A device and method for unblocking
By designing a guide tube and needle structure with specific angles, a single puncture and catheter placement can be achieved in the treatment of otitis media, solving the problem of needing to perform the procedure in multiple stages in existing technologies, and improving the convenience and safety of the operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- THE FIRST MEDICAL CENT CHINESE PLA GENERAL HOSPITAL
- Filing Date
- 2026-03-27
- Publication Date
- 2026-06-09
AI Technical Summary
In current treatments for otitis media, puncture and catheterization must be performed in two separate procedures, which increases patient discomfort and carries the risk of infection from a second puncture. Existing catheterization devices are simple in structure and inconvenient, making it impossible to complete puncture and catheterization in one go, and the catheter and puncture needle are prone to falling out.
Design a drainage device including a base, a guide tube, and a needle. The axes of the front, rear, and middle sections of the needle are configured at a specific angle. A limiting spring is used to temporarily limit the placement of the tube. The guide tube and the needle cooperate to achieve one-time puncture and tube placement. The front section of the needle is attached to the inner wall of the guide tube or is provided with a limiting guide to ensure reliable connection between the tube placement and the puncture needle.
It enables puncture and catheter placement to be completed in one session, reducing patient pain and infection risk, improving the convenience and accuracy of operation, and reducing operation time and infection risk.
Smart Images
Figure CN122163393A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical device technology, specifically to a dredging device and dredging method. Background Technology
[0002] Otitis media is a common ear infection, often caused by bacterial or viral infections or Eustachian tube dysfunction. It is frequently accompanied by symptoms such as tympanic cavity effusion and ear canal blockage. If left untreated, it can lead to complications such as hearing loss and tympanic membrane perforation. Currently, the standard clinical treatment for otitis media involves puncture and aspiration followed by tube placement for drainage. This procedure requires two separate steps, increasing patient discomfort and increasing the risk of infection from the second puncture. Furthermore, existing tube placement devices are structurally limited and lack targeted design. They cannot achieve simultaneous puncture and tube placement, and existing instruments that can perform both simultaneously cannot avoid the ear canal (existing Z-shaped structures cannot achieve simultaneous puncture and tube placement, only avoidance, such as CN201333126Y), obstructing the operator's view and failing to meet the needs for efficient and convenient treatment. Therefore, a new treatment device and method that can solve these problems is urgently needed. In addition, while some existing devices may perform puncture and tube placement in one step, the tube may not reliably connect to the puncture needle during insertion, making it prone to detachment.
[0003] Therefore, this invention is proposed. Summary of the Invention
[0004] The purpose of this invention is to provide a dredging device and a dredging method to solve the problems existing in the prior art.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a dredging device, comprising: a base, the front end of the base being fixedly connected to the rear end of a guide pipe, the front end of the rear guide pipe being connected to the rear end of a middle guide pipe, the front end of the middle guide pipe being connected to the rear end of a front guide pipe, and the front end of the front guide pipe being provided with a front end holding part. The guide tube is equipped with a needle, the front end of the needle tip is provided with a needle head, the rear end of the needle tip is connected to the front end of the needle middle section, the rear end of the needle middle section is connected to the front end of the needle rear section, and the rear end of the needle rear section extends out of the base. The axis of the rear guide tube is parallel to the axis of the front guide tube, and the angle between the axis of the middle guide tube and the axes of the rear and front guide tubes is greater than 90°; the axis of the front section of the needle always coincides with the axis of the front guide tube, the axis of the rear section of the needle always coincides with the axis of the rear guide tube, and the axis of the middle section of the needle always is parallel to the axis of the middle guide tube. The front end of the needle is provided with a limiting spring, which is used to temporarily limit the placement of the tube on the needle and abut against the front end holding part.
[0006] In an optional embodiment, the outer wall of the front section of the needle is always in contact with the inner wall of the front guide tube, or a limiting guide is provided between the outer wall of the front section of the needle and the inner wall of the front guide tube, so that the axis of the front section of the needle always coincides with the axis of the front guide tube.
