WO2014063353A1 - Puncture needle tube component of indwelling needle with needle tip protective sleeve - Google Patents

Abstract

A puncture needle tube component of an indwelling needle with a needle tip protective sleeve comprises a puncture needle tube (1), a needle seat (2), a ventilating plug (3) and an operating handle (6). A blood return observation cabin (21) is located in a core cavity of the needle seat (2). A tail end of the puncture needle tube (1) is inserted in a front end part of the blood return observation cabin (21) and is fixedly connected. The needle seat (2) extends along an axial direction of the inner cavity of the operating handle (6) and is fixedly connected to the operating handle (6). The ventilating plug (3) is fixedly plugged in the tail end of the blood return observation cabin (21). The puncture needle tube component enables the needle seat (2) to continue extending along the axial direction and increases a blood receiving volume and a blood receiving length of the blood return observation cabin (21). Not only the number of assembling fittings is reduced but also assembling is convenient and an operating misjudgment is not easy to happen. A positioning plug in the prior art is replaced with a bonder, so that the position of the needle seat (2) relative to the operating handle (6) can be adjusted in an assembling process to obtain an accurate distance.

Description

Puncture needle assembly with needle tip retaining needle  Summary of the invention

 Technical field

 The present invention relates to an apparatus for introducing a medium into a body, and more particularly to a puncture needle tube assembly having a needle tip protective sleeve indwelling needle.

 Background technique

 A puncture needle tube assembly with a needle tip protective sleeve in the prior art is shown in Fig. 1. The puncture needle tube 1 and the core chamber are the blood return observation chambers. The needle holder 2, the venting plug 3, the connecting rod 4, the positioning plug 5, and the operating handle 6 are composed. The end of the puncture needle 1 is inserted and fixed from the front end of the blood returning observation chamber 21, and the venting plug is inserted in advance. The front end of the connecting rod 4 is tightly fitted into the rear card slot of the needle holder 2, and a sealing glue is sealed between the connecting rod 4 and the needle seat 2 to prevent blood from oozing out from the gap during use, and after the sealing glue is solidified, the connection is made. Rod 4 The rear end protrudes into the inner cavity of the operating handle 6, reaches the rear end of the operating handle 6, and is fixed by the positioning plug 5 nested into the rear end of the operating handle. This puncture needle assembly has the following deficiencies 1 There are many assembly parts, and the process is cumbersome and inefficient; 2 The blood return observation volume is too small, the length is too short, the volume of blood volume is too small, and some blood causes obvious blood return observation, which is easy to cause the blood return of the capillary to be mistakenly referred to as blood return of the venous blood vessel, thus easily leading to misjudgment of operation.

 Summary of the invention

The object of the present invention is to overcome the deficiencies of the prior art and to provide a puncture needle tube assembly having a needle tip protective sleeve indwelling needle which has fewer assembly parts, is convenient to assemble, has high efficiency, and is less prone to operational misjudgment.

 The object of the present invention is achieved by the following means:

The puncture needle tube assembly with the needle tip protective sleeve indwelling needle comprises a puncture needle tube, a needle seat, a venting plug and an operating handle. The blood returning observation chamber is located in the core chamber of the needle seat, and the tail end of the puncture needle tube is inserted and fixed from the front end portion of the blood returning observation chamber. The main point of the composition is that the needle seat extends along the axial direction of the inner cavity of the operating handle and is fixed with the operating handle, and the venting plug is fixed at the tail of the blood returning observation bin.

In this way, the connecting rod is omitted, and the vacated cavity allows the needle holder to continue axially extending and increases the volume of blood volume and the length of blood transfusion of the blood returning observation chamber. Not only does it reduce assembly parts, but it is also less prone to operational misjudgment.

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

 The hub extends to the tail or tail of the operating handle and is secured to the operating handle.

The tail is the part near the end. This arrangement allows for maximum or near maximum expansion of the blood volume and blood volume, and also facilitates the implementation of the needle holder and the operating handle.

 Secure the needle holder and operating handle with an adhesive.

In the prior art, the needle tube assembly and even some fine dimensions of the indwelling needle, such as the distance (the distance from the tip of the needle tip to the foremost end of the catheter), etc., are completely dependent on the injection molding precision of each part, and cannot be adjusted during the assembly process, so that the assembly of parts is assembled. The accumulated error generated cannot be controlled, and problems such as assembly defective products and waste products are easily generated. The present invention replaces the prior art positioning plug with an adhesive on the basis of the above improvements, so that the relative position of the needle seat and the operating handle can be adjusted during assembly to obtain an accurate distance. This is an unexpected effect of the present invention.

The tail end of the operating handle is provided with a conical recess through which the rearwardly extending needle seat passes to be flush with the end face of the operating handle, and the adhesive is injected into the recess.

 The end of the venting plug is open to the space.

 This can maximize the ventilation area and ventilation efficiency, making the blood return fast.

The outer peripheral surface of the needle seat is a stepped member which is large in front and small, and the outer peripheral surface of the step of the tail section is a non-rotating surface, and the shape of the socket portion in the inner cavity of the operating handle corresponds to the outer peripheral surface of the needle seat. match.

