Ringer's solution [SEP] named after
the case of septic arthritis. Its clinical uses are for replacing extracellular fluid losses and restoring chemical balances when treating isotonic dehydration.
History.
Ringer's solution is named after Sydney Ringer, who in 1882–1885 determined that a solution perfusing a frog's heart must contain sodium, potassium and calcium salts in a definite proportion if the heart is to be kept beating for long. This solution was adjusted further in the 1930s by Alexis Hartmann, who added sodium lactate to form Ringer's lactate solution.
after a blood loss due to trauma, surgery, or a burn injury. 
Ringer's lactate solution is used because the by-products of lactate metabolism in the liver counteract acidosis, which is a chemical imbalance that occurs with acute fluid loss or kidney failure.
The IV dose of Ringer's lactate solution is usually calculated by estimated fluid loss and presumed fluid deficit. For fluid resuscitation the usual rate of administration is 20 to 30 ml/kg body weight/hour. RL is not suitable for maintenance therapy (