Abstract: An integrated module for extracorporeal blood treatment has a flat-shaped support element which exhibits on an internal face thereof a complex of fluid distribution lines and on an external face thereof a high-flow dialyzer. The support element has a base body which exhibits fixture seatings, each of which houses an axially extended tract of a fluid distribution line. The tract of the fluid distribution line, with respect to adjacent tracts, has an increased diameter due to the presence of a junction collar made of a rigid material. Each fixture seating exhibits two axial locators for positioning the axially extended tract of a fluid distribution line in a fixed position. The locators interact with the junction collar, and the distribution lines can be fixed to the base body by a resilient fixture of the junction collars in the seatings without gluing. The module is configured to be mounted on an apparatus for intensive treatment of renal insufficiency.

Abstract: A hose cartridge for a peristaltic pump comprises a cartridge housing provided with a lateral recess. The recess is delimited at least partially by an element having essentially the shape of a segment of a circle. A roller wheel of the peristaltic pump can engage that recess once the cartridge is attached to the peristaltic pump. The cartridge housing is provided with two support arms, and a groove extends from one of the support arm along three outer side faces of the cartridge housing to the other support arm. The ends of the support arms are provided each with a hose take-up member for retaining stoppers attached to a hose section. Such a hose cartridge is of very compact design ensures an easy handling.

Abstract: Programmable, fluid pressure actuated blood processing systems and methods are used in association a blood separation device. The systems and methods employ a cassette, which contains several preformed, pneumatically actuated pump stations, several preformed fluid flow paths, and several preformed, pneumatically actuated valves in the fluid flow paths. The systems and methods also employ a programmable pneumatic actuator to hold the cassette and selectively apply pneumatic force to the valves and pump stations.

Abstract: A medical pump for use with a tube set having a slack portion includes a pump housing and a pumping mechanism to meter fluid into the outlet line from the inlet line. A tube snap or a tube snap set is located on the pump housing remote from the pumping mechanism to gather and hold a slack portion between first and second tube snaps. In addition or alternatively, a tube hanger can be attached to the pump housing to allow insertion of a slack portion between the tube hanger and the pump housing.

Abstract: A displacement pump comprising a pump assembly and a cassette assembly. The pump assembly includes upper and lower housing portions that define a cavity, an arm disposed in the cavity, a roller attached to the distal end of the arm, and a motor attached to the proximal end of the arm for rotating the arm. The cassette assembly is removably disposed in the cavity and comprises upper and lower cassette housing portions that form an annular compression surface with a channel therein. A hollow compression tube having a flange extending along a length thereof is secured to the compression surface by the flange being engaged with the channel. As the motor rotates the roller arm, the roller presses the compression tube against the compression surface to create a moving occlusion of the compression tube for pushing fluid through the compression tube.

Abstract: An infusion pump has a housing (10) accommodating a pump finger mechanism (12). The pump finger mechanism (12) acts on a pump hose (13) fastened at holders (16, 21) of the housing. The pump hose (13) is supported by a door (24). In order to facilitate proper and positionally correct placement of the pump hose, one of the holders (16) includes an oblique pin. The associated transition piece (15) of the pump hose (13) has a hole (18) with the same inclination angle as the oblique pin. The other transition piece (20) is of a different structure so that the transition pieces cannot be mixed up. A longitudinal color strip (29) on the pump hose is provided to visually indicate any twisting of the hose.

Abstract: A cartridge used with a peristaltic pumping apparatus, the cartridge comprising a housing and a retainer. The housing having a front and back portion along with a peripheral surface, where the front side is selectively engageable with the pumping apparatus and has a first channel formed in the front side. The retainer having a front side and a rear side, the front side adapted to receive a length of flexible tubing, where the rear side is receivable in the first channel.

Abstract: A surgical system having a cassette latching mechanism having two pivoting latching rails. The rails are connected to a rotating latching wheel by spring-loaded latching arms. The latching wheel is connected to a motor by a latching pushbar. The cassette is pressed into the rails which initiates the rotation of the rails, which close onto the cassette. The motor next rotates the latching wheel, producing cam-like movement of the latching arms and thereby further pivoting the latching rails to the fully closed and locked position.

Abstract: A peristaltic pump is disclosed having pump motor with a rotating motor shaft and a shaft axis; a peristaltic pump head rotatably mounted on the motor shaft; a raceway having a semi-circular track arranged around the pump head and coaxial with the shaft axis, wherein the track has a beveled edge at an entrance to the raceway to receive a tube loop being loaded into the pump; the pump head includes at least one roller orbiting the raceway and compressing the tube loop against said raceway, and a cartridge to which the tube loop is attached and mountable on the raceway.

Abstract: A heat exchange fluid supply system for supplying a heat exchange fluid to an intravascular heat exchange catheter includes a disposable cassette having a bulkhead and an external heat exchanger, and which is configured to operate in combination with a reusable master control unit The bulkhead includes a reservoir section and a pump section. The reservoir section is provided with a means to monitor the amount of heat exchange fluid that is in the system. The bulkhead provides the mechanism for priming the system with heat exchange fluid from an external source and for circulating fluid to the catheter in a closed circuit. The pump section is configured to allow for pumping of heat exchange fluid at a constant pressure.

