Pump for oscillating a fluid in vivo

DETAILED DESCRIPTION An object of this invention is to stir a solvent fluid in a body area to increase the effectiveness of the solvent.
Another object of this invention is to oscillate a fluid into and out from a localized body area to agitate a solvent fluid in that area to improve the distribution and the effectiveness of the solvent fluid.
A further object of this invention is to inject a fluid into a localized body area at a relatively high rate and to aspirate the fluid from the body area at a slower rate.
Still another object of the present invention is to provide a pump for oscillating a fluid into and out from a body area, where the parts of the pump that come into direct contact with the oscillating fluid are easy to remove and replace.
These and other objects are attained with a pump for directing an oscillating fluid into and out from a body area.
The pump comprises a member forming a pump inlet and a fluid chamber in communication therewith for holding the fluid; oscillating means for forcing fluid outward from the fluid chamber and into the body area, and for drawing fluid inward from the body area and into the fluid chamber; power means connected to the oscillating means to drive said oscillating means, and control means connected to the power means to control movement of the oscillating means.
The control means includes switch means having a first state actuating the power mean to force fluid outward from the pump and into the body area, and a second state actuating the power means to draw the fluid from the body area and inward into the pump.
The switch means includes first adjustable means to vary the rate at which fluid is forced into the body area, and second adjustable means to vary the rate at which fluid is draw from the body area.
The control means further includes means to change the switch means between its first and second states.