Based on analysis and conducted measurements some exceedances on parameter responsible for correct connections between safety needle and syringe were observed, but a reason of defect can be unrelated to the manufacture.A reason of correct connections between safety needle and syringe may be resulted by misuse.Additionally, accordingly to conducted empirical test based on instruction for use, if the safety needle is firmly seated on syringe as it is recommended by ifu and connection is verified by the user, then no problem with proper connection should occurred.We underline the necessity to following proper use as it shared on ifu from safety syringe to avoid problem connected the needle between the syringe.It suggests: before use, when rotating the safety needle to the syringe, the safety needle should be push in the direction to the syringe, in that case, the hub of safety needle will be rotated into deeper position of spiral line of luer lock, then the needle won't be separated from the syringe.
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