1580results about How to "Reduce circulation" patented technology

Organs and other tissue structures are isolated and perfused with a therapeutic agent. Isolation is effected by endovascularly positioning catheters having occlusion balloons within the arteries or other blood vessels which supply blood to the organ. Similarly, blood flow from the organ back to the patient's circulatory system is blocked by endovascularly positioning one or more catheters carrying occlusion members within the veins or other blood vessels leading from the organ. The therapeutic agent may then be perfused through the organ in either an antegrade or retrograde fashion using the endovascularly positioned catheters while maintaining isolation.

A medical flow restrictor that may be used to exclude a saccular aneurysm from the circulatory system. The device, a thin walled, foil-like shell, is compacted for delivery. The invention includes the device, electroforming fabrication methods, delivery assemblies, and methods of placing, and using, the device. A device with an aneurysm lobe and an artery lobe self-aligns its waist at the neck of an aneurysm as the device shell is pressure expanded. Negative pressure is used to collapse both the aneurysm lobe and the artery lobe, captivating the neck of the aneurysm and securing the device. The device works for aneurysms at bifurcations and aneurysms near side-branch arteries. The device, unlike endovascular coiling, excludes the weak neck of the aneurysm from circulation, while leaving the aneurysm relatively empty. Unlike stent-based exclusion, the device does not block perforator arteries. This exclusion device can also limit flow through body lumens or orifices.

The present invention is directed to an intravascular treatment for intracranial aneurysms. The invention consists of a patch stent and, also, a patch stent delivery system allowing one to rotate the stent to align the patch with the neck of the aneurysm. A self-expanding nitinol framework holds the patch in place, a radiopaque agent allows the patch location to be visualized and a pusher tube that is mechanically locked into the unexpanded stent is used to push the stent out of the catheter with rotational and longitudinal control necessary to align the patch with the aneurysm. A self-expanding framework is used to support a patch at the neck of the aneurysm. The patch is designed to reduce the blood circulation in the aneurysm and the stagnant blood will clot or thrombus. The thrombus will stop any current blood leakage into the brain and will dramatically reduce the possibility of future leaks or potentially deadly ruptures. Over time the thrombus will be absorbed and the volume of the aneurysm will shrink reducing pressure on surrounding tissue.

A method for extracting silicon dioxide, alumina and gallium oxide from high-alumina fly ash relates to the technology fields of environmental mineralogy and material, chemical industry and metallurgy. The method comprises the main steps as follows: causing the high-alumina fly ash to react with sodium hydroxide solution; filtering the solution; introducing CO2 to the filtrate for full gelation; cleaning, purifying, drying, grinding and calcining the silica gel after gel filtration to obtain finished white carbon black; adding limestone and a sodium carbonate solution into the filter mass after the reaction and filtration of the high-alumina fly ash and the sodium hydroxide solution; ball grinding the mixture into raw slurry; dissolving out the clinker obtained by baking the raw slurry; subjecting the filtrate to deep desiliconization to obtain sodium aluminate extraction liquid; filtrating the sodium aluminate extraction liquid after subjecting the sodium aluminate extraction liquid to carbon dioxide decomposition; baking the aluminum hydroxide after washing the filter mass to form the aluminum hydroxide product; and extracting the gallium oxide from the carbon dioxide decomposition mother solution and desiliconized solution. The method has the advantages of low material price, simple operating procedures, low investment, low production cost, low energy consumption and less slag.

Drilling fluid additive compositions are provided for use with synthetic, oil based, or water based drilling fluids. The combined additive and drilling fluid are effective for reducing lost circulation, seepage loss as well as wellbore strengthening and / or wellbore lining. The method includes injecting the drilling fluid and 0.01 or more pounds per barrel of a loss control additive including ground and sized pumice, barite or dolomite.

