Skin expanding needle for central venous catheter catheterization
By designing a skin dilator needle for central venous catheter placement and using an indicator needle and scale line to ensure the consistency of incision size and depth, the problem of inaccurate skin dilator operation is solved, and the operation safety and success rate are improved.
Patent Information
- Application Number
- CN202422396673.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-30
AI Technical Summary
During the current central venous catheter placement process, it is difficult to precisely control the cutting direction, depth, and size of the incision using a skin expander, resulting in inconsistent skin wounds and potentially causing complications such as secondary skin expansion, tissue damage, and knife cuts.
A skin dilator for central venous catheter placement was designed, which includes a base, a skin dilator, an indicator needle and a scale line. It enters the skin through a guide wire and uses a trapezoidal blade to form a fixed incision. The indicator needle and scale line are combined to ensure the consistency of the incision size and depth.
It achieves precise control of the skin expansion process, reduces the pain of secondary skin expansion and the risk of adverse events, and improves the safety and success rate of the operation.
Smart Images
Figure CN223438607U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical equipment technical field especially involves the skin expander needle for central venous catheterization. BACKGROUND
[0002] At present: the central venous catheter or medium length catheter of peripheral vascular puncture or peripheral puncture is placed into the clinical use, and the Seldinger technique under the B ultrasonic guidance is adopted, in order to make the Seldinger blood vessel support device be sent into the blood vessel smoothly, and the skin expander technology is particularly important. The skin expander knife is used for central venous catheter, such as CVC, PICC, medium length catheter etc., in the puncture process, after the guide wire is placed, before the blood vessel sheath is placed, the skin is expanded, the puncture space suitable for the size of the blood vessel sheath pipe diameter is formed, and it is beneficial to subsequent placement.
[0003] At present, the skin expander knife matched in the central venous catheterization bag is mostly small blade with sharp edge on one side, similar to scalpel, when using, the operator cuts a longitudinal incision along the guide wire outlet (the knife tip is reversed). Although the blade is sharp, simple to use and easy to operate, but in actual operation, it is limited by the experience, technology and strength of the operator, cannot accurately control the cutting direction, depth and incision size, is easy to cause that the skin wound is too small, the blood vessel sheath cannot be placed smoothly, needs secondary skin expansion, or the skin wound is too large, the tissue damage is large, bleeding and other complications, and there is the risk of adverse events such as knife cutting injury in operation. SUMMARY
[0004] The utility model discloses a kind of skin expander needles for central venous catheterization to solve the shortcomings in prior art,
[0005] To achieve the above object, the utility model adopts the following technical scheme: a kind of skin expander needle for central venous catheterization, including base, skin expander needle, the base includes cylindrical through-hole, fixed disc, indicating needle;The base center is equipped with the cylindrical through-hole, the base bottom end is equipped with fixed disc, the base upper surface is equipped with the indicating needle, the indicating needle is perpendicular to the cylindrical through-hole;The skin expander needle includes needle tip mouth, needle head, trapezoidal blade, holding butterfly wing, and the skin expander needle lower end is integrally connected with needle head;The skin expander needle is cylindrical structure, the needle head is conical structure, the skin expander needle is hollow structure;The skin expander needle upper portion is equipped with a holding butterfly wing, and the needle head includes needle tip mouth and trapezoidal blade.
[0006] Preferably, the skin expander needle middle part is equipped with scale line, the precision of the scale line is mm, and the total length is 1-3cm.
[0007] Preferably, the needle head outside is equipped with a trapezoidal blade, and the trapezoidal blade is sharpened on one side close to needle tip mouth.
[0008] Preferably, the diameter of the needle tip mouth is equal to the diameter of the guide wire.
[0009] Preferably, the inner diameter of the cylindrical through hole is the same as the outer diameter of the skin expander needle.
[0010] Preferably, the height of the base is equal to the distance from the needle tip opening to the starting point of the scale line.
[0011] Preferably, the fixing disc is a suction disc structure.
[0012] Preferably, the base is made of transparent material
[0013] Compared with the prior art, the skin expander needle of the utility model has the beneficial effects that: the skin expander needle is needle-shaped, and directly enters the skin through a guide wire, thereby reducing the inaccurate control of the needle insertion position and the inconsistency of the angle when a traditional blade is used to expand the skin. Meanwhile, the skin expander needle can form a fixed-depth and fixed-size incision at one time, thereby avoiding the different incision sizes caused by different expansion forces and angles of different operators when a traditional skin expander is used, ensuring one-time sheath sending success, reducing the pain of the patient caused by secondary skin expansion, and reducing the risk of possible knife cuts and other adverse events. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a connection structure schematic view of the skin expander needle and the base for central venous catheter catheterization of the utility model;
[0015] Figure 2 It is a skin expander needle structure schematic view for central venous catheter catheterization of the utility model;
[0016] Figure 3 It is a base structure schematic view of the skin expander needle for central venous catheter catheterization of the utility model.
[0017] Label explanation: 1-skin expander needle, 101-holding butterfly wing, 102-scale line, 103-trapezoidal blade, 104-needle, 105-needle tip opening, 2-base, 201-indicator needle, 202-cylindrical through hole, 203-fixing disc. DETAILED DESCRIPTION
[0018] In order to further understand the purpose, structure, characteristics and functions of the utility model, the following detailed description is made in conjunction with the embodiments.
[0019] Please refer to Figure 1 The skin expander needle for central venous catheter catheterization of an embodiment of the utility model comprises a base 2 and a skin expander needle 1.
