#$%^&*AU2011201858B220131010.pdf#####IMPROVED SAFETY INTERLOCK Abstract A safety interlock (61) for use in a medical device having a control system for controlling operation of the medical device includes a central tubular portion (83)defining 5 a fluid passage for passing fluid through the safety interlock (61). An outer ring (88) portion is adapted for mounting the safety interlock (61) in the medical device. A spoked connector portion (87) connects the central tubular portion (83) to the outer ring portion (88) so that the outer ring portion (88) is spaced radially outwardly from the central tubular portion 83) in opposed relation with at least a portion of the central tubular portion io (83). The safety interlock (61) is adapted for mounting in the medical device in a path of electromagnetic radiation from a source of electromagnetic radiation (105) such that the central tubular portion (83) reflects the electromagnetic radiation to a electromagnetic radiation detector (109) when properly loaded on the medical device.
