CN215426602U

CN215426602U - Venous indwelling needle for low-plane puncture

Info

Publication number: CN215426602U
Application number: CN202121727653.1U
Authority: CN
Inventors: 陈文静; 郭丽芳; 赵春清
Original assignee: Jincheng University Hospital
Current assignee: Jincheng University Hospital
Priority date: 2021-07-27
Filing date: 2021-07-27
Publication date: 2022-01-07
Anticipated expiration: 2031-07-27

Abstract

The utility model relates to a venous indwelling needle for low-level puncture, which comprises a positive pressure connector, an extension tube, a single-hand clamp and a needle head, wherein the needle head is arranged at one end of the extension tube, the positive pressure connector is arranged at the other end of the extension tube, and the single-hand clamp is arranged on the extension tube; the needle head comprises a catheter, a needle holding handle, a needle core and a needle handle, wherein the surface of the needle handle, which is attached to the skin, is a plane; the width of the longitudinal section of the needle handle is gradually reduced along the thickness direction of the needle handle, the needle handle is of a hollow structure and is internally provided with an isolating plug, and the head end of the needle handle is fixedly connected with the catheter; the needle core is fixed at the head end of the needle holding handle and is positioned in the hollow needle handle, and the needle core penetrates through the isolating plug and is positioned in the catheter; the catheter is positioned at the center of the needle handle in the thickness direction and is positioned at the lower position. The venous indwelling needle for low-plane puncture can effectively solve the problems that when the existing conical needle handle shell is indwelling, an included angle and a gap are formed between the conical needle handle shell and a film, and mechanical phlebitis and medical instrument related pressure injury are easily caused.

Description

Venous indwelling needle for low-plane puncture

Technical Field

The utility model relates to the technical field of venous indwelling needles, in particular to a venous indwelling needle for low-plane puncture.

Background

At present, a vein indwelling needle clinically used in each hospital is an infusion tool, and the core components comprise a soft catheter or cannula which can be indwelling in a blood vessel, a stainless steel puncture guiding needle core and a cone-like needle handle made of transparent plastics. When in use, the catheter and the needle core are punctured into a blood vessel together, after the catheter correctly enters the blood vessel, the needle core is withdrawn, and only the soft catheter is detained in the blood vessel so as to carry out infusion treatment. However, when the special indwelling needle film is used for fixation, an included angle and a gap are formed between the outer shell of the cone-like transparent plastic needle handle and the surface of the skin, which conflict with the whole film-sticking concept of seamless tension-free skin-sticking, and the formed included angle and the gap not only cause mechanical phlebitis, but also easily accumulate sweat and secretion, so that the film-sticking is moist and pressure injury related to medical instruments is formed, and even liquid extravasation and local skin necrosis are caused in serious cases, so that economic loss is caused to patients, and extra workload is brought to clinical care work.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a low-plane puncture venous indwelling needle which can effectively solve the problems that when an existing conical needle handle shell is indwelling, an included angle and a gap are formed between the existing conical needle handle shell and a film, mechanical phlebitis and medical instrument related pressure injury are easily caused.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a venous indwelling needle for low-level puncture comprises a positive pressure joint, an extension tube, a single-hand clamp and a needle head, wherein the needle head is arranged at one end of the extension tube, the positive pressure joint is arranged at the other end of the extension tube, and the single-hand clamp is arranged on the extension tube; the needle head comprises a catheter, a needle holding handle, a needle core and a needle handle, wherein the surface of the needle handle, which is attached to the skin, is a plane; the width of the longitudinal section of the needle handle is gradually reduced along the thickness direction of the needle handle, the needle handle is of a hollow structure and is internally provided with an isolating plug, and the head end of the needle handle is fixedly connected with the catheter; the needle core is fixed at the head end of the needle holding handle and is positioned in the hollow needle handle, and the needle core penetrates through the isolating plug and is positioned in the catheter; the catheter is positioned at the center of the needle handle in the thickness direction and is positioned at the lower position.

Further, the catheter is located one third from the bottom surface of the needle shaft.

