Abstract: A blood collecting vessel has a collecting tube (11) and a blood feed cap (12) with a scoop (16). The scoop (16) subtends an angle of approximately 45.degree. with the normal to the top wall (15) of the blood feed cap (12). (FIG. 1).

Abstract: In a method of extracting human saliva a resilient absorbent inert body is chewed by a person and is subsequently introduced into a centrifuge tubule (11) provided with an apertured floor (13). The centrifuge tubule (11) is introduced into a centrifuge and subjected to a spinning process, whereupon the saliva is pressed out of the resilient body (12) and passes through the floor (13) into the lower part of the centrifuge tubule (11).

Abstract: A blood extraction device includes a sample extraction tube having an open rear end and a first sealing surface at the rear end. A piston assembly includes a piston removably housed within the tube for movement between a retracted position toward the rear end and an extended position. The piston assembly also includes a piston rod portion extending through the open rear end of the tube. The piston rod portion has a reduced diameter portion along a substantial part of its length and an enlarged portion which defines a second sealing surface for complementary mating engagement with the first sealing surface when the piston is at its extended position. The piston is locked in its fully retracted position by the engagement of a forwardly facing annular flange on the piston assembly and a rearwardly facing annular step of the tube.

Abstract: A blood storage device consists of a blood extraction tubule (20) and a removable cover (12) which closes its upper opening. The cover (12) consists of a closure member (21) with a small opening (14) and a slider (13) arranged in the closure member (21) by means of which the passage of air from the inner space (17) of the blood extraction tubule (20) through the opening (14) can be interrupted.

Abstract: A blood sedimentation apparatus has an upright transparent sedimentation tube (11) which can be inserted into a sample container (32) containing blood and which can filled with blood up to a zero mark (13) provided in the upper region by displacing the blood contained in the sample container. A closure (12), which includes an overflow vessel (24) and a hollow spigot (14) which communicates therewith, and which extends from above into the sedimentation tube up to the zero mark (13) can be placed onto the upper end of the sedimentation tube (11). A closure member (15) which closes the opening (16) of the hollow spigot (14) can be introduced axially into the hollow spigot (14).

Abstract: An arrangement for placing a separating gel between two phases of different specific gravity located in a sample tube has a container (11) in which a separating gel (16) is accommodated. The container (11) which can be inserted into the sample tube up to the bottom thereof has a closed base (13) and a lid (14) at the top which can be displaced within the container in the manner of a piston. The lid is provided with at least one discharge opening (15) which is small relative to the area of the lid. The specific gravity of the lid (14) is greater than that of the separating gel (15) (FIG 3).

Abstract: A blood extracting and centrifuging device has a cylindrical body 1 with front and rear ends 2, 3. The front end is adapted to receive a removable cannula 4 and a piston 8 is sealingly movable within the cylindrical body 1. A piston rod 9 attached to the piston 8 extends through a bore 10 at the rear end of the cylindrical body and is used to retract the piston, from an advanced position adjacent the front end to a retracted position adjacent the rear end, whereby to generate a vacuum in the cylindrical body 1 for extracting blood via the cannula 4. Securing means in the form of an annular retaining projection 22 on one of the piston 8 and the piston rod and an annular lip 24 at the rear end of the cylindrical body 1 are provided to secure the piston to the cylindrical body in its retracted position. After a blood sample has been taken the piston rod 9 can be removed and the cylindrical body 1 inserted directly in a centrifuge without the need to transfer the blood to a centrifuging vessel.

Abstract: A blood sedimentation device has a transparent small-diameter sedimentation tube and is provided with a calibration mark a short distance below its upper end. The column of blood is introduced into the sedimentation tube and is precisely bounded at the lower end of the tube. The device has a displacement sleeve surrounding the lower part of the sedimentation tube in an airtight manner allowing movement by sliding, and further has a tubular receptacle, closed at the bottom, surrounding the displacement sleeve in an airtight manner allowing movement by sliding, this receptacle accomodates the blood sample.

Abstract: The invention relates to a filter device for separating blood fractions into a specifically heavier non-filtratable and a specifically lighter filtratable fraction, characterized by a piston of a soft resilient material, preferably a thermoplastic material, associated with a cylindrical vessel and adapted for airtight sliding movement therein, said piston containing a filter permeable for the specifically lighter fraction but impermeable for the specifically heavier fraction and having at the top side a constricted neck with a flaring upper opening.

Abstract: A capillary vessel for blood comprises a nozzle of capillary diameter, with a remaining portion widened of size such that a micropipette can be inserted therein, the end of the nozzle being closable with a plug.

Abstract: A pneumatic apparatus is employed to automatically load blood extracting devices. The apparatus includes a cylinder and a piston slidably receivable therein. The piston is connected to a casing or housing which supports a blood extracting device. The cylinder may be partially evacuated by forcing it into the housing. Once evacuated the cylinder is maintained in the biased position by a locking lever. The cylinder may be connected either to a blood receiving vessel or to a piston receivable within the blood receiving vessel through which the blood may be extracted. In order to extract blood the extracting device is first positioned in the vein of a patient in the conventional manner. The locking lever is then released and the partial vacuum within the cylinder causes the plunger within the blood receiving vessel to draw blood inwardly. A check valve and parallel channel arrangement in the plug at one end of the cylinder serves to slow and control the rate at which the blood is extracted.

Abstract: A multi-purpose syringe for extracting a body fluid, storing the fluid and being adapted to be employed as the test vial for centrifugation. The syringe includes a vial and at the forward end a nozzle which is threadedly connected for sealing purposes to a cap which has a spike extending into the passageway through which blood is drawn. A threaded end cover sealingly engages the rearward end of the vial and piston rod protrudes therethrough. The rod has at the forward end a piston head provided with a rearwardly extending sleeve which is placed into sealed locking engagement with the end cover after the specimen has been introduced or drawn into the vial. The combination of the cap at one end and the cover member at the other end provides a complete seal for the container. The piston rod has two portions which can be severed from each other.