ruptured by needle 350 in response to at least a minimal degree of needle insertion within the needle port partial or full needle insertions may occur due to tampering or inadvertent use by medical personnel in this case when the balloon is ruptured by the needle the colored fluid is released and indicates occurrence of the injection e g or any tampering or inadvertent use due to a needle insertion in addition an empty sealed chamber 460 may be utilized to indicate the occurrence of an injection as illustrated in fig7 initially needle port 300 is substantially similar to the needle port described above and includes sealed chamber 460 with fluid barrier 450 when a needle 350 is inserted through membrane 250 and enters needle port 300 the needle pierces fluid barrier 450 thereby causing fluid from iv bag 2 to flow into chamber 460 the presence of fluid in the chamber indicates the occurrence of the injection in addition a syringe needle may be inserted into sealed chamber 460 without piercing fluid barrier 450 to dispense fluid from the syringe this may occur due to tampering or inadvertent use of medical personnel in this case the presence of dispensed fluid in the chamber indicates the occurrence of the tampering or injection operation of the present invention is described with reference to fig1 7 initially a patient is to be treated using iv bag 2 with an iv administration set iv bag 2 includes injection port 100 for introducing medicine into the.