Coaxial precise catheter puncture assist device

Abstract

The utility model relates to the field of medical instruments, and discloses a coaxial precise catheter puncture assist device. The coaxial precise catheter puncture assist device comprises a connecting plate which can deform under stress and has a flattened state and a folded state; the first sheathing canal is arranged at one end of the connecting plate; the second sheathing canal is arranged at the other end of the connecting plate, and when the connecting plate is in a folded state, the second sheathing canal and the first sheathing canal are buckled to form a closed catheter sheath structure; the first blade is arranged at the bottom end of the first sheath tube; and the second blade is arranged at the bottom end of the second sheath tube. By means of the combined design of the wing-shaped blade and the coaxial catheter small sheath, the cutting process is more accurate and concentrated, unnecessary damage to surrounding tissue is avoided, pain in an operation is reduced, and the drainage tube introducing efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and more specifically, to a coaxial precision catheter puncture aid. Background Art

[0002] Percutaneous transbiliary drainage (PTCD) is a technique that involves percutaneously piercing the liver through a guidewire and then introducing a drainage tube for diagnosis and treatment. Generally speaking, once it is clear that the guidewire is in the bile duct, the PTCD three-piece set will be introduced first to pre-expand the duct. Since the diameter of the drainage tube is relatively thick, when the drainage tube passes through the guidewire into the skin and into the body, the difference between the puncture diameter and the outer diameter of the drainage tube makes it difficult for the drainage tube to pass through the puncture port, and the patient will experience severe pain due to skin traction. Therefore, the operator often uses a blade to make cuts near the puncture port to expand the puncture port in advance.

[0003] However, since it is impossible to accurately position and operate the blade to cut the puncture site, the operator may sometimes cut a site that is far away from the puncture site, causing unnecessary damage. Utility Model Content

[0004] The present invention aims to provide a coaxial precision catheter puncture assistant to achieve accurate cutting and expansion of the puncture site, reduce tissue damage, and improve the efficiency and safety of PTCD drainage surgery.

[0005] The present application provides a coaxial precision catheter puncture assisting device, comprising:

[0006] The connecting plate can be deformed by force and has two states: flattened and folded;

[0007] A first sheath tube is arranged at one end of the connecting plate;

[0008] A second sheath tube is arranged at the other end of the connecting plate, and when the connecting plate is in a folded state, the second sheath tube is buckled with the first sheath tube to form a closed catheter sheath structure;

[0009] A first blade is disposed at the bottom end of the first sheath tube; and

[0010] The second blade is arranged at the bottom end of the second sheath tube.

[0011] In a preferred embodiment, both the first sheath tube and the second sheath tube are semicircular tube wall structures, and the catheter sheath structure formed by closing the first sheath tube and the second sheath tube is a circular tubular structure.

[0012] In a feasible implementation, the first sheath tube and the second sheath tube may also be other non-semicircular arc-shaped tube wall structures, as long as the catheter sheath structure formed by the two being closed is a circular tubular structure.

[0013] In a feasible implementation, the first sheath tube and the second sheath tube may also be other non-arc-shaped tube wall structures, and the catheter sheath structure formed by the closing of the two can achieve the purpose of guiding the guide wire to pass through.

[0014] In a feasible implementation manner, a buckling structure may be further provided at the buckling position of the first sheath tube and the second sheath tube to prevent misalignment after buckling.

[0015] In a feasible implementation manner, the connecting plate may also be provided with finger grooves for facilitating finger pinching.

[0016] In a feasible implementation manner, a folding mark is provided in the middle of the connecting plate.

[0017] The utility model provides a combined design of a wing-shaped blade and a small coaxial catheter sheath, so that the cutting process is more precise and focused, unnecessary damage to surrounding tissues is avoided, pain during surgery is reduced, and the efficiency of drainage tube introduction is improved.

[0018] In summary, this application has the following beneficial effects:

[0019] 1. Compact design, easy to operate, and easy to deploy quickly during surgery.

