WO2018133028A1

WO2018133028A1 - Shielded indwelling needle with external application wings

Info

Publication number: WO2018133028A1
Application number: PCT/CN2017/071912
Authority: WO
Inventors: 陈永曦
Original assignee: 福建省百仕韦医用高分子股份有限公司
Priority date: 2017-01-20
Filing date: 2017-01-20
Publication date: 2018-07-26
Also published as: CN110139682B; CN110139682A

Abstract

A shielded indwelling needle, particularly a shielded indwelling needle with external application wings (5). The shielded indwelling needle comprises a puncture component (1), an indwelling cannula component (2) comprising a cannula holder (2.1), a shield (3), and the application wings (5), and is characterized by the application wings (5) being a separate structure relative to the indwelling cannula component (2) or being movably connected to the cannula holder (2.1) as movable application wings. When preparing for puncture, a front section of the cannula holder (2.1) exposed from the shield (3) is pushed forward to enter an application wings sleeve cavity (5.3) to achieve engagement of the cannula holder (2.1), or the application wings are connected to an attachment component exposed from the shield (3) to form attached application wings, the bottom of the attachment component passing through a slot (3.1) of the shield (3) to connect to the cannula holder (2.1). Compared to the prior art, the application wings (5) are provided outside the shield (3) and do not occupy an inner cavity of the shield (3), allowing a thinner main body of the shield (3), resulting in ease of use. Wings (5.2) can also be turned and folded, allowing the entire indwelling needle to occupy less space, achieving convenient storage.

Description

Sheathed indwelling needle for externally coated wings

Technical field

The present invention relates to a sheath-type indwelling needle, and more particularly to a sheath-type indwelling needle of an external flap.

Background technique

Prior art indwelling needles have some types of indwelling catheter assemblies with a flap, in which case the flap is fixedly attached or integrally formed with the catheter hub. If the indwelling needle is a sheathed indwelling needle, in particular, an indwelling needle arranged by a one-side slotted sheath, in order to accommodate the joint between the flap and the catheter seat, the sheath body necessarily needs to be very large or thick. This is inconvenient for clinical use.

Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the deficiencies of the prior art and to provide a sheath-type indwelling needle of an outer flap having a sheath body having a small size and facilitating clinical operation.

The object of the present invention is achieved by the following route.

A sheath-type indwelling needle for an externally coated wing, including a piercing assembly, an indwelling catheter assembly including a catheter hub, a sheath 3, and a flap, the main point of which is that the flap is detachably connected to the catheter hub or to the catheter hub. For the active application wing, the puncture preparation is performed, and the front part of the catheter seat which is exposed outside the sheath is pushed forward to penetrate the sheath sleeve cavity and complete the fastening with the catheter seat, or is connected with the accessory exposed outside the sheath for attachment. The wing, the bottom of the attachment is connected to the catheter hub through a slot in the sheath.

In this way, the dressing can be placed outside the sheath during assembly, and the sheath cavity is not occupied, which makes the sheath body thin and convenient to operate.

The object of the present invention can also be achieved by the following means.

The activity wrap has the following preferences:

The movable wrap is composed of a central sleeve and fins that are placed on both sides of the sleeve, and the socket is located in the lumen of the sleeve.

After the indwelling needle body is assembled, the movable flap is inserted into the front end of the sheath.

In this way, the separate application of the applicator and the indwelling needle body is facilitated, and the shape of the entire indwelling needle is also relatively compact.

The rear end of the sleeve of the movable flap is provided as a circumferentially spaced apart insertion claw that is inserted into the inner cavity of the front end of the sheath.

The insertion claws facilitate elastic deformation in the circumferential direction to facilitate the insertion.

Preferably, the fastening means for fastening the movable flap to the catheter hub is symmetrically distributed on both sides of the catheter hub.

A buckle hole is formed on the sleeve of the movable wing, and a corresponding card is buckled at the corresponding portion of the catheter seat.

