CN115040211A - Luoyang shovel-type puncture sampling needle for ultrasonic endoscope and its use method - Google Patents

Abstract

The invention relates to a Luoyang shovel-type puncture sampling needle for ultrasonic endoscope, which includes a handle assembly, an outer tube, a core wire and a needle tube; The needle tube and the core wire are arranged coaxially in the inside in turn; the needle tube is connected with the rotating part in the handle assembly, and the core wire is connected with the plug-in part in the handle assembly; the front end of the needle tube is sequentially composed of a needle tip, a needle cavity and a needle tip, and the needle cavity The outer circumference of the needle tube is provided with a long groove communicating with the inner cavity, so that the front end of the needle tube forms a Luoyang shovel-shaped structure. The front end of the puncture sampling needle adopts the Luoyang shovel structure, which increases the sampling amount during the inspection and provides a reliable guarantee for the subsequent detection and diagnosis.

Description

Luoyang shovel-type puncture sampling needle for ultrasonic endoscope and its use method

technical field

The invention relates to a Luoyang shovel-type puncture sampling needle for an ultrasonic endoscope and a method for using the same, which are used in the diagnosis and treatment process of an ultrasonic endoscope of the digestive tract, and belong to a medical device.

Background technique

With the continuous progress and development of minimally invasive medical technology, most of the diseases in the digestive tract are usually diagnosed and treated with endoscopic instruments. Due to the small trauma, accurate positioning and convenient inspection and operation of the puncture sampling needle for endoscopy, it has become a relatively common practice. means of endoscopy.

Most of the puncture needles currently in use have a small sampling volume, especially for hard diseased tissue. Repeated puncture is required in the process of sampling the diseased tissue, and the sampled tissue has more liquid components and less solid components, which brings great advantages to detection and diagnosis. Due to the limitations, there is a possibility that repeated sampling is required.

SUMMARY OF THE INVENTION

The technical problem to be solved by the invention is to provide a Luoyang shovel-type puncture and sampling needle for ultrasonic endoscope, the front end of the puncture and sampling needle adopts a Luoyang shovel structure, which increases the sampling amount in the inspection and provides reliable detection and diagnosis for subsequent detection and diagnosis. Assure.

In order to solve the above problems, the specific technical solutions created by the present invention are as follows: a Luoyang shovel-type puncture sampling needle for ultrasonic endoscope, comprising a handle assembly, an outer tube, a core wire and a needle tube; the front end of the handle assembly is connected with the outer tube , in the central cavity of the outer tube, the needle tube and the core wire are arranged coaxially from the outside to the inside; the needle tube is connected with the rotating part in the handle assembly, and the core wire is connected with the plug-in part in the handle assembly; the front end of the needle tube is in turn connected by the needle tip , needle cavity and needle tip, the outer circumference of the needle cavity is provided with a long groove communicating with the inner cavity, so that the front end of the needle tube forms a Luoyang shovel-shaped structure.

The handle assembly includes a fixed handle, a positioning ring, a core tube, a rear end handle, a thin steel tube, a steering wheel, and a core wire handle; the core tube is coaxially connected to the cavity of the fixed handle, and the front end of the core tube is connected to the outer tube , the rear end of the core tube is slidably connected with the inner cavity of the rear end handle; the front end of the rear end handle is coaxially matched with the outer circumference of the fixed handle, a thin steel tube is coaxially arranged in the inner cavity of the rear end handle, and the front end of the thin steel tube is connected to the needle tube , the rear end of the thin steel pipe is connected with the direction wheel, the thin steel pipe and the direction wheel form a rotating part to drive the needle tube to rotate; the core wire handle is located at the rear end of the direction wheel as a plug-in part, and moves back and forth along the axis of the direction wheel, and the core wire The handle is connected with a core wire, and the front end of the core wire passes through the steering wheel, the thin steel tube and the needle tube in sequence, and extends or retracts at the front end of the inner cavity of the needle tube.

