Abstract: Multiple reservoir implantable valve accumulator pump for the delivery of medication, and method of infusate delivery. The apparatus includes at least first and second infusate reservoirs in a common pressure chamber, each in fluid communication with a metering assembly. The metering assembly includes an accumulator that is preferably a fixed volume accumulator having an inlet and an outlet. A first valve is in fluid communication with the first infusate reservoir and an inlet of the accumulator, and a second valve is in fluid communication with the second infusate reservoir and an inlet of the accumulator. An outlet valve is in fluid communication with the outlet of the accumulator. The accumulator can be filled with infusate from the first and second infusate reservoirs sequentially, can be filled from the first infusate reservoir multiple times consecutively, the second infusate reservoir multiple times consecutively, or any combination or permutation thereof.

Abstract: Multiple reservoir implantable valve accumulator pump for the delivery of medication, and method of infusate delivery. The apparatus includes at least first and second infusate reservoirs in a common pressure chamber, each in fluid communication with a metering assembly. The metering assembly includes an accumulator that is preferably a fixed volume accumulator having an inlet and an outlet. A first valve is in fluid communication with the first infusate reservoir and an inlet of the accumulator, and a second valve is in fluid communication with the second infusate reservoir and an inlet of the accumulator. An outlet valve is in fluid communication with the outlet of the accumulator. The accumulator can be filled with infusate from the first and second infusate reservoirs sequentially, can be filled from the first infusate reservoir multiple times consecutively, the second infusate reservoir multiple times consecutively, or any combination or permutation thereof.

Abstract: A pinch clamp assembly for engaging a tube with an enteral feeding or infusion pump adapted to feed nutritionals or to infuse medical solutions to a patient, is provided comprising a base (1) comprising holding means (3) for holding a pumping section (10) of the tube in operative engagement with the base (1) and supporting means (5) for supporting a connector (6), a clamping element (7) having clamping surfaces engageable with the pumping section (10) and moveable between an open position allowing flow of fluid through the pumping section (10) and a closed position, a cover element (8) for slidable engagement with the clamping element (7) and the connector (6), the cover element (8) being removable from the pinch clamp assembly, wherein the cover element (8) is mountable to or dis-mountable from the clamping element (7) and the connector (6) only when the clamping element (7) is in the closed position, wherein in the mounted position of the cover element (8) the clamping element (7) can be brought into the op

Abstract: A peritoneal dialysis machine including a membrane pump and a touch screen display that includes a mode-indicating portion and an operation-descriptive portion, the mode-indicating portion having a plurality of touch sensitive indicia each indicating one of a plurality of modes in which the machine can operate, the display being used to keep a patient continually informed of which one mode of at least three operating modes the machine is operating in, as the operation-descriptive portion changes to display details of a specific operation being carried out within the one mode, the indicia for each of the three operating modes always being visible to the patient while the machine is operating, the operating mode being selected by the patient touching one of the indicia on the screen.

Abstract: A system and method for a patch-like, self-contained substance infusion device which provides one or more substantially hidden patient needles which can be placed in fluid communication with a fluid reservoir, wherein the device can be attached to a skin surface via an adhesive contact surface and a push button activation assembly can then be used to remove an interlock, allowing a disk, or Belleville spring assembly to apply an essentially even and constant pressure to the contents of the fluid reservoir, allow the release of the patient needles into the skin surface, and establish a fluid communication path between the patient needles and the pressurized fluid reservoir contents. The push button activation assembly further allows the release of one or more improved safety mechanisms after use.

Abstract: An improved elastomeric pump for an infusion assembly. The pump includes a generally cylindrical mandrel body with first end, an opposed second end, a length, an outer diameter corresponding to a first radius (Rmandrel), a central bore extending through the length, a first port extending from the outer diameter to the bore to provide a fluid passageway, a fill port and an exit port in fluid communication with the bore. The pump includes an inflatable elastomeric tube disposed concentrically about the mandrel, the tube being sealingly secured on the mandrel near the respective ends of the tube and having an original inner diameter that corresponds to a second radius (r) so that it approximately matches the outer diameter of the mandrel (Rmandrel), a length (L) less than the length of the mandrel, a wall thickness (t) such that: (0.4225×r)<t?(0.660×r).

