MEDICINE ADMINISTRATOR WITH SINGLE STROKE

摘要

A material dispensing apparatus for placing a material in the uterine cavity and moving the material from the uterine cavity into the fallopian tubes of a female. An elongated probe carries an expandable member, and a housing connected to the probe has a piston and cylinder structure and a container for storing the material. Material and expansion drive mechanisms are connected to a single actuator selectively controllable by an operator. When the actuator is operated it is moved into the housing to both dispense the material and expand the expandable member. Pressure control means are provided in the drive linkage for expanding the expandable member to assure that a predetermined maximum pressure is not surpassed. The operator may fully depress the actuator and the pressure control means will both determine the maximum pressure and substantially maintain that pressure should a leak occur. Additional pressure control means are provided in the cylinder structure to compensate for atmospheric pressue change and to coordinate the balloon expansion relative to the material dispensing. Means are also provided in the material dispensing drive linkage to prevent the dispensed material from flowing back into its container when maximum pressure is applied. A replaceable probe portion is provided in the preferred embodiment.