56 results about "Fluid volume" patented technology

The invention relates to a method for determining a total fluid volume flow (1) in the region of an implanted vascular support system (2), comprising the following steps: a) determining a reference temperature (3) of the fluid, b) determining a motor temperature (4) of an electric motor (5) of the support system (2), c) determining the thermal dissipation loss (6) of the electric motor (5), d) ascertaining the total fluid volume flow (1) using the reference temperature (3), the motor temperature (4), and the thermal dissipation loss (6) of the electric motor (5).

The invention relates to a method for determining a fluid volume flow (1) through an implanted vascular support system (2), comprising the following steps: a) determining a fluid temperature parameter in the region of a cannula (4) of the support system (2), b) operating a heating element (5) which can bring about a change in a fluid temperature in the cannula (4), c) determining the fluid volume flow (1) using at least the fluid temperature parameter or the change thereof and at least one heating element operating parameter or the change thereof. The invention also relates to a vascular support system.

A fluid damper having a damper housing with a first and a second fluid volume, and a damping piston located within the damper and separating the first and second fluid volume. The damper piston has a piston fluid pathway formed therethrough and between the first and second fluid volume. The fluid damper includes a fluid accumulator having an accumulator fluid volume. The fluid damper has a first fluid pathway extending between the first fluid volume and the accumulator fluid volume, and the fluid damper has a second fluid pathway extending between the second fluid volume and the accumulator fluid volume. A flow control valve is located in at least one of the first and the second fluid pathways, and the flow control valve has a non-zero threshold value.

The invention discloses a low-temperature liquid cavitation numerical prediction method considering different-scale heat effects, and belongs to the field of low-temperature liquid cavitation numerical prediction. The implementation method comprises the steps that a corresponding fluid domain geometric model is established, grids are divided, a computational fluid mechanics model is established under the macro-scale, a separation vortex DES turbulence model is adopted, a fluid volume VOF model is used for capturing a macro-scale cavity interface, and convective heat transfer correction under the macro-scale is conducted on a cavitation model; establishing a cavitation kinetic equation considering heat conduction correction under the mesoscale, solving resistance, volume force, additional mass force, pressure gradient force and lift force suffered by the mesoscale discrete cavitation by using a DBM discrete phase model, and obtaining a movement track of the discrete cavitation in a cavitation flow field; and calculating the unsteady cavitation flow by taking a steady result as an initial value to obtain a flow field characteristic under a macroscale and a discrete cavitation dynamic evolution process under a mesoscale, thereby realizing quantitative description and high-precision numerical prediction of the unsteady cavitation flow.

A single use pouch device for carrying and subsequently dispensing a single use volume of a viscous skin treatment includes a pouch which contains a viscous skin treatment. The pouch has a total fluid volume sufficient to contain a pre-determined volume of the viscous skin treatment to cover a user's hands and arms. A first opening means is integrated into the pouch which enables a corner of the pouch to be removed thereby enabling the viscous skin treatment to be dispensed through the removed corner in a controlled manner. A second opening means is integrated into the pouch which enables the pouch to be divided thereby enabling the viscous skin treatment to be removed from the pouch. In this way the user can remove a maximum volume of the viscous skin treatment from the pouch.

The invention relates to the technical field of fracturing, in particular to a method and device for determining the mixing proportion of fracturing fluid, a medium and a product, and the method comprises the steps that the fluid injection amount of a target stratum is determined based on a relational expression between an engineering dessert coefficient and a sand-fluid ratio, a relational expression between the sand-fluid ratio and the fluid injection amount and a stratum engineering dessert coefficient; determining the ultra-high viscosity slick water liquid amount from the turning point of the ultra-high viscosity slick water liquid amount of the fractured section; based on the turning point ratio of the high-viscosity slick water to the low-viscosity slick water, the liquid injection amount of the target stratum and the liquid amount of the ultra-high-viscosity slick water, the liquid amount of the high-viscosity slick water and the liquid amount of the low-viscosity slick water are obtained; according to the method, the proportion of slick water with different viscosities can be determined more scientifically, uncertainty caused by trial and error and blind reference to adjacent wells is avoided, and the method has positive effects on optimizing fracturing construction parameters, increasing fracturing volume, reducing fracturing cost and improving fracturing efficiency.

