SUCTION-PUMP ASSEMBLY FOR DRAWING BODY FLUIDS

• US 3,841,331 A
• Filed: 11/17/1972
• Issued: 10/15/1974
• Est. Priority Date: 11/17/1972
• Status: Expired due to Term

• Current Assignee: Joseph R. Wilder, Maurice S. Kanbar
• Original Assignee: Joseph R. Wilder, Maurice S. Kanbar
• Inventors: Kanbar, Maurice S., Wilder, Joseph R.
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): McGowan, J. C.
• Application Number:
  US05/307,459
• Time in Patent Office: 697 Days
• Field of Search: 128/DIG.1,214R,214B,214F,218,230,234,260,276-278
• US Class Current: 604/152
• CPC Class Codes: A61M 1/80 Suction pumps A61M1/64, A61M1/71, A61M60/00 take precedence

Abstract

A disposable evacuator assembly for drawing fluids from a surgical site or body orifices. The assembly comprises a standard syringe in which a piston is slidable within a cylinder whose upper end is flanged. The lower end of the cylinder is provided with an outlet that is coupled through a uni-directional relief valve to a collector bottle which, in turn, is coupled by a drain pipe to the surgical site. The piston is actuated by a stem terminating in a flange. The assembly is operatively associated with a driver provided with a stationary fitting adapted to receive the cylinder flange and to latch the cylinder thereto, and a movable fitting adapted to receive the stem flange, the movable fitting being shifted back and forth relative to the stationary fitting to cause reciprocation of the piston within the cylinder to create a suction force drawing fluid into the collector bottle. To dispose of the assembly after use, the syringe is detached from the fittings.

Claims

1. A disposable pump assembly for evacuating fluid from the body of a patient or for infusing fluid into said body, said assembly and the driver therefor comprising:

A. a bottle for containing a fluid to be infused into the body or for receiving fluid evacuated from the body, said bottle being provided with first and second inlets, said first inlet communicating with an air space in said bottle, said second inlet functioning with respect to infused or evacuated fluid, B. a pipe connected to said second inlet for coupling said bottle to said body for infusion or evacuation;

C. a disposable, standard syringe functioning as an air pump and constituted by a cylinder having an outlet and a movable piston therein, said piston being actuated by an axial stem connected thereto, D. a powered driver having a stationary fitting and a movable fitting which reciprocates with respect to said stationary fitting, said fittings including means effecting a detachable coupling to said cylinder and to said stem whereby said syringe may readily be coupled to said fittings or withdrawn therefrom, and E. pipe means having a reversible uni-directional valve interposed therein coupling the outlet of the syringe to said first inlet, said assembly being operative in the evacuating mode when said valve functions in a predetermined direction and being operative in the infusion mode after the valve setting is reversed when said valve functions in the reverse direction.

2. An assmebly as set forth in claim 1, wherein said valve is set for operation in the evacuation mode, whereby in the forward stroke of said piston air ejected from the cylinder is discharged by said valve to the atmosphere and in the return stroke air is drawn into said cylinder from said bottle to produce a suction force withdrawing fluid from the body.

3. An assembly as set forth in claim 1, wherein said valve is set for operation in the infusion mode whereby in the forward stroke of said piston, air is forced into said bottle to force fluid therefrom through said feed pipe and in the return stroke air is drawn into said cylinder from the atmosphere.

4. An assembly as set forth in claim 1, wherein said power driver is constituted by a motor whose armature shaft operates a crank coupled to said movable fitting.