CN217339620U - A special syringe for maintenance of infusion port - Google Patents

Abstract

The utility model discloses a special syringe for maintenance of an infusion port, which comprises a syringe, a capacity cavity is formed in the syringe, a piston is sealed in the capacity cavity, and an injection head is formed at the end of the capacity cavity , the detachable connection on the injection head has no damage needle. The needle head of the atraumatic needle is a curved tube-shaped needle tip, and the needle tip is provided with a side opening. Compared with the infusion port maintenance equipment in the prior art, the utility model saves the structure of the extension pipe and the connecting head, simplifies the structure, saves the production material, and can realize the control of the production cost; because the extension pipe is saved As well as other structures connected on the extension pipe, the maintenance process of the infusion port is simplified, which is convenient for medical personnel to use, and improves the maintenance efficiency.

Description

A special syringe for maintenance of infusion port

technical field

The utility model relates to the technical field of medical devices, in particular to a special syringe for maintenance of an infusion port.

Background technique

Totally Implantable Venous Access Port (TIVAP), referred to as the infusion port (Port), is a fully implanted intravenous infusion system embedded in the human body, consisting of a central venous catheter and an injection seat , the tip of the catheter reaches the junction of the superior vena cava and the right atrium, the tail of the catheter is connected to the injection seat, and the whole device is completely subcutaneous. Because of its advantages of reducing the number of punctures, protecting the peripheral blood vessels of patients, reducing the pain of patients, long indwelling time, beautiful appearance and comfort, it is more and more widely used in clinical patients. Atraumatic needles should be used with any kind of implantable infusion port. The needle of the non-damaging needle is specially treated, similar to the side hole needle. When puncturing the needle seat, it will not "cut" the silicone septum, ensuring that it can withstand thousands of punctures without damaging the septum and causing leakage. Any kind of implantable infusion port An atraumatic needle should be used.

The PORT uses an atraumatic needle to pass through the skin, the septum of the injection seat to the administration pot when infusion is required, and then connect to the infusion set for infusion.

Intervals when not in use need to be maintained once a month to maintain patency and prevent catheter blockage: that is, use a non-invasive needle through the skin, the septum of the injection seat to the dosing pot, and then connect the syringe to inject normal saline in the required method .

As shown in FIG. 1 , both the non-damaged needles used for infusion and the non-damaged needles 5 used for maintenance on the market are connected with an extension tube 6 at the end of the needle, and then the extension tube is connected to the infusion through the connector 7 Infusion or syringe bolus of saline for maintenance. This adds to the cost of maintenance, since atraumatic needles with extension tubes are more expensive, and it is also inconvenient to operate, requiring separate syringes to aspirate saline or the use of prefilled syringes.

Utility model content

In order to solve the above problems, the present invention provides a special syringe for maintenance of an infusion port, including a syringe barrel, a capacity cavity is formed in the syringe barrel, a piston is sealed in the capacity cavity, and the end of the capacity cavity is sealed. An injection head is formed on the injection head, and a damage-free needle is detachably connected to the injection head.

Furthermore, the atraumatic needle is snap-connected to the injection head through a needle plug.

Further, the syringe barrel is provided with a volume scale.

Further, the piston includes a piston shaft, a piston head connected to one end of the piston shaft, and a piston handle connected to the other end of the piston shaft.

Further, the needle head of the atraumatic needle is a curved tube-shaped needle tip, and the needle tip is provided with a side opening.

The beneficial effects of the utility model are: compared with the infusion port maintenance equipment in the prior art, the utility model saves the structure of the extension pipe and the connecting head, simplifies the structure, saves the production materials, and can realize the production cost. Because the extension pipe and other structures connected on the extension pipe are saved, the maintenance process of the infusion port is simplified, which is convenient for medical personnel to use and improves the maintenance efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some implementations of the present invention. For example, for those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is the structural representation of the non-damaged needle in the prior art;

Fig. 2 is one of the three-dimensional structure schematic diagrams of the present utility model;

Fig. 3 is the structure exploded view of the present utility model;

Fig. 4 is the second three-dimensional structure schematic diagram of the present utility model;

Fig. 5 is the partial enlarged view of A place in Fig. 4;

Fig. 6 is the puncture schematic diagram of the needle of the prior art;

FIG. 7 is a schematic diagram of the puncture of the needle of the present invention.

Detailed ways

The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict. For the convenience of description, the words "up", "down", "left" and "right" appear in the following text, which only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure.