A fluidic pump test device includes a fluidic pump, a pressure influencing device, and an evaluation device. The fluidic pump is configured to be driven by a drive device. The fluidic pump is configured such that a rotational speed of the fluidic pump, which leads to a fluid volumetric flow on an output side of the fluidic pump, is known. The pressure influencing device is configured to: (i) conduct, at least temporarily, the fluid volumetric flow; and (ii) during operation of the fluidic pump, bring about a pressure drop. The evaluation device is configured to, based on a decrease of the pressure drop, determine a reduction in a functional capability of the fluidic pump.

A medicinal infusion system includes a safety valve for isolating residual medication by providing a single point of fluidic disconnect to encapsulate a residual fluid volume prone to spillage. The safety valve couples a medicinal repository such as an infusion pump to a medicinal supply, typically from a syringe or tubing. The safety valve includes a resilient, deformable, or hinged surface for isolating and sealing the medicinal flow to eliminate and / or isolate any residual volume in tubing and connectors. The isolating surface accommodates an inserted fitting or coupling for allowing the medicinal flow to fill the infusion pump. Upon disconnection, fluids on either side of the safety valve are therefore isolated on the respective fill or source sides, and residual volume prone to spillage is eliminated.

The application discloses a switchable gas detection device and method for a gas-liquid two-phase flow pipeline, which comprises a main pipeline, a container, a first baffle plate, a first bypass pipeline, a second bypass pipeline, a first valve, a second valve, a flowmeter and a water supplement valve. The container is divided into a first cavity and a second cavity by the first baffle plate, and a gap is left between the first baffle plate and the inner bottom wall of the container. The main pipeline is connected with the first cavity through the first bypass pipeline, and the second cavity is connected with the main pipeline through the second bypass pipeline. The first valve is arranged on the first bypass pipeline, the second valve and the flowmeter are arranged on the second bypass pipeline, and the water supplement valve is arranged on the top of the container and connected with the container. The application realizes the natural separation of gas and fluid based on the density difference between gas and liquid, does not need to additionally configure a separation device, has the advantages of simple structure and low cost, can analyze the composition of the separated gas, and can directly record the volume of the gas and the volume of the fluid in unit time after separation. The volume of the gas is divided by the volume of the fluid, so that the proportion of the gas can be calculated.

A system for measuring changes in a fluid stored within a container is disclosed. The system may include a radio-frequency sensing element disposed externally on the container and configured to generate a signal indicative of at least one dielectric property of the fluid, wherein the fluid undergoes composition-based or environment-driven changes due to interactions with the container. In some aspects, a processing component generates an output representative of at least one time-varying fluid characteristic. In some aspects, the container is a wooden barrel with an interior surface adapted to impart flavor or chemical changes to the fluid. In some aspects, the fluid is a beverage including at least one of wine, beer, and distilled spirits, with the time-varying characteristic including a fermentation parameter that changes over time. In some aspects, the at least one time-varying fluid characteristic of the fluid includes at least one of fluid level or fluid volume.

This invention discloses a gas-liquid two-phase flow measurement system and its usage method. The measurement system includes a gas-liquid separation module, a fluid volume measurement module, a gas volume measurement module, a video monitoring module, and a control system. The liquid outlet of the gas-liquid separation module is connected to the fluid volume measurement module. The gas volume measurement module includes a gas drying unit and a gas extraction unit, and the gas outlet of the gas-liquid separation module is sequentially connected to the gas drying unit and the gas extraction unit. The video monitoring module is set up corresponding to the gas-liquid separation module and is used to monitor the liquid level changes in the gas-liquid separation module in real time. The control system is communicatively connected to the fluid volume measurement module, the gas volume measurement module, and the video monitoring module. This invention realizes online, automatic, and high-precision cyclic measurement of gas and liquid two-phase volumes, can effectively analyze water vapor content, and is adaptable to various working conditions, showing broad application prospects in fields such as oil and gas reservoir exploration and development experiments.

A method of detecting a fault condition in an infusion process, the method includes receiving a programmed flow rate pertaining to a fluid infusion provided by an infusion device; determining, a first weight of an infusion container associated with the fluid infusion provided by the infusion device at a first time; determining a second weight of the infusion container at a second time; determining based on the first weight and the second weight, a determined flow rate of the fluid infusion provided by the infusion device between the first time and the second time. The method includes determining a difference between the determined flow rate and the programmed flow rate. When a magnitude of the difference between the determined flow rate and the programmed flow rate satisfies a predetermined threshold, by the processor: causing an output of the infusion device or the weight sensor to indicate the fault condition.