Preferably, the fastening should be provided as a one-way fastening device that is reversed. Specifically, the present buckle-convex card device is designed such that the front end has a wedge shape for easy insertion, and the rear end is formed in a vertical or reverse hook shape which can be reversely stopped.

The shape of the sleeve cavity is conjugate with the shape of the corresponding insertion portion of the front section of the catheter seat, and preferably has a taper shape for facilitating the connection of the socket.

A top observation window is opened at the top of the sleeve, and a corresponding portion of the catheter socket inserted in the socket cavity is exposed in the observation window.

In this way, it is convenient to observe the blood return of the indwelling operation.

The viewing window is also suitable as a buttonhole in the buttonhole-convex card device, and the rear edge is adapted to be snap-fitted with a corresponding male card on the catheter hub.

There are the following preferences for attaching the flap:

When the attachment flap is used, the sleeve has a slot, and the slot may be provided on one side or on both sides. In the prior art, there is a sheath with a single side slot or a double side slot. . With such a slot, an accessory is provided to connect the applicator located outside the sheath to the catheter hub within the sheath and the other member to which the catheter hub is secured (e.g., a dosing device). The dosing device generally includes a dosing body and a dust cap.

A preferred solution is:

The attachment flap is composed of a flap on both sides and a joint portion connecting the two flaps to a connecting piece. The two flaps are integrally formed with the joint portion and the connecting piece, and the joint portion is connected to the upper and lower connecting pieces of different heights. And the flap, the middle portion of the connecting piece is connected with the main body of the dosing port.

Thus, the attachment flap is fixed relative to the dosing body of the dosing device. In the case of indwelling work, the application wing is suspended relative to the catheter seat, and the two are not connected.

Another preferred solution is:

The attached applicator has an omega shape consisting of a central inverted U-shaped sleeve and wings spaced on either side of the sleeve and joints on both sides of the connecting sleeve and the flap, the inverted U-shaped sleeve having a bottom An inner cavity of the opening, the inner cavity surface is similar to the corresponding profile surface of the catheter seat to be fastened, and the attachment wing is connected to the main body of the medicine supply port through a connecting piece, and the joint portion is in an upright state and is connected to the upper and lower sides. The connecting piece and the wing piece are connected to each other, and the middle part of the connecting piece is connected with the main body of the feeding port, and the connecting piece is horizontally arranged with a folding slot which is convenient for folding and flipping the connecting piece, and the folding groove is located at the main body of the feeding port and the attachment Between the joints of the wings, after the indwelling needle body is assembled, the attached applicator is placed outside the sheath in a folding and upward posture, and after the piercing preparation is completed, the attached applicator is folded in a downwardly folded posture to be engaged in the bare On the catheter hub outside the sheath.

The connecting sheet is provided with a folding slit which is easy to fold and flip, which is common in the prior art and is generally easy to realize on a tough plastic material. I won't go into details here.

In this solution, the applicator is attached to the catheter hub during the indwelling operation.

The above two preferred embodiments may further preferably be:

The middle portion of the connecting piece connected with the main body of the dosing mouth has a ring shape, and the ring is mechanically matched on the main body of the dosing port.

The above two preferred embodiments may further preferably be:

The other end of the connecting piece has an extended section, and the end of the extended section is connected with the dust cap. At this time, the extending section of the connecting piece is provided with a folding slot which is convenient for folding and flipping the connecting piece, and the dust cap is folded and folded and fastened. Add the head of the body of the mouth.

For easier storage, the flaps of the above two preferred embodiments can be designed such that the joints on either side of the flap are longitudinally provided with a fold slot that facilitates folding and folding of the flap.

The term "longitudinal" refers to the length direction along the indwelling needle.

In summary, the present invention has the following advantages over the prior art: the flap is disposed outside the sheath and does not occupy the inner cavity of the sheath, so that the sheath body can be thinned and convenient to operate. At the same time, the flaps are folded and folded, so that the entire indwelling needle takes up less space and is convenient for storage.

