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6775 results about "Positive pressure" patented technology
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Positive pressure is a pressure within a system that is greater than the environment that surrounds that system. Consequently, if there is any leak from the positively pressured system it will egress into the surrounding environment.
High convection home hemodialysis/hemofiltration and sorbent system
InactiveUS20050131332A1Easily set up sterile blood therapy systemImprove efficiencySemi-permeable membranesHaemofiltrationPositive pressureSorbent
A system, method and apparatus for performing a renal replacement therapy is provided. In one embodiment, two small high flux dialyzers are connected in series. A restriction is placed between the two dialyzers in the dialysate flow path. The restriction is variable and adjustable in one preferred embodiment. The restriction builds a positive pressure in the venous dialyzer, causing a high degree of intentional backfiltration. That backfiltration causes a significant flow of dialysate through the high flux venous membrane directly into the patient's blood. That backfiltered solution is subsequently ultrafiltered from the patient from the arterial dialyzer. The diffusion of dialysate into the venous filter and removal of dialysate from the arterial dialyzer causes a convective transport of toxins from the patient. Additionally, the dialysate that does not diffuse directly into the patient but instead flows across the membranes of both dialyzers provides a diffusive clearance of waste products.
Owner:BAXTER HEALTHCARE SA +1
Compact low noise efficient blower for CPAP devices
Owner:RESMED MOTOR TECH
Method and apparatus for providing positive airway pressure to a patient
InactiveUS6105575AReduce cardiac preloadEasily detecting exhalationRespiratorsOperating means/releasing devices for valvesMedical disorderPositive pressure
A system including methods and apparatus for treatment of a medical disorder such as obstructive sleep apnea or congestive heart failure. The system involves applying separate and independent gains to flow rates of pressurized gas delivered to a patient during inspiratory and expiratory phases of a respiratory cycle to deliver the pressurized gas in proportion to the respective gains during inspiration and expiration. A base pressure may be applied in addition to the gain-modified pressures and an elevated pressure profile may be employed to assist or control inspiration. The system may be fully automated responsive to feedback provided by a flow sensor that determines the estimated patient flow rate. A leak computer can be included to instantaneously calculate gas leakage from the system. The system may be utilized in connection with conventional continuous positive airway pressure (bi-level PAP) equipment to effect various beneficial treatment applications.
Owner:RIC INVESTMENTS LLC
Blower with bearing tube
Owner:RESMED MOTOR TECH
Internally pressurized medical devices
There are provided pressurized surgical instruments for use in pressurized surgical environments. The pressurized surgical instruments include pressurizing systems for maintaining a neutral or positive pressure flow within the surgical instrument during use. The pressurizing systems include a primary sensor for detecting the pressure of the surgical environment and a pressurizing mechanism for balancing the pressure of the surgical instrument with the surgical environment. The pressurizing mechanism includes a controller to receive and compare the signal sent from the primary sensor to the ambient or internal instrument pressure and a pressure delivery system to provide positive pressure to the interior of the surgical instrument in response to a signal received from the controller. The sources of pressure for the pressure delivery systems may be external or self contained within the surgical instrument.
Owner:TYCO HEALTHCARE GRP LP
Method and apparatus for minimizing contamination in semiconductor processing chamber
ActiveUS8287648B2Liquid surface applicatorsSemiconductor/solid-state device manufacturingPositive pressureControl system
A semiconductor processing apparatus includes a reaction chamber, a loading chamber, a movable support, a drive mechanism, and a control system. The reaction chamber includes a baseplate. The baseplate includes an opening. The movable support is configured to hold a workpiece. The drive mechanism is configured to move a workpiece held on the support towards the opening of the baseplate into a processing position. The control system is configured to create a positive pressure gradient between the reaction chamber and the loading chamber while the workpiece support is in motion. Purge gases flow from the reaction chamber into the loading chamber while the workpiece support is in motion. The control system is configured to create a negative pressure gradient between the reaction chamber and the loading chamber while the workpiece is being processed. Purge gases can flow from the loading chamber into the reaction chamber while the workpiece support is in the processing position, unless the reaction chamber is sealed from the loading chamber in the processing position.