The invention discloses a new fluidized bed hydrogenation reactor. The fluidized bed hydrogenation reactor of the invention comprises a cylinder-shaped reactor shell perpendicular to the ground, a three-phase separator arranged at the upper part in the reactor shell and a guiding structure arranged at the middle upper part of the reactor. The guiding structure is an annular convex structure arranged on the inner wall of the reactor and has the lengthwise section of a trapezoid or an arc along the axle of the reactor. The combination of the guiding structure and the three-phase separator increases the operating flexibility of the three-phase separator, and ensures the high-efficiency separation on the three-phase separator, thereby greatly reducing the carrying amount of catalyst. The fluidized bed hydrogenation reactor of the invention can be applied to the chemical reactions between different liquids or gases and solid grains under the condition of contacting, and is characterized by large catalyst inventory, high reactor utility ratio, etc.

Drilling fluid additive compositions are provided for use with synthetic, oil based, or water based drilling fluids. The combined additive and drilling fluid are effective for reducing lost circulation, seepage loss as well as wellbore strengthening and / or wellbore lining. The method includes injecting the drilling fluid and 0.01 or more pounds per barrel of a loss control additive including ground and sized pumice, barite, anthracite or dolomite.

A modification to allow delivery of a two port medical flow restrictor over a guidewire, and a means to mechanically collapse the new device. A thin walled, foil-like shell, is compacted for delivery. The invention includes the device, delivery assemblies, and methods of placing, and using, the device. A device with an aneurysm lobe and an artery lobe self-aligns its waist at the neck of an aneurysm as the device shell is pressure expanded. Mechanical force collapses both the aneurysm lobe and the artery lobe, captivating the neck of the aneurysm and securing the device. The device works for aneurysms at bifurcations and aneurysms near side-branch arteries. The device, unlike endovascular coiling, excludes the weak neck of the aneurysm from circulation, while leaving the aneurysm relatively empty. Unlike stent-based exclusion, the device does not block perforator arteries. This exclusion device can also limit flow through body lumens or orifices.

In a non-aqueous electrolyte secondary battery provided with a positive electrode 1, a negative electrode 2, and a non-aqueous electrolyte solution, a lithium-containing composite nickel oxide is used as a chief component of the positive electrode material for the positive electrode, a lithium-containing titanium oxide is used as a chief component of the negative electrode material for the negative electrode, and the solvent of the non-aqueous electrolyte solution contains a cyclic carbonic ester and a chain carbonic ester in such a manner that the cyclic carbonic ester and chain carbonic ester are contained in amounts of not less than 10% by volume of the whole solvent, respectively, and the total content of the cyclic carbonic ester and the chain carbonic ester is not less than 60% by volume of the whole solvent.

Topical use of teprenone in a cosmetic or dermopharmaceutical composition as an active preventing and / or limiting the skin cells sénescence and / or protecting the general state of the skin.

A method for reducing corrosion of a wash water system for glass forming lines, by using a corrosion meter, is provided. Also provided is a fiberglass manufacturing process that utilizes the method.

A method for recovering MnO2 from the anode material of a wasted lithium manganate oxide battery comprises the following steps of firstly obtaining an anode active material by pre-disposing assembled anode sheets with alkaline solution, etc., subsequently taking the anode active material as a raw material and obtaining a Lambda-MnO2 by soaking the raw material in an inorganic acid or a normal-pressure acid, or obtaining an Alpha- / Beta- / Gama-MnO2 by soaking the raw material in a hydrothermal acid. The method has simple process, little used acid and convenient separation and purification; the obtained various crystal-type MnO2 with large specific surface area and porous structure can be applied directly to be as a catalyst for synthesizing ester compound or disposable battery anode material of Li / MnO2 or electrode material of a super-capacitor.

A method is provided for reducing lost circulation when aqueous, oil, or synthetic based drilling fluid is used. The method includes injecting two fluids into the well bore and lost circulation zone. The first fluid is an aqueous liquid containing at least one polymer capable of absorbing water in an alkaline environment. The aqueous liquid has a pH that inhibits at least one polymer from absorbing water. The second fluid contains a hardening composition in a base fluid having a pH sufficient to increase the pH in situ to allow at least one polymer to absorb water and expand with the absorbed water and substantially increase in size to close off the lost circulation zone and allow the hardening composition to create a plug in the well bore and set up.

