4362 results about "Reflux" patented technology

A pair of nestable caps are disclosed, each of the caps being sized and shaped to provide a protective union about a separated medical connector. The pair comprises a male cap and a female cap, each of which is configured to be adjoined to a complimentary cap to form a nested pair. The nested pair is sealed until separated for use, thereby maintaining sterility of the internal surfaces of the nested pair. One of the caps may have a fluid chamber joined thereto filled with medicine or antiseptic. The cap can have a channel extending therethrough to provide fluid communication between the fluid chamber and a fluid pathway. The fluid chamber can be adapted to diffuse the fluid into the fluid pathway over time, or the fluid chamber can be adapted to dispense the fluid out of the fluid chamber without reflux.

An artificial heart valve and weaving method thereof are disclosed. The valve stent includes a tubular stent (10), valve leaflets (33), sealing membranes (351, 354), x-ray opaque markers (311, 312) and flexible connecting loops (41). The middle segment (15) of the net stent (10) is tubular or drum-shaped, or provided with radial protrusion structures (153), or provided with outer annular structures (155), or provided with outer free tongues (156), or provided with radial protrusion structures (153) and outer free tongues (156). The stent can be made by up and down interweaving the same one elastic metal wire, and also can be made by up and down interweaving different elastic metal wires. Moreover, the structure, shape and function of the valve stent are optimized; in radical compression, the valve can be transported to the right place with the help of interventional device; after expansion, fitted with figure of the vascular wall in the radical and axial direction, the artificial heart valve stent will not produce paravalvular leak; even more after implanting, the valve has a normal effect on prevent the slippage of artificial valve, which is caused by the blood reflux through the closed valve.

The present invention relates to methods for separating and recovering ethane, propane and heavier components from a feed gas, e.g. raw natural gas or a refinery or petroleum plant gas stream or a petrochemical plant gas stream. These methods employ a common new concept which is the use of the turbo-expander shaft compressor to generate the reflux requirement for the cryogenic absorber or distillation columns. The power of the turbo-expander which is absorbed by the shaft compressor is always high enough so that reflux generation by a specific gas compression through the expander shaft compressor and subsequent cooling, condensation and sub-cooling can always be easily maintained. The present invention allows for higher cryogenic absorber pressure and a lower demethanizer/de-ethanizer column pressure thus eliminating the common cryogenic pump at absorber bottom. The present invention ultimately results in a lower residue compression and utilities consumption. The present invention as such allows for a higher 99+% recovery of NGL from the feed gas stream.

Devices, systems, and methods for treatment of an eye alter aspiration flow from the eye in response to an occlusion of the aspiration conduit pathway. Where aspiration is drawn from the eye using a volumetric pump, the pump can be reversed so as to induce fluid reflux from the aspiration conduit pathway into the eye to help clear the occlusion. The pump may vary the reverse flow in response to sensed aspiration pressure or the like, and the reverse flow may be halted before the pressure within the aspiration conduit pathway adjacent the eye significantly exceeds the irrigation fluid pressure and/or the pressure within the eye. Reflux may alternatively be generated by modulating a vent valve disposed between an irrigation conduit pathway and the aspiration conduit pathway.

Pharyngoesophageal monitoring systems are provided that monitor the environment of the pharynx and esophagus, and in some embodiments, detect and monitor refluxate, and may further record other physical episode data. The system may be provided, in some embodiments, as a bifurcated, adjustable, multiple internal reference probe, and methods thereof, to detect acid reflux and to monitor pH levels of acid reflux episodes simultaneously at multiple locations within the pharyngoesophageal passage. Some embodiments provide a recorder and one or a plurality of sensor arrangements, the recorder being responsive to the sensors and capable of correlation of signals generated by the sensor arrangements.

Apparatus and methods are provided for forming a gastrointestinal tissue fold by engaging tissue at a first tissue contact point and moving the first tissue contact point from a position initially distal to, or in line with, a second tissue contact point to a position proximal of the second contact point, thereby forming the tissue fold, and extending an anchor assembly through the tissue fold from a vicinity of the second tissue contact point. Adjustable anchor assemblies; as well as anchor delivery systems, shape-lockable guides and methods for endoluminally performing medical procedures, such as gastric reduction, treatment of gastroesophageal reflux disease, resection of lesions, and treatment of bleeding sites; are also provided.