The design of the needle holding handle has the following two schemes:

the method comprises the following steps: hold the needle handle including holding the needle wing and fixed button, fixed button establishes at the end of needle handle and fixed button and nook closing member fixed connection, it is equipped with one to hold the needle wing, hold the needle wing and slide 180 levels left and right sides along the needle handle axial and rotate the setting on the needle handle, hold the needle wing and pass through fixed button swing joint.

The second is as follows: the needle holding wings are arranged on two sides of the needle handle symmetrically, the needle holding wings are arranged on the needle handle in a sliding mode along the axial direction of the needle handle, and the two needle holding wings are movably connected through a fixing button; the two symmetrically arranged needle holding wings are provided for facilitating the use of operators with different use habits (left-handed or right-handed).

Furthermore, a through hole is formed in the fixing button, a connecting rod is movably arranged in the through hole, fixing rings which are matched with the connecting rod in an inserting and embedding mode are arranged on the two needle holding wings, and the fixing rings and the fixing button are connected through the connecting rod.

Furthermore, two ends of the connecting rod are respectively provided with a one-way petal-shaped structure for preventing the connecting rod from slipping, and the opening ends of the two one-way petal-shaped structures are arranged towards the outside of the connecting rod; the connecting rod can be movably arranged in the inner ring of the fixing ring within a preset range.

Furthermore, the extension tube is arranged on the upper side of the needle handle through the fixing tube, and the axial included angle between the fixing tube and the needle handle is 15-30 degrees.

According to the vein indwelling needle for low-plane puncture provided by the technical scheme, the original conical-like plastic needle handle shell is changed into a trapezoidal-like plastic needle handle shell with a narrow upper part and a wide lower part, and the plane of the trocar in the center position is integrally moved downwards; after the operator holds the indwelling needle by hand to complete puncture, the angles between the cannula exposed out of the body surface and embedded into the blood vessel and the skin surface and the blood vessel where the cannula is positioned can be minimized, the mechanical stimulation to the skin surface and the blood vessel endothelium is reduced, and the occurrence of mechanical phlebitis is reduced; meanwhile, the reduction of the included angle and the improvement of the needle handle can reduce the shearing force and the pressure brought by the original conical needle handle, and the trapezoid-like base can be attached to the skin to the maximum extent, so that the formation of gaps is reduced, the incidence rate of dead angle formation when the adhesive film is wet and fixed without tension is reduced, and the purposes of reducing the incidence rate of complications and increasing the comfort level of a patient are achieved.

Drawings

FIG. 1 is a schematic structural view of a low-profile puncture venous indwelling needle according to embodiment 1;

FIG. 2 is a schematic structural view of a low-profile puncture venous indwelling needle according to embodiment 2;

FIG. 3 is an enlarged view of the structure at A in FIG. 2;

fig. 4 is a schematic cross-sectional view of a low-profile puncture venous indwelling needle as described in examples 1 and 2.

In the figure: 1. a needle handle; 11. an isolation plug; 2. a fixed tube; 3. a conduit; 4. a needle core; 5. a needle holding wing; 51. a fixing ring; 6. a fixing button; 7. a connecting rod; 71. a one-way petal structure.

Detailed Description

In order that the objects and advantages of the utility model will be more clearly understood, the following description is given in conjunction with the accompanying examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the utility model and does not strictly limit the scope of the utility model as specifically claimed.

