20130079705 | METHOD FOR MONITORING AND CONTROLLING PERITONEAL DIALYSIS - A dialysis apparatus includes a housing; a first electrical contact carried by the housing; a hydrogel material located within the housing; a second electrical contact connected to the hydrogel material, the hydrogel material located so as to be contacted by a liquid flowing through the housing; and wherein the hydrogel material expands as the material absorbs the liquid such that the second electrical contact is moved and eventually engage the first electrical contact. | 03-28-2013 |