The outer circumference of the fixed handle is provided with limit scales and equidistantly distributed positioning slots, the outer circumference of the fixed handle is provided with a positioning ring, the positioning ring is provided with a button, and the button is connected with the elastic positioning sheet in the positioning ring, and the elastic The positioning piece is matched with any one of the positioning slots, and the rear end handle is fitted with the rear end surface of the positioning ring when it moves forward to the limit position.

The front-end inner cavity of the fixed handle is coaxially slid with the front-end handle, and a plane is milled on the front-end handle; a fixing screw is arranged at the front end of the outer circumference of the fixed handle, and the fixing screw is radially inserted into the cavity and the flat top of the front-end handle. The front end of the front end handle is provided with an external thread, the front end joint is arranged in the front end hole of the front end handle, and is connected with the outer thread of the front end handle through the inner thread at the rear end of the inner circumference of the front end cap, and the front end of the front end joint has a connection with the outside world. Quick change structure for structural connection.

The outer circumference of the front end handle is provided with a positioning scale along the axis direction, and the front end surface of the fixed handle is the reference position of the positioning scale degree.

The inner hole of the steering wheel is coaxially interfered with the hollow needle tube joint, and the outer circumference of the needle tube joint is sequentially provided with a positioning table, a limit boss and a process connection hole from back to front; The rear end surface of the table is fitted, the limit boss is clamped at the rear end of the rear end handle cavity, and the end of the rear handle is located between the limit boss and the positioning table; Glue to fix.

The front end of the core wire handle is provided with a spline shaft, and the front end of the spline shaft is connected with the core wire; the rear end of the needle tube connector extending direction wheel is provided with an inner hole, and the spline shaft is slidably matched in the inner hole of the needle tube connector.

The rear end of the core tube is provided with a convex snap point, and the rear end of the fixed handle is provided with a square groove corresponding to the position, and the convex snap point is engaged with the square groove; The limit end face of the front end of the pipe is provided with a chute on the limit end face, and the chute is slidably connected with the inner cavity of the rear end handle.

The outer edge of the needle tip is provided with a front edge; the long groove of the needle cavity is composed of a narrow slot and a window slot, and the front end of the narrow slot is communicated with the needle tip. When the width of the narrow slot is A, the width of the window slot is B It is larger than A, and is connected with the rounded corner of the end face of the narrow groove; the edge of the long groove is provided with a rear edge to form a one-way Luoyang shovel structure; or the long groove is provided with two groups, each with a narrow The slot and the window slot, and the long slots are staggered on both sides of the needle cavity, forming a two-way Luoyang shovel structure; , and a barb needle opposite to the advancing direction is arranged in each narrow groove to form a two-way narrow groove Luoyang shovel structure.

Adopt the method of using Luoyang shovel-type puncture sampling needle for ultrasonic endoscope according to claim 3, it is characterized in that comprising the following steps:

Step 1: Connect the front-end connector to the external device, then slide the front-end handle to adjust the relative distance from the external device. After adjustment, use the fixing screw to position and lock the front-end handle;

Step 2: Press the button, let the positioning ring slide on the fixed handle, adjust the puncture moving distance, the adjustment distance can be read through the limit scale, when the adjustment is completed, release the button, let the elastic positioning piece and the corresponding position of the positioning card slot snap positioning;

The third step: pull out the core wire handle to control the core wire to move backward along the axis direction, the rear end handle moves forward to reach the rear end surface of the positioning ring, and stops; control the rotation of the needle tube by rotating the direction wheel;

Step 4: After completing the clinical sampling, pull out the puncture sampling needle as a whole, and the core wire handle drives the core wire to move forward along the axis direction to push out the sampling sample.