Abstract: A peritoneal dialysis machine including a membrane pump and a touch screen display that includes a mode-indicating portion and an operation-descriptive portion, the mode-indicating portion having a plurality of touch sensitive indicia each indicating one of a plurality of modes in which the machine can operate, the display being used to keep a patient continually informed of which one mode of at least three operating modes the machine is operating in, as the operation-descriptive portion changes to display details of a specific operation being carried out within the one mode, the indicia for each of the three operating modes always being visible to the patient while the machine is operating, the operating mode being selected by the patient touching one of the indicia on the screen.

Abstract: Embodiments to the present invention provide a peristaltic pump. This peristaltic pump includes a flexible flow path, an exterior casing, an elastomeric member, and a number of rollers driven by a motor. The exterior casing and elastomeric member have a first and second annular recess, respectively. An annular flow path guide is formed when the exterior casing and elastomeric member are mechanically coupled. Rollers move along the annular flow path to compress and release the flexible flow path and in so doing draw fluid through the flexible flow patch to achieve pumping action. Mechanical guides proximate to the first annular recess and second annular recess prevent relative motion between the first annular recess and second annular recess ensuring that the flexible flow path remains in place.

Abstract: A method and device for adjusting the unstored length of tubing directed to improving the use of infusion sets that deliver fluids to a user. The device includes a storage module and other features for adjusting, storing and securing the length of the tubing. The method of adjusting the length of the tubing to a desired length typically comprises removably attaching the tubing to the adjuster, adjusting the tubing by wrapping the tubing around a hub or post of the adjuster, and fixing the length of the unstored tubing by attaching the tubing to a securing device such as a friction structure or fastener.

Abstract: A wearable infusion pump assembly includes a reservoir for receiving an infusible fluid, and an external infusion set configured to deliver the infusible fluid to a user. A fluid delivery system is configured to deliver the infusible fluid from the reservoir to the external infusion set. The fluid delivery system includes a volume sensor assembly, and a pump assembly for extracting a quantity of infusible fluid from the reservoir and providing the quantity of infusible fluid to the volume sensor assembly. The volume sensor assembly is configured to determine the volume of at least a portion of the quantity of fluid. The fluid delivery system further includes a first valve assembly configured to selectively isolate the pump assembly from the reservoir, and a second valve assembly configured to selectively isolate the volume sensor assembly from the external infusion set.

Abstract: A wearable infusion pump assembly including a reservoir for receiving an infusible fluid, and a fluid delivery system configured to deliver the infusible fluid from the reservoir to an external infusion set. The fluid delivery system includes a volume sensor assembly configured to receive a quantity of the infusible fluid from the reservoir. The volume sensor assembly includes an acoustically contiguous region having a volume that varies based upon the quantity of infusible fluid received from the reservoir, and an acoustic energy emitter configured to provide acoustic energy at a plurality of frequencies to excite a gas included within the acoustically contiguous region.

Abstract: A dispensing device for dispensing medicaments to a patient that is made up of first and second stand-alone, interconnectable assemblies. The first of these assemblies comprises a fluid reservoir assembly that houses a fluid reservoir defining component while the second assembly comprises a fluid delivery and control assembly that includes a novel flow control means that functions to control the flow of medicinal fluid from the fluid reservoir of the first assembly toward the patient via a plurality of fluid flow control passageways. Because the stand-alone fluid delivery and control assembly is initially totally separate from the fluid reservoir assembly of the apparatus, the fluid flow passageways of the fluid delivery and control assembly can be effectively sterilized using conventional gamma ray sterilization techniques without adversely affecting the medicament contained within the fluid reservoir of the apparatus.

