An indwelling needle

Abstract

The present invention provides an indwelling needle, comprising a catheter seat (1), a clamping hose (2) and a connector (3), wherein the clamping hose (2) is a silicone clamping hose, the catheter seat (1) and the clamping hose (2) and the clamping hose (2) and the connector (3) are connected by interference fit, the catheter seat (1) and the connector (3) have a connecting portion with a diameter greater than the inner diameter of the clamping hose (2), the connecting portion is a first convex portion (11) and a second convex portion (31), the clamping hose (2) is sleeved on the catheter seat (1) and the connector (3), the connector (3) has a decompression sleeve passing through the external part of the clamping hose (2), the external part is docked with the needle core handle in the catheter seat (1), and the outer side of the indwelling needle is covered with a sheath. The material of the clamping hose has good blood compatibility with the human body and improves production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an indwelling needle. Background Art

[0002] The intravenous indwelling needle is also called the intravenous cannula needle. It consists of a stainless steel needle core, a soft outer cannula and a plastic needle seat. During puncture, the outer cannula and the needle core are inserted into the blood vessel at the same time. After the cannula is sent into the blood vessel, the needle core is withdrawn, and only the soft outer cannula is left in the blood vessel for infusion or other operations. The indwelling needle is easy to operate, which reduces the pain caused by repeated punctures for patients, protects blood vessels, reduces fluid extravasation, and ensures reasonable medication time. It provides convenience for blood transfusion and infusion, retains an open venous channel, facilitates rescue work, and greatly reduces the workload of nursing staff. It is suitable for patients with long-term infusion, elderly patients, and patients without autonomous consciousness, especially critically ill patients.

[0003] The core components of the indwelling needle include a soft catheter that can be left in the blood vessel, and a stainless steel puncture guide needle core. When in use, the catheter and the needle core are punctured into the blood vessel together. When the catheter is completely in the blood vessel, the needle core is withdrawn, and only the soft catheter is left in the blood vessel for infusion or hemodialysis treatment. It is convenient for clinical medication, emergency medication for acute and critical patients, reduces the workload of nurses, and reduces the pain of children. Therefore, indwelling needles are widely used in clinical practice. Silicone has special physiological functions and can be "intimate" with the human body. The human body does not reject it. After a certain period of time, it will be completely combined with human tissues and has extremely good stability. Silicone is a particularly important type of medical polymer material. It has excellent physiological inertness, is non-toxic, odorless, non-corrosive, anti-coagulation, has good compatibility with the body, and can withstand harsh disinfection conditions. It can be processed into pipes, sheets, films and special-shaped components as needed, and can be used as medical devices, artificial organs, etc.

[0004] Through the understanding and analysis of existing products, most of the indwelling needles on the market have the following shortcomings: the clamping hose is mostly made of non-silicone and has poor compatibility with human blood; even if the clamping hose is made of silicone, the structure is mostly bonded with glue, which is cumbersome and reduces production efficiency. In addition, the catheter is prone to damage. If it cannot be repaired in time and effectively, it will eventually lead to the inability to maintain the infusion and the need for extubation. Summary of the invention

[0005] In order to overcome the above problems existing in the prior art, the present invention provides an indwelling needle, which reduces the impact of the indwelling needle on the patient and improves production efficiency.

[0006] The object of the present invention is to provide an indwelling needle, comprising a catheter seat (1), a clamping hose (2) and a connector (3), wherein the clamping hose (2) is a silicone clamping hose, the catheter seat (1) is connected to the clamping hose (2), and the clamping hose (2) is connected to the connector (3); the catheter seat (1) and the clamping hose (2) and the clamping hose (2) and the connector (3) are connected by interference fit.

[0007] Preferably, the catheter seat (1) and the connector (3) have a connecting portion with a diameter greater than the inner diameter of the clamping hose (2).

[0008] Preferably, the connecting portion is a first convex portion (11) and a second convex portion (31).

[0009] Preferably, the clamping hose (2) is elastic and sleeved on the catheter seat (1) and the connector (3).

[0010] Preferably, grooves are respectively provided at positions in the silicone tube corresponding to the connecting parts of the catheter seat (1) and the connector (3), and the connecting parts are stuck in the grooves.

[0011] Preferably, the outer side of the indwelling needle is covered with a sheath.

[0012] The beneficial effects of the present invention are:

[0013] 1. The material of the clamping hose is silicone, which has good compatibility with human blood;

[0014] 2. The structure of the catheter seat and connector has been optimized. The high elasticity of silicone rubber allows the silicone tube, catheter seat and connector to be connected through interference fit. The clamping hose, catheter seat and connector are connected through interference fit, which eliminates the tedious process of dispensing and improves production efficiency.