As shown in FIG. 2-FIG. 5, the present utility model proposes a special syringe for maintenance of the infusion port, including a syringe barrel 3, a capacity cavity is formed in the syringe barrel 3, and a piston 1 is sealed in the capacity cavity. , an injection head 32 is formed at the end of the capacity cavity, and a damage-free needle 5 is detachably connected to the injection head 32 . The capacity cavity is used to store the liquid to be delivered, and the shape of the capacity cavity is preferably a cylindrical cavity.

The non-damaged needle 5 in this embodiment is connected to the injection head 32 by engaging with the needle plug 4 .

The syringe barrel 3 in this embodiment is provided with a volume scale 31 . The maximum value of the volume scale 31 in this embodiment is preferably 10 ml.

The piston 1 in this embodiment includes a piston shaft, a piston head 2 connected to one end of the piston shaft, and a piston handle 12 connected to the other end of the piston shaft. The piston head 2 is mounted on the piston shaft by engaging with the mounting post 11 . The piston head 2 is preferably made of silica gel, and its diameter is slightly larger than the diameter of the capacity chamber, so that the circumferential direction of the piston head 2 closely fits the inner surface of the capacity chamber to achieve sealing.

The needle head of the non-damaged needle 5 in this embodiment is a curved needle tip 51 , and a side opening 52 is provided on the needle tip. The characteristic of the non-invasive needle is that it contains a turning point. The bevel of the needle is longer and the angle is smaller than that of ordinary needles, which can avoid the core effect, that is, the bevel of the needle will not cut the puncture diaphragm of the infusion port injection seat, preventing damage to the puncture diaphragm. Leakage and cut particles may block the catheter, and the number of punctures of the injection seat can reach 2,000 to 3,000 times, while ordinary hypodermic needles may cause damage to the puncture membrane.

The use steps of the utility model are as follows: the infusion port is an intravenous infusion device completely implanted in the body, which can provide a reliable venous access for patients who need long-term infusion, and has the advantages of low infection risk, convenient maintenance, and long service life. In each use or maintenance, it is necessary to pierce the local skin with a dedicated non-invasive needle for the infusion port to connect with the hypodermic seat. The user first holds the syringe 3 with one hand, places the injection head 32 in the physiological saline, and pulls the piston 1 with the other hand, so that a certain amount of physiological saline is inhaled into the syringe 3 . Then, the atraumatic needle 5 is mounted on the injection head 32, the atraumatic needle 5 is passed through the skin, and a physiological saline is injected. During injection, the pulse injection method can be used to control the flow rate of the infusion. Complete maintenance of the infusion port. As shown in Figure 6 and Figure 7, taking the needle tip puncturing the silicone septum 8 on the injection seat as an example, compared with the general needle tip, the needle of the non-damaged needle has undergone special treatment, similar to the side hole needle, and will not "cut" when puncturing the needle seat "Silicone diaphragm 8, to ensure that it can withstand thousands of punctures without damaging the diaphragm 8 and causing leakage.

Because the needle tip of the non-damaged needle is a specially designed bevel, there is a reversal point about 0.5cm away from the needle tip, so that when the needle body has a radian of about 150 radians, the resistance of the injection seat is relatively large, and the operator exerts too much force and is too violent. The hand holding the needle will rebound involuntarily, stab the hand that fixes the injection seat, and sometimes scratch the patient's skin and cause needle stick injuries. Therefore, after the maintenance is completed, the two-step needle extraction method is generally adopted for the needle extraction without damage: the first step is to fix the injection seat with the thumb, index finger and middle finger of the left hand, and the injection seat is fixed by taut skin; the root of the right palm is close to the patient's chest wall, and the right Hold the syringe 3 firmly with the thumb and index finger, and use the strength of the wrist to slowly pull out the needle 0.5cm and pause for a while to eliminate inertia. The second step is to slowly pull out the non-damaged needle according to the curvature of the needle body.

The above are only the embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and accompanying drawings of the present invention, or directly or indirectly applied to other Relevant technical fields are similarly included in the scope of patent protection of the present invention.

Claims (4)

1. A special syringe for infusion port maintenance, characterized in that it comprises a syringe, a capacity chamber is formed in the syringe, a piston is sealed in the capacity chamber, and an injection is formed at the end of the capacity chamber. The injection head is detachably connected with a non-damaged needle, the needle of the non-damaged needle is a curved tube-shaped needle tip, and the needle tip is provided with a side opening. 2 . The special syringe for maintenance of an infusion port according to claim 1 , wherein the non-damaged needle is connected with the injection head by means of a needle plug. 3 . 3 . The special syringe for infusion port maintenance according to claim 2 , wherein the syringe barrel is provided with a volume scale. 4 . 4 . The special syringe for infusion port maintenance according to claim 3 , wherein the piston comprises a piston shaft, a piston head connected to one end of the piston shaft, and a piston handle connected to the other end of the piston shaft. 5 .

Images