The invention relates to a diaphragm valve (1) for controlling a fluid medium, comprising a solenoid armature (10) which is arranged to be longitudinally movable in an interior space (31) of a pole tube (30) which is closed by a diaphragm (20) and which is connected with the diaphragm (20) in such a way that the diaphragm (20) is configured to be transferred by a longitudinal displacement of the solenoid armature (10) between a closed position in which the solenoid armature (10) pushes the diaphragm (20) onto a sealing seat (41) and closes a fluid passage (42), in particular a fluid inlet (43), and an open position in which the solenoid armature (10) lifts the diaphragm (20) from the sealing seat (41) and opens the fluid passage (42), in particular the fluid inlet (43). The invention is characterized in that the interior space (31) of the pole tube (30) contains a fluid (32) which represents a fluid volume and a gas (33) which represents a gas volume, wherein the fluid volume is greater than the gas volume.

A magnetically coupled precise liquid balance unit and a magnetically coupled precise liquid balance control device include an injection cylinder (1-1), a magnetically coupled driven component (1-2), and a magnetically coupled active component (1-3). The first end of the injection cylinder (1-1) has a first fluid inlet / outlet (1-4), and the second end of the injection cylinder (1-1) has a second fluid inlet / outlet (1-5). The magnetically coupled driven component (1-2) is located inside the injection cylinder (1-1) and divides the cavity of the injection cylinder (1-1) into a first inlet / outlet fluid cavity (1-6) and a second inlet / outlet fluid cavity (1-7). The magnetically coupled active component (1-3) is located outside the injection cylinder (1-1). The magnetically coupled active component (1-3) and the magnetically coupled driven component (1-2) interact with each other through magnetic force, and when the magnetically coupled active component (1-3) moves, it drives the magnetically coupled driven component (1-2) to reciprocate within the injection cylinder (1-1) through magnetic force. This magnetically coupled precision liquid balance unit can reduce the difference in fluid volume between the human body and the fluid during a single replenishment, greatly extending the continuous and reliable working time of the magnetically coupled precision liquid balance unit and the magnetically coupled precision liquid balance control device.

The present application relates to the technical field of oil and gas exploration and development, and discloses a method for determining gas-gas relative permeability curve in CO2 injection and CH4 displacement process.The present application establishes an experimental test and mathematical processing method for gas-gas two-phase seepage mechanism by regarding supercritical CO2 and CH4 as two independent fluids, aiming at the blank of lacking effective gas-gas relative permeability determination means in the prior art.The method comprises the following steps: core and fluid preparation, CH4 saturation, and CO2 injection and displacement test.The key of the method is as follows: the gas chromatograph is used to monitor the output gas components in real time, so that the components can be finely metered;the high temperature and high pressure volume correction mathematical model is introduced to convert the ground measurement value into the fluid volume under the formation condition;and the double gas permeability calculation and saturation normalization processing model is constructed to realize quantitative and accurate determination of the gas-gas relative permeability curve.The present application solves the problems that the components are difficult to distinguish and the relative permeability parameters are difficult to obtain in the gas displacement process, and provides high-precision basic data for dynamic evaluation of the reservoir gas displacement.

Pipetting device (1) for taking up and dispensing fluid volumes, comprising - a housing (2) with a base body (3) enclosing a cavity (5) and having an inner side (6) bounding the cavity (5), an outer side (7) and an opening (8), and - an assembly (15) comprising several components of the pipetting device (1), wherein the assembly (15) can be inserted into the cavity (5) of the base body (3) through the opening (8) of the base body (3) for assembly and is arranged in the cavity (5) of the base body (3) in the assembled state and is detachably attached to the base body (3), wherein a first guide device (16) is formed on the inside (6) of the base body (3), wherein the first guide device (16) has a guide rail (20) for guiding the assembly (15) during the assembly of the assembly (15), wherein a second guide device (17) is formed on the assembly assembly (15) and wherein at least temporarily during the assembly of the assembly unit (15) and in the assembled state of the assembly unit (15) the first guide device (16) engages with the second guide device (17).

The present teachings generally include devices, systems, methods, and computer program products for determining a fluid state of a patient using bioimpedance measurements or the like. In general, aspects of the present teachings may include one or more of the following: an eight-point electrode bioimpedance device comprising two (wired or wireless) handles with integrated sensors to measure distance, e.g., to enable measurement of body height and segment length; a technique for determining the fluid state of the patient from bioimpedance measurements of the patient's legs; improved techniques for determining fluid overload (or determining fluid state) using the ratio of extracellular volume (ECV) to total body moisture (TBW); and determining a fluid state and / or a fluid volume using the body segment resistance.