Owner:ASM IP HLDG BV
Treatment of tissue in sphincters, sinuses and orifices
Owner:NOVASYS MEDICAL
Method and apparatus for minimizing contamination in semiconductor processing chamber
ActiveUS20100202860A1Maintain gapCreate sealLiquid surface applicatorsSemiconductor/solid-state device manufacturingPositive pressureControl system
A semiconductor processing apparatus includes a reaction chamber, a loading chamber, a movable support, a drive mechanism, and a control system. The reaction chamber includes a baseplate. The baseplate includes an opening. The movable support is configured to hold a workpiece. The drive mechanism is configured to move a workpiece held on the support towards the opening of the baseplate into a processing position. The control system is configured to create a positive pressure gradient between the reaction chamber and the loading chamber while the workpiece support is in motion. Purge gases flow from the reaction chamber into the loading chamber while the workpiece support is in motion. The control system is configured to create a negative pressure gradient between the reaction chamber and the loading chamber while the workpiece is being processed. Purge gases can flow from the loading chamber into the reaction chamber while the workpiece support is in the processing position, unless the reaction chamber is sealed from the loading chamber in the processing position.
Owner:ASM IP HLDG BV
Method and apparatus for providing positive airway pressure to a patient
InactiveUS6609517B1Reduce cardiac preloadEasily detecting exhalationRespiratorsOperating means/releasing devices for valvesMedical disorderPositive pressure
A system including methods and apparatus for treatment of a medical disorder such as obstructive sleep apnea or congestive heart failure. The system involves applying separate and independent gains to flow rates of pressurized gas delivered to a patient during inspiratory and expiratory phases of a respiratory cycle to deliver the pressurized gas in proportion to the respective gains during inspiration and expiration. A base pressure may be applied in addition to the gain-modified pressures and an elevated pressure profile may be employed to assist or control inspiration. The system may be fully automated responsive to feedback provided by a flow sensor that determines the estimated patient flow rate. A leak computer can be included to instantaneously calculate gas leakage from the system. The system may be utilized in connection with conventional continuous positive airway pressure (bi-level PAP) equipment to effect various beneficial treatment applications.
Owner:RIC INVESTMENTS LLC
Method and apparatus for providing positive airway pressure to a patient
InactiveUS6932084B2Easily detecting exhalationDecrease in EPAPRespiratorsOperating means/releasing devices for valvesMedical disorderPositive pressure
A system including methods and apparatus for treatment of a medical disorder such as obstructive sleep apnea or congestive heart failure. The system involves applying a gain to flow rate of pressurized gas delivered to a patient during inspiratory and / or expiratory phases of a respiratory cycle to deliver the pressurized gas in proportion to the respective gains during inspiration and / or expiration. A base pressure may be applied in addition to the gain-modified pressures and an elevated pressure profile may be employed to assist or control inspiration. The system may be fully automated responsive to feedback provided by a flow sensor that determines the estimated patient flow rate. A leak computer can be included to instantaneously calculate gas leakage from the system. The system may be utilized in connection with conventional continuous positive airway pressure treatments, such as CPAP or bi-level positive airway pressure equipment to effect various beneficial treatment applications.
Owner:RIC INVESTMENTS LLC
Apparatuses and methods to treat biological external tissue
InactiveUS20070179482A1Avoid stretchingUltrasound therapySurgical instruments for heatingPositive pressureHand held devices
Devices and methods which generate reduced pressures to treat biological external tissue using at least one energy source are disclosed. The energy source may be incoherent light, coherent light, a radio frequency, ultrasound, a laser, and / or any other type of energy that can be applied through the device. The energy source may be a single or pulsed application of energy. The features of various embodiments of the device include the generation of positive pressure and / or negative pressure through one or more pressure conduits, the application of an object within a recess of the device, and measurements through various sensors on the device. The device may be a handheld device or an add-on to existing devices in some embodiments.
