Needle groove plate and puncture guide device using the same

Abstract

The present application relates to a needle groove plate and a puncture guide device using the needle groove plate. The needle groove plate has a front side and a rear side. The needle groove plate is provided with a plurality of needle grooves extending along the width direction of the needle groove plate and distributed in parallel along the height direction of the needle groove plate on the front side, and the needle grooves are open toward the front side; the needle groove plate is provided with a needle entry port extending to the needle entry end of the needle groove corresponding to each needle groove on the needle entry side, and the needle entry port is closed all around; the needle groove plate is provided with a needle exit port extending to the needle exit end of the needle groove corresponding to each needle groove on the needle exit side, and the needle exit port is open toward the rear side. The puncture guide channel provided by the needle groove plate according to the embodiment of the present application is composed of three sections: a needle entry port closed all around, a needle groove open toward the front side, and a needle exit port open toward the rear side, which is convenient for mold opening and conducive to mass production, and ensures the coaxiality during the puncture needle guidance process, thereby improving the stability of the puncture guidance.

Description

Technical Field

[0001] The present application relates to a medical auxiliary device, and more particularly, to a needle groove plate and a puncture guide device using the needle groove plate. Background Art

[0002] In today's society, prostate cancer is lurking around humans, and the incidence rate is gradually increasing. Early detection and timely treatment can save the patient's life, which requires a biopsy to obtain a pathological diagnosis. Under the guidance of ultrasound or CT, puncture is used to sample the lesion cells or tissues for pathological diagnosis. Among the medical devices used is a transperineal puncture guide frame used in conjunction with an intracavitary ultrasound probe. At present, the needle slot plates used in the transperineal puncture guide frame products used on the market mostly use guide holes that directly pass through both sides of the needle slot plate, which has the defect of difficulty in demolding, is not conducive to mass production, and thus increases the cost of use for patients. Some needle slot plates use open slots that pass through both sides of the needle slot plate to facilitate demolding, which makes it easy for the puncture needle to shake during the puncture process, and the puncture stability is poor. Summary of the Invention

[0003] The technical problem to be solved by the present application is to provide a needle groove plate that is convenient for demoulding and can ensure puncture stability, and a puncture guiding device using the needle groove plate, in response to the above-mentioned defects of the prior art.

[0004] In order to solve its technical problems, the present application proposes a needle groove plate in the first aspect, wherein the needle groove plate has a front side and a rear side, and the needle groove plate is provided with a plurality of needle grooves extending along the width direction of the needle groove plate and distributed parallel to the height direction of the needle groove plate on the front side, and the needle grooves are open toward the front side; the needle groove plate is provided with a needle entry port corresponding to each needle groove on the needle entry side, which passes through to the needle entry end of the needle groove, and the needle entry port is closed all around; the needle groove plate is provided with a needle exit port corresponding to each needle groove on the needle exit side, which passes through to the needle exit end of the needle groove, and the needle exit port is open toward the rear side.

[0005] According to one embodiment of the needle groove plate described in the first aspect of the present application, the needle outlet end of the needle entry port is aligned with the needle entry end of the needle groove, the needle entry end of the needle entry port is larger than the needle outlet end of the needle entry port, and the needle outlet port and the needle groove together enclose a closed channel.

[0006] According to an embodiment of the needle groove plate described in the first aspect of the present application, the needle groove is a U-shaped groove opening toward the front side, and has a needle groove upper limit surface, a needle groove lower limit surface and a needle groove rear limit surface; the needle entry port has a needle entry port lower limit surface aligned with the needle groove lower limit surface and a needle entry port rear limit surface aligned with the needle groove rear limit surface, and the needle entry port also has a semi-circular guide inclined surface extending obliquely from the needle entry end to the needle exit end, and the semi-circular guide inclined surface is aligned with the needle groove upper limit surface and the needle groove opening at the needle exit end; the needle exit port is a U-shaped groove opening toward the rear side, and has a needle exit port front limit surface aligned with the needle groove opening.