Abstract: An ophthalmic aspiration pump roller-head assembly 10, includes a plurality of rollers 12, a base 16 attached to a first end of the rollers 12, and a face-plate 18 attached to a second end of the rollers 12. The face-plate 18 has at least one groove formed in the face-plate 18 for drawing a tube onto the rollers 12.

Abstract: A self-adjusting fluid pump that includes a piston pump containing at least one piston with a pressure sensor. The fluid pump including at least one fluid-containing pump chamber within the piston pump, adjacent to said piston, wherein advancing the piston causes fluid flow from the pump chamber to a biological destination, and retracting the piston causes fluid to passively till the pump chamber. A microprocessor, senses piston pressure to calculate the rate of fluid input flow into the pump chamber for each pump cycle. If the output flow rate deviates from the input flow rate by a pre-specified value range, the microprocessor adjusts the piston pump to match the output flow rate with the input flow rate by increasing or decreasing stroke rate (piston velocity), stroke volume, or a combination of both.

Abstract: A system including an implantable delivery device having a housing, a reservoir, fill and catheter access ports, and a denial device. The housing maintains the fill port in fluid communication with the reservoir. The catheter access port includes a septum between an inlet and a well. The denial device includes a pin, a biasing element, and a solenoid. The pin is arranged to be movable between a first position in which the pin blocks passage of a needle into the well and a second position, with the biasing element biasing the pin to the first position. The solenoid is operatively coupled to the pin and provides an energized and de-energized states; in the energized state, the solenoid moves the pin from the first position to the second position to permit access to the well. An external controller effectuating clinician control over operation of the denial device is also provided.

Abstract: A device, system and method are disclosed for providing infused medication in a continuous pulse flow at a defined volume and frequency while maintaining a stable and accurate average flow rate, in order to provide improved nerve bathing and thus continuous pain blockage. The system may comprise an external reservoir, such as an infusion bag, and a pulsed flow generation device for generating a controlled pulse of fluid received from the external reservoir and retained in an internal reservoir such as a disposable syringe. One method according to an embodiment of the present invention may comprise receiving a fluid medication, such as an anesthetic substance, from an external reservoir, containing the fluid in an internal reservoir, and when the volume of fluid reaches a certain predefined value, releasing at least one pulse of fluid to create nerve bathing at a treated area.

Abstract: The catheter device comprises a drive shaft connected to a motor, and a rotor mounted on the drive shaft at the distal end section. The rotor has a frame structure which is formed by a screw-like boundary frame and rotor struts extending radially inwards from the boundary frame. The rotor struts are fastened to the drive shaft by their ends opposite the boundary frame. Between the boundary frame and the drive shaft extends an elastic covering. The frame structure is made of an elastic material such that, after forced compression, the rotor unfolds automatically.

Abstract: A medical device includes an interface unit body, which is configured to hold a portion of a flexible infusion tube. A hinge insert is fixed to the interface unit body and is configured to engage a hinge receptacle, which defines a hinge axis, on an infusion pump. A catch insert is fixed to the interface unit body and is configured to lock onto a catch receptacle on the infusion pump upon rotation of the mechanical interface unit about the hinge axis while the hinge insert engages the hinge receptacle, so as to bring the tube into engagement with a peristaltic mechanism of the infusion pump in order to enable the peristaltic mechanism to propel a fluid through the tube.

Abstract: An implantable medication delivery device that is highly space efficient and can reliably and safely deliver controlled medication doses to a target site. The system includes a variable volume medication reservoir that is exposed to an ambient pressure equal to the ambient pressure at a system outlet port. A pump/valve subassembly is provided to draw medication from the reservoir and force a medication dose along a fluid transfer passageway to the outlet port. The pump/valve subassembly incorporates a safety mechanism, e.g., a balanced valve, which normally blocks medication flow to the outlet port and opens only in response to a pump induced unbalancing force. A protective shell is also disclosed for protecting the ambient reservoir.