Owner:AESTHERA CORP
Wound healing device
ActiveUS20080275409A1Promote growthPromote woundWound drainsVaccination/ovulation diagnosticsMicron scaleVacuum pressure
Methods and devices transmit micromechanical forces locally on the millimeter to micron scale for promoting wound healing. Micromechanical forces can selectively be applied directly to tissue, in some embodiments, by using microchambers fluidically connected to microchannels. Each chamber, or in some cases, group of chambers, may be associated with a valve to control vacuum pressure, positive pressure, liquid delivery, and / or liquid removal from each chamber or group of chambers. Application of embodiments of the invention may shorten wound-healing time, reduce costs of therapy, enable restoration of functional tissue, and reduce the need for more invasive therapies, including surgery.
Owner:THE BRIGHAM & WOMEN S HOSPITAL INC
Nares seal
InactiveUS20060081250A1Reduce the overall diameterLess thicknessRespiratorsBreathing filtersNostrilStoma
Apparatus for fitting to the head of a patient for supply of gas to the nose at a positive pressure for treatment of snoring and sleep apnea comprises headgear for fitting to the head of a patient. A mask support forms part of said headgear and is held, in use, by portions of said headgear in a stable position above the nose of the patient. The mask support includes a manifold chamber, a first connector opening above said manifold chamber for attachment of a gas supply line and a second connector depending from said manifold chamber. The above apparatus may be used with a novel nasal mask which is a nares seal that may be removably connected to said second connector by a third connector forming part of said seal and having an air orifice formed therethrough. The seal further comprises first and second laterally spaced delivery tubes connecting with said air orifice and defining between them a generally triangular open space which extends, when in use, downwardly to a point below the nose of a patient. The delivery tubes thence curves inwardly and upwardly to approach the nose of a patient and supports first and second nostril tubes connected with said delivery tubes for insertion into the nares of a patient. Wire support for said laterally spaced tubes extends from the connector to about where said tubes curve inwardly and upwardly.
Owner:SOMNETICS INT INC
Aerosol delivery apparatus with positive expiratory pressure capacity
InactiveUS6848443B2Continuous regulationRespiratorsLiquid surface applicatorsPositive pressureAerosol delivery
An apparatus and method for performing positive pressure (PP) therapy alone or in combination with an aerosol delivery apparatus. The positive pressure apparatus includes a positive pressure valve having a continuously variable respiratory window. The PP valve may be associated with a patient respiratory system interface alone, such as, but not limited to, a mask or mouthpiece, or in combination with an aerosol delivery apparatus.
Owner:TRUDELL MEDICAL INT INC
Blower with bearing tube
A blower includes a stationary portion including an inlet and an outlet, a rotating portion provided to the stationary portion, and a motor adapted to drive the rotating portion. The inlet and outlet are co-axially aligned. The stationary portion includes a housing, a stator component provided to the housing, and a tube providing an interior surface. The rotating portion includes one or more bearings that are provided along the interior surface of the tube to support a rotor within the tube. In an embodiment, the blower is structured to supply air at positive pressure.
Owner:RESMED MOTOR TECH
Multiple stage blowers and volutes therefor
ActiveUS20050103339A1Faster pressure rise timeImprove reliabilityPump componentsMedical devicesImpellerMotor speed
A multiple stage variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the multiple stage blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
Owner:RESMED LTD
Patient interface systems
ActiveUS20100307502A1Improve manufacturabilityImprove usabilityRespiratory masksBreathing masksPositive pressureSleep disordered breathing
Owner:RESMED LTD
Double-ended blower and volutes therefor
InactiveUS6910483B2Faster pressure rise timeImprove reliabilityPropellersElement comparisonMotor speedImpeller
A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
Owner:RESMED LTD
User interface and head gear for a continuous positive airway pressure device
InactiveUS20070163600A1Minimize gravitational forceMinimize inertial forceRespiratory masksBreathing masksPositive airway pressureNasal prongs
A user interface for a portable continuous positive airway pressure (CPAP) device comprises a gas delivery member releasably mountable to a manifold member. The CPAP device comprises a motor blower unit contained in a wearable vest which is connectable by a patient hose to the user interface. Alternative embodiments of the gas delivery member include a nasal mask or a pair of nasal prongs which are interchangeably mountable to the manifold member. Ball joints on opposing ends of the patient hose swivelably interconnect the patient hose to the user interface and to the motor blower unit. Cheek pads extend from opposing ends of the manifold member and are freely orientatable relative thereto. Six-way adjustable head gear stabilizes the user interface on the patient's face and comprises side straps and head straps which are pivotably joined to one another and which are adjustable lengthwise to fit a wide range of patient
Owner:CAREFUSION
Apparatus and method to apply substances to tissue
Methods and apparatuses to apply substances to a biological tissue are described. The tissue having an target below a surface is stretched to provide openings in a surface. Stretching forces a material from the target onto the surface. A first substance may be applied while stretching to promote cleaning the tissue. A second substance may be applied to the surface. Energy may be applied to the tissue. Then the tissue is relaxed to draw the second substance through the openings into the tissue. The tissue may be stretched by applying a negative pressure, and relaxed by removing the negative pressure. The first substance may be an abrasive material. The second substance is a medicine, a moisturizer, a lotion, or any combination thereof. The second substance may be applied to the biological tissue using a positive pressure. The apparatus to apply substances may be a handheld device.