The ultrasound endoscope of the present application uses a Luoyang spade puncture sampling needle to cut the needle tube into a Luoyang spade shape, and after the needle tube is punctured, the tissue that enters the needle tube is taken out as much as possible, and the purpose is to solve the problem of sampling in traditional digestive tract ultrasound endoscopy. It avoids the problem of inaccurate subsequent diagnosis and even requires repeated sampling because most of the sampling is tissue fluid or insufficient sampling. At the same time, the handle assembly is provided with a rotating part and a plugging part, which can realize the rotation of the needle tube and the plugging and unplugging of the core wire, and provide a more convenient operation function for sampling.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the Luoyang spade-type puncture sampling needle for ultrasonic endoscopy.

Fig. 2 is an overall cross-sectional view of a Luoyang spade-type puncture sampling needle for ultrasonic endoscopy.

FIG. 3 is a partial enlarged view of the front end of the sampling needle of the present application.

Figure 4a is a schematic diagram of the structure of the Luoyang shovel at the front end of the needle tube.

Figure 4b is a cross-sectional view taken along line A-A of Figure 4a.

Fig. 4c is a cross-sectional view taken along line B-B of Fig. 4a.

FIG. 4d is a C-C cross-sectional view of FIG. 4a.

Figure 5 is a structural diagram of the connection between the fixed handle and the positioning ring.

Figure 6 is a connection structure diagram of the front handle.

FIG. 7 is a structural diagram of the connection between the needle tube joint and the thin steel tube.

Figure 8 is a schematic diagram of the coordination of the needle tube joint, the steering wheel and the rear end handle.

Figure 9 is a schematic diagram of the connection of the core wire handle.

Figure 10 is a structural diagram of the rear end of the fixed handle.

FIG. 11 is a schematic diagram of the rear end structure of the core tube.

12 is a perspective view of the second embodiment of the needle tube Luoyang shovel structure.

Figure 13 is a bottom view of the second embodiment of the needle tube Luoyang shovel structure.

14 is a top view of the second embodiment of the needle tube Luoyang shovel structure.

15 is a perspective view of the third embodiment of the needle tube Luoyang shovel structure.

16 is a bottom view of the third embodiment of the needle tube Luoyang shovel structure.

17 is a top view of the third embodiment of the needle tube Luoyang shovel structure.

Detailed ways

As shown in Figures 1 to 3, a Luoyang spade-type puncture sampling needle for ultrasonic endoscopy includes a handle assembly A, an outer tube 1, a core wire 2 and a needle tube 3; the front end of the handle assembly A and the outer tube 1 In the central cavity of the outer tube 1, the needle tube 3 and the core wire 2 are arranged coaxially from the outside to the inside in turn; the needle tube 3 is connected with the rotating part in the handle assembly A, and the core wire 2 is connected with the insertion part in the handle assembly A. Connection; the front end of the needle tube 3 is composed of a needle tip 3-1, a needle cavity 3-2 and a needle tip 3-3 in turn, the front end 3-1 is in the shape of a gap with cutting edges on both sides, and the outer circumference of the needle cavity 3-2 is The accommodating cavity is provided with a long groove communicating with the inner cavity, so that the front end of the needle tube 3 forms a Luoyang shovel-shaped structure and can accommodate the extracted tissue.

As shown in Figure 2, the handle assembly A includes a fixed handle 6, a positioning ring 8, a core tube 14, a rear end handle 9, a thin steel tube 15, a steering wheel 10, and a core wire handle 11; the core tube 14 is coaxial Connected in the cavity of the fixed handle 6, the front end of the core tube 14 is connected to the outer tube 1, the rear end of the core tube 14 is slidably connected to the inner cavity of the rear end handle 9; the front end of the rear end handle 9 is the same as the outer circumference of the fixed handle 6. Coaxially, a thin steel tube 15 is coaxially arranged in the inner cavity of the rear end handle 9, the front end of the thin steel tube 15 is connected to the needle tube 3, the rear end of the thin steel tube 15 is connected to the steering wheel 10, and the thin steel tube 15 and the steering wheel 10 form a rotating part to drive the The needle tube 3 rotates; the core wire handle 11 is located at the rear end of the steering wheel 10 as a plug-in part, and moves back and forth along the axis of the steering wheel 10, connecting the core wire 2 on the core wire handle 11, and the front end of the core wire 2 passes through the direction in turn The wheel 10 , the thin steel tube 15 and the needle tube 3 are extended or retracted at the front end of the inner cavity of the needle tube 3 .