Abstract: A method of dispensing fluid includes three processes. A first one of these processes includes pumping fluid into a resilient variable-volume dispensing chamber. The dispensing chamber is in series with a normally present finite fluid impedance and an output. The impedance is sufficient so as to cause expansion of the dispensing chamber as it receives pumped fluid even while some fluid flows through the output. Another one of these processes includes repeatedly measuring a parameter related to volume of the dispensing chamber over time. A third one of these processes includes controlling the pumping of fluid based on repeated measurements of the parameter to produce a desired fluid flow through the output. A corresponding system for dispensing fluid implements these processes.

Abstract: A wearable infusion pump assembly includes a reusable housing assembly, and a disposable housing assembly including a reservoir for receiving an infusible fluid. The wearable infusion pump assembly also includes a releasable engagement assembly configured to allow the reusable housing assembly to releasably engage the disposable housing assembly. A switch assembly of the wearable infusion pump assembly is configured to effectuate a functionality of the infusion pump assembly.

Abstract: A dialysis machine includes: (i) a source of peritoneal dialysis solution; (ii) a patient line for passing the peritoneal dialysis solution to the peritoneal cavity of a patient; (iii) a pump for pumping the peritoneal dialysis solution to the peritoneal cavity via the patient line; (iv) a heater for heating the peritoneal dialysis solution prior to the dialysis solution reaching the patient line, the heater including first and second heating elements; (v) a voltage input from a remote power source; and (vi) a control scheme responsive to the voltage input and configured to (a) automatically maintain a proper dialysis solution temperature for the patient via the first and second heating elements regardless of the voltage input wherein the control (b) account for an inlet temperature of the dialysis solution to the heater and (c) account for heater efficiency.

Abstract: An apparatus for delivering fluid at a substantially constant flow rate includes a pair of substantially rigid surface elements for defining a volume that is variable according to constrained separation of the pair of surface elements. The apparatus further includes a support member disposed within the volume defined by the pair of surface elements; and a holding reservoir disposed within the volume defined by the pair of surface elements. The holding reservoir is attachably fastened at a first end to the support member and attachably coupled at a second end to the pair of surface elements.

Abstract: Pump cassettes, wound-treatment apparatuses and methods. In some embodiments, a pump cassette comprises: a pump body having a pump chamber, an inlet valve in fluid communication with the pump chamber, and an outlet valve in fluid communication with the pump chamber; a diaphragm coupled to the pump body such that the diaphragm is movable to vary a volume in the pump chamber; and an identifier configured to store one or more properties of the pump cassette such that the identifier is readable by an automated reader to determine the one or more properties. In some embodiments, the pump cassette is configured to be removably coupled to a wound-treatment apparatus having an actuator such that the actuator can be activated to move the diaphragm.

Abstract: An infusion pump uses an improved shuttle mechanism to more reliably pump liquids in low volumes for medical and other purposes. The improved shuttle uses linear translation and wider, symmetric jaws to grasp infusate tubing and pump liquid infusate through the tubing. Adjustment of the linear motion allows a user to also adjust a pumping volume of the infusion pump. Other shuttles with wider jaws may also pump infusate using a rotary motion. In addition, more than one shuttle, such as two or three shuttles, may be used to approximate continuous pumping. A series of several smaller linear shuttles with sequential actuation may be used as a linear peristaltic pump for general peristaltic pump applications.

Abstract: A compact fluid dispenser for use in controllably dispensing fluid medicaments, such as, antibiotics, analgesics, and like medicinal agents from the device reservoir which is provided in the form of a novel bellows type assembly. The fluid dispenser includes a unique stored energy mechanism which takes the form of a constant force spring member of novel design that provides the force necessary to continuously and substantially uniformly expel fluid from the device reservoir. The device also includes novel adjustable flow rate control assembly that is disposed intermediate the fluid reservoir outlet and the outlet port of the device for precisely controlling the rate of fluid flow from the outlet port toward the patient.

Abstract: A medical fluid infusion system including: a fluid pathway for transporting a pulsatile flow of fluid; a dampening element in communication with the fluid pathway, the dampening element configured to actively dampen pressure fluctuations of the pulsatile flow to smoothen the pulsatile fluid flow, the dampening element operable in any orientation; and a fluid flow sensor disposed along the fluid pathway downstream of the dampening element to measure the flow rate of the smoothened fluid flow.