[0007] According to an embodiment of the needle groove plate described in the first aspect of the present application, the needle entry end of the needle outlet is further provided with a guiding slope extending obliquely toward the front side from the front limiting surface of the needle outlet.

[0008] In order to solve the technical problem, the present application proposes a puncture guiding device in the second aspect, including a puncture fixing frame installed in conjunction with an ultrasonic probe and a needle groove plate provided on the puncture fixing frame, wherein the needle groove plate is the needle groove plate mentioned above.

[0009] According to one embodiment of the puncture guiding device described in the second aspect of the present application, the puncture fixing frame includes an upper wrapping piece and a lower wrapping piece, the upper surface of the upper wrapping piece is provided with a mounting plate for mounting the needle groove plate, and the upper wrapping piece and the lower wrapping piece cooperate together to hold the outer surface of the ultrasound probe tightly and fix it.

[0010] According to one embodiment of the puncture guiding device described in the second aspect of the present application, the lower end of the needle groove plate is positioned on the mounting plate by a protrusion and groove matching structure, and the upper end of the needle groove plate is buckled on the mounting plate by an elastic snap-fitting structure.

[0011] According to one embodiment of the puncture guide device described in the second aspect of the present application, at least one mounting platform extending forward is provided at the lower end of the mounting plate, and a first downwardly recessed assembly groove is provided on each mounting platform, and a second assembly groove is provided from the first assembly groove along the height direction of the mounting plate. The lower end of the needle groove plate is provided with a raised rib protruding downward to fit into the first assembly groove corresponding to the first assembly groove, and an assembly reinforcement rib protruding backward from the rear side of the needle groove plate to fit into the second assembly groove corresponding to the second assembly groove.

[0012] According to one embodiment of the puncture guide device described in the second aspect of the present application, snap grooves that pass through the front side and the rear side are respectively provided on both sides of the upper end of the mounting plate, a snap seat is provided in the middle of the upper end of the needle slot plate, and snap cantilevers that extend backward to be inserted into the snap groove on the mounting plate are respectively provided on both sides of the snap seat, and the rear end of the snap cantilever forms a hook that locks the snap groove.

[0013] According to an embodiment of the puncture guiding device described in the second aspect of the present application, a rearwardly protruding limiting boss is provided on the rear side of the buckle seat, and a corresponding limiting groove for the limiting boss to be engaged is provided on the mounting plate.

[0014] The needle slot plate and the puncture guide device using the needle slot plate of the present application have the following beneficial effects: the puncture guide channel provided by the needle slot plate according to the embodiment of the present application is composed of three sections: a needle entry port that is closed all around, a needle slot that is open toward the front, and a needle exit port that is open toward the rear. During mold opening, the needle entry port is ejected from the mold, the needle slot is ejected from the front mold, and the needle exit port is ejected from the rear mold. This is convenient and easy to implement, and is conducive to mass production. At the same time, the cooperation of the needle entry port, the needle slot, and the needle exit ensures the coaxiality during the puncture needle guidance process, thereby improving the stability of the puncture guidance. The puncture guide device using the needle slot plate holds the intracavitary probe tightly through the upper and lower wrapping parts and fastens it through the arc-shaped handle. The arc-shaped handle has a certain deformation curvature and can withstand the fastening force of different deformation amounts, so it can be compatible with intracavitary probes with different diameters within a certain range. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments, in which:

[0016] Figure 1 This is a schematic diagram of the overall structure of a puncture guide device according to an embodiment of the present application;

[0017] Figure 2 yes Figure 1 The exploded structural diagram of the puncture guide device shown;

[0018] Figure 3 This is a schematic diagram of the exploded structure of a puncture fixation frame in one embodiment of the present application;

[0019] Figure 4 yes Figure 3 A schematic structural diagram of the upper package and the mounting plate at another angle shown in FIG;

[0020] Figure 5 yes Figure 2 A schematic structural diagram of another angle of the needle groove plate shown in FIG;

