Puncture suction device

Abstract

The utility model belongs to the technical field of medical equipment, and particularly relates to a puncture suction device which comprises a cylinder body, a needle head is installed on a nipple at the tail end of the cylinder body, a piston is movably arranged in the cylinder body and connected with a plug handle through a plug shaft, and two guide sleeves which are distributed in an axial symmetry mode are arranged on the outer side of the cylinder body. A sliding rod slides in each guide sleeve in the movement direction of the piston, one end of each sliding rod is fixedly connected with the piston handle, the other end of each sliding rod is hinged to a first connecting rod, each first connecting rod is hinged to a second connecting rod, each second connecting rod is hinged to the outer side of the barrel, and the sliding rods and the corresponding guide sleeves are provided with limiting structures for preventing the piston from sliding back. Through an innovative adjustable negative pressure suction mode, medical staff can easily and accurately puncture and suck nodules with only one hand, the suction amount can be flexibly controlled according to actual needs, the functionality and operability of an injector are improved, and clinical operation is more accurate, simpler, more convenient, more efficient and more rapid.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a puncture and suction device. Background Art

[0002] Fine needle aspiration of thyroid nodules is a technique for obtaining pathological cells of thyroid nodules through fine needle aspiration for pathological diagnosis. This technique is the most accurate, economical and effective method for evaluating the benign and malignant nature of thyroid nodules. However, the quality and quantity of the samples obtained directly affect the sensitivity and accuracy of the pathological diagnosis results. Factors affecting the quality of the samples include the operator's operating level, the functionality and operability of the puncture needle, the hardness, size and location of the nodule, etc.

[0003] At present, during clinical puncture operations, the needle of the existing puncture syringe is punctured into the nodule, and then the piston of the syringe is pulled outward through the plug handle at the rear end of the syringe, so that negative pressure is generated in the syringe cavity to achieve the purpose of extracting cells. However, when medical personnel use the existing puncture syringe to puncture nodules, especially when encountering smaller nodules, medical personnel must be able to accurately control the moving direction of the needle tip, but the existing puncture syringe cannot meet this requirement. At the same time, the parts operated by medical personnel are mainly concentrated on the plug handle at the rear end of the puncture syringe, which will make it difficult for medical personnel to stably control the pulling force and the direction of movement of the needle tip, and the operation is extremely difficult. In addition, when the piston in the puncture syringe is pulled to generate negative pressure, the force required to pull the piston to move is large because it needs to overcome the large negative pressure, especially when the hardness inside the nodule is high, the difficulty of operation is significantly increased, and it will also cause the puncture operation time to be extended, increase the patient's pain, reduce clinical operation efficiency, increase time cost, and cause discomfort such as pain to the hands of medical personnel. Utility Model Content

[0004] In order to solve the above defects in the prior art, the utility model discloses a puncture and suction device, which is implemented by adopting the following technical solutions.

[0005] A puncture and suction device comprises a cylinder, a needle is installed on the nipple at the end of the cylinder, a piston is movable in the cylinder, the piston is connected to a plug handle through a plug shaft, two axially symmetrical guide sleeves are arranged on the outside of the cylinder, a sliding rod is sliding along the movement direction of the piston in each of the guide sleeves, one end of the sliding rod is fixedly connected to the plug handle and the other end is hinged to a first connecting rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, the other end of the second connecting rod is hinged to the cylinder, and a limiting structure is arranged on the corresponding guide sleeve to prevent the piston from sliding back.

[0006] Furthermore, a pressure plate is installed at the hinge between the first connecting rod and the second connecting rod.

[0007] Furthermore, the limiting structure includes two limiting rods, and the two limiting rods slide radially along the cylinder body in the sliding grooves on the two guide sleeves respectively. One end of the limiting rod has a tooth tip and the other end is provided with a pull ring. The tooth tip and the tooth groove on the sliding rod form a ratchet fit. A limiting cavity coaxial with the sliding groove is also provided on the guide sleeve. A limiting ring is provided on the limiting rod, and the limiting ring is slidably arranged in the limiting cavity. A reset spring is also sleeved on the limiting rod, and the reset spring is located between the limiting ring and the side wall of the limiting cavity.

