WO2023142737A1

WO2023142737A1 - Waterproof indwelling needle system and method for using same

Info

Publication number: WO2023142737A1
Application number: PCT/CN2022/138865
Authority: WO
Inventors: 陈宁宁; 周贵; 宋哲
Original assignee: 微泰医疗器械(杭州)股份有限公司
Priority date: 2022-01-26
Filing date: 2022-12-14
Publication date: 2023-08-03
Also published as: CN116531607A

Abstract

A waterproof indwelling needle system and a method for using the same. The waterproof indwelling needle system comprises a bottom plate (110) and an indwelling needle (120), wherein the bottom plate (110) comprises: a bottom plate through hole (111) and a support ring plate (112) located at the bottom of the bottom plate through hole (111); the indwelling needle (120) comprises: an indwelling housing (121) and a needle body (122), wherein an inner cavity of the indwelling housing (121) is provided with an accommodating slot (121.2), and a sealing gasket (121.3) is provided in the accommodating slot (121.2); the top of the needle body (122) is located within the indwelling housing (121), and the bottom of the needle body (122) penetrates through the indwelling housing (121) and the bottom plate through hole (111); the lower portion of the indwelling housing (121) is provided with an interference convex ring (121.4) capable of forming an interference fit with the support ring plate (112), or a sealing ring (130) is provided between the indwelling housing (121) and the support ring plate (112). According to the waterproof indwelling needle system and the method for using the same provided in the present invention, the comprehensive waterproofness is good, and the mounting structure in the prior art is omitted. The waterproof indwelling needle system has the advantages of simple structure, low manufacturing cost, and convenient use.

Description

Waterproof catheter system and method of use

technical field

The invention relates to the technical field of indwelling needles, in particular to a waterproof indwelling needle system and its application method.

Background technique

At present, most of the indwelling needles used clinically are used for insulin injection of diabetic patients. Since the patient needs to inject medicine for a long time, the indwelling needle and the base plate that fixes the indwelling needle on the patient's body need to be applied to the patient for a long time. The indwelling needle needs to have good waterproof performance, so as to prevent water from contacting the patient's wound during use, thereby reducing the risk of wound infection.

For the existing hypodermic indwelling needle, please refer to CN112516411A for a subcutaneous indwelling needle with good sealing performance. The hypodermic indwelling needle is shown in Figure 1 and Figure 2, and mainly includes 1 base plate, 2 positioning plate, 3 plastic shell, 4 receiving groove, 5 sealing gasket, 6 wedge-shaped part, 7 indwelling hose, 9 fixing tube, 10 limit Plate, 11 pull rods, 12 springs, 13 limit rods, 14 pull plates, 15 guide blocks. The gap between the indwelling needle and the base plate in the prior art is not waterproof, which may cause wound infection at the pinhole of the indwelling needle, and the installation between the indwelling needle and the support plate is inconvenient, which affects user experience.

Contents of the invention

In view of this, the present invention provides a waterproof indwelling needle system with good waterproof property and easy installation and its use method.

The first aspect of the present invention proposes a waterproof indwelling needle system, including a base plate and an indwelling needle, wherein: the base plate includes: a through hole in the base plate and a support ring plate at the bottom of the through hole in the base plate; the indwelling needle includes: an indwelling shell Body and needle body, wherein, the inner cavity of the indwelling housing is provided with a receiving groove, and a sealing gasket is arranged in the accommodating groove; the top of the needle body is located in the indwelling housing, and the The bottom runs through the indwelling housing and the through hole of the bottom plate; the lower part of the indwelling housing has an interference flange capable of forming an interference fit with the support ring plate, or, the indwelling housing and the support ring There is a sealing ring between the plates.

Optionally, the bottom plate further includes a bottom plate buckle located at the top of the through hole of the bottom plate; and, the indwelling housing has a locking block, and the locking block is snap-fitted and fixed with the bottom plate.

Optionally, the needle body is a hose, and the inner cavity of the indwelling housing further includes a wedge-shaped component, and the hose is arranged between the wedge-shaped component and the indwelling housing.

Optionally, the needle body is a hard needle, and the indwelling housing is glued or injection molded connected to the top of the hard needle.

Optionally, there are a plurality of capillary ventilation grooves on the interference bead.

Optionally, there is a bottom plate under the bottom plate, and the bottom of the bottom plate has a welding dot matrix or a glue point groove, and the bottom plate and the bottom plate are connected by ultrasonic welding or gluing.

Optionally, the floor adhesive tape has ventilation holes.