[0007] In an optional embodiment, the front end of the needle is provided with a receiving groove, and the limiting spring is installed in the receiving groove. In its natural state, the highest point of the limiting spring protrudes out of the receiving groove.
[0008] In an optional embodiment, the interior of the front guide tube is a front guide cavity, which extends through the entire front guide tube in the front-rear direction, and the front section of the needle moves within the front guide cavity.
[0009] In an optional embodiment, the rear guide tube is provided with a rear guide cavity, which extends through the entire rear guide tube in the front-rear direction. Simultaneously, the rear guide cavity extends radially towards the front guide tube in the rear guide tube. The rear section of the needle moves in the rear guide cavity, and the rear end of the middle section of the needle moves with the rear section of the needle in the rear guide cavity.
[0010] In an optional embodiment, the rear end of the needle protrudes from the base body of the base, and the rear end of the needle is connected to a push-pull plate, wherein the push-pull plate and the base body are provided with a return spring.
[0011] In an optional embodiment, a grip plate is provided around the outer periphery of the base body.
[0012] In an optional embodiment, the needle tip of the needle extends out of the front guide tube, and a clamping and limiting piece is used to limit the distance between the middle guide tube and the middle section of the needle.
[0013] On the other hand, the present invention also provides a method for unblocking blockages, using the unblocking device described above, comprising the following steps: S1: Hold the base with one hand and press the push-pull tab of the needle to make the needle head extend out of the front guide tube; S2: Use a clamping and limiting piece to clamp the middle section guide tube and the middle section of the needle, so that the distance between the middle section guide tube and the middle section of the needle is determined; S3: Place the tube fitting onto the limiting spring and abut against the front end holding part; S4: Use the needle tip to puncture the first medium layer; S5: When the needle tip pierces the first medium layer and moves forward a certain distance, the placement tube is held in the first medium layer; S6: Keep the base and the guide tube stationary, remove the clamping limiting piece, the needle retracts and resets, the placement tube separates from the limiting spring and is simultaneously abutted by the stationary front end holding part, and the placement tube remains on the first medium layer.
[0014] The beneficial effects of this invention are as follows: (1) In use, medical staff hold the device, align the puncture needle with the tympanic membrane puncture site, and after the puncture is in place, the catheter is placed in the tympanic membrane puncture opening. Then, the puncture needle is withdrawn and released, completing the catheter placement and drainage operation. The entire process is completed in one go, without the need for an additional second puncture step. Most importantly, this application improves upon the existing technology by proposing a novel Z-shaped avoidance and relative sliding structure, in which a puncture needle is inserted inside the guide tube, the front end of the puncture needle is provided with a puncture needle head, the rear end of the front end of the puncture needle is connected to the front end of the middle end of the puncture needle, the rear end of the middle end of the puncture needle is connected to the front end of the rear end of the puncture needle, and the rear end of the rear end of the puncture needle protrudes from the base; the axis of the rear guide tube is parallel to the axis of the front guide tube, and the angle between the axis of the middle guide tube and the axis of the rear guide tube and the axis of the front guide tube is greater than 90°; the front end of the puncture needle The axis of the needle is always aligned with the axis of the front guide tube, the axis of the rear section of the needle is always aligned with the axis of the rear guide tube, and the axis of the middle section of the needle is always parallel to the axis of the middle guide tube. A limiting spring is provided at the front end of the needle to temporarily hold the placed tube against the needle and abut against the front stop. With the aid of a speculum, puncture and tube placement can be completed in one go. Furthermore, the continuous identical bends of the guide tube and puncture needle allow the hand area to avoid the ear canal, providing the operator with sufficient visibility and improving ease of operation. It should also be noted that the outer wall of the front section of the needle is always in contact with the inner wall of the front guide tube, or a limiting guide is provided between the outer wall of the front section of the needle and the inner wall of the front guide tube, ensuring that the axis of the front section of the needle is always aligned with the axis of the front guide tube, further improving the accuracy of the puncture.