A device for collecting oral liquids includes a lateral flow chromatography strip having a collection pad for insertion into the mouth. The collection pad is separated from the remainder of the chromatography strip by a liquid impermeable removable barrier which prevents liquid in the collection pad from entering the chromatography strip. Once adequate oral liquid has been collected (as indicated by a sample sufficiency indicator), the device is withdrawn from the mouth and the barrier is removed to allow oral liquids to flow through the strip. The liquids interact with binding partners in the strip to provide test results, such as an indication that an analyte of interest is present in the liquid. The strip may be contained in a housing with an access opening through which the removable barrier may be manipulated, and windows through which test results may be viewed. This device avoids reflux of reagents from the strip into the mouth of a test subject during use.

A method for forestalling or therapy, at least partially, of BPH or prostate cancer comprising identifying a reflux of venous blood to the prostate and impeding the reflux by treating veins effecting or conveying the reflux, and related apparatus and kit.

Certain embodiments provide a method for treating a subsurface formation. The method includes using heaters to form a heated portion of the subsurface formation. A production conduit is used to direct formation fluid in a vapor phase from the heated portion of the subsurface formation towards a surface of the subsurface formation. Condensate of the vapor phase formation fluid is formed in or near the production conduit. Condensate of the vapor phase formation fluid is diverted to a desired location.

A step-design cannula and delivery system for chronic delivery of therapeutic substances into the brain using convention-enhanced delivery of therapeutic substances and which effectively prevents reflux in vivo and maximizes distribution in the brain.

Endoscopic devices and methods used for fastening multiple tissue layers, such as, for example, an endoscopic fundoplication procedure, are disclosed. The endoluminal device includes a tissue fastener, a flexible needle having means for grasping and releasing a portion of the tissue fastener, and a deflector for deflecting and guiding the needle toward the multiple tissue layers.

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to an intermediate pressure, and then supplied to a distillation column at a first mid-column feed position. The second stream is also expanded to intermediate pressure and is then supplied to the column at a second lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the second stream and is cooled to condense at least a part of it, forming a reflux stream. At least a portion of the reflux stream is directed to the distillation column as its top feed. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

A system and process is disclosed for retorting oil shale and extracting shale oil and other hydrocarbons therefrom, in which a cased heat delivery well is drilled generally vertically through an overburden and then through a body of oil shale to be retorted to the bottom thereof, generally horizontally under the body of oil shale to be retorted, and then back to the earth surface. Heat energy is transmitted conductively to the body of oil shale to be retorted from a closed loop heat delivery module in the well, the module comprising a fluid transmission pipe containing a heating fluid heated to at least a retorting temperature. Heat energy is also transmitted to the body of oil shale to be retorted above the fluid transmission pipe by vapor conduits that conduct retort vapors upward through the body of oil shale to be retorted; the ascending retort vapors condense and reflux, delivering their latent heat of vaporization to the body of oil shale to be retorted, and the condensed retort liquids descend. If not recycled, the retort liquids are collected in a sump at the bottom of a production well and are transmitted to the surface for processing. The vapor conduits communicate at upper ends thereof with the production well, so that vapors that do not reflux are collected in the production well and are transmitted to the surface for processing.

A first tube (3) and second tube (7) for guiding aqueous humor to the exterior of the eye are connected to each other in the vicinity of a surface of conjunctiva (14) via a first joint (5) and second joint (6). A filter part (9) provided to prevent reflux infection from the exterior to interior of the eye is connected to the second tube (7) via a third tube (8) positioned inside a lower lacrimal canaliculus (23). This enables an aqueous humor drainage implant (1) to be positioned in the eye and the exterior of the conjunctiva with reduced invasiveness. With the aqueous humor drainage implant for glaucoma treatment, the aqueous humor in the eye can be drained to the exterior of the conjunctiva while preventing reflux infection at the viral level, and the intraocular pressure reducing effect can be sustained for extended time periods over the lifespan of the patient. Further, the aqueous humor drainage implant can be readily positioned with reduced surgical invasiveness, while posing no danger of damaging the eye or nasolacrimal duct after the installation.

A tissue retractor includes a body having proximal and distal ends. The retractor also includes a retraction device having a head connected to the distal end of the body and defining two opposing openings, an actuator movably disposed in the head, and two substantially rigid needles each pivotably connected to the actuator for traveling through a respective one of the openings. The needles have an arcuate shape. A one-handed actuation device is connected to the proximal end of the body and is operatively connected to the actuator through the body. Upon actuation of the actuation device, the actuator moves to selectively extend the needles out of the head and withdraw the needles into the head. Methods for using the tissue retractor, in particular for the treatment of Gastroesophageal Reflux Disease, are also provided.

