Portable low-residue blood-return-proof pre-flushing type disinfection syringe

Abstract

The invention discloses a portable low-residue blood-return-proof pre-flushing type disinfection syringe. The syringe comprises a cap (1), a jacket (2), flushing liquid (3), a plunger (4), a core rod (5) and a disinfection connection cap (6). The flushing liquid (3) is prefilled in the syringe, and when the core rod (5) pushes the plunger (4) to the bottom end of the jacket (2), a pin (42) of the plunger (4) is inserted into a 6:100 inner hole (22) of the jacket (2) to realize taper interference fit. In clinical application of the portable low-residue blood-return-proof pre-flushing type disinfection syringe, tubes of indwelling needles, PICCs (peripherally inserted central catheters), CVCs (central venous catheters), implantable venous access ports and the like of patients can be directly flushed and sealed without extraction, and medicine residues in the pre-flushing type syringe can be reduced to the greatest extent, so that liquid medicine waste is reduced, liquid medicine utilization rate is increased, and the syringe is especially high in value for expensive medicines or medicines high in dosage requirement. The portable low-residue blood-return-proof pre-flushing type disinfection syringe has the advantages of novel structural conception, economy, practicality, convenience for medical workers to operate, simplification of normal operation process, increase of the liquid medicine utilization rate and convenience in clinical promotion and application.

Description

technical field [0001] The product of the invention belongs to the technical field of medical devices, is a combination of medicines and devices, and in particular relates to a sterilized portable pre-flushed syringe that prevents blood return and has less residue. technical background [0002] After indwelling needles, PICCs, CVCs, implanted infusion ports and other pipelines are used for infusion or in the gaps between different drug treatments, the tubes need to be sealed or flushed to avoid blood return. Incompatibility between drugs. The piston of the conventional pre-flush flushing syringe is in the shape of a circular arc, and the piston is only in the hollow of the outer medicine, and cannot extend into the inner hole of the outer jacket 6:100, so the inner hole here becomes a dead space for storing the medicinal solution. When the external force on the core rod is removed, due to the elastic force generated when the piston deforms and recovers, the liquid medicine ...

AI Technical Summary

Problems solved by technology

The piston of the conventional pre-flush flushing syringe is in the shape of a circular arc, and the piston is only in the hollow of the outer medicine, and cannot extend into the inner hole of the outer jacket 6:100, so the inner hole here becomes a dead space for storing the medicinal solution. When the external force on the core rod is removed, due to the elastic force generated when the piston deforms and recovers, the liquid medicine will flow back, which will easily cause blood backflow, increase the risk of blood coagulation in the pipeline, and cause harm to patients

[0003] After sealing or flushing the needle-free infusion interface in the indwelling needle, PICC, CVC, implanted infusion port and other pipelines, the needle-free infusion interface will be exposed to the air, and will not be sealed and protected in a sterile or relatively clean state. It is easy to cause infection, which is neither safe nor convenient; when re-treatment is used, it is necessary to use disinfectant to strictly disinfect and wipe the needle-free infusion interface before use; and before each treatment, medical staff need to spend a lot of money. Time-consuming and labor-intensive disinfection of the needle-free infusion port

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