Nowadays, wireless networks play a vital role in diverse filed due to a huge area of application. An ad-hoc network is a mull over as a fragmentation type of wireless network. MANET is a category of an ad-hoc network where nodes are high octane. The MANET is made up of a number of mobile nodes that can connect to each other over multi-hop wireless links on an ad-hoc basis. Adhoc mobile networks have diverse routing protocols of a different class. After research, we came to a conclusion that every protocol having some advantageous and limitation and every protocol cannot be deployed in every circumstance for underwater WSN there are different class of protocols. In this review paper a deep analysis carried out on proactive (table driven), reactive (on demand) and hybrid protocol. Further our main backbone is to know about those protocols which take minimum energy in health care system. The reference article having three protocols of different category DSR, DSDV, and AODV. Today advance and unorthodox applications for healthcare environments based on a wireless network are being flourished in the private enterprise. The prominent wireless networks are growing an elementary part of every single field of life. Our research work will be carried out in NS2.