[0015] (2) The catheter used in this device is attached to the inner wall of the catheter by a limiting spring. During the puncture of the puncture needle, the pressure between the catheter and the puncture needle is provided by an elastic pad, which ensures a reliable connection between the two and prevents the catheter from detaching from the puncture needle. When the puncture needle is retracted, the catheter is detached from the puncture needle under the action of the front end holding part. The ingenious structural design makes the catheter placement process easy to operate and improves the efficiency of the operation. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of a dredging method using a dredging device provided in one embodiment of the present invention.
[0018] Figure 2 This is a schematic diagram of the unblocking device provided in one embodiment of the present invention. Figure 1 (The puncture needle was not extended).
[0019] Figure 3 This is a schematic diagram of the unblocking device provided in one embodiment of the present invention. Figure 1 (The puncture needle extends).
[0020] Figure 4 This is a schematic diagram of the unblocking device provided in one embodiment of the present invention. Figure 2 (The puncture needle extends).
[0021] Figure 5 This is a schematic diagram of the unblocking device provided in one embodiment of the present invention (the puncture needle extends out of the limiting position tube).
[0022] Figure 6 This is a schematic diagram of the puncture needle in a dredging device provided in one embodiment of the present invention.
[0023] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point A in the middle.
[0024] Figure 8 This is a schematic diagram of the tube placement structure provided in one embodiment of the present invention.
[0025] The attached figures are labeled as follows: 1-Base; 11-Base body; 12-Holding plate; 2-Guide tube; 21-Front section guide tube; 211-Front end holding part; 212-Front section guide cavity; 22-Middle section guide tube; 23-Rear section guide tube; 231-Rear section guide cavity; 3-Puncture needle; 31-Puncture needle front section; 311-Puncture needle tip; 312-Accommodation groove; 313-Limiting spring; 32-Puncture needle middle section; 33-Puncture needle rear section; 34-Push-pull plate; 4-Reset spring; 5-Clamping limiting plate; 6-Placement tube. Detailed Implementation
[0026] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0027] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or position shown in the accompanying drawings, and are only for ease of description and should not be construed as limiting the technical solution. The terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. "Multiple" means two or more, unless otherwise explicitly defined.
[0028] Please see the appendix Figure 1-8 The purpose of this embodiment is to provide a dredging device, including: a base 1, the front end of which is fixedly connected to the rear end of the rear section guide tube 23 of the guide tube 2; the front end of the rear section guide tube 23 is connected to the rear end of the middle section guide tube 22; the front end of the middle section guide tube 22 is connected to the rear end of the front section guide tube 21; the front end of the front section guide tube 21 is provided with a front end holding part 211; a needle 3 is inserted inside the guide tube 2; the front end of the needle 3 has a needle head 311 at the front end of the needle front section 31; the rear end of the needle front section 31 is connected to the front end of the needle middle section 32; the rear end of the needle middle section 32 is connected to the front end of the needle rear section 33; the needle... The rear end of the rear section 33 protrudes from the base 1; the axis of the rear guide tube 23 is parallel to the axis of the front guide tube 21, and the angle between the axis of the middle guide tube 22 and the axes of the rear guide tube 23 and the front guide tube 21 is greater than 90°; the axis of the front section 31 of the needle always coincides with the axis of the front guide tube 21, the axis of the rear section 33 of the needle always coincides with the axis of the rear guide tube 23, and the axis of the middle section 32 of the needle always parallel to the axis of the middle guide tube 22; a limiting spring 313 is provided at the front end of the needle 3, which is used to temporarily limit the placement tube 6 on the needle and abut against the front end holding part 211. Through the above unique instrument structure, especially the cooperation structure of the guide tube and the puncture needle, not only can puncture and tube placement be completed in one go with the assistance of the endoscope, but also the cooperation structure of the continuous identical bends of the guide tube and the puncture needle can keep the hand area away from the ear canal, providing the operator with sufficient field of vision and improving the convenience of operation.
[0029] When in use, medical staff hold the device and aim the puncture needle at the tympanic membrane puncture site. After the puncture is in place, the catheter is placed in the tympanic membrane puncture opening. Then the puncture needle is pulled out and released to complete the catheter placement and drainage operation. The whole process is completed in one go without the need for an additional second puncture step.