Abstract: A cassette having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The flow channel projects outwardly from the exterior of the cassette so that a peristaltic pump having pump head rollers mounted radially from the axis of rotation of the pump motor compress the elastomeric flow channels against the rigid substrate during operation.

Abstract: Servo controlled solenoids provide actuation of a pump piston and valves, and electronic LC resonance measurements to determine liquid volume and gas bubble volume. Third order nonlinear servo control is split into nested control loops: a fast nonlinear first-order inner loop causing flux to track a target by varying a voltage output, and a slower almost linear second-order outer loop causing magnetic gap to track a target by controlling the flux target or the inner loop. The inner loop uses efficient switching regulation, preferably based on controlled feedback instabilities, to control voltage output. The outer loop achieves damping and accurate convergence using proportional, time-integral, and time-derivative gain terms. The time-integral feedback may be based on measured and target solenoid drive currents, adjusting the magnetic gap for force balance at the target current.

Abstract: A pump includes a housing defining a tube receiving portion and a blade mounted for reciprocating movement between first and second positions. In its first position, the leading edge of the blade compresses a length of tube against a first surface disposed in the tube-receiving portion, while in the second position, the blade does not compress the tube. The tube-receiving portion can receive the tube directly or indirectly through a tube set detachably mounted to the housing. The tube set includes a tube and a base having first and second end portions that respectively define first and second tube-receiving apertures for slidably receiving a length of the tube therethrough. The base has a first surface constructed to engage the length of tube between the apertures for compression by the pump blade.

Abstract: A surgical system and cassette, the cassette having a series of identifying tabs that are variably opaque to translucent. By varying the opaqueness of the tabs, the surgical system can readily identify the type of cassette being used.

Abstract: A heat exchange fluid supply system for supplying a heat exchange fluid to an intravascular heat exchange catheter includes a disposable cassette having a bulkhead and an external heat exchanger, and which is configured to operate in combination with a reusable master control unit. The bulkhead includes a reservoir section and a pump section. The reservoir section is provided with a means to monitor the amount of heat exchange fluid that is in the system. The bulkhead provides the mechanism for priming the system with heat exchange fluid from an external source and for circulating fluid to the catheter in a closed circuit. The pump section is configured to allow for pumping of heat exchange fluid at a constant pressure.

Abstract: The invention concerns a detector for detecting malfunction in a peristaltic pump wherein a flexible tubing (44) containing a fluid is locally compressed against a support part by rollers (32) mounted on a rotor (28) driven by a motor. Said detector is characterized in that it comprises: a ring (68) mounted sliding on the tubing between two extreme positions; driving means (64, 80, 84), actuated by the rotor, for subjecting said ring to a specific reciprocating motion between said positions; and detection means (74a, 74b, 84) reacting to an abnormal reciprocal motion by producing a warning signal.

Abstract: A peristaltic pump is disclosed having pump motor with a rotating motor shaft and a shaft axis; a peristaltic pump head rotatably mounted on the motor shaft; a raceway having a semi-circular track arranged around the pump head and coaxial with the shaft axis, wherein the track has a beveled edge at an entrance to the raceway to receive a tube loop being loaded into the pump; the pump head includes at least one roller orbiting the raceway and compressing the tube loop against said raceway, and a cartridge to which the tube loop is attached and mountable on the raceway.

Abstract: When a door is opened, a midway part of an infusion tube is temporarily held in a fixed position of a pump body and the door is to be closed, in order to actively prevent the door from being closed if the infusion tube is not properly set in its fixed position, so that a back plate base 132 can be placed in a state of interposition in which the infusion tube is properly held and an immovable state in relation to the door 4 can be ensured, there are provided a stopper member 70 to be shifted in the direction of arrow d1 by a shift energizing force to be placed in a state of engagement with the back plate base 132 when the door is open and a shape 64 provided on the pump body for shifting the stopper member 70 so as to eliminate the state of engagement when the infusion tube 2 is properly held temporarily in said fixed position and the door is shifted to a closed state in relation to the pump body 3.

Abstract: A surgical system and cassette, the cassette having a series of identifying tabs that are variably opaque to translucent. By varying the opaqueness of the tabs, the surgical system can readily identify the type of cassette being used.

Abstract: A surgical system having a cassette latching mechanism having two pivoting latching rails. The rails are connected to a rotating latching wheel by spring-loaded latching arms. The latching wheel is connected to a motor by a latching pushbar. The cassette is pressed into the rails which initiates the rotation of the rails, which close onto the cassette. The motor next rotates the latching wheel, producing cam-like movement of the latching arms and thereby further pivoting the latching rails to the fully closed and locked position.

Abstract: A cassette having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The flow channel projects outwardly from the exterior of the cassette so that a peristaltic pump having pump head rollers mounted radially from the axis of rotation of the pump motor compress the elastomeric flow channels against the rigid substrate during operation.