Owner:SOLTA MEDICAL
Chemiluminescence-based microfluidic biochip
InactiveUS6949377B2Accurate and reproducible resultSimple and rapid and POCT applicationBioreactor/fermenter combinationsBiological substance pretreatmentsPositive pressureBiochip
The disclosure describes how to use luminescence detection mechanism, move microfluid, and control multiple-step biochemical reactions in closed confined microfluidic biochip platform. More particularly, a self-contained disposable biochip with patterned microchannels and compartments having storage means for storing a plurality of samples, reagents, and luminescent substrates. At least one external microactuator in the biochip system produces positive pressure and automates multiple-step reactions in microfluidic platforms for clinical chemistry, cell biology, immunoassay and nucleic acid analysis. The method comprises the steps of transferring sequentially at least one of samples, reagents, and then luminescent substrate from compartments through microchannels to reaction sites. The luminescent substrates react with probes to form a probe complex resulting into luminescence, which is detected by an optical detector.
Owner:HO WINSTON Z
Manual breast pump
InactiveUS20050154349A1Reducing and eliminating riskImprove comfortMilking pumpMedical devicesPositive pressureManual breast pump
A manually actuated breast pump is provided. The breast pump has a breast cup, pump mechanism and a container. The components of the breast pump are easily assembled and disassembled to facilitate use, cleaning, manufacture and transport. The breast pump can apply a negative pressure, a positive pressure or both to a user's breast. The breast pump provides fluid isolation between the pressure source and the expressed milk.
Owner:PLAYTEX PROD INC
Ventilator with dual gas supply
InactiveUS7077131B2Minimize the differenceOperating means/releasing devices for valvesRespiratory masksRelative pressureValve actuator
A method of pressure regulation and a ventilator are provided. The ventilator includes a positive relative pressure gas supply, a negative relative pressure gas supply, and a diverter valve. The diverter valve includes a positive pressure port connected to the positive relative pressure gas supply, a negative pressure port connected to the negative relative pressure gas supply, and a gas supply port communicating with a gas delivery device. The ventilator preferably further includes a feedback sensor that detects a gas supply difference between a gas supply and a predetermined gas supply and generates a feedback signal that is substantially related to the gas supply difference. The ventilator preferably further includes a diverter valve actuator communicating with the diverter valve and operating the diverter valve to communicate the positive relative pressure gas supply and the negative relative pressure gas supply to the gas supply port of the diverter valve based upon the feedback signal.
Owner:TYCO HEALTHCARE GRP LP
Apparatus and method for skin treatment with compression and decompression
InactiveUS20070255355A1Reduce tensionCavity massageSurgical instrument detailsOptical radiationSkin treatments
The present invention generally provides methods and devices that allow more efficient delivery of a stimulus, such as optical radiation, to the skin. In many embodiments, negative and / or positive pressure is applied to one or more skin regions in order to maintain a skin target under tension so as to redistribute blood volume between the skin target and other skin segments. In many cases, such tension can cause a depletion of the volumetric blood content in the skin target (that is, in the blood vessels beneath a surface of the skin target), thereby facilitating delivery of radiation to the skin target.