DRAWINGS

Figure 1 is a schematic perspective view showing the structure of a sheath-type indwelling needle of the external flap according to the present invention;

Figure 2 is a schematic perspective cross-sectional view showing the structure of a sheath-type indwelling needle of the external flap according to the present invention;

3 is a schematic perspective sectional view showing the structure of an indwelling catheter assembly, a dosing device, and a movable wrap in a sheath-type indwelling needle of the externally coated wing according to the present invention;

Figure 4 is a schematic perspective view showing the structure of the indwelling catheter assembly and the dosing device and the movable applicator in the sheath-type indwelling needle of the externally coated wing of the present invention;

Figure 5 is a schematic perspective view showing the structure of the movable flap in the sheath-type indwelling needle of the external coated wing of the present invention;

Figure 6 is a schematic perspective view showing another structure in the axial direction of the movable wrap in the sheath-type indwelling needle of the external flap according to the present invention;

Figure 7 is a schematic perspective view showing the structure of the catheter holder and the medicated mouth main body in the sheath-type indwelling needle of the externally applied wing;

Figure 8 is a perspective view showing the structure of another axial direction of the catheter hub and the medicated mouth main body in the sheath-type indwelling needle of the external flap according to the present invention;

Figure 9 is a view showing the axial direction of the catheter hub and the medicated mouth main body in the sheath-type indwelling needle of the externally coated wing of the present invention; Schematic perspective view;

Figure 10 is a schematic perspective view showing the structure of an indwelling catheter assembly and a dosing device in a sheath-type indwelling needle of the externally coated wing of the present invention;

Figure 11 is a schematic perspective view showing the state of the sheath-type indwelling needle of the externally applied flap of the present invention when the movable flap is just inserted into the catheter hub;

Figure 12 is a schematic perspective view showing the state of the sheath-type indwelling needle of the externally applied flap of the present invention when the movable flap is inserted into the catheter hub to complete the puncture preparation;

Figure 13 is a schematic perspective view showing the structure of the attachment flap and the connecting piece and the dust cap in the sheath type indwelling needle of the external flap according to the present invention;

Figure 14 is a schematic perspective view showing another structure of the attachment flap and the connecting piece and the dust cap in the sheath type indwelling needle of the external flap according to the present invention;

Figure 15 is a schematic perspective view of the structure of the indwelling catheter assembly and the dosing device in the sheath-type indwelling needle of the externally coated wing of the present invention;

Figure 16 is a schematic perspective sectional view showing the structure of the indwelling catheter assembly and the dosing device and the movable applicator in the indwelling state of the sheath-type indwelling needle of the externally applied wing according to the present invention;

Figure 17 is a schematic perspective view showing the structure of the attachment flap and the connecting piece and the dust cap in the sheath type indwelling needle of the external flap according to the present invention;

Figure 18 is a schematic perspective sectional view showing the structure of the indwelling catheter assembly and the dosing device and the movable applicator in the sheath-type indwelling needle of the externally coated wing according to the present invention;

Figure 19 is a schematic perspective sectional view showing the structure of the indwelling catheter assembly and the dosing device and the movable flap in the indwelling state of the sheath-type indwelling needle of the externally applied wing according to the present invention;

Figure 20 is a schematic perspective view showing the structure of the sheath-type indwelling needle of the external flap according to the present invention before the puncture preparation.