[0015] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. The objects and features of the present invention will become more apparent in view of the following description in conjunction with the accompanying drawings, in which:

[0017] Attached Figure 1 A general structural view of an indwelling needle according to an embodiment of the present invention;

[0018] Attached Figure 2 is a side view of a catheter adapter according to an embodiment of the present invention;

[0019] Attached Figure 3 FIG. 4 is a side view of a connector according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the protection scope of the present invention.

[0021] See also Figure 1-3 The indwelling needle of the present invention may include a catheter seat 1, a clamping hose 2 and a connector 3, wherein the clamping hose 2 is a silicone clamping hose, the catheter seat 1 is connected to the clamping hose 2, and the clamping hose 2 is connected to the connector 3. The catheter seat 1 and the clamping hose 2, as well as the clamping hose 2 and the connector 3 are connected by interference fit.

[0022] Referring to the accompanying drawings, the catheter seat 1 and the connector 3 have a connection portion whose diameter is larger than the inner diameter of the clamping hose 2. In this embodiment, the connection portion is a first convex portion 11 and a second convex portion 31. The clamping hose 2 has strong elasticity and is sleeved on the catheter seat 1 and the connector 3. Since the diameters of the first convex portion 11 and the second convex portion 31 are larger than the inner diameter of the silicone hose, the silicone clamping hose 2 and the catheter seat 1 and the connector 3 can be connected by interference fit. In addition, two grooves (not shown) can be set at positions corresponding to the first convex portion 11 and the second convex portion 31 in the silicone tube, and the first convex portion 11 and the second convex portion 31 of the catheter seat and the front end of the connector are just stuck in the grooves, which can further prevent slipping.

[0023] By optimizing the structure of the catheter seat 1 and the connector 3, for example, the catheter seat 1 and the connector 3 have a special structure, and the clamping hose 2 has strong elasticity, the silicone clamping hose 2 and the catheter seat 1 and the connector 3 can be connected by interference fit without glue bonding, thereby improving production efficiency.

[0024] During use, hold the needle seat with the blade of the inner needle tube assembly facing upward, aim at the blood vessel and puncture the skin with the needle; check that blood returns to the needle seat, and further insert the catheter into the blood vessel about 1 cm. Hold the rubber connector with one hand and the needle seat with the other hand to remove the inner needle tube assembly and the exhaust connector from the outer catheter assembly; tightly clamp the clamping hose with non-serrated pliers and remove the rubber connector from the connector; carefully loosen the clamp at the clamping hose to release the air in the outer catheter assembly; safely connect the blood circuit to the connector; secure the outer catheter assembly and the blood circuit tube with a dressing or equivalent.

[0025] The indwelling needle of this embodiment:

[0026] 1. The material of the clamping hose is silicone, which has good compatibility with human blood;

[0027] 2. The structure of the catheter seat and connector has been optimized. The high elasticity of silicone rubber allows the silicone tube, catheter seat and connector to be connected through interference fit. The clamping hose, catheter seat and connector are connected through interference fit, which eliminates the tedious process of dispensing and improves production efficiency.

[0028] The technical solutions provided by the embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, those skilled in the art may make changes in the specific implementation methods and application scopes according to the embodiments of the present invention. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. An indwelling needle, characterized in that: The invention comprises a catheter seat (1), a clamping hose (2) and a connector (3); the clamping hose (2) is a silicone clamping hose; the catheter seat (1) is connected to the clamping hose (2), and the clamping hose (2) is connected to the connector (3); the catheter seat (1) and the clamping hose (2) as well as the clamping hose (2) and the connector (3) are connected by interference fit.

2. The indwelling needle according to claim 1, characterized in that: The catheter seat (1) and the connector (3) have a connection portion with a diameter greater than the inner diameter of the clamping hose (2).

3. The indwelling needle according to claim 2, characterized in that: The connecting portion is a first convex portion (11) and a second convex portion (31).

4. The indwelling needle according to claim 1, characterized in that: The clamping hose (2) is elastic and sleeved on the catheter seat (1) and the connector (3).

5. The indwelling needle according to claim 2, characterized in that: Grooves are respectively arranged at positions in the clamping hose corresponding to the connecting parts of the catheter seat (1) and the connector (3), and the connecting parts are clamped in the grooves.

6. The indwelling needle according to claim 1, characterized in that: The outer side of the indwelling needle is covered with a sheath.

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