[0021] Figure 6 yes Figure 2 A structural cross-sectional view of the needle groove plate shown in ;

[0022] Figure 7 This is a partial structural cross-sectional view of a needle outlet in one embodiment of the present application;

[0023] Figure 8 This is a partial structural cross-sectional view of a needle entry port in one embodiment of the present application;

[0024] Figure 9 yes Figure 2 A longitudinal cross-sectional view of the puncture fixing frame and the intracavitary probe being installed in cooperation with each other;

[0025] Figure 10 yes Figure 2 FIG2 is a transverse cross-sectional view of the puncture fixing frame and the intracavitary probe being installed in cooperation with each other. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to explain this application and are not intended to limit this application. Furthermore, the embodiments and features of the embodiments in this application may be combined with each other unless there is a conflict.

[0027] See also Figure 1 and Figure 2 As shown, the puncture guide device 100 according to one embodiment of the present application is mainly composed of a puncture fixing frame 10 and a needle groove plate 20. The puncture fixing frame 10 is used to be installed in conjunction with the ultrasound probe, and the needle groove plate 20 is arranged on the puncture fixing frame 10 to provide a puncture guide channel for guiding the puncture needle to perform puncture. Figure 1 and Figure 2 As shown, the needle groove plate 20 is detachably mounted on the mounting plate 13 of the puncture fixing frame 10 , and the specific structure will be described in detail later.

[0028] See further Figure 2 、 Figure 3 and Figure 4 As shown, the puncture fixing frame 10 is mainly composed of an upper wrapping member 11, a lower wrapping member 12 and a mounting plate 13 provided on the upper wrapping member 11. The upper wrapping member 11 and the lower wrapping member 12 cooperate to hold the outer surface of the intracavitary probe 30 tightly and fix it (see Figure 9 ), the needle groove plate 20 is installed through the mounting plate 13 to guide the puncture operation. Figure 3 and Figure 4 As shown, the overall outline of the upper wrapping member 11 is roughly in the shape of an arc that matches the outer surface of the intracavitary probe. The mounting plate 13 is fixedly arranged on the upper surface 111 of the upper wrapping member 11 and can be integrally formed with the upper wrapping member 11. The lower surface of the upper wrapping member 11 is provided with a mounting groove 32 opened on the upper surface of the intracavitary probe (see Figure 9) is matched with the assembly rib 116, the upper wrapping piece 11 can limit its forward, backward, left, right and rotation by embedding the assembly rib 116 into the assembly groove 32 of the intracavitary probe 30. Furthermore, a first upper wrapping surface 115a and a second upper wrapping surface 115b are respectively formed at both ends of the lower surface of the upper wrapping piece 11, which are used to fit with the outer surface 31 of the intracavitary probe 30. In addition, a notch 112 is formed in the middle of one side of the upper wrapping piece 11, and a first rotating shaft mounting seat 113a and a second rotating shaft mounting seat 113b are respectively formed at both ends of the notch 112, and a first rotating shaft hole 114a and a second rotating shaft hole 114b are respectively coaxially provided in the first rotating shaft mounting seat 113a and the second rotating shaft mounting seat 113b. The inlet end of the first rotating shaft hole 114a is a normal vertical end face, and the inlet end of the second rotating shaft hole 114b forms a guide slope 1141. The upper wrapping piece 11 is also provided with a buckle groove 117 on the other side opposite to the notch 112. See again Figure 3 As shown, the overall outline of the main body 121 of the lower wrapping member 12 is also roughly in the shape of an arc that matches the outer surface of the intracavitary probe. A first lower wrapping surface 125a and a second lower wrapping surface 125b that fit the outer surface of the intracavitary probe are formed at both ends of the upper surface of the lower wrapping member 12, and an air escape groove 129 is formed between the first lower wrapping surface 125a and the second lower wrapping surface 125b (see Figure 9 ) to facilitate the compatibility of intracavitary probes with different diameters. Figure 3As shown, the lower wrapping member 12 forms a connecting post 122 on the side corresponding to the notch 112 of the upper wrapping member 11, and a first rotating shaft 123a and a second rotating shaft 123b extend coaxially from both ends of the connecting post 122, which are rotatably engaged with the first rotating shaft hole 114a and the second rotating shaft hole 114b. The end face of the first rotating shaft 123a is a normal vertical end face, while the end face of the second rotating shaft 123b forms an inclined end face 124 that mates with the guide inclined surface 1141 of the second rotating shaft hole 114b. The first rotating shaft 123a of the lower wrapping member 12 is inserted into the first rotating shaft hole 114a of the upper wrapping member 11, so that the connecting post 122 is placed in the notch 112. Then, the second rotating shaft 123b is elastically inserted into the second rotating shaft hole 114b through the inclined end face 124 along the guide inclined surface 1141 of the second rotating shaft hole 114b, so that the upper wrapping member 11 and the lower wrapping member 12 can be rotatably connected on opposite sides. An arc-shaped handle 126 extends upward from the other side of the lower wrapping member 12, and a buckle 127 is formed on the inner surface of the arc-shaped handle 126 to cooperate with the buckle groove 117 on the upper wrapping member 11. After the upper wrapping member 11 is embedded in the assembly groove 32 through the assembly rib 116 and installed on the outer surface of the intracavity probe 30, the lower wrapping member 12 is rotated relative to the upper wrapping member 11 around the axis 1231 of the first rotation axis 123a and the second rotation axis 123b by holding the arc-shaped handle 126, so that the arc-shaped handle 126 is elastically deformed to adapt to the shape of the intracavity probe 2 and the buckle 127 is buckled into the buckle groove 117, so that the upper wrapping member 11 and the lower wrapping member 12 can be buckled together to hold the intracavity probe 2 tightly, see Figure 10 As shown. Since the arc-shaped arm 1261 of the arc-shaped handle 126 has a certain deformation arc, it can withstand the clamping force of different deformation amounts, and thus can be compatible with intracavitary probes with different diameters within a certain range. In addition, in order to facilitate the grasping operation, the upper end of the arc-shaped handle 126 can also be provided with an anti-slip ridge 128, see Figure 3 shown.

