Other

Heinz S Wolff

David W Hawes

Richard D Vahrman

Justin A Halls

A controlled apparatus for withdrawing fluids from a patient or for administering medication to a patient, or both, which controlled apparatus may be remotely and/or automatically controlled. The apparatus includes a manifold and cannula for connecting the manifold to a patient, one or more syringes connected to the manifold, a pump for pumping liquid into and out of the manifold and a controller for controlling the operation of the syringes and the pump. A method of using the apparatus is also provided. The controlled apparatus is especially useful for the programmed withdrawal of blood from a blood vessel of a patient.

Method and apparatus for taking samples from or administering medication

A syringe capable of remote and/or automatic control. The syringe comprises a housing defining a main chamber, a piston at one end of the chamber and biasing means for urging the piston toward the other end of the chamber, and an opening into the chamber for liquid to pass. The piston is prevented from moving by a fusible element seated on the piston and on a fuse stop for preventing the movement. A heater is provided near the fuse stop which, when energized, melts that end of the fusible element to reduce its length and thereby permit movement of the piston under the urging of the biasing means. In this way injection or aspiration is accomplished. The heater may be energized and deenergized at will and when deenergized the fusible element ceases to be melted and the movement of the piston stops. This results in a syringe which can be turned on and off, which can inject or aspirate different and selected amounts of liquid depending upon the amount of time the heater has been on, and which can be operated for either injection or aspiration a plurality of times during the stroke from end of the chamber to the other. In a preferred embodiment, the heater and fuse stop are one and the same element.

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London NW11, United Kingdom

Heinz S Wolff