2816 results about "Fluid control" patented technology

A surgical instrument particularly suited to endoscopic use articulates an end effector by including a fluid transfer articulation mechanism that is proximally controlled. A fluid control, which is attached to a proximal portion, transfers fluid through the elongate shaft through a first fluid passage to a first fluid actuator that responds by articulating an articulation joint. Two opposing fluid actuators may respond to differential fluid transfer to effect articulation. Thereby, design flexibility is achieved by avoiding the design constraints of transferring a mechanical motion through the tight confines of the elongate shaft sufficient to effect articulation.

Each of lines A, B is provided on each of opposite sides thereof with a tape heater 11, and a space for positioning a tape heater holding clip 13 therein is provided in each of locations between adjacent fluid control devices. The tape heaters 11 are held from opposite sides thereof to the line by the clip 13. The lines A, B provided with the heaters are each mounted on a line support member 10 removably attached to a base member 1. The line support member 10 has a heater insertion bore 14 formed therein and extending longitudinally thereof. A sheath heater 12 is inserted into the bore 14.

A three-dimensional microfluidic device (100) formed from a plurality of substantially planar layers (101, 102, 103) sealed together is disclosed

The invention is generally directed to systems and methods for fluid control, and more particularly to systems and methods for power and flow rate control for aspiration. In accordance with one embodiment, an aspiration system includes an aspiration line having distal and proximal ends and an aspiration port defined in the distal end; a fluid transport device operatively coupled to the proximal end of the aspiration line; and a flow restrictor operatively coupled to the aspiration line in between the fluid transport device and the aspiration port. To measure occlusion within the line, first and second pressure sensors are utilized, the first sensor being operatively coupled to the aspiration line between the port and the restrictor and the second sensor being operatively coupled to the aspiration line between the restrictor and the fluid transport device. The pressure differential between the two sensors can provide an indication of the onset, presence, and / or elimination of an occlusion.

This invention is in the field of medical devices. Specifically, the present invention provides portable medical devices that allow real-time detection of analytes from a biological fluid. The methods and devices are particularly useful for providing point-of-care testing for a variety of medical applications.

To provide a fluid control apparatus capable of reducing the space, while reducing the cost.A fluid control apparatus 1 has a fluid controlling unit 2 and a fluid introducing unit 3. The fluid introducing unit 3 is divided into three parts: a first and a second inlet-side shutoff / open parts 5, 6 disposed on the inlet side, each made up of 2×N / 2 on-off valves 23, and a fluid controlling unit-side shutoff / open part 7 made up of 4×M on-off valves 23, disposed between the first and second inlet-side shutoff / open parts 5, 6 and the fluid controlling unit 2.

Systems and methods for monitoring and controlling fluid consumption in a fluid-supply system are disclosed using one or more sensors for generating signals indicative of the operation thereof. In one embodiment, a method of preventing freezing of a conduit for fire suppression fluid in a fire sprinkler system includes sensing, with a temperature sensor, a temperature at a location; and if the sensed temperature falls below a predetermined threshold, sending, to at least one fluid control device interfaced with the conduit, at least one control signal to impede a flow of fire suppression fluid through the conduit.

A surgical stapling and severing instrument enables minimally invasive surgical procedures by having upper and lower jaws (i.e., anvil and staple channel) that are positioned with an elongate shaft and handle through surgical openings, and in particular through a cannula of a trocar. A pair of fluid actuator bladders (lift bags) are positioned in the staple channel beneath a proximally projecting lever tray so that transfer of fluid from the handle causes closing and clamping of the anvil. The bi-directional fluid control may be mechanically produced at the handle or by activating an electroactive polymer actuator. Once firing is sensed, an EAP plunger in a medical substance syringe inserted into the elongate shaft is activated to dispense a medical substance (e.g., anesthetics, adhesives, cauterizing substances, antibiotics, etc.) and is guided along a firing bar to a cutting surface of an E-beam placing the substance on tissue as severed.

The present invention provides a detection article including at least one fluid control film layer having at least one microstructured major surface with a plurality of microchannels therein. The microchannels are configured for uninterrupted fluid flow of a fluid sample throughout the article. The film layer includes an acquisition zone for drawing the fluid sample into the plurality of microchannels at least by spontaneous fluid transport. The film layer also includes a detection zone having at least one detection element that facilitates detection of a characteristic of the fluid sample within at least one microchannel of the detection zone.

Methods and apparatus for implementing microfluidic analysis devices are provided. A monolithic elastomer membrane associated with an integrated pneumatic manifold allows the placement and actuation of dense arrays of a variety of fluid control structures, such as structures for isolating, routing, merging, splitting, and storing volumes of fluid. The fluid control structures can be used to implement a pathogen detection and analysis system including integrated immunoaffinity capture and analysis, such as polymerase chain reaction (PCR) and capillary electrophoresis (CE) analysis. An analyte solution can be input into the device and pumped through a series of immunoaffinity capture matrices in microfabricated chambers having antibodies targeted to the various classes of microbiological organisms such as bacteria, viruses and bacterial spores. The immunoaffinity chambers can capture, purify, and concentrate the target for further analysis steps.