[0020] As Figure 3As shown in the figure, the base includes a cylindrical through hole 202, a fixed disc 203, and an indicating needle 201; the base 2 is centrally provided with the cylindrical through hole 202, the bottom end of the base 2 is provided with the fixed disc 203, and the upper surface of the base 2 is provided with the indicating needle 201, which is perpendicular to the cylindrical through hole 202.
[0021] As shown in the figure, the base includes a cylindrical through hole 202, a fixed disc 203, and an indicating needle 201; the base 2 is centrally provided with the cylindrical through hole 202, the bottom end of the base 2 is provided with the fixed disc 203, and the upper surface of the base 2 is provided with the indicating needle 201, which is perpendicular to the cylindrical through hole 202. Figure 2 As shown in the figure, the base includes a cylindrical through hole 202, a fixed disc 203, and an indicating needle 201; the base 2 is centrally provided with the cylindrical through hole 202, the bottom end of the base 2 is provided with the fixed disc 203, and the upper surface of the base 2 is provided with the indicating needle 201, which is perpendicular to the cylindrical through hole 202.
[0022] Preferably, the expansion needle 1 is provided with a scale line 102 in the middle, and the precision of the scale line 102 is mm, and the total length is 1-3 cm.
[0023] Preferably, the needle head 104 is provided with a trapezoidal blade 103 on the outside, and the trapezoidal blade 103 is sharpened on one side close to the needle tip opening 105.
[0024] Preferably, the diameter of the needle tip opening 105 is equal to the diameter of the wire.
[0025] Preferably, the inner diameter of the cylindrical through hole 202 is the same as the outer diameter of the expansion needle 1. Such design ensures that the expansion needle can only move in the up-down direction when combined with the base, avoiding the expansion size increasing due to hand shaking, and affecting the subsequent placement of the vascular sheath.
[0026] Preferably, the height of the base 2 is equal to the distance from the needle tip opening 105 to the starting point of the scale line 102. Such design ensures that the indicating needle 201 indicates the starting position of the scale line 102 when the operator performs the expansion operation, which is convenient for the operator to calculate the expansion depth.
[0027] Preferably, the fixed disc 203 is a suction disc structure. Such design can fix the fixed disc on the patient's skin.
[0028] Preferably, the base 2 is made of transparent material. Such design is convenient for the operator to observe the state of the expansion needle 1 in time.
[0029] In use, the central venous catheter skin-expanding needle in the original state is taken out, the operator passes the skin-expanding needle through the cylindrical through hole 202 in the base, and then the needle tip 105 is inserted into the guide wire, so that the problems of inaccurate control of the needle insertion site and inconsistent angle during skin expansion are solved, and the needle insertion site is positioned; at this time, the patient's skin is tightened, the fixing disc is fixed at the patient's skin, the blade edge of the trapezoidal blade 103 is perpendicular to the patient's skin, the operator observes the position of the indicating needle 201 pointing to the scale line 102, marks the position X1, then holds the holding butterfly wing 101, and the skin-expanding needle 1 is operated to enter the skin and then adhere to the guide wire to expand the skin downward, the needle 105 is inserted into the skin until the needle 105 is fully inserted into the skin, the size of the skin expansion is consistent with the size of the blood vessel sheath, at this time, the depth of the skin expansion is determined by the numerical value of the scale line 102 and X1, the operator is facilitated to ensure the size of the skin expansion, to ensure the success of the one-time sheath sending, to reduce the pain of the patient caused by the secondary skin expansion, and to reduce the risk of adverse events such as knife cuts. Finally, the skin-expanding needle is withdrawn, and hemostasis is performed.
[0030] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A skin dilation needle for central venous catheter placement, comprising a base (2) and a skin dilation needle (1), characterized in that: The base comprises a cylindrical through hole (202), a fixing plate (203), and an indicator needle (201); the cylindrical through hole (202) is provided in the center of the base (2), the fixing plate (203) is provided at the bottom end of the base (2), and the indicator needle (201) is provided on the upper surface of the base (2), and the indicator needle (201) is perpendicular to the cylindrical through hole (202); the skin expansion needle comprises a needle tip (105), a needle head ( 104), a trapezoidal blade (103), a holding butterfly wing (101), the lower end of the skin expansion needle (1) is integrally connected with a needle head (104); the skin expansion needle (1) is a cylindrical structure, the needle head (104) is a conical structure, and the skin expansion needle (1) is a hollow structure; a holding butterfly wing (101) is provided on the upper part of the skin expansion needle (1), and the needle head (104) includes a needle tip (105) and a trapezoidal blade (103).
2. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: A scale line (102) is provided in the middle of the skin expansion needle (1), the precision of the scale line (102) is mm, and the total length is 1-3 cm.
3. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: A trapezoidal blade (103) is provided on the outer side of the needle head (104); the trapezoidal blade (103) is sharpened on one side close to the needle tip (105).
4. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: The diameter of the needle tip opening (105) is equal to the diameter of the guide wire.
5. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: The inner diameter of the cylindrical through hole (202) is the same as the outer diameter of the skin expansion needle (1).
6. A skin dilation needle for central venous catheter placement according to claim 2, characterized in that: The height of the base (2) is equal to the distance from the needle tip opening (105) to the starting point of the scale line (102).
7. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: The fixed disk (203) is a suction cup structure.
8. A skin dilation needle for central venous catheter placement according to claim 1, characterized in that: The base (2) is made of transparent material.