[0020] 2. High-precision positioning capability significantly reduces accidental injuries and unnecessary tissue damage.

[0021] 3. Improve surgical safety and success rate by precisely controlling cutting depth and position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of the coaxial precision catheter puncture aid in the embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a flattened state of the coaxial precision catheter puncture aid in an embodiment of the present application;

[0024] Figure 3 is a schematic diagram of the folded state of the coaxial precision catheter puncture aid in an embodiment of the present application;

[0025] Figure 4 It is a top view of the folded state of the coaxial precision catheter puncture aid in the embodiment of the present application.

[0026] Figure numerals: 1, connecting plate; 2, first sheath tube; 3, second sheath tube; 4, first blade; 5, second blade. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. In the description of the utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] Example

[0029] The present application discloses a coaxial precision catheter puncture aid, referring to Figure 1 The coaxial precision catheter puncture aid comprises a connecting plate 1 and a first sheath tube 2 and a second sheath tube 3 respectively arranged at both ends of the connecting plate 1, and a first blade 4 and a second blade 5 are respectively arranged at the bottom ends of the first sheath tube 2 and the second sheath tube 3. In a feasible embodiment, the connecting plate 1 is a rectangular thin sheet structure, which can be deformed by receiving, and has two states: flattened and folded. The flattened state refers to the state in which the connecting plate 1 is a rectangular thin sheet in the natural state without deformation; the folded state refers to the state in which the connecting plate 1 is folded under force, so that the first sheath tube 2 and the second sheath tube 3 at the end are buckled and closed to form a catheter sheath structure, that is, a completely folded state.

[0030] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the first sheath tube 2 and the second sheath tube 3 are both semicircular tube wall structures, and the catheter sheath structure formed by the first sheath tube 2 and the second sheath tube 3 closing is a circular tubular structure. In other embodiments, the first sheath tube 2 and the second sheath tube 3 can also be other non-semicircular arc tube wall structures, as long as the catheter sheath structure formed by the closing of the two is a circular tubular structure; or the first sheath tube 2 and the second sheath tube 3 can also be other non-circular arc tube wall structures, and the catheter sheath structure formed by the closing of the two can achieve the passage of the guide wire.

[0031] In a feasible implementation manner, in order to facilitate folding, a folding mark may be preset in the middle of the connecting plate 1 .

[0032] In a feasible implementation manner, the connecting plate 1 may also be provided with finger grooves for easy finger pinching.

[0033] In a feasible implementation manner, a buckling structure may be further provided at the buckling position of the first sheath tube 2 and the second sheath tube 3 to prevent misalignment after buckling.

[0034] The implementation process of the coaxial precision catheter puncture aid of the present application is as follows: after the guide wire is successfully introduced into the body, the operator pinches the connecting plate 1 to close the first sheath tube 2 and the second sheath tube 3 and form a catheter sheath structure that fits the guide wire (the connecting plate 1 is in a folded state). Push the catheter puncture aid with a blade along the guide wire to the skin puncture port, and gently apply force for precise cutting. After the cutting is completed, withdraw the blade and release the connecting plate 1, so that the catheter puncture aid returns to its natural open state (the connecting plate 1 is in a flattened state).

[0035] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A coaxial precision catheter puncture aid, characterized in that: include: The connecting plate (1) can be deformed by force and has two states: flattened and folded; A first sheath tube (2) is arranged at one end of the connecting plate (1); A second sheath tube (3) is arranged at the other end of the connecting plate (1), and when the connecting plate (1) is in a folded state, the second sheath tube (3) is buckled with the first sheath tube (2) to form a closed catheter sheath structure; A first blade (4) is arranged at the bottom end of the first sheath tube (2); as well as The second blade (5) is arranged at the bottom end of the second sheath tube (3).

2. The coaxial precision catheter puncture aid according to claim 1, characterized in that: The first sheath tube (2) and the second sheath tube (3) are both semicircular tube wall structures, and the catheter sheath structure formed by closing the first sheath tube (2) and the second sheath tube (3) is a circular tubular structure.

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