CN203539792U - Double-cavity venous indwelling needle - Google Patents

Abstract

The utility model relates to a medical device, in particular to a double-vena cava indwelling needle. It includes a cannula and a needle core, and the front outer wall of the cannula is provided with a butterfly wing; the cannula includes a main lumen and an auxiliary lumen, and the main body of the auxiliary lumen is attached to the main body of the main lumen , into one body; the needle core is set in the main lumen. The utility model can not only meet the application of inpatient fluid management and perioperative venous channel establishment, but also reduce the patient's pain, and can also save nursing costs and patient expenses. Moreover, compared with the central venous access with higher risk, the utility model It can better protect the safety of patients.

Description

double vena cava catheter

technical field

The utility model relates to a medical device, in particular to a double-vena cava indwelling needle.

Background technique

In clinical work, infusions in wards, especially intraoperative infusions, often require multiple drugs to be applied at the same time, and some drugs cannot be applied in the same channel due to different pH values or unknown combined effects. This requires opening multiple venous accesses, which not only increases nursing Work increases the pain of the patient, and sometimes it is difficult to establish multiple venous accesses because of individual patient differences.

In addition, with the improvement of medical conditions, more and more patients are indwelling intravenous analgesic pumps after surgery. Intravenous analgesic pumps require continuous infusion of a certain amount of fluid to maintain a stable blood concentration, and fluid management for postoperative patients cannot achieve continuous infusion for 24 hours. Therefore, the effect of intravenous analgesia is often uncertain. In addition, in clinical trials, it was found that through the three-way catheter and liquid infusion to implement intravenous analgesia, due to the influence of liquid on the opening pressure of the analgesic pump, there is a significant difference between the output rate of the analgesic pump liquid and the output of the analgesic pump alone. discrepancy, which is very detrimental to pain management and safety goals in critically ill patients.

Utility model content

The purpose of the utility model is to provide a double-vena cava indwelling needle to solve the above technical problems.

In order to achieve the above object, the technical solution adopted in the utility model is:

A double-cavity venous indwelling needle, comprising a cannula and a needle core, the front outer wall of the cannula is provided with a butterfly wing; it is characterized in that: the cannula includes a main lumen and an auxiliary lumen, and the auxiliary lumen The main body of the main lumen is attached to the main body of the main lumen to form a whole; the needle core is arranged in the main lumen.

As an improvement of the above technical solution: the tube body of the liquid inlet part of the auxiliary lumen tube is separated from the tube body of the main lumen tube liquid inlet part in a Y shape; the liquid inlet port of the auxiliary lumen tube is set There are sub-chamber end caps.

As another improvement of the above technical solution: the liquid inlet end of the auxiliary lumen is connected with a medical plastic hose, and the medical plastic hose is separated from the body of the liquid inlet end of the main lumen, and the medical plastic hose The liquid inlet port of the hose is provided with an auxiliary cavity end cap.

Further on:

The inner diameter of the main lumen is 0.7mm, 0.9mm, 1.1mm or 1.3mm; the inner diameter of the auxiliary lumen is 0.7mm.

The overall length of the indwelling needle is 19mm, 25mm or 32mm.

Beneficial effects: compared with the prior art, the utility model has a simple structure and a reasonable design. Using the double-cavity vein indwelling needle described in the utility model during preoperative puncture not only facilitates intraoperative anesthesia medication, but also can be indwelling after the operation. A special pipeline is used to connect the intravenous analgesic pump, so as to ensure stable analgesic output and achieve the purpose of continuous and constant analgesia. Therefore, the utility model can not only meet the application of inpatient fluid management and perioperative venous channel establishment, but also reduce the pain of patients, and save nursing costs and patient expenses. Moreover, compared with the central venous access with higher risk, this The utility model can better guarantee the safety of patients.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment 1;

Fig. 2 is a schematic structural view of Embodiment 2 of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Example 1:

Referring to FIG. 1 , the double-caval indwelling needle described in this embodiment includes a cannula and a needle core 3 , and a butterfly wing 4 is provided on the front outer wall of the cannula. The cannula includes a main lumen 1 and an auxiliary lumen 2 , and the needle core 3 is arranged in the main lumen 1 . The main body of the auxiliary lumen 2 is attached to the main body of the main lumen 1 to form one body, and the body of the liquid inlet part of the auxiliary lumen 2 is connected with the pipe of the liquid inlet part of the main lumen 1. The body is separated from each other and is in a Y shape; the liquid inlet port of the auxiliary lumen tube 2 is provided with an end cap 5 of the auxiliary lumen.

Example 2:

Referring to FIG. 2 , the double-caval indwelling needle described in this embodiment includes a cannula and a needle core 3 , and a butterfly wing 4 is provided on the front outer wall of the cannula. The cannula includes a main lumen 1 and an auxiliary lumen 2 , and the needle core 3 is arranged in the main lumen 1 . The main body of the auxiliary lumen 2 is attached to the main body of the main lumen 1 to form a whole. The liquid inlet end of the auxiliary cavity tube 2 is connected with a medical plastic hose 6, and the medical plastic hose 6 is separated from the body of the liquid inlet end of the main cavity tube 1, and at the liquid inlet of the medical plastic hose 6 The port is provided with a sub-cavity end cap 5 .

The double-cavity vein indwelling needle described in the utility model mainly has the following four specifications:

(1) The inner diameter of the main lumen 1 is 0.7mm, the inner diameter of the auxiliary lumen 2 is 0.7mm, the overall length is 19mm, and the normal maximum flow rate is 21ml/min;

(2) The inner diameter of the main lumen 1 is 0.9mm, the inner diameter of the auxiliary lumen 2 is 0.7mm, the overall length is 25mm, and the normal maximum flow rate is 35ml/min;

(3) The inner diameter of the main lumen 1 is 1.1mm, the inner diameter of the auxiliary lumen 2 is 0.7mm, the overall length is 32mm, and the normal maximum flow rate is 60ml/min;

(4) The inner diameter of the main lumen 1 is 1.3mm, the inner diameter of the auxiliary lumen 2 is 0.7mm, the overall length is 32mm, and the normal maximum flow rate is 105ml/min.

Claims (5)

1. A double-cavity venous indwelling needle, including a cannula and a needle core (3), and a butterfly wing (4) is provided on the front outer wall of the cannula; it is characterized in that: the cannula includes a main lumen (1 ) and the auxiliary lumen (2), the main body of the auxiliary lumen (2) is attached to the main body of the main lumen (1) and become one; the needle core (3) is set on the main lumen (1) )Inside. 2. The double-cavity venous indwelling needle according to claim 1, characterized in that: the tube body of the liquid inlet part of the auxiliary lumen tube (2) and the tube body of the liquid inlet part of the main lumen tube (1) are mutually separated in a Y shape; the liquid inlet port of the auxiliary lumen (2) is provided with an end cap (5) of the auxiliary lumen. 3. The double-cavity venous indwelling needle according to claim 1, characterized in that: the liquid inlet end of the auxiliary lumen (2) is connected with a medical plastic hose (6), and the medical plastic hose (6) The tube body at the liquid inlet end of the main lumen (1) is separated from each other, and an auxiliary lumen end cap (5) is provided at the liquid inlet port of the medical plastic hose (6). 4. The double-cavity venous indwelling needle according to claim 2 or 3, characterized in that: the inner diameter of the main lumen (1) is 0.7mm, 0.9mm, 1.1mm or 1.3mm; the auxiliary lumen (1) 2) The inner diameter is 0.7mm. 5. The indwelling needle for double-caval vein according to claim 4, characterized in that: the overall length of the indwelling needle is 19mm, 25mm or 32mm.

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