The second aspect of the present invention proposes a method for using the waterproof indwelling needle system, comprising: aligning the indwelling housing with the through hole of the bottom plate, and then fastening the indwelling needle and the bottom plate through an auxiliary implanting device, And make the interference convex ring and the support ring plate interference fit, or the sealing ring is embedded between the indwelling housing and the support ring plate.

The waterproof indwelling needle system and its use method provided by the present invention, in the first aspect, because the indwelling needle itself has a sealing cushion, it can be waterproof; the indwelling needle and the bottom plate adopt an interference fit or a sealing ring to realize waterproof between the indwelling needle and the bottom plate; The bottom plate is applied to the user's body through the bottom plate adhesive tape to realize the waterproofing of the bottom plate and the user's body surface, so the comprehensive waterproof performance is better. In the second aspect, due to the use of interference fit or sealing ring, the installation structure in the prior art is omitted, so it has the advantages of simple structure, low manufacturing cost and convenient use.

Description of drawings

The accompanying drawings are used to better understand the present invention, and do not constitute improper limitations to the present invention. in:

Fig. 1 is the structural representation of the hypodermic indwelling needle of prior art;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is a schematic structural view of the waterproof indwelling needle system with interference fit of the present invention;

Fig. 4 is a schematic structural view of the bottom plate in Fig. 3;

Fig. 5 is a schematic perspective view of the bottom plate in Fig. 3;

Fig. 6 is a schematic perspective view of the indwelling housing in Fig. 3;

Fig. 7 is a schematic cross-sectional view of a hose-shaped indwelling needle of the waterproof indwelling needle system of the present invention;

Fig. 8 is a schematic cross-sectional view of a hard-needled indwelling needle of the waterproof indwelling needle system of the present invention;

Fig. 9 is a schematic structural view of the waterproof indwelling needle system with a sealing ring of the present invention;

Fig. 10 is a schematic diagram of the welding dot matrix of the waterproof indwelling needle system of the present invention.

In the picture:

1-bottom plate, 2-positioning plate, 3-plastic shell, 4-accommodating groove, 5-sealing cushion, 6-wedge-shaped part, 7-indwelling hose, 9-fixing tube, 10-limiting plate, 11-tie rod , 12-spring, 13-limit rod, 14-pull plate, 15-guide block;

110-bottom plate; 111-bottom plate through hole; 112-supporting ring plate; 113-bottom plate buckle; 114-welding lattice; 120-indwelling needle; -sealing gasket; 121.4-interference protruding ring; 121.5-capillary venting groove; 122-needle body; 122a-hose; 122b-hard needle; 123-wedge-shaped part;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", The orientations or positional relationships indicated by "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the scope of the invention.

As shown in FIGS. 3 to 10 , the waterproof indwelling needle system according to the embodiment of the present invention may include a bottom plate 110 and an indwelling needle 120 . The bottom plate 110 mainly includes a bottom plate through hole 111 and a support ring plate 112 located at the bottom of the bottom plate through hole 111 . The indwelling needle 120 mainly includes an indwelling housing 121 and a needle body 122 . Wherein, the inner cavity of the indwelling housing 121 is provided with a receiving groove 121.2, and a sealing gasket 121.3 is arranged in the receiving groove 121.2. The top of the needle body 122 is located inside the indwelling housing 121 , and the bottom of the needle body 122 passes through the indwelling housing 121 and the through hole 111 of the bottom plate. The lower part of the indwelling housing 121 has an interference bead 121.4 (as shown in FIG. 3 ) capable of forming an interference fit with the support ring plate 112, or a sealing ring 130 (as shown in FIG. 9).

In order to better fix the connection, in the waterproof indwelling needle system, the bottom plate 110 also includes a bottom plate buckle 113 located on the top of the bottom plate through hole 111; Fit fixed.

In the interference technical scheme, the difference between the outer diameter of the interference convex ring 121.4 and the inner diameter of the support ring plate 112 should be reasonably designed. If the difference is too small, the two cannot effectively form an interference fit; if the difference is too large, it is difficult for the interference bead 121.4 to squeeze into the supporting ring plate 112.

In the sealing ring technical solution, the sealing ring 130 can be made of elastic materials such as silica gel and rubber.

The needle body 122 can be a flexible tube or a rigid needle.

As shown in FIG. 6 , the needle body 122 is a flexible tube 122 a , and the inner cavity of the indwelling housing 121 further includes a wedge-shaped component 123 , and the flexible tube 122 a is arranged between the wedge-shaped component 123 and the indwelling housing 121 .