[0029] When using the puncture fixing frame 10 according to the above embodiment of the present application, the upper wrapping piece 11 and the lower wrapping piece 12 are first assembled, that is: the first rotating shaft 123a of the lower wrapping piece 12 is inserted into the first rotating shaft hole 114a of the upper wrapping piece 11, so that the connecting column 122 is placed in the notch 112, and then the second rotating shaft 123b is elastically inserted into the second rotating shaft hole 114b along the guide inclined surface 1141 of the second rotating shaft hole 114b through the inclined end surface 124, and the upper wrapping piece 11 and the lower wrapping piece 12 are rotated and connected on opposite sides to complete the assembly of the puncture fixing frame 10. The assembled puncture fixture 10 is then installed on the intracavity probe 30. Specifically, the upper wrapping member 11 is inserted into the assembly groove 32 of the intracavity probe 30 via the assembly ribs 116 and mounted on the outer surface of the intracavity probe 30. The lower wrapping member 12 is then rotated relative to the upper wrapping member 11 by holding the curved handle 126. The curved handle 126 elastically deforms to conform to the shape of the intracavity probe 2, snapping the buckle 127 into the buckle groove 117. The upper and lower wrapping members 11 and 12 are then snapped together to tightly hold the intracavity probe 30, completing the assembly of the intracavity probe 30. The needle slot plate 20 and other components are then mounted on the mounting plate 13 to guide the puncture operation.

