A method of using Argon gas for treating a condition associated with mu opioid receptors andor the vesicular monoamine transporter activity in a mammal, said method comprising the steps of: a. The inflator supplies gas to the airbag. The spring is windable by a user to store mechanical potential energy and when released, unwindable to release the stored energy and cause relative rotation between the body and the shaft. The utilization of hydrostatic pressure to increase the pressure of the gas charge allows the use of a low pressure gas charging system to prepare the apparatus prior to sampling, thereby increasing the safety and ease of use of the device. The method comprises: forming a trench or groove on an outer surface of an electrical printed circuit board; providing optical material in the trench thereby to form an optical waveguide. The present invention further relates to a process for synthesizing a compound of the formula, and use of the compound of the formula in the manufacture of a medicament for the prevention or treatment of cardiovascular or cerebrovascular diseases.