Abstract: Disclosed is a human powered water walker having a plurality of two-position flippers for effecting propulsion and steering of the water walker when the same is is actuated by human power. Each of the flippers is beveled at its front end and has at its rear end a downwardly beveled tab. The water walker may have two interlaced boyant ski trimarans to which the flippers are connected.

Abstract: Disclosed is a human powered water walker having a plurality of two-position flippers for effecting propulsion and steering of the water walker when the same is is actuated by human power. Each of the flippers is beveled at its front end and has at its rear end a downwardly beveled tab. The water walker may have two interlaced boyant ski trimarans to which the flippers are connected.

Abstract: A collapsible three-dimensional game board having platforms separated by pillars, there being elastic cords which allow the game board to be held in an erect or collapsed position. The board may be used to play a game in which tokens, which may carry numbers or letters or be in the shape of numbers or letters, are placed into empty spaces of the platforms to achieve a desired effect.

Abstract: A game having a three-dimensional game board and two or more sets of tokens. The game board has at least three vertically spaced-apart platforms each of which has thereon markings dividing it into nine or more areas laid out in a square patterns. The tokens of each set are distinguishable from the tokens of each of the others sets, and the tokens of each is provided with serial markings. The game is played by placing sequentially marked tokens into empty spaces in a game board platform and/or matrix game board to achieve an in-line arrangement of at least three of the tokens.

Abstract: A pump or method supplying patient controlled analgesia to a patient. The infusion flow rate of the analgesic is increased in response to a command given by the patient receiving the analgesic, and a lock out interval is provided during which time the actuation of the pump by the patient produces no further incremental increase in the flow rate of the analgesic.

Abstract: A method of intubating a patient and an introducer for use with such method. The placement of the introducer is checked by measuring the carbon dioxide level of the gaseous medium flowing out of it, thereby giving an indication as to whether or not the introducer has been properly placed in the trachea of the patient. The introducer incorporates a flexible tube with a removable reinforcing element inside, which allows the introducer to be sufficiently stiff when being introduced into the patient and after removal of the reinforcing element, sufficiently flexible to be placed between the face of the patient and a face mask used to ventilate the patient.