[0030] See also Figure 2 、 Figure 3 and Figure 5 As shown, the lower end of the needle groove plate 20 is positioned on the mounting plate 13 through the protrusion and groove matching structure, and the upper end of the needle groove plate 20 is buckled on the mounting plate 13 through the elastic snap-fitting structure. Figure 3 As shown, mounting platforms 135a and 135b extending forward from the upper wrapping member 11 are respectively provided on both sides of the lower end of the mounting plate 13, and a first assembly groove 136a and 136b recessed downward is defined on each mounting platform 135a and 135b. The mounting plate 13 also defines second assembly grooves 134a and 134b extending from the first assembly grooves 136a and 136b on both sides along the height direction of the mounting plate 13. Figure 4 As shown, the mounting plate 13 is formed with structural ribs 137a and 137b protruding backward on both sides of its rear side surface 138, providing sufficient depth space for the two second assembly grooves 134a and 134b. Figure 5 As shown, the lower end of the needle groove plate 20 is provided with downwardly protruding ribs 27a and 27b on both sides, which are used to snap into the first assembly grooves 136a and 136b on the mounting plate 13. The needle groove plate 20 also has two assembly reinforcement ribs 26a and 26b protruding backward from its rear side surface 212, which are used to snap into the corresponding second assembly grooves 134a and 134b on the mounting plate 13, thereby restricting the needle groove plate 20 to the mounting plate 13. For further reference, Figure 3As shown, the upper ends of the mounting plate 13 are provided with buckle grooves 132a and 132b respectively penetrating the front side and the rear side. The mounting plate 13 is also provided with a limiting groove 131 on the front side between the two buckle grooves 132a and 132b. Figure 2 As shown, a snap seat 25 is provided at the middle portion of the upper end of the needle slot plate 20. A rearwardly extending stopper 251 is provided on the rear side of the snap seat 25, corresponding to the stopper groove 131 on the mounting plate 13, for engaging with the stopper groove 131. Furthermore, snap arms 252a and 252b extending from front to back are provided on either side of the snap seat 25. The rear ends of each snap arm 252a and 252b form hooks 253a and 253b. When a force is applied to the snap arms 252a and 252b, causing them to deform inward and insert into the stopper grooves 132a and 132b on the mounting plate 13, the hooks 253a and 253b at the rear ends of the snap arms 252a and 252b engage the corresponding stopper grooves 132a and 132b, securing the needle slot plate 20 to the mounting plate 13.

[0031] The assembly process of the needle groove plate 20 and the mounting plate 13 according to the above embodiment of the present application is as follows: first, the lower end of the needle groove plate 20 is placed on the mounting platforms 135a and 135b of the mounting plate 13, and the raised ribs 27a and 27b at the lower end of the needle groove plate 20 are obliquely inserted into the first assembly grooves 136a and 136b to play a guiding role, driving the assembly reinforcement ribs 26a and 26b to be inserted into the second assembly grooves 134a and 134b, thereby limiting the forward and backward movement of the needle groove plate 20; then, by applying a force, the needle groove plate 20 is moved forward and backward. The snap-on cantilevers 252a and 252b at the upper end of 20 are squeezed and deformed inward and inserted into the snap-on grooves 132a and 132b on the mounting plate 13, so that the hooks 253a and 253b snap into the corresponding snap-on grooves 132a and 132b. The rear side surface 212 of the needle slot plate 20 fits into the front side surface 133 of the mounting plate 13, limiting the left and right movement of the needle slot plate 20. At the same time, the limiting boss 251 at the upper end of the needle slot plate 20 is inserted into the limiting groove 131 on the mounting plate 13, limiting the up and down movement of the needle slot plate 20.

[0032] According to the above embodiment of the present application, the needle groove plate 20 is mounted on the mounting plate 13 of the puncture fixing frame 10 through a detachable mounting structure, but the present application is not limited to this. According to different embodiments of the present application, the needle groove plate 20 can also be directly formed on the puncture fixing frame 10 and installed with the ultrasound probe.

