The medical room which is underground with that of the rest of the sound village, was once a testing lab of Orochimaru's. The lab was used to expiriment with peoples gene structures, often giving people a half fish like appearance, or other animalistic type looks. The expiriments done down here were not humane, often ending in someones body being tossed away. Now all the tables and flooring and everything about this lab had been destroyed and replaced with medical doctors and surgery tables to ensure that one is able to stay alive.