A memory wire actuated control valve comprises a memory wire actuator operatively coupled to a fluid control valve. The memory wire actuator includes a housing having an interior cavity enclosing an electrical platform assembly, an activation wire and a transfer mechanism. The activation wire is formed of a shape memory alloy, often called a “memory wire” or “muscle wire.” The activation wire is electrically connected to the electrical platform and mechanically coupled to the transfer mechanism. The actuator is activated by conducting electrical current through the activation wire causing the wire to contract thereby actuating the transfer mechanism. The transfer mechanism is operable coupled to the fluid control valve such that actuated and de-actuating the transfer mechanism open and closes the valve.

The present invention provides a bi-directional ball seat and method of use. In at least one embodiment, the present invention provides a fluid control system that includes a radial protrusion that can be selectively engaged and disengaged upstream and / or from a ball seat. For example, a ball can be placed in a passageway, engaged with a downstream ball seat, and the radial protrusion radially extended into the passageway distally from the seat relative to the ball. A reverse movement of the ball is restricted by the active radial movement of the radial protrusion into the passageway. The control system can be used to control a variety of tools associated with the well. Without limitation, the tools can include crossover tools, sleeves, packers, safety valves, separators, gravel packers, perforating guns, decoupling tools, valves, and other tools know to those with ordinary skills in the art.

The present invention relates to the medical field, in particular relates to the practice of percutaneous vertebroplasty where a pair of syringes in the distal extreme of a lengthened hydraulic device, are united by a camera of intermediate connection of larger diameter (pressure exerting body) or modified inverted syringe tube with a bolster, a hydraulic connecting tube of flexible material that transmits the pressure of the smaller diameter manual or impulsion syringe in the proximal extreme of the device toward the intermediate cylindrical larger diameter camera (pressure exerting body), this camera is in an inverted position with regard to the first syringe (fluid control), this intermediate camera has a moving piston longitudinal to the axis of the cylinder that is controlled with the first syringe (manual) and in cooperation with the atmospheric pressure. The injecting syringe loaded with bone cement is coupled with the bolster of the body of pressure, and to the needle that drives the cement toward the interior of the bone. The intermediate camera (pressure exerting body) together with the hydraulic tube and the manual syringe form a hydraulic press system (F / A=f / a) that allows to increase in a potential way the pressure exerted in the first syringe and to make the injection of polymethylmethacrylate (PMMA) at an approximate distance of 1.0 m to 1.5 m.

A connector apparatus for controlling fluid dispensing / transmission that includes a control component for communication between couplers thereof. A first coupler has a transmitter, and is releasably connected with a mating reader coupler that has a transmitter and fluid control device to exchange information with the transmitter of the first coupler. The transmitters communicate and are operated by wireless means such as by RF devices. Upon confirming that the first coupler is properly coupled to the mating coupler and that the first coupler has a proper identification, the fluid control device controls fluid flow, using the transmitters of the first coupler and the mating reader coupler, under predetermined parameters, e.g., pressure, temperature, duration, and flow rate, as indicated in the first coupler.

The mobile fluid delivery system includes a mobile pedestal and a fluid delivery superstructure detachably connected to the pedestal. The fluid delivery superstructure includes a pump device and a fluid control device. A fluid path set operatively associates the pump device with the fluid control device. The superstructure is further adapted to detachably connect to a patient examination platform. A rail mount is used to provide the interface between the superstructure and the patient examination platform. The rail mount attaches to a rail of the patient examination platform and includes a main body defining an elongated recess for engaging the rail of the patient examination platform. The superstructure detachably connects to the main body. Locking devices are used to secure the rail mount to the patient examination platform and the superstructure to the rail mount. A spacer may be inserted into the elongated recess to accommodate different sized rails.

A massage device for massaging a body part of a person in an unsupervised and unattended setting. The massage device includes a garment, shaped to provide a snug fit and having a plurality of bladders arranged along the garment to massage the body part. An inflation assembly supplies fluid pressure to each of the bladders to inflate the respective bladders. The bladders may have approximately the same inflated volume thereby equalizing the inflation volume of the respective bladders whereby substantially even inflation timing, with substantially even applied pressure, and, thus, overall smooth massage dynamics may be provided without overly complicated inflation fluid control (e.g., an inflation assembly which supplies a substantially constant inflation capacity to each of the bladders). The garment may include a pocket having an opening communicating with the respective bladders and tubing from the inflation assembly extends into this pocket. The inflation assembly may provide throttled deflation flow, tapered inflation / deflation patterns, and / or a zone selector which allows a user to select a certain zone of the garment.