This application relates to thermodilution injection fluid measurement and control. Apparatus and methods for measuring, controlling (or both) the thermodilution injection fluid flow rate used to calculate a thermodilution pulmonary parameter. An injection fluid delivery system includes a syringe for containing injection fluid and a delivery tube configured at one end to connect to a catheter. A flow measurement device is inserted into the delivery tube to generate a signal used to determine the flow rate of fluid from the syringe to the catheter. A processor receives the signal from the flow measurement device and calculates the injection fluid volume to be used as an input for calculating a thermodilution pulmonary parameter such as cardiac output. A GUI is provided to guide the user as to whether the injection rate is too fast or too slow. The system can include a constant flow valve to provide a constant flow rate from the syringe rather than measuring or calculating the flow rate.

The invention discloses a gingival sulcus fluid sampling and quantifying device and method based on parallel-plate capacitor capacitance value change, the device comprises a parallel-plate capacitor unit and a measuring unit, the method utilizes the characteristic that the dielectric constant of liquid is far greater than that of air, and when a sampling brush absorbing liquid is inserted between metal polar plates of the parallel-plate capacitor unit, the capacitance value can be obviously changed; by establishing a standard curve between the capacitance value and the liquid volume, rapid, accurate and non-destructive measurement of the micro gingival sulcus liquid volume is realized; the device is simple in structure, low in cost, simple, convenient and rapid in method, suitable for clinical quantitative analysis of the gingival sulcus fluid volume and high in precision and sensitivity; through comparison with the real volume, the correlation between the predicted volume and the actual volume exceeds 95%; in addition, clinical application shows that the method can effectively distinguish gingival crevicular fluid amounts of different periodontal states, and has high clinical popularization value.

The application relates to the technical field of pressure detection, and discloses a pelvic floor pressure detection device, which comprises a first flexible capsule, a first pressure detection device, a first pressure regulating component and a controller. The first pressure detection device and the first pressure regulating component are connected with the first flexible capsule respectively. The first pressure detection device is used for detecting the pressure in the first flexible capsule. The first pressure regulating component is used for adjusting the fluid volume of the first fluid in the first flexible capsule so as to adjust the pressure in the first flexible capsule. During the detection process, the controller is used for controlling the first pressure regulating component to adjust the fluid volume of the first fluid in the first flexible capsule until the preset stop condition is met. During the detection process, the controller is also used for acquiring the fluid volume of the first fluid in the first flexible capsule and the detection pressure of the first pressure detection device, and compensating the detection pressure based on the fluid volume of the first fluid, so as to determine the pelvic floor pressure. The application can solve the problem of inaccurate pelvic floor pressure detection.

The application provides a telescopic gas-water isolation equipment indoor test device and test method, relates to the field of energy storage component testing, and aims at the problem that it is difficult to perform gas-water coupling dynamic environment simulation test on the gas-water isolation equipment at present. Through parallel arrangement of upper water pipelines and lower water pipelines with independent control valves and flow sensors between the low-position water tank and the high-position water tank, and in combination with the displacement sensor arranged on the outer wall of the low-position water tank, the gas pressure regulating expansion and the linear elongation of the gas-water isolation equipment to the directional flow process of the water body are realized, the gas-water coupling dynamic environment is simulated, the accuracy of the measured data is improved, the volume change amount of the gas-water isolation equipment in the closed water area can be accurately measured through the external displacement sensor, and cross verification with the fluid volume of the upper water pipeline and the lower water pipeline is performed in real time, so that the authenticity of the parameter collection of the compressed air driving water body working process and the accuracy of the data mapping are improved.

Patient fluid management systems, particularly for use in treating patients at various stages of heart failure, are disclosed. Disclosed systems employ vascular dimension monitoring sensors to provide accurate, early, real-time estimation of circulating blood volume as an input metric to the system control, allowing for more accurate modulation of treatment based on the patient's current fluid volume state.

