Abstract: The device is carried on the body of a patient under treatment and is associated with a container to contain the fluid to be administered to and by said patient and a remote needle to inject the fluid in the patient. The device comprises a one way valve system; a first flexible tube connecting the valve to said container and a second flexible tube connecting down-stream side of the valve to the needle. The one way valve system prevents the back-flow of blood from the patient or administered fluid, and the out flow of fluid back into the container. A calibrated syringe including a plunger is mounted in a syringe holder on the upstream side of the valve system. The syringe holder acts on the plunger to withdraw a predetermined portion of fluid from the container and thereafter to inject the predetermined portion to the patient.

Abstract: A blood aspiration assembly and method has proximal, intermediate and distal tubing, a reservoir having an adjustable volume and an aspirator receiver. A two-way valve can connect the reservoir to the intermediate tube and block flow to the proximal tubing, or can connect the intermediate and proximal tubing while blocking flow to the reservoir. The reservoir can be locked into selected withdrawal and discharge positions. The intermediate tube is connected with the aspirator receiver. The receiver is connected with the distal tubing. The receiver has a housing comprising a rigid casing and a resilient plug. The valve and reservoir can be operated to withdraw resident fluid from the assembly flow channels distal thereto into the reservoir, and draw blood from the patient into the intermediate tube to remove resident fluid from the aspiration chamber. A needle from a separate syringe is inserted through the plug into the aspirator chamber and a blood sample withdrawn.

Abstract: There are depicted two embodiments of an ambulatory disposable infusion delivery system in which fluid (drug) is fed to a substantially transparent receiving and retaining housing which has indicia markings conventionally applied to indicate quantity. The inflow of fluid causes an elastomeric member attached to a piston, which is slideable in a bore in this housing, to be moved, thus stretching this member. This tension provides an energy source (force) to push the fluid out of the bore when the connected tubing line is opened. The housing is provied with a discharge fluid conduit and a restrictor controlling the rate of flow. In both embodiments, the housing has a barrel with a substantially constant bore. The slideable piston in this bore has a resilient outer portion with at least two ribs providing sealing action while having a low coefficient of friction.

Abstract: Method and apparatus are disclosed for drawing blood from an injection site through an arterial line connected to a fluid supply. The apparatus includes a variable capacity pump mechanism housing having inner walls defining an interior chamber. The housing includes first and second ports connected to a variable capacity interior chamber. A retractable piston is disposed within the housing and is adapted to traverse within the chamber. A piston sealing member is provided about the piston in slidable sealing engagement with the chamber walls to cause fluid to be drawn into the chamber, thereby facilitating the extraction of a blood sample along the arterial line without the need to discharge an initial sample containing disproportionate amounts of supply fluid.

Abstract: A liquid dispensing apparatus is provided having a container for storing the liquid to be dispensed, an anti-drip valve cartridge connected to the container and a needle element connected to the valve cartridge. A device is provided for pressurizing the container for the duration of a time interval and for depressurizing the container to atmospheric pressure, simultaneously, with the end of the time interval. The valve cartridge has an outlet portion which sealably connects an outlet opening thereof in registry with the bore of the needle element. A pressure activated poppet valve can be provided in the valve cartridge to seal the outlet opening upon the depressurization of the container. After depressurization, a volume of liquid is left in the needle element which exerts a pressure at the end of the needle element that is less than the incoming atmospheric pressure.

Abstract: There is described an adjustable dose injection pistol comprising a body assembly (1) including an elongate chamber (8), a piston chamber (3) including a piston (13) slideable in the chamber (8) between filled and discharged positions and means for adjusting (16, 26, 19, 20, 22, 23) one of said positions.The means comprise a selectable plurality of channels (20, 22, 23) included in one of the assemblies (1, 3), the channels (20, 22, 23) being spaced about and parallel to the piston-chamber axis, and an arrestor (19) located on the other assembly (1, 3), the arrestor (19) being selectably engageable with an aligned channel (20, 22, 23) upon movement of said piston (13) between said positions.The channels (20, 22, 23) are preferably located in the piston assembly (3) on a sleeve (16) concentrically mounted with the piston (13) and rotable with respect to the chamber (8).The pistol may be used for the injection of liquids into animals.

Abstract: A dispenser for dispensing controlled quantities of liquid from a bottle includes a piston, which is movable in a cylinder and serves to suck and discharge an adjustable quantity of liquid. The cylinder is secured to a valve block, which contains a suction valve and a discharge valve. A cylindrical sleeve surrounds the cylinder and defines an annular clearance therewith. To change the length of the stroke of the piston and the quantity of liquid which is to be sucked and discharged depends on the stroke length, an adjustable stop and a fixed stop, which is engageable with the adjustable stop and are accommodated in the clearance.

Abstract: The invention refers to a method of mixing, for example, cytostatica stored in an ampule (1) provided with a rubber closure (8) or corresponding closure, with, for example, sterile water stored in a second ampule (2) provided with a rubber closure (12) or corresponding closure. The invention is characterized in that a first tube (7) of hypodermic needle shape, which is connected by a hose connection (6) to a first port (5) of a multi-way valve (4), is pierced through the rubber closure (8) of one ampule (1), that a second tube (11) of hypodermic needle shape, which is connected by a hose connection (10) to a second port (9) of the multi-way valve (4), is pierced through the rubber closure (12) of said second ampule (2). The interior of the ampules is interconnected by a hose connection (13), the two respective ends of which have the shape of hypodermic needles (14,15) and are pierced each through one rubber closure (8,12).