Owner:PALOMAR MEDICAL TECH
Apparatus and method for treating biological external tissue
InactiveUS20050251117A1More incident energyMore energyUltrasound therapyElectrotherapyPositive pressureSkin color
A method and device for treating biological external tissue using at least one energy source. The energy source can be incoherent light, coherent light, a radio frequency, ultrasound, a laser, or any other type of energy that can be applied through the device. The features of various embodiments of the device include the generation of positive pressure and / or negative pressure through one or more pressure conduits, the application of an object within a recess of the device, and measurements through various sensors on the device. These sensors can be monitored and / or controlled through a display element having rows and columns of pixels on the device. The device can be a handheld device or an add-on to existing devices in some embodiments, and can include skin color sensors, temperature sensors, and capacitance sensors.
Owner:AESTHERA
Soft-grip medical connector
InactiveUS20060161115A1Positive flow effectMinimizing regressionMedical devicesIntravenous devicesPositive pressureCatheter
A soft grip medical connector comprises a housing with an upstream end, a downstream end and a lumen extending through a central portion thereof. A flexible member comprises a valve portion integrally formed with a sleeve portion. The valve portion is positioned within a section of the housing and is configured to control a flow of fluid through the housing lumen. The sleeve is inverted to envelope at least a portion of the outer surface of the housing. In some embodiments the gripping portion is integrally formed with the valve portion. In some embodiments, the connector is also generally configured to create a positive pressure in a catheter lumen upon removal of a syringe or other medical device from the upstream end of the connector. Methods of making a medical fluid connector generally comprise forming a valve member with a sleeve extending there from, and assembling the valve, sleeve and housing.
Owner:ICU MEDICAL INC
Device and methods for body fluid flow control in extracorporeal fluid treatments
Disclosed are devices and methods for the control of body fluid flow in the extracorporeal treatment of body fluid. Body fluid flow through on of a body fluid flow circuit (10, 50, 60, 100 or 250) is controlled by alternating applying vacuum pressure and positive pressure to the circuit through a pumping chamber (30, 51, 66, 102, or 200) coordinated with flow control valves (40, 42, 44, 62, 114, 116, 118, and 120) to effect a net downstream flow of body fluid through the circuit.
Owner:RENAL SOLUTIONS
Wearable system for positive airway pressure therapy
Owner:AIR PROD & CHEM INC
Patient interface and non-invasive positive pressure ventilating method
ActiveUS20090014007A1Convenient treatmentReduce decreaseRespiratory masksBreathing masksNasal bridgeLine tubing
A patient interface for use in delivering a flow of breathable gas to an airway of a patient includes a first seal adapted to contact the patient's face and seal a first space between the patient interface and the patient's face at a first positive pressure; and a second seal adapted to contact the patient's face and seal a second space between the patient interface and the patient's face at a second positive pressure. The first seal also seals the first space from the second space. A leak reducing element may be provided on a seal to reduce and / or diffuse leakage of gas. A vacuum line configured to create a negative pressure may be provided in the second space to remove any gas leaking from the first space to the second space. A seal may be connected to a conduit for delivering the flow of gas that is incorporated into a frame of the patient interface. The seal may be inflatable by the flow of breathable gas to pressurize the seal against the patient's face and include a vent that directs the flow of breathable gas to a space between the patient interface and the patient's face. A cuff may be provided over the seal in the nasal bridge region to direct any leakage of the gas flow from the seal in the nasal bridge region in a direction away from the patient's eyes.
Owner:RESMED LTD
Double ended blower and volutes therefor
InactiveUS20030168064A1Faster pressure rise timeImprove reliabilityPropellersElement comparisonMotor speedImpeller
A double-ended variable speed blower for Continuous Positive Airway Pressure (CPAP) ventilation of patients includes two impellers in the gas flow path that cooperatively pressurize gas to desired pressure and flow characteristics. Thus, the double-ended blower can provide faster pressure response and desired flow characteristics over a narrower range of motor speeds, resulting in greater reliability and less acoustic noise.
Owner:RESMED LTD
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