A method for treatment or prophylaxis of a disease state or other physiological condition, e.g., autism, delayed development, acid reflux disease, vaginal yeast infections, impaired hearing, chronic ear infections, seasonal allergies, Fibromyalgia syndrome, Crohn's disease, colitis, irritable bowel syndrome, interstitial cystitis, acne, sinusitis, rheumatoid arthritis, chronic fatigue syndrome, asthma, attention deficit disorder, attention deficit/hyperactivity disorder, rosacea, multiple sclerosis, hyperglycemia, or Ménière's disease, by administration of an anti-fungal composition that includes at least one of the bacilli (1) Bacillus subtilis, (2) Lactobacillus sporogenes, and (3) Streptococcus faecalis.

The invention relates to a support of an olefinic polymerization catalyst and a preparation method thereof, solid catalyst components for olefinic polymerization and an olefinic polymerization catalyst. The support of the olefinic polymerization catalyst is dialkoxy magnesium. The preparation method of the support of the olefinic polymerization catalyst comprises the following steps: in an inert gas protective atmosphere, reacting magnesium and alcohol, which serve as raw materials, in the presence of a halogenating agent under reflux to prepare the dialkoxy magnesium, wherein the weight ratio of alcohol to magnesium is (4-50):1; the halogenating agent is at least one of halogen simple substances and halides, and the mol ratio of halogen atom to magnesium is (0.0002-0.2):1; and the dialkoxy magnesium is spherical particles of which the average particle size is 10-150 um and the particle size distribution index SPAN is smaller than 1.1. The olefinic polymerization catalyst prepared by the support has high activity, and the polymer has the advantages of high bulk density, good particle shape and uniform distribution; and thus, the olefinic polymerization catalyst is suitable for producing propylene homopolymer and copolymer.

Process for the liquefaction of natural gas and the recovery of components heavier than methane wherein natural gas is cooled and separated in a first distillation column into an overhead vapor enriched in methane and a bottoms stream enriched in components heavier than methane, wherein the first distillation column utilizes a liquefied methane-containing reflux stream. This reflux stream may be provided by a condensed portion of the overhead vapor or a portion of totally condensed overhead vapor that is subsequently warmed. The bottoms stream may be separated in one or more additional distillation columns to provide one or more product streams, any of which are partially or totally withdrawn as recovered hydrocarbons. A stream of unrecovered liquid hydrocarbons may be combined with either the condensed portion of the overhead vapor or a portion of totally condensed overhead vapor that is subsequently warmed.

A tissue retractor includes a body having proximal and distal ends. The retractor also includes a retraction device having a head connected to the distal end of the body and defining two opposing openings, a connector movably disposed in the body, and two flexible needles of a shape memory material having a memory shape. The needles are fixedly connected to the connector for traveling through a respective one of the openings. The memory shape of the needles includes a portion with an arcuate shape. A one-handed actuation device is connected to the proximal end of the body and is operatively connected to the connector through the body. Upon actuation of the actuation device, the connector can be moved to selectively extend the needles out of the head and withdraw the needles into the head. Methods for using the tissue retractor, in particular for the treatment of Gastroesophageal Reflux Disease, are also provided.

A two-column NGL recovery plant includes an absorber (110) and a distillation column (140) in which the absorber (110) receives two cooled reflux streams, wherein one reflux stream (107) comprises a vapor portion of the NGL and wherein the other reflux stream (146) comprises a lean reflux provided by the overhead (144) of the distillation column (140). Contemplat configurations are especially advantageous in a upgrade of an existing NGL plant and typically exhibit C₃ recovery of at least 99% and C2 recovery of at least 90%.

A minimally invasive surgical procedure is disclosed which includes the steps forming a fold of tissue, extending one or more needles through the fold of tissue, deploying a tissue fastener from an interior lumen of each of the needles, and retracting each of the needles from the fold of tissue such that the tissue fasteners remain deployed in the fold of tissue.

An wireless ambulatory reflux monitoring system capable of monitoring and recording esophageal biological parameters during an ambulatory period. The wireless ambulatory reflux monitoring system is further capable of recording perceived reflux events at the discretion of a patient contemporaneously with the recording of biological data.