Abstract: A blood processing system comprises a processing chamber to process blood and a fluid flow cassette that communicates with the processing chamber. The cassette comprises a body, a pump chamber formed in the body, and a flexible diaphragm on the pump chamber responsive to an applied fluid pressures for flexure toward and away from the pump chamber to pump fluid through the pump chamber. The cassette also includes a flow path formed, at least in part, in the body to couple the pump chamber in fluid flow communication with the processing chamber, to convey fluid pumped by the pump chamber into the processing chamber. The cassette also includes an in line cavity formed in the body and located in the flow path to trap air to prevent entry of air into the processing chamber.

Abstract: A peristaltic pump having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The pump head rollers are mounted radially from the axis of rotation of the pump motor and compress the elastomeric flow channels against the rigid substrate.

Abstract: A hose cassette (1), for a peristaltic pump (2), includes a cassette housing (3) and a flexible hose (4) extending through cassette housing (3). The hose (4) is guided in the cassette housing (3) along a circular segment. The cassette housing (3) has a cutout (5) for the engagement of a roller wheel (6) of a peristaltic to pump (2) into the interior of said circular segment. The hose cassette has connection elements (7), (8) for connecting the cassette housing (3) to the peristaltic pump (2). At least one hose leg (9), (10) to be connected to the circular segment is displaceably held between a mounting position and an operating position in the cassette housing (3).

Abstract: A medical irrigation pump and pump system utilize a permanent non-sterile drive motor capable of operating disposable sterile single use pump units each of which is specifically designed for a particular medical procedure. The pump units have housing which are adapted to be interchangeable within the permanent controller system. Only the sterilized and disposable pump units come into contact with the fluid pathway during pumping. A pattern of bumps on each pump unit is unique for the medical procedure for which the pump unit was designed. The pattern of bumps engages switches on the controller, enabling the controller to identify what type of pump unit has been installed. After automatically identifying the type of pump unit and the intended medical procedure, the controller automatically selects a default motor speed that will provide an appropriate fluid pressure for that particular procedure. Buttons on a control panel also enable the user to manually adjust the pressure delivered by the pump.

Abstract: The pressure rollers of a peristaltic tube positive displacement pump are incorporated as an element of a reduction system connecting a drive shaft to the rollers.

Abstract: A peristaltic pump having a molded flow channel contained on an elastomeric sheet that is bonded or mechanically attached to a rigid substrate. The pump head rollers are mounted radially from the axis of rotation of the pump motor and compress the elastomeric flow channels against the rigid substrate.

Abstract: A hose cassette (1), for a peristaltic pump (2), includes a cassette housing (3) and a flexible hose (4) extending through cassette housing (3). The hose (4) is guided in the cassette housing (3) along a circular segment. The cassette housing (3) has a cutout (5) for the engagement of a roller wheel (6) of a peristaltic to pump (2) into the interior of said circular segment. The hose cassette has connection elements (7), (8) for connecting the cassette housing (3) to the peristaltic pump (2). At least one hose leg (9), (10) to be connected to the circular segment is displaceably held between a mounting position and an operating position in the cassette housing (3).

Abstract: In a pump chassis (112), spring-loaded members (108a, 108b) engage a pumping cassette (114) to it in a predetermined position. The members each include pairs of latches (110a, 110b) that are each beveled to form a ramp so that the latches and associated members are forced outwardly to enable the pumping cassette to be seated within the pump chassis. The latches engage the pump cassette as it is seated, holding it securely. A release button (138) is attached to a spring-loaded shaft (144) that extends into the interior of the pump chassis. The shaft has a ramp formed on its inner end. When the user depresses the release button, the ramp rides under inwardly extending arms (162a, 162b) provided on the members, forcing the members and attached latches to move outwardly. As the members move outwardly, the pumping cassette is released and readily removed.

Abstract: A miniature peristaltic pump includes a rotor with three turning rollers, a support piece with a rounded portion arranged substantially concentric to the rotor and against which, when operating, the rollers are brought to compress a flexible tubing connected to a reservoir of solution to push it outwards and for automatically compensating positional deviations between the roller and the support piece. Each roller has a substantially cylindrical body and a shaft on which the body is rotatably mounted. The ends of the roller shafts are located in oblong slots radially recessed in the rotor. The compensating device includes two springs arranged at the respective ends of the shafts and have a central port concentric to the rotor and three curved spring arms, one for each roller, with one end connected to the central part and the other end bearing on the corresponding end of a roller shaft to push it outwards and thus enable it to exert a substantially constant force of pressure.

Abstract: A pump module includes a peristaltic pump having a pump rotor, a drive mechanism to rotate the rotor, and a tubing clamp adjacent to and separate from the peristaltic pump. A cover is movable between a closed position on the pump module, enclosing both the pump rotor and the tubing clamp, and an opened position spaced from the pump module, exposing both the pump rotor and the tubing clamp. The cover carries a tubing organizer, which holds tubing. The tubing organizer serves, as the cover moves toward the closed position, to orient the tubing in a desired way with the pump rotor and tubing clamp. The tubing organizer also serves, as the cover moves toward the opened position, to orient the tubing away from the pump module.