[0030] Furthermore, the outer wall of the needle tip 31 is always in contact with the inner wall of the guide tube 21, or a limiting guide is provided between the outer wall of the needle tip 31 and the inner wall of the guide tube 21, so that the axis of the needle tip 31 always coincides with the axis of the guide tube 21. This further improves the accuracy of needle puncture.
[0031] Furthermore, the front end of the needle 3 is provided with a receiving groove 312, and a limiting spring 313 is installed in the receiving groove 312. In its natural state, the highest point of the limiting spring 313 protrudes from the receiving groove 312. It should also be noted that the catheter used in this device is fitted to the inner wall of the catheter through the limiting spring. During the puncture of the needle, the catheter and the needle are pressured by an elastic pad, ensuring a reliable connection between the two and preventing the catheter from detaching from the needle. When the needle is retracted, the catheter is disengaged from the needle by the action of the front end holding part. The ingenious structural design makes the catheter placement process easy to operate and improves surgical efficiency.
[0032] It should be noted that the interior of the front guide tube 21 is a front guide cavity 212, which extends through the entire front guide tube 21 in the front-rear direction. The front section 31 of the needle moves within the front guide cavity 212. The rear guide tube 23 is provided with a rear guide cavity 231, which extends through the entire rear guide tube 23 in the front-rear direction. Simultaneously, the rear guide cavity 231 extends radially towards the front guide tube 23, extending through the rear guide tube 23. The rear section 33 of the needle moves within the rear guide cavity 231, and the rear end of the middle section 32 of the needle moves along with the rear section 33 within the rear guide cavity 231. This structural design further ensures the relative position and relative movement of the guide tube and the puncture needle, providing the user with sufficient visibility and improving operational convenience.
[0033] Furthermore, the rear end of the needle's rear section 33 extends through the base body 11 of the base 1, and the rear end of the needle's rear section 33 is connected to a push-pull plate 34. A return spring 4 is provided between the push-pull plate 34 and the base body 11. A gripping plate 12 is arranged around the outer periphery of the base body 11. The needle head 311 of the needle 3 extends out of the front guide tube 21, and a clamping limiting plate 5 is used to limit the distance between the middle guide tube 22 and the middle section 32 of the needle. This structure further ensures the convenience and stability of operation.
[0034] The unblocking method using this device includes the following steps: S1: Hold the grip plate 12 of the base 1 with one hand and press the push-pull plate 34 of the needle 3 so that the needle head 311 of the needle 3 extends out of the front guide tube 21; preferably, the needle 3 is an tympanic membrane puncture needle. S2: Use the clamping and limiting piece 5 to clamp the middle section guide tube 22 and the middle section of the needle 32, so that the distance between the middle section guide tube 22 and the middle section of the needle 32 is determined; S3: The placement tube 6 is fitted onto the limiting spring 313 and abuts against the front end holding part 211; preferably, the placement tube 6 is a miniature placement tube used to improve middle ear ventilation and drainage.
[0035] S4: Use the needle tip 311 to puncture the first medium layer; in this embodiment, the first medium layer is the tympanic membrane; S5: When the needle head 311 pierces the first medium layer and moves forward a certain distance, the tube 6 is placed and held in the first medium layer; S6: Keep the base 1 and guide tube 2 stationary, remove the clamping limit piece 5, the needle 3 is reset and retracted, the placement tube 6 is separated from the limit spring 313 and is simultaneously abutted by the stationary front end holding part 211, and the placement tube 6 is left on the first medium layer.
[0036] Finally, the instrument was removed for subsequent procedures.
