that the front end of the device is not too sharp, and the above-mentioned conical surface design can also avoid unnecessary scratch to human tissue. The threaded connection of the first handle 24 and the second handle 12 allows the device to be quickly assembled and disassembled and quickly positioned. The first handle 24 is made of polyetheretherketone and the needle core 21 is made of 465 stainless steel, which is selected for the same purpose as the guide 1, and other similar materials may be selected as mentioned above.

In the operation process, a doctor establishes path information through preoperative planning, a scalpel is used for scratching a tiny incision on the surface of a human body at a corresponding position, and then the guide piece 1 and the sealing needle 2 are assembled, namely the needle core 21 is inserted into the needle passing hole 11 and screwed tightly. After the device is assembled, the two handle parts can be held, and the assembled device can be quickly and conveniently implanted into a human body along the positioning information. When the bone surface is reached, the first handle 24 of the sealing needle 2 is rotated, and after the first handle 24 is rotated to the proper position, the sealing needle 2 is pulled out, and the pulling-out process is shown in fig. 7. The back end of the guide 1 is then gently tapped to drive the serration into the bone. The guide pin can then be inserted into guide 1 along needle aperture 11. After the guide pin is inserted into the bone to a proper depth, the second handle 12 of the guide member 1 can be pulled, so that the guide member 1 is withdrawn along the guide pin, and the implantation of the guide pin is completed.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A surgical guiding device comprises a guiding piece (1) and a sealing needle (2), wherein the guiding piece (1) is provided with a needle passing hole (11) penetrating along the length direction of the guiding piece, the sealing needle (2) comprises a needle core (21) matched with the needle passing hole (11) of the guiding piece (1), and sawteeth are arranged at the bottom of the guiding piece (1), and the surgical guiding device is characterized in that the outer surface of each sawtooth is a conical surface or a pyramidal surface with an upward conical bottom, the outer surface of a needle point of the needle core (21) is a conical surface or a pyramidal surface with the same conical degree as the outer surface of each sawtooth, and the tip of the needle point is blunt; in an assembling state, the needle point of the needle core (21) of the sealing needle (2) extends out of the bottommost end of the guide piece (1), and the outer surface of the needle point is in seamless connection with the outer surface of the sawtooth.

2. A surgical guide according to claim 1, wherein the top of the guide member (1) is provided with a first connecting structure (13), the outer side of the first connecting structure (13) is provided with an external thread, and the top is provided with a buffer hole (14) communicated with the needle passing hole (11);

the sealing needle (2) further comprises a first handle (24), a connecting groove (23) is formed in the bottom of the first handle (24), an internal thread matched with the external thread on the first connecting structure (13) is formed in the groove wall of the connecting groove (23), and one end, away from the needle point, of the needle core (21) is connected to the groove bottom of the connecting groove (23).

3. A surgical guide according to claim 2, wherein the wall of the relief bore (14) is cylindrical with a diameter greater than that of the needle passing bore (11).

4. A surgical guide according to claim 2, wherein the wall of the relief bore (14) is tapered with its apex facing the needle passing bore (11).

5. A surgical guide according to claim 2, wherein the height of the first coupling formation (13) is less than the depth of the coupling slot (23).

6. A surgical guide according to claim 2, wherein the guide (1) further comprises a second handle (12) attached at equal intervals around the bottom of the first attachment formation (13);

the second handle (12) gradually bends and extends downwards in the direction away from the needle passing hole (11).

7. A surgical guide according to claim 6, wherein the outer wall of the guide (1) is divided into three sections of successively decreasing diameter towards the direction away from the second handle (12), wherein the two sections of the outer wall furthest from the second handle (12) are connected by a tapered surface.

8. A surgical guide according to claim 2, wherein the first handle (24) is semi-circular and is provided with a lifting groove (24 a).

9. A surgical guide according to claim 2, wherein the first connecting formation (13) is integrally formed with the guide (1).

10. A surgical guide according to claim 9, wherein the second handle (12) and the first handle (24) are of polymeric material.

11. A surgical guide according to claim 10, wherein the guide (1) and the core (21) are of an alloy.

12. A surgical guide according to claim 2, further comprising a dust cap threadably connectable to the first coupling formation (13) of the guide (1).

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