Automatically-sealed thrombus-prevented venous indwelling needle and use method thereof

Abstract

The invention discloses an automatically-sealed thrombus-prevented venous indwelling needle and a use method thereof. The automatically-sealed thrombus-prevented venous indwelling needle comprises a needle base, a catheter and a puncture needle core, wherein the catheter is arranged at the front end of the needle base, and the puncture needle core axially penetrates through the needle base and the catheter; the internal cavity of the needle base is separated into a positive-pressure chamber and a transfusion chamber by a separation portion, the transfusion chamber is communicated with the catheter, and the separation portion is made from a medical sealing material; and the separation portion is provided with a seepage passage, so that liquid in the positive-pressure chamber can automatically and slowly flow into the transfusion chamber through the seepage passage when the positive-pressure chamber and the transfusion chamber have pressure difference. The automatically-sealed thrombus-prevented venous indwelling needle and the use method of the automatically-sealed thrombus-prevented venous indwelling needle have the beneficial technical effects that the catheter is sealed automatically when transfusion is suspended according to conventional operations, and the liquid in the positive-pressure chamber slowly flows into the transfusion chamber through the seepage passage; and the seepage speed is slowed down along with the reducing of the pressure difference between the positive-pressure chamber and the transfusion chamber, so that the positive-pressure chamber can maintain positive pressure for a long time.

Description

technical field [0001] The invention relates to a medical instrument for injecting a medium into a human body, in particular to an indwelling needle used for infusion for a patient and a usage method thereof. Background technique [0002] The invention and application of intravenous indwelling needles relieve patients' pain and improve the quality of medical care, and also reduce the labor intensity of medical staff for infusion for patients. However, the existing venous indwelling needle must be sealed when the infusion is suspended, and the tube must be flushed every 6-8 hours, otherwise thrombus will be formed to cause blockage and vasculitis; The operation of locking, flushing and passing the tube increases the economic burden of the patient and the workload of the medical staff, and may also cause the formed thrombus to enter the blood vessel and cause other diseases. The sodium heparin used in the sealing, flushing and passing of the tube Anticoagulant drugs such as u...

AI Technical Summary

Problems solved by technology

The antithrombotic device of the venous indwelling needle is a device with better antithrombotic effect for the venous indwelling needle at present, but the structure and process of the device are relatively complicated, which makes the production cost higher; The speed and force of the tube will affect the effect of sealing the tube, and the piston may vibrate and cause the internal pressure to change, resulting in the failure of the antithrombotic effect

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