Abstract: Remote controls, including a communication device, a button or other communication device actuator and a movable structure that allows actuation of the actuator in one position and prevents actuation of the actuator in another position to prevent inadvertent signal transmission.

Abstract: A dialysis system includes a dialysis instrument and a disposable cassette. The dialysis instrument includes three pump actuators. The disposable cassette includes three dialysate pump chambers. The three dialysate pump chambers are positioned and arranged to operate with the three dialysate pump actuators of the dialysis instrument.

Abstract: Embodiments of the invention provide apparatus, systems and methods for delivering drugs using an implantable diaphragm based drug pump which can deliver precisely controlled doses of drug to selected target tissue sites in the brain, digestive system, blood stream heart or other selected site. Various embodiments of the pump include multi-chamber bellows or other diaphragm based pumps which can rapidly deliver drug to the selected target tissue site.

Abstract: In one embodiment, an apparatus comprises a reservoir for containing a fluid, a first actuator, a transfer structure, and a second actuator. The first actuator is configured to exert a first force on the reservoir when moved from a first configuration to a second configuration such that a first volume of fluid within the reservoir is communicated out of the reservoir. The transfer structure is disposed between the first actuator and the reservoir and has a surface configured to engage the reservoir such that the first force exerted by the first actuator is distributed across a surface of the reservoir engaged by the transfer structure. The second actuator is configured to exert a second force on the reservoir when the second actuator is moved from a first configuration to a second configuration such that a second volume of fluid within the reservoir is communicated out of the fluid reservoir.

Abstract: A single-use pumping casing (A) includes an inlet duct (6), a delivery duct (7) and a alternating-movement pumping member (1a), and a driving mechanism including a member (4) for driving the pumping member (1a) in at least one of the alternating movements thereof. The driving mechanism is housed in a holder housing (B) having a wall with a retaining slideway (19) for engaging sliding members of the pumping casing (A), the housing further including a passage opening (21) for the driving member (4), an abutment (20) for determining the position of the pumping casing (A) along the retaining slideway (19) and for placing the pumping member (1a) into a drive relation with the driving member (4), and a removable attachment (19, 20) for attaching the pumping casing (A) in the determined position along the retaining slideway (19).

Abstract: A medical fluid flow control system comprises an interface including a pump actuator port and a pump seal port, a membrane gasket including a pump actuation area and a pump aperture, and a pumping cassette including a flexible sheet and defining a pump chamber, a pump portion of the flexible sheet covering the pump chamber. The pump seal port is operable with the pump aperture to seal the pump portion of the flexible sheet to the pump actuation area of the membrane gasket and the pump actuator port is configured to move the pump portion of the flexible sheet and the pump actuation area of the membrane gasket at the pump chamber of the cassette.

Abstract: The invention relates to a clamp (10) for a flexible tube, in particular an infusion tube, composed of a substantially U-shaped plastic band, the free end (111) of the first branch (11?) of the U being bent over, so as to form the head (11) of the clamp, to the free end (121) of the second branch, called the back (12), in such a way that, in the closed position, the free end (121) of the back (12) is situated resting under the free end (111) of the head (11), whereas, in the opened position, the free end (121) of the back (12) is situated at a distance above the free end (111) of the head (11), the clamp having a pair of openings (114, 134) to allow a flexible tube to extend through the clamp and be supported by the latter, and two opposite projections (113, 123) for obturating the flexible tube by compressing it when the clamp is in the closed position.

Abstract: A disposable cassette intended for a metering pump for infusion consisting of just two components, namely, a hollow first component (1) forming a pump body, and a second component (5) collaborating with the hollow first component (1) to form a pumping zone (6) and comprising a flexible part (10) characterized in that the second component (5) further comprises a rigid part (9) secured to the flexible part (10) and able to be assembled with the hollow first component (1). The invention also relates to a method for manufacturing such a disposable cassette.