As shown in Figure 7, the needle body 122 is a hard needle 122b, and the inner cavity of the indwelling housing 121 also includes a dispensing groove 124, and the glue dispensing groove 124 is adhesively connected to the top outer surface of the hard needle 122b. In addition to the adhesive connection shown in FIG. 7, the top of the indwelling shell 121 and the hard needle 122b can also be connected by injection molding.

In order to improve air permeability, a plurality of capillary ventilation grooves 121.5 can be arranged on the interference bead 121.4. When the interference convex ring 121.4 is in interference fit with the support ring plate 112, a capillary ventilation through hole is formed between the capillary ventilation groove 121.5 and the support ring plate 122.

There may be a bottom plate adhesive under the bottom plate 110, and the bottom of the bottom plate 110 has a welding dot matrix 114 (as shown in FIG. 10 ) or a dispensing groove, and the bottom plate 110 and the bottom plate adhesive are connected by ultrasonic welding or bonding. In this way, the bottom plate can be laid on the user's skin surface. The floor adhesive tape is preferably a medical adhesive tape with air holes.

The method of using the waterproof indwelling needle system according to the embodiment of the present invention includes: aligning the indwelling housing 121 with the through hole 111 of the bottom plate, and then fastening the indwelling needle 120 with the bottom plate 110 through the auxiliary implantation device, and making the interference bead 121.4 The interference fit with the support ring plate 112 , or the sealing ring 130 is embedded between the indwelling housing 121 and the support ring plate 112 .

The waterproof indwelling needle system and its use method provided by the present invention, in the first aspect, because the indwelling needle itself has a sealing gasket, it can be waterproof; the indwelling needle and the bottom plate adopt an interference fit or a sealing ring to realize waterproof between the indwelling needle and the bottom plate; the bottom plate The surface of the bottom plate and the user’s body is waterproofed by applying the base plate adhesive tape to the user’s body, so the overall waterproof performance is better. In the second aspect, since the interference fit scheme or the sealing ring scheme is adopted, the installation structure in the prior art is omitted, so it has the advantages of simple structure, low manufacturing cost and convenient use.

The above specific implementation methods do not constitute a limitation to the protection scope of the present invention. It should be apparent to those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

A waterproof indwelling needle system, characterized in that it includes a bottom plate and an indwelling needle, wherein:

The bottom plate includes: a bottom plate through hole and a support ring plate located at the bottom of the bottom plate through hole;

The indwelling needle includes: an indwelling housing and a needle body, wherein the inner cavity of the indwelling housing is provided with a receiving groove, and a sealing gasket is arranged in the accommodating groove; the top of the needle body is located on the indwelling housing Inside, the bottom of the needle body passes through the indwelling housing and the through hole of the bottom plate;

The lower part of the indwelling housing has an interference raised ring capable of forming an interference fit with the supporting ring plate, or a sealing ring is provided between the indwelling housing and the supporting ring plate.
The waterproof indwelling needle system according to claim 1, characterized in that,

The bottom plate also includes a bottom plate buckle located at the top of the through hole of the bottom plate; and, the indwelling housing has a locking block, and the locking block is snap-fitted and fixed with the bottom plate.
The waterproof indwelling needle system according to claim 1, characterized in that,

The needle body is a hose, and the inner cavity of the indwelling housing further includes a wedge-shaped component, and the hose is arranged between the wedge-shaped component and the indwelling housing.
The waterproof indwelling needle system according to claim 1, characterized in that,

The needle body is a hard needle, and the indwelling housing is connected with the top of the hard needle by adhesive or injection molding.
The waterproof indwelling needle system according to claim 1, characterized in that there are a plurality of capillary ventilation grooves on the interference collar.
The waterproof indwelling needle system according to claim 1, characterized in that, there is a base plate under the base plate, and the bottom of the base plate has a welding dot matrix or a dispensing groove, and the base plate and the base plate are connected by ultrasonic welding or bonding .
The waterproof indwelling needle system according to claim 1, characterized in that the bottom plate adhesive tape has air holes.
The method of using the waterproof indwelling needle system according to any one of claims 1 to 7, characterized in that it includes: aligning the indwelling housing with the through hole of the bottom plate, and then inserting the indwelling needle system through an auxiliary implanting device. The indwelling needle is fastened with the bottom plate, and the interference convex ring is in interference fit with the support ring plate, or the sealing ring is embedded between the indwelling housing and the support ring plate.