As shown in FIG. 5 , the outer circumference of the fixed handle 6 is provided with limit scales 6-2 and equidistantly distributed positioning grooves 6-1, and the outer circumference of the fixed handle 6 is provided with a positioning ring 8. There is a button 8-3, the button 8-3 is connected with the elastic positioning piece 8-1 in the positioning ring 8, the elastic positioning piece 8-1 is matched with any one of the positioning grooves 6-1, and the rear handle 9 moves forward When it reaches the limit position, it fits with the rear end surface of the positioning ring 8. This structure defines the movement limit position of the rear end handle 9 , and the position can be adjusted numerically through the limit scale 6-2 according to the individual differences of the patients, so as to realize the adjustment of the insertion depth of the needle tube 3 . A visual window 8-2 is provided on the circumference of the positioning ring 8 to ensure that the elastic positioning piece 8-1 is snap-fitted with the locking groove 6-1 at the designated position.

As shown in FIG. 6 , the inner cavity of the front end of the fixed handle 6 is coaxially slid with the front end handle 12, and a plane 12-2 is milled out on the front end handle 12; The fixing screw 7 is radially inserted into the cavity and is pressed against the plane 12-2 of the front end handle 12; the front end of the front end handle 12 is provided with an external thread, and the front end joint 4 is arranged in the front end hole of the front end handle 12, and passes through the front end cap 5 The inner thread at the rear end of the inner circumference is connected with the outer thread of the front handle 12 , and the front end of the front end joint 4 has a quick-change structure connected with the external structure. The outer circumference of the front end handle 12 is provided with a positioning scale 12-1 along the axis direction, and the front end surface of the fixed handle 6 is a reference position of the positioning scale 12-1 degrees. The front-end handle 12 is axially slid relative to the fixed handle 6, and is connected to the external equipment through the quick-change structure of the front-end joint 4. By positioning the degree of the scale 12-1, the positional relationship between the sampling needle of the present application and the external equipment can be accurately located , for the convenience of visual adjustment, the scale line 12-1 is displayed on both sides.

As shown in FIGS. 7 and 8 , the inner hole of the steering wheel 10 is coaxially fitted with the hollow needle tube joint 13 by coaxial interference. The stage 13-2 and the process connection hole 13-3; wherein, the front end surface of the steering wheel 10 is fitted with the rear end surface of the positioning platform 13-1, and the limiting boss 13-2 is clamped at the rear end of the inner cavity of the rear end handle 9, The end of the rear-end handle 9 is located between the limiting boss 13-2 and the positioning platform 13-1; the thin steel pipe 15 is inserted into the front end of the needle tube joint 13, and is glued and fixed through the process connection hole 13-3. The needle tube joint 13 not only plays the role of connection with the thin steel pipe 15, but also effectively connects with the steering wheel 10, ensuring that the rotation of the steering wheel follows the rotation of the steering wheel. Axis movement that does not transition.

As shown in FIG. 9 , the front end of the core wire handle 11 is provided with a spline shaft 11-1, and the front end of the spline shaft 11-1 is connected with the core wire 2; In the inner hole, the spline shaft 11-1 is slidably fitted in the inner hole of the needle tube joint 13. This structure realizes that the core wire handle 11 can be pulled out axially and does not rotate with the steering wheel 10 .