 In this way, the needle hub is easily inserted from the front end of the operating handle, and the positioning of the needle seat in the circumferential direction of the operating handle is realized by the non-rotating surface.

 This non-rotating surface can be a square.

The inner handle of the operating handle can accommodate the puncture needle tube as a needle tip protective sleeve after the needle seat is retracted. Further, the operating handle can be composed of a telescopic protective sleeve.

In summary, the present invention has the following advantages over the prior art: the connecting rod is omitted, and the vacated cavity allows the needle holder to continue axially extending and increases the blood volume and blood volume of the blood returning observation chamber. Not only does it reduce assembly parts, it is easy to assemble, and it is not easy to cause operational misjudgment. The prior art positioning plug is replaced with an adhesive so that the relative position of the needle seat and the operating handle can be adjusted during assembly to obtain an accurate distance.

 DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic perspective view showing the structure of a puncture needle tube assembly having a needle tip protective sleeve in the prior art.

 2 is a schematic perspective view showing the structure of a puncture needle tube assembly having a needle tip protective sleeve indwelling needle according to the present invention.

 3 is a schematic view showing the structure of a puncture needle tube assembly with a needle tip protective sleeve in the puncture state according to the present invention.

 4 is a schematic view showing the structure of the puncture needle tube assembly with the needle tip protective sleeve in the withdrawn state according to the present invention.

 Fig. 5 is a schematic perspective view showing the appearance of a needle hub in an embodiment of the present invention.

 Figure 6 is a schematic perspective cross-sectional view showing the structure of the needle hub in the embodiment of the present invention.

 Label description:

 1 puncture needle 2 needle seat 21 blood return observation chamber 3 venting plug 4 connecting rod

 5 Positioning plug 6 Operating handle 61 Conical pocket 62 Outer tube

 The invention will now be described in greater detail with reference to the drawings.

 Best embodiment:

 Referring to Fig. 2, Fig. 3, Fig. 4, the puncture needle tube assembly with the needle tip protective sleeve indwelling needle, including the puncture needle tube 1 and the needle seat 2 , the venting plug 3 and the operating handle 6 , the blood returning observation chamber 21 is located in the needle core 2 core cavity, the tail end of the puncture needle tube 1 is inserted and fixed from the front end portion of the blood return observation chamber 21, the venting plug 3 The plug is fixed at the tail of the blood return observation chamber 21 and its tail end is open to the space, and the tail end of the operating handle 6 is provided with a conical recess 61 through which the needle holder 2 extending backward in the axial direction of the inner cavity of the operating handle 6 passes. Pocket 61 To the end of the operating handle 6 end face, the adhesive is injected into the recess 61 to achieve the bonding of the needle seat 2 to the operating handle 6. The operating handle 6 is composed of a telescopic protective cover, the above and the needle seat 2 Directly connected to the outer cylinder 62 in the telescoping sleeve, the tapered recess 61 is also located at its trailing end.

 Refer to Figure 5 and Figure 6, the needle seat 2 The outer peripheral surface is a stepped member which is large and small, and the outer peripheral surface of the step of the tail section is a square shape, and the shape of the socket portion of the inner handle of the operating handle 6 and the needle seat 2 matches the outer peripheral surface of the needle seat 2 .

 The parts not described in the present invention are the same as the prior art.

Claims (9)

The puncture needle tube assembly with the needle tip protective sleeve indwelling needle comprises a puncture needle tube, a needle seat, a venting plug and an operating handle. The blood returning observation chamber is located in the core chamber of the needle seat, and the tail end of the puncture needle tube is inserted and fixed from the front end portion of the blood returning observation chamber. The utility model is characterized in that the needle seat extends along the axial direction of the inner cavity of the operating handle and is fixed with the operating handle, and the venting plug is fixed at the tail of the blood returning observation bin. A puncture needle assembly having a tip guard indwelling needle according to claim 1 wherein the hub extends to the tail or tail end of the operating handle and is secured to the operating handle. A puncture needle assembly having a tip guard indwelling needle according to claim 1, wherein the needle holder and the operating handle are fixed using an adhesive. The puncture needle assembly with a needle tip protective sleeve according to claim 1, wherein the tail end of the operating handle is provided with a conical recess, and the rearwardly extending needle seat passes through the recess to the tail of the operating handle. The end faces are flush, the adhesive is injected into the recess and the needle holder and the operating handle are fixed. A puncture needle assembly having a tip guard indwelling needle according to claim 1 wherein the end of the venting plug is open to the space. The puncture needle tube assembly with a needle tip protective sleeve in accordance with claim 1, wherein the outer peripheral surface of the needle seat is a stepped member having a front large and a small step, and the outer peripheral surface of the step of the tail portion is a non-rotating The shape of the sleeve in the inner cavity of the operating handle and the outer peripheral surface of the needle holder are matched. A puncture needle assembly having a needle tip indwelling needle according to claim 6 wherein the non-rotating surface is a square. The puncture needle assembly with a needle tip indwelling needle according to claim 1, wherein the operating handle is a needle tip protective sleeve, and the inner cavity thereof can accommodate the puncture needle tube after the needle seat is withdrawn. A puncture needle assembly having a tip guard indwelling needle according to claim 8 wherein the operating handle is comprised of a telescoping protective sleeve.

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