Abstract: According to an example embodiment, a delivery device may include a needle and a pump operatively coupled to the needle, the pump having an expanded configuration and a collapsed configuration, the pump being biased to its expanded configuration such that fluid stored in the pump will exit the pump via the needle in response to pressure being applied to the pump, and in response to the pressure being released from the pump, the pump is configured to receive fluid from outside of the delivery device via the needle.

Abstract: A compact, nonelectric fluid dispenser for use in controllably dispensing beneficial agents such as propofol and dexmedetomidine hydrochloride to patients. The dispenser includes a fluid flow control assembly that precisely controls the flow of the medicament solution to the patient and embodies a collapsible drug container that can be filled in the field with the beneficial agents to be delivered to the patient. The unit-dose fluid dispenser of the invention is presented in a sterile and aseptic manner, where the drug has been pre-filled in the system, so that the practitioner cannot mistakenly give the wrong drug to the patient. The dispenser uniquely provides a more efficient medicament delivery system for procedure rooms, such as the endoscopy center, so that a greater number of patients can be treated per day at a higher standard of care with increased profits for the healthcare provider.

Abstract: A medical device includes an interface unit body, which is configured to hold a portion of a flexible infusion tube. A hinge insert is fixed to the interface unit body and is configured to engage a hinge receptacle, which defines a hinge axis, on an infusion pump. A catch insert is fixed to the interface unit body and is configured to lock onto a catch receptacle on the infusion pump upon rotation of the mechanical interface unit about the hinge axis while the hinge insert engages the hinge receptacle, so as to bring the tube into engagement with a peristaltic mechanism of the infusion pump in order to enable the peristaltic mechanism to propel a fluid through the tube.

Abstract: A system to minimize fluid turbulence inside a tissue cavity during endoscopic procedures. A body tissue cavity of a subject is distended by continuous flow irrigation using a solenoid operated pump on the inflow side and a positive displacement pump, such as a peristaltic pump, on the outflow side, such that the amplitude of the pressure pulsations created by the outflow positive displacement pump inside the said tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method for accurately determining the rate of fluid loss into the subject's body system during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate.

Abstract: A powered irrigator for use in rinsing nasal cavities provides a main body having a handle and fluid reservoir detachably coupled to one another, an outlet nozzle extending from a top end of the handle, a pump mechanism operably coupled to a power source, and a switch operably coupled to the power source for turning the pump mechanism on and off, and when the switch turns on the pump mechanism, fluid flows from the fluid reservoir into a first fluid coupling between the reservoir and the pump mechanism and into a second fluid coupling between the pump mechanism to the outlet nozzle.

Abstract: A compact, nonelectric fluid dispenser for use in controllably dispensing beneficial agents such as propofol and dexmedetomidine hydrochloride to patients. The dispenser includes a fluid flow control assembly that precisely controls the flow of the medicament solution to the patient and embodies a collapsible, pre-filled drug container that contains the beneficial agents to be delivered to the patient. The unit-dose fluid dispenser of the invention is presented in a sterile and aseptic manner, where the drug has been pre-filled in the system, so that the practitioner cannot mistakenly give the wrong drug to the patient. The dispenser uniquely provides a more efficient medicament delivery system for procedure rooms, such as the endoscopy center, so that a greater number of patients can be treated per day at a higher standard of care with increased profits for the healthcare provider.

Abstract: A compact, nonelectric fluid dispenser for use in controllably dispensing beneficial agents such as propofol and dexmedetomidine hydrochloride to patients. The dispenser includes a fluid flow control assembly that precisely controls the flow of the medicament solution to the patient and embodies a collapsible, pre-filled drug container that contains the beneficial agents to be delivered to the patient. The unit-dose fluid dispenser of the invention is presented in a sterile and aseptic manner, where the drug has been pre-filled in the system, so that the practitioner cannot mistakenly give the wrong drug to the patient. The dispenser uniquely provides a more efficient medicament delivery system for procedure rooms, such as the endoscopy center, so that a greater number of patients can be treated per day at a higher standard of care with increased profits for the healthcare provider.