A fiber optic strain relief device is provided. The device has a base that attaches to a piece of equipment and / or hardware. A length of strap positions in the base and forms a loop. The loop is adapted to at least partially encircle a portion of a cable positioned at the base. A strap tightener incrementally shortens the length of the strap, reducing the loop and tightening the strap around the cable. The strap tightener may be a ratchet assembly comprising an actuator, a ratchet cap, a pin, a ratchet lock and a release. The length of strap inserts into a slot in the pin. The ratchet assembly operates to tighten the length of strap encircling the portion of the cable by incrementally rotating the pin. The release allows the strap to be loosened around the fiber optic cable.

A preparation method for a Li-ion battery positive electrode material with layered-spinel symbiotic structure comprises the following steps: (a) synthesizing Mn(OH)2 particle, which is the precursor of Li2MnO4 with spinel structure by chemical coprecipitation method; (b) synthesizing (Ni1 / 3Co1 / 3Mn1 / 3)(OH)2 particle by chemical coprecipitation method using the Mn(OH)2 particle as nucleater, wherein the Mn(OH)2 particle synthesized in step (a) is gradually wrapped by the (Ni1 / 3Co1 / 3Mn1 / 3)(OH)2 particle; (c) washing the precipitate to remove alkali metal ions and acid radical ions in the precipitate and drying; and (d) uniformly mixing the mixed NiCoMn hydrate particle with a Li compound, calcining, and cooling to obtain the final product. The method can greatly improve the Mn content in the positive electrode material with NiCoMn ternary system, and keep higher capacity and cycle performance of the positive electrode material, thereby effectively lowering the cost.

The invention relates to raw material grinding in the field of cement process industries, and aims to provide an advanced control method and system for a vertical mill based on model identification and predictive control. The method comprises the following steps of: acquiring real-time data from a distributed control system (DCS) monitoring system; analyzing a variation trend of the operation and technology parameters, and then invoking a pathological working condition expert database for performing trend matching; if a pathological working condition appears, issuing early warning display and giving qualitative adjustment suggestion remind; giving an optimal target set value according to the basic operation condition of the vertical mill and the variation situation of the product quality requirement, and writing into a predictive controller; setting an optimal controlled quantity output according to the optimal target set value, and outputting to the DCS monitoring system to control a field actuator to take action. By adopting the invention, the qualitative adjustment suggestion can be precisely given; a mathematical model of the grinding process of the vertical mill is established and updated in real time; the steady-state error of the control system is reduced; and the grinding process of the vertical mill is instructed, so that the mill can operate stably for long term at a maximum efficiency point, and stable margin is maintained.

A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injecting the water-based composition, injecting a spacer, and resuming drilling with the oil-based mud.

The invention discloses an Internet of Things transaction system achieving automatic vending. The system is composed of a vending machine with built-in various commodities and a built-in background service terminal, wherein commodity data information sent by a user is induced, received and sent to the background service terminal by the vending machine, and a returned command from the background service terminal is received by the vending machine to control the opening and closing of a door lock of the vending machine; the background service terminal is used for receiving the commodity data information sent by the vending machine, and conducting comparative analysis of the commodity data information sent by the vending machine and the preset commodity data information, and if the match is right, an opening command is sent to the vending machine; if the match is wrong, an opening-refusing command is sent to the vending machine. Compared with the prior art, by means of the Internet of Things transaction system achieving automatic vending, commodity circulation links are reduced, cold fresh products in dense communities are more applicable, intelligence and automation of the commodity vending are achieved, and the 24-hour uninterrupted vending mode is achieved, consumers can select and buy commodities at any time, the richer and more active consumption experience is provided for the consumers.

A method and drilling fluid additive composition are provided for reducing lost circulation and seepage loss when synthetic or oil based drilling fluid is used. The method includes injecting drilling fluid and 1 to 50 pounds per barrel of a loss control additive having a composition comprising 20 to 80 parts by weight fibrous particles, 10 to 40 parts by weight lignite, and 10 to 40 parts by weight phenol-formaldehyde resin.

