Nano machines have been used for medical purposes since the early 2100’s. The technology underwent a huge advance in 2143 with the development of the Autonomous Nanomachine Task System (ANTS) and by 2160 the implantation of Medical ANTS in all citizens became standard practice. While earlier M-ANT systems could perform health monitoring and minor tasks, such as delivery of targeted medicines, later versions effectively worked to extend human life.
Medical Nano-machines are powered by the bodies internal electrical impulses, and in a passive state they monitor health and perform various cellular maintenance tasks. This not only reduced normal cellular aging in humans but vastly extended lifespans. M-ANTS can also be powered externally using field generators (Medical ANTS don’t use the same Nueon technologies as as ANT Systems). With this additional power they enter an active mode and repair and treat more significant damage. In extreme cases where damage is too severe to repair, due to limitations in programming or resources, M-ANTS can even stave off death by clustering around the heart and brain, artificially stimulating them for up to 60 hours. In that time the patient can be taken to a medical facility and treated with more powerful systems.
M-ANTS technology has made premature death rare and the average human life span is on average 190 years, with those having access to high-end medical facilities able to live well past 2 centuries.
After 200 years M-ANTS begin to show their limitations and are increasingly unable to maintain cellular health in a passive state and the body begins to show signs of normal aging. Aging continues until cellular degradation can no longer be managed resulting in a rapid decline in health and death. Maximum human age depends on access to medical facilities, genetics, and individual health factors, but it is not uncommon to live until 270. The oldest known person died at 310 in 2401.
Other limitations of the M-ANT Systems are severe head traumas and neurological conditions affecting the central nervous system or synaptic functions. As expected, proper nutrition and avoidance of physically hazardous conditions also play a factor in effective M-ANTS operation.