As shown in FIG. 10 and FIG. 11 , the rear end of the core tube 14 is provided with a convex snap point 14-1, and the rear end of the fixed handle 6 is provided with a square groove 6-3 corresponding to the position, and the convex snap point 14 -1 is snap-fitted with the square groove 6-3; the rear end face of the core tube 14 is provided with a limit end face 14-2 that is directly larger than the front end of the core tube 14, and the limit end face 14-2 is provided with a chute 14-3 , the chute 14-3 is slidably connected with the inner cavity of the rear handle 9 . The core tube 14 is effectively connected with the fixed handle 6 through the convex snap point 14-1, and the limit end face 14-2 is provided with a chute 14-3 to function as a sliding limit.

As shown in Figures 4a to 4d, in the first embodiment of the Luoyang shovel structure, the outer edge of the needle tip 3-1 is provided with a front cutting edge 3-1-1; the long groove 3-4 of the needle cavity 3-2 is formed by The narrow slot 3-4-1 is composed of the window slot 3-4-2. The front end of the narrow slot 3-4-1 is connected with the needle tip 3-1. When the width of the narrow slot 3-4-1 is A, the window The width B of the slot 3-4-2 is greater than A, and is connected with the rounded corner at the end face of the narrow slot 3-4-1; the edge of the long slot 3-4 is provided with a rear edge 3-4-3 , forming a one-way Luoyang shovel structure.

As shown in Figures 12 to 14, in the second embodiment of the Luoyang shovel structure, the outer edge of the needle tip 3-1 is provided with a front-end cutting edge 3-1-1; the long groove 3-4 of the needle cavity 3-2 is formed by The narrow slot 3-4-1 is composed of the window slot 3-4-2. The front end of the narrow slot 3-4-1 is connected with the needle tip 3-1. When the width of the narrow slot 3-4-1 is A, the window The width B of the slot 3-4-2 is greater than A, and is connected with the rounded corner at the end face of the narrow slot 3-4-1; 4-1 and window grooves 3-4-2, and the long grooves 3-4 are respectively staggered on both sides of the needle cavity 3-2, forming a two-way Luoyang shovel structure.

As shown in Fig. 15 to Fig. 17 , in the third embodiment of the Luoyang shovel structure, the long slot 3-4 is only provided with a narrow slot 3-4-1, and the two narrow slots 3-4-1 are respectively arranged in the needle cavity staggered On both sides of 3-2, and in each narrow slot 3-4-1, barb needles 3-5 opposite to the advancing direction are arranged to form a two-way narrow slot Luoyang shovel structure.

This patent is not limited to the three Luoyang shovel structures described in the schematic diagram, and the Luoyang shovel structure can use different Luoyang shovel needle tubes for puncturing for different diseased tissues.

Using the above-mentioned method for using the Luoyang spade puncture sampling needle for ultrasonic endoscopy includes the following steps:

Step 1: Connect the front-end connector 4 to the external device, then slide the front-end handle 12 to adjust the relative distance from the external device. After adjustment, the front-end handle 12 is positioned and locked by the fixing screw 7;

Step 2: Press the button 8-3, let the positioning ring 8 slide on the fixed handle 6, adjust the puncture moving distance, the adjustment distance can be read through the limit scale 6-2, when the adjustment is completed, release the button 8-3, Let the elastic positioning sheet 8-1 be clamped and positioned with the positioning slot 6-1 at the corresponding position;

The third step: pull out the core wire handle 11 to control the core wire 2 to move backward along the axis direction; the rear end handle 9 moves forward to reach the rear end surface of the positioning ring 8 and stops; control the rotation of the needle tube 3 through the rotating direction wheel 10;

Step 4: After completing the clinical sampling, pull out the puncture sampling needle as a whole, and the core wire handle 11 drives the core wire 2 to move forward along the axis direction to push out the sampling sample.