Methods and devices for improved targeting to a site in an organism, particularly to a tumor target site and for extracorporeal affinity adsorption, particularly in the treatment of cancer, atherosclerosis, including coronary artery disease, unstable angina, other acute ischemic syndromes and idiopathic dilated cardiac myopathy. In one aspect of the invention, a combination is provided comprising an extracorporeal device (1) having contained therein a binding compound (11) bound to a carrier (9), the binding compound having affinity for a binding partner, and a plurality of affinity binders (15), each of said affinity binders comprising a first portion (19) comprising the binding partner and a second portion (17) adapted to bind selectively with a species, the second portions of each of said affinity binders differing from each other.

The invention discloses a device and method to prepare aniline by the nitrobenzene gas phase hydrogenization, and the device mainly includes a fluidized bed reactor set at the raw material gas inlet at the bottom of the reactor, a first gas distributor on the top of the gas inlet, a second gas distributor separating the reactor in the middle of axial height of the reactor into two catalyst dense phase regions, and heat exchangers in two catalyst dense phase regions; catalyst overflow device connected with two catalyst dense phase regions and gas-solid separator. It also discloses a method to prepare aniline by the device, mainly including: the steps of controlling the mol ratio of hydrogen gas to nitrobenzene, controlling the temperature in two catalyst dense phase regions, etc. It has advantages of large reactor operation flexibility, high nitrobenzene conversion, high aniline production selectivity, high product purity, etc.

A battery pack parallel charging device comprises n groups of charging branches, a power module and a battery manager. The charging branches are connected parallelly, each charging branch consists of a battery pack and a switch which are serially connected, and n is the number of the branches of the charging branches; the power module is respectively connected with the switches of the charging branches; and the battery manager is respectively connected with the battery packs and the switches of the charging branches, is used for acquiring voltage of the battery packs in the charging branches, and controls the switches in the corresponding charging branches to be sequentially switched on according to the voltage of the battery packs in the charging branches from low to high. The shortcoming that high ring current is generated among existing battery packs when the existing battery packs are parallelly charged, harmful effects on the existing battery packs and devices in branches are generated, and the existing battery packs and the devices can even be damaged is overcome. By the aid of the battery pack parallel charging device, ring current among the battery packs is greatly reduced, and accordingly safety charging of the battery packs is guaranteed.

A method for treating an inflammation in skin of a patient includes irradiating the skin with infrared (IR) radiation in a first wavelength band and with violet / blue light in a second wavelength band.

The invention discloses a modified high nickel ternary positive electrode material. The surface of a high nickel ternary positive electrode material is coated with a coating layer containing a fast ion conductor. The fast ion conductor has the chemical general formula of Li3x1La2 / 3-x1Ma1TiNz1O3, Li2+2x2Zn1-x2GeO4 or LiM'2(PO4)3, wherein M represents Ba<2+> and / or Sr<2+>, N represents Al<3+> and / orZr<4+>, x1 is greater than or equal to 0.04 and less than or equal to 0.167, a1 is greater than or equal to 0 and less than or equal to 1, z1 is greater than or equal to 0 and less than or equal to 1, x2 is greater than -0.3 and less than 0.8, and M' represents one or more of Zr, Ti, Ge and Hf. Compared with the existing positive electrode material, the modified high nickel ternary positive electrode material is provided with the coating layer containing the fast ion conductor and the coating layer can react with residual lithium on the surface of the material to reduce residual lithium on the surface of the material and inhibit side reactions of the residual lithium and the electrolyte so that material surface stability and cycle performances are improved. The modified high nickel ternary positive electrode material has good lithium ion deintercalation ability, improves the first discharge capacity of the material and first coulombic efficiency and has a good application prospect. The invention also discloses a preparation method of the modified high nickel ternary positive electrode material and a lithium ion battery.