CN201564870U - Indwelling needle for intravenous infusion - Google Patents

Abstract

The utility model belongs to a medical infusion device, in particular to an indwelling needle for intravenous infusion, comprising a soft indwelling tube, an infusion connection tube connected with the soft indwelling tube and a rubber plug located in the cavity at the end of the soft indwelling tube. The front end wall of the soft indwelling tube is provided with liquid side outlet holes at a distance of 1mm to 5mm from the front end port. Multiple liquid side outlet holes can decompose the liquid output pressure at the front end port of the soft indwelling tube from different directions. The structure is simple and practical, and it solves the problem. In the process of intravenous infusion, the problem of high pressure on the blood vessel wall caused by fast injection speed can be solved, and the pain at the injection site and the damage of the blood vessel wall can be alleviated.

Description

Indwelling needle for intravenous infusion

technical field

The utility model belongs to a medical infusion device, in particular to an indwelling needle for intravenous infusion.

Background technique

Current medical indwelling needles for intravenous infusion generally include infusion indwelling tubes made of non-toxic plastic soft materials, which are directly left inside as infusion tubes after they are brought into human blood vessels by steel needles. In various gravity or pressure intravenous infusion processes, such as using a high-pressure syringe to inject contrast media into the human body, the usual injection speed is 2-4 ml per second, especially during perfusion, the general injection speed is 6 ml per second , even up to 8 ml per second, such a fast injection speed will generate greater pressure on the blood vessel wall, which will easily cause vascular damage and local pain in patients, especially for patients with repeated intravenous injections. It is necessary to improve the existing indwelling needle for intravenous infusion due to the pain at the site and the damage of the blood vessel wall.

Utility model content

In order to solve the problem of greater pressure on the blood vessel wall caused by fast injection speed during the intravenous infusion process, and reduce the technical problem of pain at the injection site and damage to the blood vessel wall, the utility model adopts the following technical scheme, that is, provides an intravenous infusion The indwelling needle includes a soft indwelling tube, an infusion connection tube connected to the soft indwelling tube, and a rubber plug located in the cavity at the end of the soft indwelling tube. There is a liquid side outlet hole.

When the liquid is transported into the human body, if the pressure is high, if the pressure is not reduced, the impact force of the liquid concentrated in one direction will make the inner wall of the patient's venous vessel suffer a greater impact force, resulting in blood vessel damage and local pain in the patient, especially It is more serious for patients with repeated intravenous injections. Different from the existing indwelling tubes, the indwelling needle for intravenous infusion provided by the utility model is provided with a liquid side outlet hole at a distance of 1 mm to 5 mm from the front end port on the front end wall of the soft indwelling tube, and the side outlet hole can divert the injected liquid, Greatly reduce the impact of the input liquid on the local blood vessel wall, and reduce the damage to the blood vessel and local pain of the patient. And there is a certain distance between the outlet hole on the liquid side and the front end port of the soft indwelling tube, which is to prevent the liquid side outlet hole from being close to the local position of the front port of the soft indwelling tube when it is subjected to a large pressure during the infusion process. The patient's vascular injury and local pain; at the same time, if the liquid side outlet hole is set at the rear, the side outlet hole is likely to stay outside the human blood vessel, and the infused liquid cannot be completely input into the blood vessel, which is obviously inappropriate.

Further, on the basis of the above design, multiple liquid side outlet holes can be set on the tube wall at the front end of the soft indwelling tube to decompose the injection pressure as much as possible.

Further, the multiple liquid-side outlet holes are arranged in a staggered manner on the wall of the indwelling tube, that is, the multiple liquid-side outlet holes are not arranged along a straight line parallel to the centerline of the soft indwelling tube, nor are they arranged along a straight line parallel to the centerline of the soft indwelling tube The central lines are vertically distributed and arranged on the same circumferential plane, which can decompose the pressure on the blood vessel wall from different directions and prevent the local blood vessel wall from being subject to strong resonance pressure.

Obviously, the more holes on the liquid side, the better the pressure distribution, and the smaller the diameter of the holes on the liquid side, the smaller the pressure on the local blood vessels. Therefore, it is further restricted that the diameter of the outlet hole on the liquid side is half the diameter of the front end port of the soft indwelling tube.

The utility model uses a plurality of liquid side outlet holes to decompose the liquid output pressure at the front end port of the soft indwelling tube from different directions. Compared with the existing technical scheme, the utility model can reduce the pain at the injection site and the damage of the blood vessel wall, and is simple and practical.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further elaborated:

Fig. 1 is a kind of schematic diagram of intravenous indwelling tube provided by the utility model;

FIG. 2 is an enlarged schematic view of A in FIG. 1 .

Detailed ways

As shown in Figure 1 and Figure 2, the utility model provides an indwelling needle for intravenous infusion, which includes a soft indwelling tube 1, an infusion connection tube 2 communicating with the soft indwelling tube 1 and a cavity at the end of the soft indwelling tube 1 The rubber plug 3 of the soft indwelling tube 1 is provided with three liquid side outlet holes 4 at a distance of 1mm from the front end port on the front end of the soft indwelling tube 1. In half, the three liquid-side outlet holes 4 are staggered around the front end wall of the soft indwelling tube 1 .

The above is only the preferred embodiment of the utility model, and it should be pointed out that for those skilled in the art, some deformations and improvements can be made without departing from the structure of the utility model, such as the side outlet hole 4 The setting position can be 1 mm, 5 mm, or 3 mm from the front end port on the front end of the soft indwelling tube 1; the diameter and number of the liquid side outlet holes 4 can also be appropriately set, and these should also be regarded as this Protection scope of utility model.

Claims (4)

1. An indwelling needle for intravenous infusion, comprising a soft indwelling tube (1), an infusion connection tube (2) communicated with the soft indwelling tube (1) and a rubber plug located in the cavity at the end of the soft indwelling tube (1) The head (3) is characterized in that: the front end wall of the soft indwelling tube (1) is provided with a liquid side outlet hole (4) at a distance of 1 mm to 5 mm from the front end port. 2. The indwelling needle for intravenous infusion according to claim 1, characterized in that there are multiple liquid side outlet holes (4). 3. The indwelling needle for intravenous infusion according to claim 2, characterized in that: the plurality of liquid side outlet holes (4) are arranged in a staggered manner on the wall of the indwelling tube (1). 4. The indwelling needle for intravenous infusion according to claim 1, 2 or 3, characterized in that: the diameter of the liquid side outlet hole (4) is half of the diameter of the front end port of the soft indwelling tube (1) .

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