Medivena One-Care Insulin And Tuberculin Safety Syringes. ONE-CARE Insulin Safety Syringes offer intuitive handling as well accepted insulin delivery method in Long Term Care setting with needle temporary covering mode for transportation from nursing to residents rooms. ONE-CARE Insulin Safety Syringes have low dead space to minimize loss of medication and provide the nurses with audible indication when the shield is turned right ot left to permanently lock the needle (''Click''). Large barrel flanges aloow for good grip and control of insulin dosing.