Figure 21 is a schematic perspective view showing the structure of the sheath-type indwelling needle of the external flap according to the present invention in a state in which the puncture preparation process is performed;

Fig. 22 is a schematic perspective view showing the state of the sheath-type indwelling needle of the external flap according to the present invention after the puncture preparation is completed; the present invention will be described in more detail below with reference to the accompanying drawings.

detailed description

Embodiment 1:

1 and 2, a sheath-type indwelling needle of an external flap includes a puncture assembly 1, an indwelling catheter assembly 2 including a catheter hub, a sheath 3, a stopper pin 4, a flap 5, and a dosing device 6. The flap 5 is in a discrete configuration relative to the indwelling catheter assembly 2, and the catheter hub 2.1 The activity is connected and the activity is applied. After the indwelling needle body is assembled, the movable flap 5 is inserted into the front end of the sheath 3. In this way, the separate application of the applicator and the indwelling needle body is facilitated, and the shape of the entire indwelling needle is also relatively compact.

Referring to Figures 3-6, the movable flap 5 is comprised of a central sleeve 5.1 and a tab 5.2 disposed on either side of the sleeve, the sleeve chamber 5.3 being located within the sleeve lumen. The rear end of the sleeve 5.1 of the movable flap 5 is arranged as a circumferentially spaced apart insertion claw 5.4 which is inserted into the inner cavity of the front end of the sheath 3. The insertion claw 5.4 facilitates elastic deformation in the circumferential direction to facilitate the insertion. Preferably, the fastening means for engaging the movable flap 5 with the catheter hub 2.1 is symmetrically distributed on both sides of the catheter hub 2.1. A buckle hole 5.5 is formed on the sleeve 5.1 of the movable wing, and a corresponding position 2.2 of the catheter seat 2.1 is provided with a convex card 2.2 that is buckled with the buckle hole 5.5. The shape of the sleeve sleeve 5.3 is conjugate with the shape of the plug portion of the front section of the corresponding catheter holder 2.1, and each has a tapered shape for facilitating the connection of the sleeve. The top of the sleeve 5.1 is provided with a through observation window 5.6.

Referring to Figure 3, the corresponding portion of the catheter hub 2.1 that is inserted into the socket cavity is exposed in this viewing window 5.6. In this way, it is convenient to observe the blood return of the indwelling operation.

Referring to Figures 9 and 10, the viewing window 5.6 is also suitable as a buttonhole in a buttonhole-convex card device, the rear edge of which is adapted to be snap-fitted to a corresponding male card 2.2 on the catheter hub 2.1.

Referring to Figures 7-10, the fastening is preferably provided as a one-way fastening device that is reversed. Specifically, the present card is designed such that the front end of the card is designed to have a wedge shape for easy insertion, and the rear end is formed in a vertical or reverse hook shape which can be reversely stopped.

Referring to Figures 1 - 4 and 7 - 10, the dosing device 6 is composed of a dosing body 6.2 and a dust cap 6.1. The medicated mouth main body 6.2 has a sleeve shape and is vertically inserted into the catheter seat 2.1, and the inner cavity thereof penetrates the inner cavity of the catheter seat 2.1. The abutting portion of the applicator port body 6.2 exposed on the catheter hub 2.1 has a flat waist 6.3 which is received in the slot 3.1 of the sheath 3 so that the width of the slot 3.1 is sufficiently narrow, so Flat narrowing. The dust cap 6.1 is fastened to the head of the dosing body 6.2.

1 and 2, this is a state in which the movable flap 5 is inserted into the front end of the sheath 3 after the indwelling needle body is assembled.

Referring to Figures 11 and 12, the catheter preparation is performed while pushing forward the catheter hub 2.1 outside the sheath 3 to penetrate the sheath 5 socket 5.3 and complete the fastening with the catheter hub 2.1. When the indwelling needle is operated, the indwelling needle body is first pushed forward in the sheath 3, and the needle tube and the catheter first pass through the sheathing socket chamber 5.3 inserted at the front end of the sheath, and then slide forward, and the front end of the catheter seat 2.1 penetrates The wing sleeve is connected to the cavity 5.3, and the front end of the front catheter seat 2.1 is attached to the sheath sleeve cavity 5.3. At the same time, the convex card 2.2 on the catheter seat is fastened with the fastening hole 5.5 of the application wing, and further moves forward, firstly, the needle body is driven. The flap 5 is separated from the sheath 3, and then the slide sleeve is inserted into the positioning groove between the catheter hub 2.1 and the hub, and the indwelling needle is ready for puncture.

