A syringe and an auxiliary dosing device for the syringe

Abstract

The present application relates to syringes and auxiliary dosing devices for syringes. An auxiliary dosing device for a syringe includes a plunger rod having a proximal end and a distal end; and a dosing snap ring sleeving the outer periphery of the plunger rod and moving along the axial direction of the plunger rod. The dosing snap ring is configured to be circumferentially rotatable relative tothe plunger rod from a first position to a second position. As the dosing snap ring is circumferentially rotated from the first position to the second position, the plunger rod is capable of moving adistance in an axial direction relative to the meter snap ring in a distal direction.

Description

technical field [0001] The present application relates to syringes, and more particularly to auxiliary dosing devices for syringes. Background technique [0002] Traditional syringes are usually provided with a dose marking line on the barrel, and the medical personnel use the naked eye to make the distal end of the plunger align with the corresponding dose marking line on the barrel before and after injection, so as to provide the patient with the required injection dose. However, due to factors such as viewing angles and light intensity, it is difficult for medical staff to accurately locate the distal end of the plunger so that it aligns with the corresponding dose marking line, resulting in inaccurate injection doses. Especially for small-volume syringes, such as ophthalmic syringes, where the required injection volume is usually only about 0.1 ml or less, however, the conventional syringe dose marking line is at least 0.1 ml, and the injection of less than 0.1 ml canno...

AI Technical Summary

Problems solved by technology

However, due to the influence of factors such as viewing angle and light intensity, it is difficult for medical staff to accurately locate the distal end of the plunger to align it with the corresponding dose marking line, resulting in inaccurate injection doses

Especially for small-volume syringes, such as ophthalmic syringes, where the required injection volume is usually only about 0.1 ml or less, however, the conventional syringe dose marking line is at least 0.1 ml, and the injection of less than 0.1 ml cannot be achieved by human eye control alone dose

In view of the fact that traditional syringes cannot achieve precise injection, especially the precise injection of small doses, there is an urgent need in this field for a syringe and an auxiliary dosing device that can accurately control the injection dose

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