The microelectromechanical component (1) has a housing (2) with a carrier (3), a cover (5) and a displacement structure (8) arranged in the housing (2). The displacer structure (8) has a bottom wall (9), a top wall (10), a side wall (11) and a plurality of displacer walls (12) which extend between the bottom wall (9) and the top wall (10), are parallel to one another and run perpendicular to the side wall (11), are movable, and delimit a plurality of volume chambers (13) of the displacer structure (8). According to the invention, the displacement device structure (8) has at least one movable coupling element (14) which is mechanically and fixedly connected to the movable displacement device wall (12) and which is formed at least in sections by the bottom wall (9) and / or by the top wall (10) and / or by the side walls (11) and which can be moved in such a way that the displacement device structure (8) can be moved at least in sections by the bottom wall (9) and / or by the top wall (10) and / or by the side walls (11). The movable displacement device wall (12) can be moved in a direction parallel to the carrier (3) and perpendicular to the movable displacement device wall (12).

The utility model discloses a multifunctional water-gas mattress, and belongs to the technical field of sleeping articles. The top of each bag cavity is composed of one or more human body containing parts; the capsule cavities at least comprise a first capsule cavity and a second capsule cavity; the second bag cavity is wrapped by the first bag cavity; the first bag cavity and the second bag cavity are filled with first fluid and second fluid respectively so that the second bag cavity can float in the first bag cavity. The first bag cavity and the second bag cavity are respectively provided with a fluid injection port; the first bag cavity and the second bag cavity are both made of airtight foldable non-rigid materials. Wherein the second bag cavity is of a structure with a multidirectional free bending function and can be freely bent under any air pressure, sufficient wrapping is provided for the human body, and meanwhile the stress area is increased, so that the stress on the body is reduced, and the sleep quality is improved. The volume of fluid in different bag cavities is adjusted by adjusting the fluid in and out of the fluid injection port, and the temperature of the mattress is adjusted through the temperature of the fluid. According to the utility model, the technical effect of improving the use convenience and the comfort level is achieved.

A pipetting device for taking up and dispensing fluid volumes. The pipetting device has a displacement apparatus having a displacement device and a displacement housing. The pipetting device further includes a drive device for moving the displacement device in the displacement housing, wherein movement of the displacement device is limited by an upper stop, a lower stop, and at least one counter stop of the drive device, so that a stroke of the displacement device is defined. The pipetting device further has an adjustment indicator for indicating an adjustment value of the stroke of the displacement device. In an adjustment state, the stroke of the displacement device is adjustable, and the adjustment indicator is adjustable. In a state of use, the stroke of the displacement device is adjustable and the adjustment indicator is fixed.

Patient fluid management systems, particularly for use in treating patients at various stages of heart failure, are disclosed. Disclosed systems employ vascular dimension monitoring sensors to provide accurate, early, real-time estimation of circulating blood volume as an input metric to the system control, allowing for more accurate modulation of treatment based on the patient's current fluid volume state.

Improvements to fluid volume measurement systems are described for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular; the pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being designed using a combination of adiabatic, isothermal, and polytropic processes; real-time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also described, in this case using an ideal gas model of one chamber and using a high-speed processor to obtain and process the pump control chamber pressures during fluid flow into or out of the pump chamber;Also described is an improved heater control circuit system to provide added or redundant safety measurements or to reduce current leakage from a heater element during pulse-width modulation control of the heater; improvements are also described in the application of negative pressure during a drainage phase in peritoneal dialysis therapy and to control the amount of intraperitoneal fluid accumulation during therapy; improvements are also described in the efficiency of fluid movement into and out of a two-pump heater cassette and bag of a peritoneal dialysis cycler and in the synchronization of the operation of two or more pumps in a peritoneal dialysis cycler or other fluid handling devices that use a multi-pump arrangement.

The invention relates to a medical apparatus designed to receive a detachable fluid-conducting first line portion (3). The medical apparatus comprises a second line portion (2) designed to be connected to the first line portion (3), wherein a movable element (38) is situated in the second line portion (2), by means of which movable element the second line portion (2) is separated into a first sub-portion (2a) and a second sub-portion (2b). In addition, the medical device comprises: at least a first and a second blocking element (7, 8) for enclosing a fluid volume in the first line portion (3) and the second line portion (2); and a pump (6) for generating a vacuum in a first of the two sub-portions (2a, 2b) of the second line portion (2), as a result of which elastic deformation takes place in and / or on the second of the two sub-portions (2a, 2b) and the movable element (38) is moved; and a controller for controlling the pump (6), wherein the controller is programmed, in a disconnection mode, to operate the pump (6) to generate the vacuum.