Patent ID: 7347851
Filing Date: 2008-03-25
Classification: A61B,A61M

Abstract:
1. A method of hypodermically delivering a drug into a patient's body through a patient's skin, said method comprising: providing a jet injection device capable of delivering the drug into the patient's body through the skin as a jet of liquid, forming an open electrical circuit between the patient's body and said jet injection device, providing an electric impedance monitor connected to said electrical circuit, starting measuring the electrical impedance between the patient's body and said jet injection device, delivering the drug into the patient's body through the skin as a jet of liquid, closing said electrical circuit through said jet of liquid, and detecting a change in the electrical impedance during the delivery of the drug into the patient's body, said change indicating a success or a failure of a piercing of the skin by the jet of liquid, wherein the electric impedance is measured directly through the jet of liquid.