Abstract: A temporary casing is disclosed. The casing includes a primary portion capable of being driven into the ground and comprising a hollow portion wherein soil may be removed from within the primary casing portion, a detachable portion, also being capable of being driven into the ground and comprising a hollow portion wherein soil may be removed from within the detachable portion, a connection means for connecting the primary casing to the detachable portion such that the connection means enables the transfer of the driving force applied to the primary casing portion to the detachable portion in order to drive the detachable portion into the ground in association with the primary casing portion, wherein the connection means causes the detachable portion to detach from the primary portion when a threshold force is applied to the connection means and allows retrieval of at least the primary portion.

Abstract: A drainage control valve apparatus utilizes a pressure relief valve for opening upon a predetermined fluid pressure being applied thereto and a liquid column is used for holding the pressure relief valve open by the weight of the liquid column escaping past the pressure relief valve to apply a negative pressure to the back of a pressure relief valve element. A small opening or a check valve releases the suction column when drainage is complete to allow the pressure relief valve to close. The pressure relief valve may be a spring biased valve and may be adjusted by varying the compression on the spring. The unit may be attached to a patient's leg with a strap. A method of draining a bladder is provided having the steps of opening a pressure relief valve under bladder pressure in a catheter, holding the pressure relief valve open with the suction of a column of liquid formed by the liquid passing the opened pressure relief valve and releasing the pressure relief valve when drainage is substantially complete.