Claims (10)

1. A Luoyang shovel type puncture sampling needle for an ultrasonic endoscope is characterized in that: comprises a handle assembly (A), an outer tube (1), a core wire (2) and a needle tube (3); the front end of the handle assembly (A) is connected with the outer tube (1), and the needle tube (3) and the core wire (2) are coaxially arranged in the central cavity of the outer tube (1) from outside to inside in sequence; the needle tube (3) is connected with a rotating part in the handle assembly (A), and the core wire (2) is connected with a plugging part in the handle assembly (A); the front end of the needle tube (3) sequentially consists of a needle point (3-1), a needle cavity (3-2) and a needle tip (3-3), and the outer circumference of the needle cavity (3-2) is provided with a long groove communicated with the inner cavity, so that the front end of the needle tube (3) forms a Luoyang shovel-shaped structure.

2. A luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 1, wherein: the handle assembly (A) comprises a fixed handle (6), a positioning ring (8), a core pipe (14), a rear end handle (9), a thin steel pipe (15), a direction wheel (10) and a core wire handle (11); the core tube (14) is coaxially connected in the cavity of the fixed handle (6), the front end of the core tube (14) is connected with the outer tube (1), and the rear end of the core tube (14) is in sliding connection with the cavity of the rear-end handle (9); the front end of the rear end handle (9) is coaxially matched with the outer circumference of the fixed handle (6), a thin steel tube (15) is coaxially arranged in an inner cavity of the rear end handle (9), the front end of the thin steel tube (15) is connected with the needle tube (3), the rear end of the thin steel tube (15) is connected with the direction wheel (10), and the thin steel tube (15) and the direction wheel (10) form a rotating part to drive the needle tube (3) to rotate; the core wire handle (11) is used as a plugging part and is positioned at the rear end of the direction wheel (10) and moves back and forth along the axis direction of the direction wheel (10), the core wire (2) is connected on the core wire handle (11), the front end of the core wire (2) sequentially passes through the direction wheel (10), the thin steel pipe (15) and the needle tube (3) and extends out or retracts from the front end of the inner cavity of the needle tube (3).

3. The luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 2, wherein: the outer circumference of the fixed handle (6) is provided with limiting scales (6-2) and positioning clamping grooves (6-1) distributed in an equal distance, the outer circumference of the fixed handle (6) is provided with a positioning ring (8), the positioning ring (8) is provided with a key (8-3), the key (8-3) is connected with an elastic positioning sheet (8-1) in the positioning ring (8), the elastic positioning sheet (8-1) is matched with any one of the positioning clamping grooves (6-1), and the rear end handle (9) is attached to the rear end face of the positioning ring (8) when moving forwards to a limiting position.

4. The luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 2, wherein: the inner cavity at the front end of the fixed handle (6) is coaxially matched with the front end handle (12) in a sliding manner, and a plane (12-2) is milled on the front end handle (12); a fixing screw (7) is arranged at the front end of the outer circumference of the fixing handle (6), and the fixing screw (7) is radially inserted into the cavity and tightly propped against the plane (12-2) of the front-end handle (12); the front end of the front end handle (12) is provided with external threads, the front end joint (4) is arranged in a front end hole of the front end handle (12) and is connected with the external threads of the front end handle (12) through internal threads at the rear end of the inner circumference of the front end cap (5), and the front end part of the front end joint (4) is provided with a quick-change structure connected with an external structure.

5. The Luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 4, wherein: the outer circumference of the front end handle (12) is provided with a positioning scale (12-1) along the axis direction, and the front end surface of the fixed handle (6) is a reference position of the positioning scale (12-1) in degrees.

6. The luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 2, wherein: the inner hole of the direction wheel (10) is coaxially in interference fit with a hollow needle tube joint (13), and the outer circumference of the needle tube joint (13) is sequentially provided with a positioning table (13-1), a limiting boss (13-2) and a process connecting hole (13-3) from back to front; the front end face of the direction wheel (10) is attached to the rear end face of the positioning table (13-1), the limiting boss (13-2) is clamped at the rear end of the inner cavity of the rear-end handle (9), and the tail end of the rear-end handle (9) is located between the limiting boss (13-2) and the positioning table (13-1); the thin steel tube (15) is inserted into the front end part of the needle tube joint (13) and is fixed by gluing through the technical connecting hole (13-3).