Example 1

A venous indwelling needle for low-level puncture comprises a positive pressure joint, an extension tube, a single-hand clamp (not shown in the structural diagram) and a needle head, wherein the needle head is arranged at one end of the extension tube, the positive pressure joint is arranged at the other end of the extension tube, and the single-hand clamp is arranged on the extension tube; the needle head comprises a catheter 3, a needle holding handle, a needle core 4 and a needle handle 1, wherein the surface of the needle handle, which is attached to the skin, is a plane; the width of the longitudinal section of the needle handle 1 is gradually reduced along the thickness direction of the needle handle 1, the needle handle 1 is of a hollow structure and is internally provided with an isolating plug 11, and the head end of the needle handle 1 is fixedly connected with the catheter 3; the needle core 4 is fixed at the head end of the needle holding handle, the needle core 4 and the needle holding handle are positioned in the hollow needle handle 1, the needle core 4 penetrates through the isolating plug 11 and is positioned in the catheter 3, the needle holding handle comprises a needle holding wing 5 and a fixing button 6, the fixing button 6 is arranged at the tail end of the needle handle 1, the fixing button 6 is fixedly connected with the needle core 4, one needle holding wing 5 is arranged, the needle holding wing 5 slides on the needle handle 1 along the axial direction of the needle handle 1 and rotates in the radial direction, and the needle holding wing is movably connected through the fixing button; the catheter 3 is positioned at the lower center of the needle handle 1 in the thickness direction; particularly, the catheter 3 is positioned at a position which is one third of the distance from the bottom surface of the needle handle 1; the extension tube is fixed on the left side of the needle handle 1 through the fixed tube 2, and the axial included angle between the fixed tube 2 and the needle handle 1 is 30 degrees; when the fixed tube is arranged on the left side of the needle handle, the fixed tube is convenient for an operator using the hand as the right hand to use, and when the fixed tube is arranged on the right side of the needle handle, the fixed tube is convenient for an operator using the hand as the left hand to use.

The usage of the low-plane puncture venous indwelling needle of the embodiment is as follows: after the operator holds the indwelling needle by hand to complete puncture, the needle core and the needle holding wings are withdrawn, the adhesive film is adhered to the needle handle and is adhered to the skin, and one side of the needle handle close to the skin is a plane, so that the relevant pressure injury of the conical needle handle to the medical equipment of the skin can be effectively avoided, the generation of mechanical phlebitis can be greatly reduced, the incidence of complications is reduced, and the use comfort of a patient is increased.

Example 2

A venous indwelling needle for low-level puncture comprises a positive pressure joint, an extension tube, a single-hand clamp and a needle head, wherein the needle head is arranged at one end of the extension tube, the positive pressure joint is arranged at the other end of the extension tube, and the single-hand clamp is arranged on the extension tube; the needle head comprises a catheter 3, a needle holding handle, a needle core 4 and a needle handle 1, wherein the surface of the needle handle, which is attached to the skin, is a plane; the width of the longitudinal section of the needle handle 1 is gradually reduced along the thickness direction of the needle handle 1, the needle handle 1 is of a hollow structure and is internally provided with an isolating plug 11, and the head end of the needle handle 1 is fixedly connected with the catheter 3; the needle core 4 is fixed at the head end of the needle holding handle and is positioned in the hollow needle handle 1, and the needle core 4 passes through the isolating plug 11 and is positioned in the catheter 3; the catheter 3 is positioned at the lower center of the needle handle 1 in the thickness direction, in particular the catheter 3 is positioned at the position one third away from the bottom surface of the needle handle 1; the extension tube is arranged on the upper side of the needle handle 1 through the fixed tube 2, and the axial included angle between the fixed tube 2 and the needle handle 1 is 15 degrees.

The needle holding handle comprises needle holding wings 5 and fixing buttons 6, the fixing buttons 6 are arranged at the tail end of the needle handle 1, the fixing buttons 6 are fixedly connected with the needle core 4, the two needle holding wings 5 are symmetrically arranged on two sides of the needle handle 1, the needle holding wings 5 are arranged on the needle handle 1 in a sliding mode along the axial direction of the needle handle 1, specifically, sliding grooves are formed in the outer portion of the needle handle, and a dovetail structure is arranged on one side, connected with the needle handle, of each needle holding wing, so that sliding clamping is achieved; in addition, the two needle holding wings 5 are movably connected through a fixed button 6; the provision of two symmetrically arranged needle-holding wings 5 is convenient for operators of different usage habits (left-handed or right-handed).

When the device is specifically implemented, the outer wall of the fixing button is provided with anti-skid lines, so that the adjustment stability is improved; in addition, a through hole is arranged on the fixing button 6, a connecting rod 7 is movably arranged in the through hole, fixing rings 51 which are in inserted fit with the connecting rod 7 are arranged on the two needle holding wings 5, and the two fixing rings 51 and the fixing button 6 are connected through the connecting rod 7; two ends of the connecting rod 7 are respectively provided with a one-way petal-shaped structure 71 for preventing the connecting rod 7 from slipping off, and the opening ends of the two one-way petal-shaped structures 71 are respectively arranged towards the outside of the connecting rod 7; the connecting rod 7 can be movably arranged in the inner ring of the fixing ring within a preset range, wherein the inner diameter of the fixing ring is slightly larger than the rod diameter of the connecting rod, so that the fixing button can rotate within a small range, the purpose of loosening the needle core is realized, and the subsequent operation of withdrawing the needle core is facilitated.