[0008] Furthermore, the outer side of the cylinder is provided with a window, and the window is provided with scales.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] The utility model connects the plug handle with the cylinder body to form a crank slider mechanism through two groups of symmetrical connecting rod structures formed by a sliding rod, a first connecting rod and a second connecting rod. During the entire operation process, the medical staff presses the pressure plate by grasping with one hand instead of pulling the plug handle at the end of the syringe with the fingers, which is more conducive to controlling the moving direction of the syringe needle tip, does not make the medical staff feel the operation is laborious and does not make the medical staff's fingers feel painful, is more comfortable to use, and is more in line with the working habits of the medical staff, thereby ensuring that the medical staff can complete the puncture operation accurately, stably, labor-saving and quickly, improves the functionality and operability of the syringe, reduces the puncture pain that the patient may suffer, improves the accuracy and safety of the puncture, saves time cost, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the utility model.

[0012] Figure 2 It is an overall cross-sectional schematic diagram of the utility model.

[0013] Figure 3 It is a partial cross-sectional schematic diagram of the utility model.

[0014] Figure 4 It is an overall cross-sectional schematic diagram of the utility model.

[0015] Figure 5 It is a schematic diagram of the cylinder.

[0016] Figure 6 It is a schematic diagram of the cylinder cross section.

[0017] The reference numbers in the figure are as follows: 1. cylinder; 2. window; 3. nipple; 4. guide sleeve; 5. slide groove; 6. needle; 7. piston; 8. plug shaft; 9. plug handle; 10. slide rod; 11. tooth groove; 12. first connecting rod; 13. second connecting rod; 14. pressure plate; 15. limit rod; 16. pull ring; 17. reset spring; 18. limit cavity; 19. limit ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below through embodiments and in combination with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present utility model, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0021] like Figure 1 , 2As shown in Figure 4, a puncture and suction device comprises a cylinder 1, a needle 6 is installed on the nipple 3 at the end of the cylinder 1, a piston 7 is movable in the cylinder 1, the piston 7 is connected to the plug handle 9 through the plug shaft 8, two axially symmetrically distributed guide sleeves 4 are arranged on the outside of the cylinder 1, a sliding rod 10 is sliding along the movement direction of the piston 7 in each of the guide sleeves 4, one end of the sliding rod 10 is fixedly connected to the plug handle 9 and the other end is hinged to a first connecting rod 12, the other end of the first connecting rod 12 is hinged to one end of the second connecting rod 13, the other end of the second connecting rod 13 is hinged to the cylinder 1, and a limiting structure for preventing the piston 7 from sliding back is arranged on the corresponding guide sleeve 4.

[0022] like Figure 2 As shown, a pressure plate 14 is installed at the hinge between the first connecting rod 12 and the second connecting rod 13.

[0023] like Figure 3 As shown, the limiting structure includes two limiting rods 15, and the two limiting rods 15 slide radially along the cylinder 1 in the slide grooves 5 on the two guide sleeves 4 respectively. One end of the limiting rod 15 has a tooth tip and the other end is provided with a pull ring 16. The tooth tip forms a ratchet match with the tooth groove 11 on the slide rod 10. A limiting cavity 18 coaxial with the slide groove 5 is also provided on the guide sleeve 4. A limiting ring 19 is provided on the limiting rod 15, and the limiting ring 19 is slidably set in the limiting cavity 18. A reset spring 17 is also sleeved on the limiting rod 15, and the reset spring 17 is located between the limiting ring 19 and the side wall of the limiting cavity 18.

[0024] The limiting structure includes two limiting rods 15, which slide radially along the cylinder 1 in the slide grooves 5 on the two guide sleeves 4 respectively. One end of the limiting rod 15 has a tooth tip and the other end is provided with a pull ring 16. The tooth tip forms a ratchet fit with the tooth groove 11 on the slide rod 10. The limiting rod 15 is provided with a reset spring 17 and a limiting ring 19. The reset spring 17 and the limiting ring 19 are located in a limiting cavity 18 on the wall surface of the slide groove 5. One end of the reset spring 17 is connected to the inner wall of the limiting cavity 18 and the other end is connected to the limiting ring 19 on the corresponding limiting rod 15.

[0025] like Figure 1 , 4 As shown in FIG. 5 , the outer side of the cylinder 1 has a window 2 and the window 2 has scales.

[0026] The working principle or process of the utility model is as follows:

[0027] In the initial state, the piston 7 is in a position to completely discharge the air in the cylinder 1, the axial distance between the plug handle 9 and the guide sleeve 4 is the smallest, the angle between the first connecting rod 12 and the corresponding second connecting rod 13 is the smallest, the return spring 17 is in a compressed state, and the tooth tip of the limit rod 15 is inserted into the tooth groove 11 on the corresponding slide rod 10.

