Abstract: A blood extraction device has a holder with a hollow needle cannula anchored therein. A rear end portion of this cannula is surrounded by a closed-end elastic hose like valve rubber tube with an air gap between the tube and the cannula. With a minimum of effort and cost a reliable anchorage of the valve rubber tube in the holder is obtained by pressing a clamping member within the holder against the exterior of the valve rubber tube and thereby plastically deforming this clamping member.

Abstract: For the removal of a small amount of fluid, in particular blood, from a sealed container, and the deposition of a drop of fluid on a slide by a dropper, and the subsequent spreading of the drop, the rear end of a dropper needle having a longitudinal channel which passes therethrough is pressed through a seal into a container. Once the needle is inserted into the container, a drop of fluid moves out of the container via the longitudinal channel to a slide. After depositing the drop of fluid on the slide, the dropper itself is used to spread and distribute the drop of fluid on the slide, so that spreading of the drop of fluid is facilitated and hazardous waste is reduced to a minimum. The dropper used for this purpose is made integral with a spreader.

Abstract: A urine-output measuring apparatus has a catheter adapted to be inserted in a patient and having an outer end, a stationarily mounted flow device having an input connected to the outer end of the catheter and an output, a highly flexible tube having an input end connected to the output of the flow device and an output end, and an elongated urine-collection bag connected to the output end of the flexible tube. A relatively incompressible but flexible and elongated element of noncircular section is loosely received in the tube and extends generally a full length of the tube between its ends.

Abstract: A blood extraction device features an extraction cylinder (11) having a forward end for attaching a needle (12) and a rear end having an opening (13) for a piston rod (14) together with a piston (15) secured to the forward end of the piston rod (14) arranged to slide axially in the extraction cylinder (11). The piston (15) can essentially be moved only in the direction away from the foward end of the extraction cylinder (11) and practically incapable of being moved when subjected to a force in the direction of the forward end due to one-way coacting means of prevention (17 , 18).

Abstract: In accordance with the invention, a method for executing reactions at temperatures exceeding 50.degree. C. is disclosed using minimal quantities of fluid samples. The method uses a reaction vessel which minimizes the containment space for the fluid sample. The reaction vessel includes a sample-receiving tube and an insert. The insert engages the sample-receiving tube, forming a seal and prevents evaporation of the fluid sample during heating. The sample-receiving tube of the method is tapered to be narrow towards the bottom so that the insert can be easily inserted into the sample-receiving tube from the top and provide a tight seal in the lower extremity without increasing pressure in the reaction chamber. Equalization between the two sides of the sealing insert can occur as the insert is being introduced. Minimal displacement of the insert in the axial direction of the sample-receiving tube produces a sealing connection minimizing undesirable pressure build up.

Abstract: A blood extraction device has a cannula (11) the front end of which can be stuck into the vein of a patient and the rear end (11") of which stands in flow communication with the interior of a sample tubule (12) which is hermetically closed at its rear end (12") and is closed at its front end, apart from an air vent (13, 13'). An inner tube (14) extending into the interior of the sample tubule (12) sealingly adjoins the rear end (11') of the cannula (11) and has an internal cross-section such that during the taking of blood a continuous blood column (15) is pressed from the rear end (11") of the cannula (11) into the internal tube (14) and does not break away in any position of the sample tubule (12) relative to the direction of gravity, i.e. even when the tubule is arranged beneath the cannula (12), at least so long as the cannula (11) is inserted in the vein (16).

Abstract: The object of the invention is a blood extraction device comprising a cannula (1) for insertion at its front end into the vein of a patient, the rear end (1') of the cannula opening in an inner tube (2) located in the interior of a sample tubule (3), which is closed hermetically at its rear end and closed at its front end except for an air bleeder (4). In the blood extraction position the inner tube (2) is secured against withdrawal out of the sample tubule (3) by means of a cap (5) having releasable axial locking means (6), preferably by means of a screw cap. A perforatable and self-closing membrane (7) is arranged in the front portion of the cap (5); this membrane sealingly closes the inner tube (2) at its front end (8) in the blood extraction position and simultaneously pushes the inner tube (2) without play against an abutment in the sample tubule (3).

Abstract: A blood extraction device features an extraction cylinder (11) having a forward end for attaching a needle (12) and a rear end having an opening (13) for a piston rod (14) together with a piston (15) secured to the forward end of the piston rod (14) arranged to slide axially in the extraction cylinder (11). The piston (15) can essentially be moved only in the direction away from the forward end of the extraction cylinder (11) and practically incapable of being moved when subjected to a force in the direction of the forward end due to one-way coacting means of prevention (17, 18).

Abstract: A blood extraction device comprises an evacuatable extraction tube (11) which is open at one end and onto which a closure cap (12) can be detachably fitted which carries a cannula cone (14) which projects forwardly parallel to the tube axis (13) and extends concentrically into a cylindrical extenion (15) having a smaller diameter than the extraction tube (11) and constructed as rearwardly open tube and which consists of a rearwardly open stiff sleeve (20) closed at the front except for a needle passage opening (19) and a counter piece (21) adapted to be fitted sealingly onto the cannular cone (14) and having a passage (22).

Abstract: A liquid storage container has a tubule (11) which is open at one end and which is closed in liquid-tight manner at the front end face by a closure (12) which can be removed and/or opened for the filling of liquid into the tubule and/or for the removal thereof. An auxiliary closure cap (14) is provided for the closed tubule and has a locking ring 13 at its front open side. The auxiliary closure cap (14) is mountable onto the front end of the tubule (11), so that it covers over the closure (12) towards the outside. The locking ring (13) then snaps over a latch means (15) provided at the outer wall of the tubule (11) in its front region. The locking ring (13) is contrived so that it cannot be straightforwardly removed from the latch means by pulling it axially in the forward direction. In this way it is possible to check whether the liquid storage container has been tampered with.

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 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 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 extraction device is disclosed herein, which is an improvement over similar devices having a cylindrical extraction tube enclosing an air-tight piston and sealed with a closure cap having an axial projection which contains a self-sealing puncturable plug and is received within a movable tubular guide sleeve containing a double-ended cannula the rear end of which is enclosed by a deformable but resilient thin hose with a closed self-sealing rear end. The improvement resides in the inclusion of one or more slots on the guide sleeve and cooperating lugs on the projection, or vice versa, each slot having an axially extending portion and a peripherally extending portion, such that rotation of the rear cutting edge of the cannula is prevented during penetration of both the rear end of the hose and the plug, and rotation is possible only when penetration is complete.

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.