[0033] See further Figure 2 、 Figure 5 and Figure 6As shown, the needle groove plate 20 has a front side 211 and a rear side 212. The needle groove plate 20 is provided with a plurality of needle grooves 22 on the front side 211. The plurality of needle grooves 22 extend along the width direction of the needle groove plate 20 and are distributed parallel to the height direction of the needle groove plate 20. The plurality of needle grooves 22 are also open toward the front side. The needle groove plate 20 has a needle entry port 23 on the needle entry side corresponding to each needle groove 22, which extends through to the needle entry end of the needle groove. The needle entry port 23 is completely closed. The needle groove plate 22 has a needle exit port 24 on the needle exit side corresponding to each needle groove 22, which extends through to the needle exit end of the needle groove. The needle exit port 24 is open toward the rear side. Moreover, the needle exit end of the needle entry port 23 is aligned with the needle entry end of the needle groove 22. The needle entry end of the needle entry port 23 is larger than the needle exit end of the needle entry port 23 to provide a needle insertion guide. The needle exit port 24 and the needle groove 22 together enclose a closed channel. In this way, each needle groove 22 and the needle inlet 23 and needle outlet 24 connected thereto together form a puncture guide channel, which can guide the puncture needle to puncture stably.

[0034] Specific combination Figure 2 、 Figure 6 and Figure 7 As shown, the needle slot 22 is a U-shaped groove formed on the front side 221 of the needle slot plate 20, opening toward the front. It has a lower limiting surface 221, a rear limiting surface 222, and an upper limiting surface 223. The needle outlet 24 is a U-shaped groove opening toward the rear, with a front limiting surface 241 aligned with the opening of the needle slot 22. Thus, the lower limiting surface 221, rear limiting surface 222, and upper limiting surface 223 of the needle slot 22, along with the front limiting surface 241 of the needle outlet 24, collectively enclose the puncture guide channel, limiting the puncture needle in the vertical, horizontal, and leftward directions, ensuring coaxiality on the exit side during puncture. Furthermore, the needle outlet 24 has a guide slope 242 extending obliquely forward from the front limiting surface 241 at the needle entry end, providing guidance for the puncture needle at the exit end.

[0035] Recombination Figure 5 、 Figure 6 and Figure 8As shown, the needle entry port 23 is completely closed, having a lower limit surface 231 aligned with the lower limit surface 221 of the needle groove, and a rear limit surface 232 aligned with the rear limit surface 222 of the needle groove. The needle entry port 23 also has a semi-circular guide bevel 235 extending obliquely from the needle entry end to the needle exit end, so that the needle entry end of the needle entry port 23 is larger than the needle exit end of the needle entry port 23, so as to provide a guide for the puncture needle at the needle entry end through the semi-circular guide bevel 235. In addition, the semi-circular guide bevel 235 has a needle entry upper limit surface 233 and a needle entry front limit surface 234 at the needle exit end, which are aligned with the needle groove upper limit surface 223 and the needle groove opening of the needle groove 22, respectively, to ensure smooth docking of the needle entry end of the needle entry port 23 and the needle groove 22. The lower limit surface 231, the rear limit surface 232, the upper limit surface 233 and the front limit surface 234 of the needle port 23 together surround a puncture guide channel, limiting the puncture needle up, down, left and right so that the puncture needle can only move axially, ensuring the coaxiality of the puncture needle on the needle insertion side during the puncture process.

[0036] According to the needle groove plate 20 of the above embodiment of the present application, the puncture guide channel is composed of three sections: a needle entry port 23 that is closed all around, a needle groove 22 that is open toward the front, and a needle exit port 24 that is open toward the back. When the mold is opened, the needle entry port 23 is ejected from the mold, the needle groove 22 is ejected from the front mold, and the needle exit port 24 is ejected from the back mold. This is convenient and easy to implement, and is conducive to mass production. Moreover, the cooperation of the needle entry port 23, the needle groove 22, and the needle exit port 24 ensures the coaxiality during the puncture needle guidance process and improves the stability of the puncture guidance. According to different embodiments of the present application, the shapes of the needle entry port 23, the needle groove 22, and the needle exit port 24 are not limited to the illustrated embodiment, and other suitable shapes can also be used. For example, a circular needle entry port and a semicircular needle groove can be used. The shape of the needle exit port is also more unrestricted, as long as it can cooperate with the needle groove to surround and form a puncture guide channel.