[0028] When the utility model is needed for puncture, the utility model is held in one hand to insert the needle 6 into the nodule, and then the two pressing plates 14 are pressed tightly with the palm of the hand, so that the two pressing plates 14 move radially toward each other along the cylinder 1, and the two pressing plates 14 simultaneously drive the two second connecting rods 13 to swing toward the cylinder 1, and the two second connecting rods 13 respectively drive the corresponding sliding rods 10 to slide in the guide sleeve 4 through the corresponding first connecting rods 12, and the two sliding rods 10 drive the piston 7 to vacuum the cylinder 1 through the plug handle 9 and the plug shaft 8, and the cells in the nodule enter the cylinder 1 through the needle 6 under the action of negative pressure. When the cells in the cylinder 1 reach the required scale on the window 2, the continued pressing of the two pressing plates 14 is stopped and the pulling of the piston 7 is ended, thereby saving the physical strength of medical staff.

[0029] At this time, the tooth tips of the two limit rods 15 are inserted into the tooth grooves 11 on the corresponding slide rod 10 under the action of the corresponding reset springs 17 to prevent the reset movement of the slide rod 10 and further prevent the piston 7 from resetting under the action of negative pressure, thereby preventing the piston 7 from sliding back due to the negative pressure when it loses its traction effect, causing the extracted cells to flow back into the body.

[0030] During the process of extracting cells, the two slide bars 10 move synchronously, and the two limit rods 15 bounce back and forth under the action of the corresponding return springs 17 and the tooth grooves 11 on the slide bars 10 respectively without blocking the movement of the slide bars 10 .

[0031] When the cells extracted from the cylinder 1 reach the required amount, the needle 6 is pulled out from the puncture site. After the needle 6 is pulled out, there is no pressure difference at both ends of the cells in the cylinder 1. As long as no pressure is applied to the two pressure plates 14, the piston 7 will not move.

[0032] When the cells in the cylinder 1 need to be transferred to the specimen bottle, the two pull rings 16 are pulled, and the two pull rings 16 drive the tooth tips of the limit rod 15 to disengage from the tooth grooves 11 on the slide bar 10 and further compress the reset spring 17, and then the plug handle 9 is pressed, and the plug handle 9 drives the piston 7 to push the cells into the specimen bottle through the plug shaft 8. After the cells in the cylinder 1 are completely pushed out, the force on the two pull rings 16 is removed, and the two limit rods 15 are reset under the reset action of the corresponding reset springs 17 and reinserted into the tooth grooves 11 on the slide bar 10.

[0033] When the piston 7 pushes the cells out of the cylinder 1, the plug handle 9 drives the slide rod 10, the first connecting rod 12 and the second connecting rod 13 to perform a reset movement.

Claims

1. A puncture suction device, comprising a barrel (1), a needle (6) being mounted on a nipple (3) at the end of the barrel (1), a piston (7) being movable in the barrel (1), the piston (7) being connected to a plug handle (9) via a plug shaft (8), characterized in that: Two axially symmetrical guide sleeves (4) are arranged on the outside of the cylinder (1), and a slide rod (10) is arranged inside each of the guide sleeves (4) to slide along the movement direction of the piston (7). One end of the slide rod (10) is fixedly connected to the plug handle (9) and the other end is hinged to a first connecting rod (12). The other end of the first connecting rod (12) is hinged to one end of a second connecting rod (13), and the other end of the second connecting rod (13) is hinged to the cylinder (1). A limiting structure for preventing the piston (7) from sliding back is arranged on the corresponding guide sleeve (4).

2. A puncture and suction device according to claim 1, characterized in that: A pressure plate (14) is installed at the hinge between the first connecting rod (12) and the second connecting rod (13).

3. A puncture and suction device according to claim 1, characterized in that: The limiting structure comprises two limiting rods (15), the two limiting rods (15) respectively slide radially along the cylinder (1) in the slide grooves (5) on the two guide sleeves (4), one end of the limiting rod (15) has a tooth tip and the other end is provided with a pull ring (16), the tooth tip and the tooth groove (11) on the slide rod (10) form a ratchet fit, the guide sleeve (4) is also provided with a limiting cavity (18) coaxial with the slide groove (5), the limiting rod (15) is provided with a limiting ring (19), the limiting ring (19) is slidably arranged in the limiting cavity (18), and the limiting rod (15) is also sleeved with a return spring (17), the return spring (17) is located between the limiting ring (19) and the side wall of the limiting cavity (18).

4. A puncture and suction device according to claim 1, characterized in that: The outer side of the cylinder (1) is provided with a window (2), and the window (2) has scales.

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