DISPOSABLE CARTRIDGE INJECTOR Russian patent published in 2012 - IPC A61M5/24 A61M5/32 

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to devices for subcutaneous, intramuscular, intravenous and intraosseous introductions of liquid drugs placed in carpules used for single injections, particularly for local anaesthesia in dentistry. A disposable cartridge injector comprises a cylindrical body on one end of which there is a handle support for fingers with a hole on an end face for placing a movable rod support with a rod-like tip, and on the opposite end there is a bushing for a double needle, a carpule placed in the body and contacting the carpule rod and the rod support tip, and a clamp with the double injection needle. The bushing with the double needle is threaded to attach the clamp with the double injection needle and a protective needle cap. The handle support is attached on the body by fixing flanges of the body and female hole slots on the handle support, and supplied with a carpule hold-down clamps. The carpule end opposed to the rod has a metal cap. The body comprises an extendable protective cap shaped after the body, movable along the body, extending the needle for the whole length and attached on the body by the clamps comprising a fixing assembly. From the bushing for the double needle, the body has two movable flanges each of which with its one end is attached to an internal surface of the body, while another end is free; both are extended outside when the carpule moves inside the injector body and forms a projection for the protective cap and arresting its return run, and two fixed flanges.

EFFECT: improved sterility of the whole injection system before the contact with the patient, minimised potential needle infection of the medical personnel not only during the injection, but also during the destruction of the used injectors due to the provided fixing assembly with movable flanges, improved psychoemotional state of the patient due to eliminating the assembly and preparing the injector syringe for use in front of the patient, as well as reduced risk of introducing the anesthetising solution into a vessel due to conducting the complete aspiration test.

6 cl, 3 dwg