[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A needle groove plate, characterized in that: The needle groove plate has a front side and a rear side, and the needle groove plate is provided with a plurality of needle grooves extending along the width direction of the needle groove plate and distributed parallel to the height direction of the needle groove plate on the front side, and the needle grooves are open toward the front side; the needle groove plate is provided with a needle entry port corresponding to each needle groove on the needle entry side, which passes through to the needle entry end of the needle groove, and the needle entry port is closed all around and the needle exit end of the needle entry port is aligned with the needle entry end of the needle groove; the needle groove plate is provided with a needle exit port corresponding to each needle groove on the needle exit side, which passes through to the needle exit end of the needle groove, and the needle exit port is open toward the rear side, and the needle exit port and the needle groove together surround a closed channel; each needle groove and the needle entry port and needle exit port connected thereto together constitute a puncture guide channel.

2. The needle groove plate according to claim 1, characterized in that The needle entry end of the needle entry port is larger than the needle exit end of the needle entry port.

3. The needle groove plate according to claim 2, characterized in that: The needle groove is a U-shaped groove opening toward the front side, and has an upper limit surface of the needle groove, a lower limit surface of the needle groove and a rear limit surface of the needle groove; the needle entry port has a lower limit surface of the needle entry port aligned with the lower limit surface of the needle groove and a rear limit surface of the needle entry port aligned with the rear limit surface of the needle groove, and the needle entry port also has a semi-circular guide inclined surface extending obliquely from the needle entry end to the needle exit end, and the semi-circular guide inclined surface is aligned with the upper limit surface of the needle groove and the needle groove opening at the needle exit end; the needle exit port is a U-shaped groove opening toward the rear side, and has a front limit surface of the needle exit port aligned with the needle groove opening.

4. The needle groove plate according to claim 3, characterized in that The needle entry end of the needle outlet is further provided with a guiding inclined surface which extends obliquely toward the front side from the front limiting surface of the needle outlet.

5. A puncture guide device, comprising a puncture fixing frame mounted in conjunction with an ultrasonic probe and a needle groove plate provided on the puncture fixing frame, characterized in that: The needle groove plate is the needle groove plate according to any one of claims 1 to 4.

6. The puncture guide device according to claim 5, characterized in that: The puncture fixing frame includes an upper wrapping piece and a lower wrapping piece. The upper surface of the upper wrapping piece is provided with a mounting plate for mounting the needle slot plate. The upper wrapping piece and the lower wrapping piece cooperate to hold the outer surface of the ultrasound probe tightly and fix it.

7. The puncture guide device according to claim 6, characterized in that: The lower end of the needle groove plate is positioned on the mounting plate through a protrusion and groove matching structure, and the upper end of the needle groove plate is buckled on the mounting plate through an elastic snap-fitting structure.

8. The puncture guide device according to claim 7, characterized in that: At least one mounting platform extending forward is provided at the lower end of the mounting plate, and a first assembly groove which is recessed downward is provided on each mounting platform, and a second assembly groove is provided from the first assembly groove along the height direction of the mounting plate. The lower end of the needle groove plate is provided with a raised rib which protrudes downward to fit into the first assembly groove corresponding to the first assembly groove, and an assembly reinforcement rib which protrudes backward from the rear side of the needle groove plate to fit into the second assembly groove corresponding to the second assembly groove.

9. The puncture guide device according to claim 7, characterized in that: Snap grooves that pass through the front side and the rear side are respectively provided on both sides of the upper end of the mounting plate. A snap seat is provided in the middle of the upper end of the needle groove plate, and snap cantilevers that extend backward to be inserted into the snap grooves on the mounting plate are respectively provided on both sides of the snap seat. The rear end of the snap cantilever forms a snap hook that snaps into the snap groove.

10. The puncture guide device according to claim 9, characterized in that: A limiting boss protruding backward is provided on the rear side of the buckle seat, and a limiting groove for the limiting boss to be snapped into is correspondingly provided on the mounting plate.

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