Instruments for injection of contrast fluids for x-ray examination of fistulas

Claim 1

A DEVICE FOR THE INJECTION OF FLUIDS SUCH AS CONTRASTING FLUIDS INTO FISTULAS FOR X-RAY PURPOSES, COMPRISING A DISC HAVING OPPOSITE PARALLEL SIDES, AT LEAST ONE OF SAID SIDES BEING PLANAR, AND A PERIPHERAL WALL, THE SIDE OPPOSITE THE PLANAR SIDE BEING THE FISTULA FACING SIDE, THE PERIPHERAL WALL BEING OF SUCH DIMENSIONS AS TO ACCOMMODATE A DEEP AND BROAD GROOVE DEFINING AN ANNULAR SUCTION CHAMBER OPEN TOWARD THE FISTULA SIDE, A THICK CENTRAL COLUMN DEFINING A CENTRAL ANNULAR WALL FOR THE SUCTION CHAMBER LOCATED WITHIN SAID CHAMBER AND EXTENDING FROM THE TOP OF THE CHAMBER AND HAVING A FREE END TERMINATING IN THE PLANE OF THE FISTULA FACING SIDE AND ADAPTED TO COVER THE FISTULA, THE DIMENSIONS OF THE PERIPHERAL WALL BEING SUCH AS TO ACCOMMODATE A CHANNEL EXTENDING IN PARALLELISM TO SAID PLANAR SIDE OF THE DISC AND HAVING AN INLET END ADJACENT THE PERIPHERAL WALL, A FITTING FOR CONNECTING SAID INLET END TO A SOURCE OF CONTRASTING FLUID, SAID CENTRAL COLUMN HAVING A DUCT COMMUNICATING WITH SAID CHANNEL EXTENDING LONGITUDINALLY OF THE COLUMN AND PROVIDED WITH AN OUTLET LOCATED AT THE FREE END OF THE COLUMN, SAID DISC BEING PROVIDED WITH A SECOND CHANNEL LOCATED BETWEEN SAID FIRST NAMED CHANNEL AND THE TOP OF THE SUCTION CHAMBER EXTENDING PARALLEL TO THE FIRST NAMED CHANNEL AND HAVING AN INLET END ADJACENT THE PERIPHERAL WALL, A FITTING FOR CONNECTING THE INLET END OF THE SECOND CHANNEL TO A SOURCE OF SUCTION AIR, AND SAID SECOND CHANNEL HAVING AN OUTLET END IN COMMUNICATION WITH SAID SUCTION CHAMBER WHEREBY THE FISTULA FACING SIDE OF THE DISC IS FREE FROM OBSTACLES HINDERING THE RECEPTION OF X-RAYS.

Claim 2

A DEVICE FOR THE INJECTION OF FLUIDS SUCH AS CONTRASTING FLUIDS INTO FISTULAS FOR X-RAY PURPOSES, COMPRISING A DISC HAVING OPPOSITE PARALLEL SIDES, AT LEAST ONE OF SAID SIDES BEING PLANAR, AND A PERIPHERAL WALL, THE SIDE OPPOSITE THE PLANAR SIDE BEING THE FISTULA FACING SIDE, THE PERIPHERAL WALL BEING OF SUCH DIMENSIONS AS TO ACCOMMODATE A DEEP AND BROAD GROOVE DEFINING AN ANNULAR SUCTION CHAMBER OPEN TOWARD THE FISTULA SIDE, A THICK CENTRAL COLUMN DEFINING A CENTRAL ANNULAR WALL FOR THE SUCTION CHAMBER LOCATED WITHIN SAID CHAMBER AND EXTENDING FROM THE TOP OF THE CHAMBER AND HAVING A FREE END TERMINATING IN THE PLANE OF THE FISTULA FACING SIDE AND ADAPTED TO COVER THE FISTULA, THE DIMENSIONS OF THE PERIPHERAL WALL BEING SUCH AS TO ACCOMMODATE A CHANNEL EXTENDING IN PARALLELISM TO SAID PLANAR SIDE OF THE DISC AND HAVING AN INLET END ADJACENT THE PERIPHERAL WALL, A FITTING FOR CONNECTING SAID INLET END TO A SOURCE OF CONTRASTING FLUID, SAID CENTRAL COLUMN HAVING A DUCT COMMUNICATING WITH SAID CHANNEL EXTENDING LONGITUDINALLY OF THE COLUMN AND PROVIDED WITH AN OUTLET LOCATED AT THE FREE END OF THE COLUMN, SAID DISC BEING PROVIDED WITH A SECOND CHANNEL LOCATED BETWEEN SAID FIRST NAMED CHANNEL AND THE TOP OF THE SUCTION CHAMBER EXTENDING PARALLEL TO THE FIRST NAMED CHANNEL AND HAVING AN INLET END ADJACENT THE PERIPHERAL WALL, A FITTING FOR CONNECTING THE INLET END OF THE SECOND CHANNEL TO A SOURCE OF SUCTION AIR, AND SAID SECOND CHANNEL HAVING AN OUTLET END IN COMMUNICATION WITH SAID SUCTION CHAMBER WHEREBY THE FISTULA FACING SIDE OF THE DISC IS FREE FROM OBSTACLES HINDERING THE RECEPTION OF X-RAYS.