| 摘要 |
A jet injector is described in which a rigid tube ( 1 ) terminates in a nozzle ( 15 ) at one end and a non return valve ( 46 ) at the other. There is a hole ( 3 ) in the tube wall and an elastomeric liner ( 11 ) within the rigid tube ( 1 ). There is also a C spring attached to a rotatable mass ( 24 ), which in turn bears a piston ( 26 ). The spring is bi-stable. It may be cocked manually and triggered by pressure on the skin such that the mass is accelerated and the piston impacts on the elastomeric liner to produce a high pressure transient. This in turn produces a liquid jet that pierces the skin and permits administration of the drug through the hole so formed, using a the piston in a standard syringe.
|