The procedure for using the low-level puncture venous indwelling needle of the present embodiment will be described below, taking an operator who uses the right hand as an example: firstly, checking whether the connecting rod is positioned in the two fixing rings, starting needle inserting operation after checking, holding the needle holding wing positioned on the right side by the right hand of an operator to insert the needle, pushing the connecting rod to the left side after needle inserting is finished, easily releasing the connecting rod from the right fixing ring under the action of the one-way petal-shaped structure, and then holding the left needle holding wing by the left hand to withdraw the needle core; the right needle holding wing can be taken down or not taken down; the sticking film is stuck outside the needle handle and is stuck with the skin, and the side of the needle handle close to the skin is a plane, so that the mechanical pressing injury of the conical needle handle to the skin is avoided, the generation of mechanical phlebitis can be greatly reduced, the incidence of complications is reduced, and the use comfort of a patient is increased.

The present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent changes and substitutions without departing from the principle of the present invention after learning the content of the present invention, and these equivalent changes and substitutions should be considered as belonging to the protection scope of the present invention.

Claims

1. A venous indwelling needle for low-level puncture comprises a positive pressure joint, an extension tube, a single-hand clamp and a needle head, wherein the needle head is arranged at one end of the extension tube, the positive pressure joint is arranged at the other end of the extension tube, and the single-hand clamp is arranged on the extension tube; the method is characterized in that: the needle head comprises a catheter, a needle holding handle, a needle core and a needle handle, wherein the surface of the needle handle, which is attached to the skin, is a plane; the width of the longitudinal section of the needle handle is gradually reduced along the thickness direction of the needle handle, the needle handle is of a hollow structure and is internally provided with an isolating plug, and the head end of the needle handle is fixedly connected with the catheter; the needle core is fixed at the head end of the needle holding handle and is positioned in the hollow needle handle, and the needle core penetrates through the isolating plug and is positioned in the catheter; the catheter is positioned at the center of the needle handle in the thickness direction and is positioned at the lower position.

2. The low plane puncture venous indwelling needle of claim 1, wherein: the catheter is positioned one third from the bottom surface of the needle handle.

3. The low plane puncture venous indwelling needle of claim 1 or claim 2, wherein: hold the needle handle including holding the needle wing and fixed button, fixed button establishes at the end of needle handle, and fixed button and nook closing member fixed connection.

4. The low plane puncture venous indwelling needle of claim 3, wherein: the needle holding wings are arranged on the needle handle in a sliding and radial rotating mode along the axial direction of the needle handle, and the needle holding wings are movably connected through fixing buttons.

5. The low plane puncture venous indwelling needle of claim 3, wherein: the needle holding wings are arranged on two sides of the needle handle symmetrically, the needle holding wings are arranged on the needle handle in a sliding mode along the axial direction of the needle handle, and the two needle holding wings are movably connected through a fixing button.

6. The low plane puncture venous indwelling needle of claim 5, wherein: the needle wing fixing device is characterized in that a through hole is formed in the fixing button, a connecting rod is movably arranged in the through hole, fixing rings which are matched with the connecting rod in an inserting and embedding mode are arranged on the two needle wings, and the fixing rings and the fixing button are connected through the connecting rod.

7. The low plane puncture venous indwelling needle of claim 6, wherein: the connecting rod both ends all are equipped with the one-way lamella column structure that prevents the connecting rod slippage, and the open end of two one-way lamella column structures all sets up outward towards the connecting rod.

8. The low plane puncture venous indwelling needle of claim 6, wherein: the connecting rod can be movably arranged in the inner ring of the fixing ring within a preset range.

9. The low plane puncture venous indwelling needle of claim 3 or 8, wherein: the extension pipe is established the upside at the needle handle structure through fixed pipe, and just fixed pipe is 15 ~ 30 with the axial contained angle of needle handle.