A sprinkler assembly for controlling a fire situation includes at least one fluid conduit defining a flow passage including an inlet for receiving a fluid from a fluid source and at least one outlet for discharging the fluid, and a dispensing mechanism such as an open or closed sprinkler head for distributing water to a selected location. A fluid control apparatus is provided including a valve assembly having a valve seal which is moveable between a closed position blocking fluid flow through the conduit and an open position causing fluid flow through the conduit. The fluid control apparatus further includes an actuating mechanism including a valve actuator which is operatively connected to the valve assembly for causing movement of the valve seal to the open position upon release of the sealing force. A sensing mechanism is operatively connected to the valve assembly, the sensing mechanism being thermodynamically responsive to at least one of heat, smoke, infrared radiation and ultraviolet radiation emitted by a heat source.

A surgical instrument particularly suited to endoscopic use articulates an end effector by including a fluid transfer articulation mechanism that is proximally controlled. A fluid control, which is attached to a proximal portion, transfers fluid through the elongate shaft through a first fluid passage to a first fluid actuator that responds by articulating an articulation joint. Two opposing fluid actuators may respond to differential fluid transfer to effect articulation. Thereby, design flexibility is achieved by avoiding the design constraints of transferring a mechanical motion through the tight confines of the elongate shaft sufficient to effect articulation.

A fluid control and processing system for controlling fluid flow among a plurality of chambers comprises a body including a fluid processing region continuously coupled fluidicly with a fluid displacement region. The fluid displacement region is depressurizable to draw fluid into the fluid displacement region and pressurizable to expel fluid from the fluid displacement region. The body includes at least one external port. The fluid processing region is fluidicly coupled with the at least one external port. The fluid displacement region is fluidicly coupled with at least one external port of the body. The body is adjustable with respect to the plurality of chambers to place the at least one external port selectively in fluidic communication with the plurality of chambers. One or more of the chambers may be a processing chamber which includes two ports configured to selectively engage the at least one external port of the body, and a fluid processing material such as an enrichment material or a depletion material. In some embodiments, one or more chambers may include a separation channel, and an electric field may be applied across the separation channel.

The present invention is an automated microfluidic chip processing apparatus that includes a deck for holding at least one microfluidic chip and capable of being accessed by a liquid handling system, a fluid control system, and a detection system, wherein a chip handling device transports the chip from the deck to the fluid control system and the detection system. The present invention also includes a chip for use with an automated microfluidic chip processing apparatus, and a method for processing a microfluidic chip using such an apparatus.

A device configured to treat a human or animal body part or limb by providing a heating and / or cooling effect in addition to a compressive force. A metallic conductive material is positioned in thermal contact with at least one Peltier cell whereby the heating and cooling effect generated at an active face of the Peltier cell is conducted and distributed over the surface area of the conductive material. The conductive material comprises a significantly greater surface area than the active face of the Peltier cell. A compressive force may be applied to the human or animal body part or limb by the control of a fluid into an expandable sack secured with the conductive material to the body part by suitable strap means.

A fluid ducting assembly for enabling flow communication between a syringe and either one of a vessel and a dispenser for dispensing a fluid contained, a priori in the syringe or in the vessel. The fluid ducting assembly includes a base having a first member, a second member, and a third member for connection to and providing flow communication with the syringe, the vessel and the dispenser, respectively. The fluid ducting assembly further includes a flow controller within the base enabling any one of a flow path between the first member and the second member and a flow path between the first member and the third member. The flow controller has either a first operative position in which the flow path between the first member and the second member is enabled or a second operative position in which the flow path between the first member and the third member is enabled. The flow controller being readily switchable from its first operative position to its second operative position but not readily switchable from its second operative position to its first operative position.

The present invention provides apparatus and methods for controlling flow dynamics of a plating fluid during a plating process. The invention achieves this fluid control through use of a diffuser membrane. Plating fluid is pumped through the membrane; the design and characteristics of the membrane provide a uniform flow pattern to the plating fluid exiting the membrane. Thus a work piece, upon which a metal or other conductive material is to be deposited, is exposed to a uniform flow of plating fluid.

The present invention generally provides improved medical devices, systems, and methods. Embodiments may be particularly well suited for the treatment of dermatological and / or cosmetic defects, and alternative embodiments may be configured for treatment of a wide range of target tissues. Some embodiments of the present invention apply cooling with at least one small, tissue-penetrating probe, the probe often comprising a needle having a size suitable for inserting through an exposed surface of the skin of a patient without leaving a visible scar. The cooling may remodel one or more target tissue so as to effect a desired change in a composition of the target tissue and / or a change in its behavior. Exemplary embodiments make use of replaceable needle probes supported by a probe body handle, with small needle probes often being replaced during treatment of a single patient. Unlike the large format cryogenic cooling systems of the past, small cryogenic cooling needle probes may dull or be damaged by insertion. Careful control over the control of cryogenic cooling fluid into a needle probe can allow the length of the active cooling to be controlled through depletion of liquid from an evaporating cryogenic cooling flow. Hence, even needles having similar external structures may provide differing lengths of an iceball along the needle axis. Surprisingly, small cryogenic cooling needles and / or other cryogenic cooling probes having a lubricious coating will allow safe removal of the probe from the treatment region while at a least a portion of the tissue remains frozen, significantly decreasing the overall time for a procedure involving many insertion / freeze / removal cycles.