The sheath-type indwelling needle of the externally applied wing of the present invention shown in Fig. 11 is in the form of the movable flap just entering the catheter hub state. Fig. 12 is a view showing a state in which the sheath-type indwelling needle of the externally applied flap of the present invention is prepared after the movable flap is inserted into the catheter hub.

Referring to Fig. 3, this is an assembly state diagram of the indwelling infusion operation left after the puncture assembly 1 and the sheath 3 are removed after the completion of the puncture, the assembly including the indwelling catheter assembly 2, the applicator wing 5, and the dosing device 6.

The parts not described in this embodiment are the same as those in the prior art.

Embodiment 2:

Referring to Figures 20-21, a sheath-type indwelling needle for an external flap includes a piercing assembly 1, an indwelling catheter assembly 2 including a catheter hub, a sheath 3, a stop pin 4, a flap 5, and a dosing device 6. The flap 5 is spaced apart from the indwelling catheter assembly 2 and is attached to an attachment that is exposed outside the sheath 3 to attach the flap 5, the bottom of which is connected to the catheter hub 2.1 through a slot 3.1 in the sheath 3. The jacket has a slot 2.1 which is a one-sided arrangement in the present embodiment. There are many such single-sided or double-slot jackets in the prior art. The dosing device 6 generally consists of a dosing body 6.2 and a dust cap 6.1. The attachment to the attachment flap 5 described above is the medicated mouth body 6.2.

Referring to Figures 13-16, the attachment flap 5 has an omega shape, consisting of a central inverted U-shaped sleeve 5.1 and tabs 5.2 disposed on either side of the sleeve 5.1 and connecting the sleeve 5.1 and the flap 5.2. The two sides of the joint portion 5.7, the inverted U-shaped sleeve 5.1 has a bottom open inner cavity 5.8, the inner cavity 5.8 profile is similar to the corresponding profile of the catheter seat 2.1 that is fastened, the attachment flap 5 passes through a The connecting piece 7 is connected to the medicinal mouth main body 6.2, and the joint portion 5.7 is connected to the upper and lower sides of the connecting piece 7 and the flap 5.2. The middle portion of the connecting piece 7 is connected with the medicinal opening main body 6.2, and the dosing port The middle portion of the connecting piece 7 connected to the main body 6.2 has a circular ring 7.1 which is fitted on the medicated mouth main body 6.2 in a mechanical fit manner. Thus, the attachment flap 5 is fixed relative to the dosing body 6.2 of the dosing device. The web is transversely disposed with a folded slot 7.3 that facilitates folding and flipping of the web, the folded slot 7.3 being located between the ring 7.1 and the joint 5.7 of the attached flap. The other end of the connecting piece 7 has an extension, and the end of the extension is connected with the dust cap 6.1. At this time, the extension of the connecting piece is provided with a folding slit 7.2 for folding and flipping the connecting piece, and the dust cap 6.1 is folded and folded. The back is fastened to the head of the dosing body 6.2. The connecting sheet is provided with a folding slit which is easy to fold and flip, which is common in the prior art and is generally easy to realize on a tough plastic material. I won't go into details here.

Referring to Figures 15, 20 and 21, after the indwelling needle body is assembled until the puncture is completed, the attachment flap 5 is positioned outside the sheath in a folded, inverted upward position.

Referring to Fig. 20, this is a state in which the sheath-type indwelling needle of the external flap of the present invention is in a state before the puncture preparation.

Referring to Fig. 21, this is a state in which the sheath-type indwelling needle of the external flap of the present invention is in the process of puncture preparation.

Referring to Figure 15, this is the preparation for indwelling infusion after the puncture assembly 1 and the sheath 3 are removed after the puncture is completed. A component state diagram of a job comprising an indwelling catheter assembly 2, a flap 5 and a dosing device 6.

