Needleless gravity-compression fluid infusion and blood transfusion safety device

Abstract

The invention provides a needleless gravity-compression fluid infusion and blood transfusion safety device, which comprises a pushing device which is provided with a pushing rod for compressing a spring and storing elastic force; a piston is arranged in a positive-pressure drum device; the piston is fixedly arranged at one end of the spring; and the spring stretches, the elastic force is released to push the piston, so that liquid is compressed for conducting gravity-compression fluid infusion or blood transfusion.

Description

technical field [0001] The invention relates to a safety device for gravity pressurized needle-free infusion and blood transfusion, especially a needle-free connecting piece for positive pressure in the follow-up operation of an infusion set or a syringe to automatically push the drug solution into the patient without sealing. Tube or change the tube, so that the indwelling needle always maintain a certain drug delivery pressure until the liquid medicine is completely released, so as to greatly reduce the blockage in the needle tube, the trouble of pulling out the needle tube again and reduce the heavy working pressure of the medical staff. Background technique [0002] In modern medicine, it is normal to use injection and infusion for treatment. The existing positive pressure needleless connection components include a valve housing, a valve column, a spring, and a valve seat. When in use, positive pressure can be generated when the infusion set or syringe is pulled out, whi...

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Problems solved by technology

[0004] Although the intention of this patent case is good, there are still many shortcomings in the poor design of the needleless connector. When filling the inner shell 21 of the positive pressure element, only the one-way valve port 23 on the top of the positive pressure element is used to fill the liquid medicine. Since the inner shell 21 of the positive pressure element is in a vacuum state, the resistance of the gravity spring 22 in the huge spring chamber is quite large. , because it is necessary to overcome the vacuum reaction force on the one hand, and to overcome the reaction of the gravity spring 22 on the other hand, it is quite difficult to inject the liquid medicine from the one-way valve port when the caliber of the one-way valve port does not compare with the caliber of the inner shell of the positive pressure part. , and the operation time is quite long as its maximum missing

[0005] Furthermore, between the positive pressure member and the spool 12, the medicinal solution is drip-injected at a slow rate of 5-10 drops per minute by the capillary 24, which is not suitable for rapid blood transfusion for emergency blood transfusion patients, and the speed of its transfusion It cannot be adjusted, so its use is greatly restricted, and it needs to be improved

[0006] In view of the shortcomings in the use of existing safety sheath structures such as syringes and the unsatisfactory fact in their structural design, the present inventor started to develop its solution, and the inventor hoped to develop a more stable and safe The safety structure of gravity pressurized needle-free infusion and blood transfusion that is safe and in line with manufacturing economic benefits, in order to serve the public and promote the development of this industry, was born after a long time of conception

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