A method of making a flush syringe assembly comprises providing a plurality of syringe barrels having a chamber with a conically-shaped distal wall and providing a plurality of stoppers having a conically-shaped distal surface. The method further includes selecting a stopper from the plurality of stoppers and a barrel from the plurality of barrels so that the total included angle of the distal wall of the selected barrel is greater than the total included angle of the selected stopper distal surface, and inserting the selected stopper into the chamber of the selected barrel.

A microsurgical system capable improving reflux via programmable, pre-defined reflux profiles and a pressure accumulator.

The invention provides a preparation method of a silicon/carbon multi-component composite negative electrode material. The preparation method comprises the following steps: (1) preparing a carboxyl carbon nano-tube by using acid and a carbon nano-tube, or preparing an aminated carbon nano-tube by using the carboxyl carbon nano-tube; (2) oxidizing the surface of nanometer silicon so as to generate a layer of silicon oxide, or aminating slightly oxidized nanometer silicon by using ammonia-containing organosilane under the condition of heating reflux; (3) adding the carboxyl carbon nano-tube and the aminated nanometer silicon, or the carboxyl carbon nano-tube and the slightly oxidized nanometer silicon to an organic carbon source-containing solvent, dispersing and carrying out spray drying-pyrolysis; (4) mixing a material obtained in the step (3) with asphalt, and sequentially carrying out low-temperature, constant temperature and high-temperature heat treatments, thus obtaining a secondary silicon-carbon nano-tube/amorphous carbon composite negative electrode material; and (5) carrying out airflow crushing, grading, adding to the organic carbon source-containing solvent, carrying out spray drying-pyrolysis or spray pyrolysis, and carrying out high-temperature treatment, thus obtaining the silicon/carbon multi-component composite negative electrode material. The silicon/carbon multi-component composite negative electrode material prepared by the method has the advantages of large reversible capacity, designable capacity, good cycle performance, high tap density and the like.

Methods and systems for monitoring, preventing and/or treating upper airway disorders such as apnea, dysphagia, reflux and/or snoring are described. The methods and systems monitor the upper airway disorders by processing one or more neural signals obtained from one or more upper airway afferents. Upper airway disorders are prevented and/or treated by delivering one or more stimulations to one or more reflex-related afferents, efferents, muscles, and sensory receptors to manipulate the threshold and/or trigger an upper airway reflex including, but not limited to a swallow reflex and/or a negative-pressure reflex.

A system and method for removal of a contaminant comprising removing a liquefied portion of a refrigerant stream comprising nitrogen from a reverse Brayton cycle refrigerant system, introducing the liquefied refrigerant stream into a contaminant removal column as a reflux stream removing a contaminant stream from the bottom of the contaminant removal column, removing a vapor stream enriched in nitrogen from the top of the contaminant removal column, and introducing the vapor stream enriched in nitrogen back into the reverse Brayton cycle refrigerant system.

An I.V. flush syringe assembly includes a barrel having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end with a passageway therethrough in fluid communication with the chamber. An elongate plunger having a proximal end, a distal end and a stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for drawing fluid into and out of the chamber by movement of the stopper relative to the barrel. The plunger includes anti-reflux structure for minimizing stopper deflection when fluid has been delivered from the chamber and the stopper is being forced against the distal end of the chamber.

A processing method and system for separating methane-rich and ethane-rich components from an LNG stream. The LNG stream is preheated against a distillation column overhead vapor stream and against an overhead vapor product prior to entering the column. The overhead vapor product is methane-rich. The LNG stream may further be preheated against the column bottoms and another heating medium. The method may also include compressing the methane-rich product, condensing it against the LNG stream, and pumping it. The system may also comprise third and fourth heat exchangers configured to preheat the LNG stream with the bottoms product and the heating medium. Further, the system may provide for compressing the overhead vapor product prior to the its exchanging heat with the LNG stream and a pump for pumping condensed overhead vapor product. Additionally, the system generates all of the required reflux by cross exchanging the column overhead with the incoming LNG stream.

A process for the recovery of natural gas liquids (NGL) (ethane, ethylene, propane, propylene and heavier hydrocarbons) from liquefied natural gas (LNG) is disclosed. The LNG feed stream is split with at least one portion used as an external reflux, without prior treatment, to improve the separation and recovery of the natural gas liquids (NGL).