7. The Luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 6, wherein: the front end of the core wire handle (11) is provided with a spline shaft (11-1), and the front end of the spline shaft (11-1) is connected with the core wire (2); the rear end part of the needle tube joint (13) extending out of the steering wheel (10) is provided with an inner hole, and the spline shaft (11-1) is in sliding fit with the inner hole of the needle tube joint (13).

8. The luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 2, wherein: the rear end part of the core tube (14) is provided with a convex clamping point (14-1), the rear end part of the fixed handle (6) is provided with a square groove (6-3) corresponding to the position of the fixed handle, and the convex clamping point (14-1) is clamped and matched with the square groove (6-3); the rear end face of the core tube (14) is provided with a limiting end face (14-2) with the diameter larger than that of the front end of the core tube (14), the limiting end face (14-2) is provided with a sliding groove (14-3), and the sliding groove (14-3) is in sliding connection with the inner cavity of the rear end handle (9).

9. A luoyang shovel type puncture sampling needle for an ultrasonic endoscope according to claim 1, wherein: the outer edge of the needle point (3-1) is provided with a front section cutting edge (3-1-1); the long groove (3-4) of the needle cavity (3-2) consists of a narrow groove (3-4-1) and a window groove (3-4-2), the front end of the narrow groove (3-4-1) is communicated with the needle point (3-1), when the width of the narrow groove (3-4-1) is A, the width B of the window groove (3-4-2) is larger than A, and the window groove is in transition connection with a fillet at the end face of the narrow groove (3-4-1); the edge of the long groove (3-4) is provided with a rear section cutting edge (3-4-3) to form a unidirectional Luoyang shovel structure; or two groups of long strip grooves (3-4) are arranged, each group is respectively provided with a narrow groove (3-4-1) and a window groove (3-4-2), and the long strip grooves (3-4) are respectively arranged on two sides of the needle cavity (3-2) in a staggered manner to form a bidirectional Luoyang shovel structure; or the long groove (3-4) is only provided with the narrow groove (3-4-1), the two narrow grooves (3-4-1) are respectively arranged at the two sides of the needle cavity (3-2) in a staggered way, and a barbed needle (3-5) with the direction opposite to the advancing direction is arranged in each narrow groove (3-4-1), so that a bidirectional narrow groove Luoyang shovel structure is formed.

10. The method of using a Luoyang shovel-type puncture sampling needle for an ultrasonic endoscope according to claim 3, comprising the steps of:

the first step is as follows: connecting the front end joint (4) with external equipment, then sliding the front end handle (12), adjusting the relative distance between the front end joint and the external equipment, and positioning and locking the front end handle (12) through a fixing screw (7) after the front end joint and the external equipment are adjusted;

the second step is that: pressing the key (8-3) to enable the positioning ring (8) to slide on the fixed handle (6), adjusting the puncture moving distance, wherein the adjusting distance can be read through the limiting scale (6-2), and when the adjustment is finished, loosening the key (8-3) to enable the elastic positioning sheet (8-1) to be clamped and positioned with the positioning clamping groove (6-1) at the corresponding position;

the third step: the core wire pulling handle (11) controls the core wire (2) to move backwards along the axis direction, and the rear end handle (9) moves forwards to reach the rear end face of the positioning ring (8) and stops; the needle tube (3) is controlled to rotate by rotating the direction wheel (10);

the fourth step: after clinical sampling is finished, the puncture sampling needle is integrally pulled out, and the core wire handle (11) drives the core wire (2) to move forwards along the axis direction to push out a sampling sample.

Images