[0037] This device allows for simultaneous puncture and catheter placement without the need for secondary procedures, significantly shortening treatment time, reducing patient suffering from multiple punctures, and lowering the risk of ear canal and tympanic membrane infections caused by secondary punctures, thus improving treatment safety.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A dredging device, characterized in that, include: The base (1) is fixedly connected to the rear end of the rear guide tube (23) of the guide tube (2) at its front end. The front end of the rear guide tube (23) is connected to the rear end of the middle guide tube (22). The front end of the middle guide tube (22) is connected to the rear end of the front guide tube (21). The front end of the front guide tube (21) is provided with a front end holding part (211). The guide tube (2) is provided with a needle (3) inside. The front end of the needle front section (31) of the needle (3) is provided with a needle head (311). The rear end of the needle front section (31) is connected to the front end of the needle middle section (32). The rear end of the needle middle section (32) is connected to the front end of the needle rear section (33). The rear end of the needle rear section (33) extends out of the base (1). The axis of the rear guide tube (23) is parallel to the axis of the front guide tube (21), and the angle between the axis of the middle guide tube (22) and the axis of the rear guide tube (23) and the axis of the front guide tube (21) is greater than 90°; the axis of the front section (31) of the needle always coincides with the axis of the front guide tube (21), the axis of the rear section (33) of the needle always coincides with the axis of the rear guide tube (23), and the axis of the middle section (32) of the needle always parallel to the axis of the middle guide tube (22); The front end of the needle (3) is provided with a limiting spring (313), which is used to temporarily limit the placement tube (6) on the needle and abut against the front end stop (211).
2. The unblocking device as described in claim 1, characterized in that, The outer wall of the front section (31) of the needle is always in contact with the inner wall of the front guide tube (21), or a limiting guide is provided between the outer wall of the front section (31) of the needle and the inner wall of the front guide tube (21) so that the axis of the front section (31) of the needle always coincides with the axis of the front guide tube (21).
3. The unblocking device as described in claim 2, characterized in that, The front end of the needle (3) is provided with a receiving groove (312), and the limiting spring (313) is installed in the receiving groove (312). In the natural state, the highest point of the limiting spring (313) protrudes out of the receiving groove (312).
4. The unblocking device as described in claim 2, characterized in that, The interior of the front guide tube (21) is the front guide cavity (212), which runs through the entire front guide tube (21) in the front-back direction. The front section (31) of the needle moves in the front guide cavity (212).
5. The unblocking device as described in claim 2, characterized in that, The rear guide tube (23) is provided with a rear guide cavity (231). The rear guide cavity (231) extends through the entire rear guide tube (23) in the front-back direction. At the same time, the rear guide cavity (231) extends through the rear guide tube (23) radially toward the front guide tube (21). The rear section (33) of the needle moves in the rear guide cavity (231). The rear end of the middle section (32) of the needle moves with the rear section (33) of the needle in the rear guide cavity (231).
6. The unblocking device as described in claim 2, characterized in that, The rear end of the needle (33) extends out of the base body (11) of the base (1), and the rear end of the needle (33) is connected to the push-pull plate (34). The push-pull plate (34) and the base body (11) are provided with a return spring (4).
7. The unblocking device as described in claim 6, characterized in that, A grip plate (12) is provided around the outer periphery of the base body (11).
8. The unblocking device as described in claim 6, characterized in that, The needle head (311) of the needle (3) extends out of the front guide tube (21), and the clamping limit piece (5) is used to limit the distance between the middle guide tube (22) and the middle section (32) of the needle.
9. A method for unblocking blockages, using the unblocking device as described in any one of claims 1-8, characterized in that, Includes the following steps: S1: Hold the grip plate (12) of the base (1) with one hand and press the push-pull plate (34) of the needle (3) so that the needle head (311) of the needle (3) extends out of the front guide tube (21). S2: Use the clamping limiting piece (5) to clamp the middle section guide tube (22) and the middle section of the needle (32) to determine the distance between the middle section guide tube (22) and the middle section of the needle (32); S3: Place the placement tube (6) on the limiting spring (313) and abut against the front end holding part (211). S4: Use the needle tip (311) to puncture the first medium layer; S5: When the needle head (311) pierces the first medium layer and moves forward a certain distance, the placement tube (6) is held in the first medium layer; S6: Keep the base (1) and the guide tube (2) stationary, remove the clamping limiting piece (5), the needle (3) is reset and retracted, the placement tube (6) is separated from the limiting spring (313) and is simultaneously abutted by the stationary front end holding part (211), and the placement tube (6) remains on the first medium layer.