Referring to Figures 16 and 22, before the infusion operation is completed after the completion of the puncture preparation, the attachment flap 5 is snapped onto the catheter hub 2.1 exposed outside the sheath in a folded-down posture. The applicator wing 5 is attached to the catheter hub 2.1 during the indwelling operation.

The parts not described in this embodiment are the same as those in the first embodiment.

Best embodiment:

Referring to Figures 17, 18 and 19, the attachment flap 5 is composed of flaps 5.2 on both sides and a joint 5.7 connecting the two flaps 5.2 to a web 7, the flaps 5.2 and the joints 5.7 and the tabs 7Integral structure, the joint portion 5.7 is connected to the upper and lower sides of the connecting piece 7 and the flap 5.2, and the middle portion of the connecting piece 7 is connected to the dosing port main body 6.2. The middle portion of the connecting piece 7 connected to the main body 6.2 of the dosing port has a circular ring 7.1 which is fitted on the main body 6.2 of the dosing port in a mechanically fit manner. Thus, the attachment flap 5 is fixed relative to the dosing body 6.2 of the dosing device. In the case of indwelling work, the application wing is suspended relative to the catheter seat, and the two are not connected. The other end of the connecting piece 7 has an extension, and the end of the extension is connected with the dust cap 6.1. At this time, the extension of the connecting piece is provided with a folding slit 7.2 for folding and flipping the connecting piece, and the dust cap 6.1 is folded and folded. The back is fastened to the head of the dosing body 6.2. For easier storage, the joints 5.7 on both sides of the flap 5.2 are provided with a folded slit 5.9 in the longitudinal direction to facilitate folding and folding of the flap. The term "longitudinal" refers to the length direction along the indwelling needle.

Referring to Fig. 18, this is a state diagram of the components left for the indwelling operation after the puncture assembly 1 and the sheath 3 are removed after the completion of the puncture, and the flap is still in a folded state. The assembly includes an indwelling catheter assembly 2, a flap 5 and a dosing device 6.

Referring to Fig. 19, before the infusion operation is completed after the completion of the puncture preparation, the attachment flap 5 is in a posture of folding and turning downward to perform the indwelling operation. In the indwelling operation, the application wing is suspended relative to the catheter seat, and the two are not connected.

The parts not described in this embodiment are the same as those in the second embodiment.