Abstract: A tube-positioning system for loading tubing into a peristaltic pump includes a holder and a first tube segment. The holder includes a shell configured to slidably fit onto an exterior of a pump and a pair of guides extending upward from opposite side walls of the shell. The first tube segment has a fixed length and extends between the pair of guides with each end of the first tube segment secured within one of the respective guides.

Abstract: In one aspect, the invention provides methods and apparatus for delivering peritoneal dialysis (PD) solution (or other fluids), from a supply to a patient. A first pump, in fluid coupling with the supply, delivers PD solution from the supply to a “mesne” (or intermediate) measuring element, and generates signals indicative of a volume of that delivered PD solution. The mesne measuring element, in fluid coupling with the first pump, generates signals indicative of a volume of PD solution received from that pump. A second pump, fluidly coupled to the mesne measuring element, routes PD solution from the mesne measuring element for delivery to the patient.

Abstract: A self-contained portable apparatus for administration of a drug solution includes a housing having an enclosure for receiving a flexible pouch containing a drug solution, the output of which is connectable to a conduit for delivering the drug solution to a recipient. A pressurization system is arranged for providing a constant and controllable gas pressure to the housing in order to obtain a controllable delivery of the drug solution. The pressurization system includes a pressure source for delivering positive pressure gas; a pressure accumulation tank connected to the source and the second chamber; a one-way valve arranged between the pressure source and the pressure accumulation tank; and a mechanical pressure regulator arranged between the pressure accumulation tank and the housing. Hereby, an extremely stable and well controllable output pressure and output flow is obtainable.

Abstract: A reservoir for use in a wearable infusion device includes a substantially rigid base having a perimeter, a substantially rigid top having a perimeter, and a flexible rolling diaphragm between the base and the top. The diaphragm has an outer perimeter sealed along the perimeter of the base and an inner perimeter sealed along the perimeter of the top. The diaphragm is arranged to dispose the top and the base immediately adjacent each other when the reservoir is empty and to dispose the top and the base in spaced apart relation when the reservoir is full.

Abstract: A system for controlling administration of medical fluid includes a fluid passageway to which is attached a first flow regulator, a second flow regulator, and a flow detector. The system also includes a controller for controlling the first and second flow regulators in response to a measurement taken by the flow detector of fluid movement in the fluid passageway. The first flow regulator, such as a pump, is configured to maintain fluid movement at flow values greater than an unrestricted flow value. The second flow regulator, such as a variable adjustable valve, is configured to maintain fluid movement at a flow value less than the unrestricted flow value. A method of controlling administration of medical fluid includes obtaining a target flow value, moving fluid through the disposable assembly, taking a measurement of fluid movement in the disposable assembly, and actuating a flow regulating apparatus.

Abstract: A variable hydraulic resistor for use with implantable pumps is disclosed. The variable hydraulic resistor according to the present invention is particularly useful in varying the flow rate of a medication fluid from an otherwise constant flow implantable pump. An implantable pump is also disclosed, which does not require a complicated clinching system or the like, and which may include an undulating membrane and chamber design to reduce the height of the pump.

Abstract: A fluid delivery system includes a fluid container, two or more pressurizing chambers in fluid connection with the fluid container, a drive mechanism in operative connection with the two or more pressurizing chambers to pump fluid from the fluid container and an outlet in fluid connection with the two or more pressurizing chambers. Each of the two or more pressurizing chambers is formed from a flexible, resilient material that is adapted to be compressed to pressurize fluid therewithin.

Abstract: A pump rotor for a roller pump, is disclosed. The rotor comprises: a first roller support comprising a first roller; a second roller support comprising a second roller; an element in the center connected to the first and second roller supports, wherein the first and second roller supports may move angularly with respect to the center element causing distance between the first and second rollers to be varied; first and second positioning elements that connect the first and second roller supports, respectively, to the center element; and first and second spring biased components surrounding first and second positioning elements, respectively, to allow the first and second roller supports to move to allow for automatic adjustment of the rotor.