Claims

A sheath-type indwelling needle for an externally coated wing, comprising a piercing assembly, an indwelling catheter assembly including a catheter hub, a sheath 3 and a flap, wherein the flap is detachably connected to the catheter assembly or is operatively coupled to the catheter hub The movable wing is prepared for puncture and is pushed forward to expose the front part of the catheter seat outside the sheath, penetrates into the sheath socket and completes the fastening with the catheter seat, or is connected with the accessory exposed outside the sheath to attach the wing The bottom of the attachment is connected to the catheter hub through a slot in the sheath.
The sheath-type indwelling needle of the externally-applied wing according to claim 1, wherein the movable flap is composed of a central sleeve and a flap which is disposed on both sides of the sleeve, and the sleeve cavity is located in the lumen of the sleeve. After the indwelling needle body is assembled, the movable flap is inserted into the front end of the sheath.
The sheath-type indwelling needle of the externally-applied wing according to claim 2, wherein the rear end of the sleeve of the movable flap is disposed as a plug claw spaced apart in the circumferential direction, and the plug claw is inserted into the sheath In the inner cavity of the front end.
The sheath-type indwelling needle of the externally coated wing according to claim 1, wherein the fastening means for fastening the movable flap to the catheter seat is preferably symmetrically distributed on both sides of the catheter hub.
The sheath-type indwelling needle of the externally coated wing according to claim 1 or 4, wherein the sleeve of the movable flap is formed with a button hole, and the corresponding portion of the catheter seat is provided with a protrusion that is buckled with the button hole. The card, the buttonhole and the convex card form a fastening device.
The sheath-type indwelling needle for an external flap according to claim 5, wherein the fastening device is a one-way fastening device that is reversed.
The sheath-type indwelling needle of the externally-applied wing according to claim 6, wherein the convex card of the one-way fastening device is designed such that the front end is in the shape of a wedge for easy insertion, and the rear end is formed to be vertically inverted. Shape or anti-hook shape.
The sheath-type indwelling needle of the externally applied wing according to claim 2 or 3, wherein the shape of the sleeve sleeve is conjugate with the shape of the insertion portion of the front section of the corresponding catheter seat, and preferably is a convenient insertion sleeve. The taper of the connection.
The sheath-type indwelling needle of the external flap according to claim 2 or 3, wherein the top of the sleeve is provided with a through observation window, and the corresponding portion of the catheter socket inserted in the socket is exposed in the observation window. .
The sheath-type indwelling needle of the external flap according to claim 9, wherein the observation window is suitable as a buttonhole in the buttonhole-convex card device, and the rear edge is adapted to be a corresponding convex card on the catheter socket. Buckle connection.
The sheath-type indwelling needle of the externally-applied wing according to claim 1, wherein the sheath has a slot, and the slot is provided on one side or on both sides, and an accessory connection is provided for protection. The outer appliqué is attached to the applicator and the catheter hub within the sheath is the other member to which the catheter hub is secured.
The sheath-type indwelling needle of the externally coated wing according to claim 11, wherein the attachment flap is composed of a flap on both sides and a joint portion connecting the two flaps to a connecting piece, the two flaps and the joint The connecting portion and the connecting piece are integrally formed, and the connecting portion is connected to the upper and lower connecting pieces and the fins in an upright state, and the middle portion of the connecting piece is connected with the main body of the dosing port, and the connecting piece is the special accessory.
The sheath-type indwelling needle of the externally coated wing according to claim 11, wherein the attachment flap has an omega shape, and the central inverted U-shaped sleeve and the fins which are disposed on both sides of the sleeve And an inner joint portion of the connecting sleeve and the fin, the inverted U-shaped sleeve has an inner cavity with a bottom opening, and the inner cavity surface is similar to the corresponding contour of the catheter seat to which the button is fastened, and the attached wing is attached The connection piece is connected to the main body of the dosing port by a connecting piece, and the joint portion is connected to the upper and lower connecting pieces and the fins in an upright state, and the middle portion of the connecting piece is connected with the main body of the dosing port, and the connecting piece is horizontally arranged to facilitate the connection. The folding flap is folded and folded, and the folding slot is located between the main body of the feeding port and the joint of the attached applicator. After the indwelling needle body is assembled, the applicator flap is folded and turned upward to be located outside the sheath. After the puncture preparation is completed, the attachment flap is fastened to the catheter seat exposed outside the sheath in a folded, inverted downward posture, and the connecting piece is the special attachment described.
The sheath-type indwelling needle of the externally-applied wing according to claim 12 or 13, wherein a central portion of the connecting piece connected to the main body of the filling port has a ring shape, and the ring is mechanically fitted to the medicine. On the main body of the mouth.
The sheath-type indwelling needle of the externally applied wing according to claim 12 or 13, wherein the other end of the connecting piece has an extended section, and the end of the extended section is connected with the dust cap, and the connecting piece is extended on the connecting piece. The cross-cut is provided with a folding slot for facilitating folding and flipping of the connecting piece, and the dust cap is folded and folded and fastened to the head of the main body of the dosing port.
A sheath-type indwelling needle for an externally coated wing according to claim 12 or claim 13 wherein, in order to facilitate storage, the flaps of the above two preferred embodiments can be designed such that: The joints on both sides are provided with a folded slit in the longitudinal direction to facilitate folding and folding of the flap.