1531 results about "Injections methods" patented technology

A method of locating a vessel lumen to enable placement of a vascular hole closure device comprising the steps of providing a syringe containing a fluid therein, connecting the syringe to an elongated instrument, exerting a force on the syringe plunger as it is inserted through the tissue towards the vessel wall, and detecting movement of the syringe to eject the fluid to determine entry of the elongated instrument into the vessel lumen.

The invention discloses a method for improving the estimation accuracy of the rotor position of a permanent magnet synchronous motor. The method comprises the following steps: on the basis of realizing estimation of the rotor position of the permanent magnet synchronous motor by utilizing a pulse-shake high frequency voltage injection method, processing the extracted position estimation error function, eliminating a second harmonic component introduced due to asymmetric motor parameters, so as to obtain a processed position estimation error function, then establishing a phase-locked loop, and adjusting the phase-locked loop to be 0, thus obtaining estimated rotor speed and estimated rotor position. The method disclosed by the invention can effectively inhibit position estimation second harmonic error caused by the asymmetric motor parameters, and the performance of a control system without a position sensor can be improved.

A medicament injection kit, for use in occluding a renal artery and a renal vein in a kidney and injecting a therapeutic medicament into the kidney so as to pressurize the kidney, includes: an artery catheter which includes a first balloon capable of occluding the renal artery; a vein catheter which includes a second balloon capable of occluding the renal vein; a syringe for injecting the therapeutic medicament, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter; and a syringe for pressurizing the inside of the kidney by injecting a liquid, the syringe being capable of being connected to at least one of the artery catheter and the vein catheter.

An optical module for an optical device and an optical fiber is constituted by a pre-molded plastic package. In forming the plastic package, the main flowing direction of the molding resin is substantially parallel with the optical axis of the optical fiber. The optical module is formed by molding the resin by an injection method using pressure and then solidifying the resin. When the plastic package is formed by comprehensive molding, the flowing direction of the resin is parallel with the optical axis direction of the optical fiber to be installed in the optical module. As a result, for comprehensive molding, the molding pressure applied to the optical fiber is reduced. By using the resin case that is formed, the resulting package exhibits high rigidity and low thermal expansion properties in connection with the flowing direction of the resin, thus reducing the external stress and thermal stress applied to the optical fiber.

Method for preparing, packaging and handling an individual dose of a radiopharmaceutical compound, comprising the following steps: filling a cartridge (1) with said dose of radiopharmaceutical compound via a first end, the second end being closed by means of a component serving as a piston (3); closing said cartridge (1) at said first end by means of a closure device (2); placing said cartridge (1) in a radiation shielding device (10), comprising an inner part (4) and an outer part (5), said inner part serving as radiation shielding for an operator and said outer part serving as a transportation shielding container; closing said container by means of an appropriate shielding lid (6); transporting said container up to the place at which an injection of said radiopharmaceutical compound will take place; removing the shielding lid (6) of the container; fixing a plunger (7) to the cartridge piston (3); extracting the cartridge and the inner part (4) of the radiation shielding device (10) from the outer part (5) serving as a container, and placing injection means (30) on the cartridge end which has the setting closure device (2).

ClotFoam is a surgical sealant and hemostatic agent designed to be used in cases of non-compressible hemorrhage. It can be applied in the operating room through laparoscopic ports, or directly over lacerated tissue in laparotomy procedures or outside the operating room through a mixing needle and/or a spray injection method following abdominal, chest, extremities or other intracavitary severe trauma to promote hemostasis. Its crosslinking technology generates an adhesive three-dimensional polymeric network or scaffold that carries a fibrin sealant required for hemostasis. When mixed, Clotfoam produces a foam that spreads throughout a body cavity reaching the lacerated tissue to seal tissue and promote the coagulation cascade.

The viscoelastic attachment properties of the foam as well as the rapid formation of a fibrin clot that ensure that the sealant remains at the site of application without being washed away by blood or displaced by movement of the target tissue .

An injection method using a length-adjustable needle is disclosed, which comprises an adjusting step in which an exposed needle length of a length-adjustable needle of an injector corresponding to a skin tissue of a patient is adjusted; an insertion step in which an injector is positioned on a skin tissue in a vertical direction with respect to the skin tissue, and a needle is inserted; a suction step in which it is checked whether the needle is inserted into a blood vessel; and an injection step in which an injection liquid is injected from the injector inserted into the skin tissue by the depth corresponding to the exposed length of the needle.

A carbonaceous electrode having improved capacities for doping and dedoping of a cell active substance, such as lithium, and suitable for a non-aqueous solvent-type secondary battery, is constituted by a carbonaceous material having a pore volume of at least 0.55 ml/g of pores having a pore diameter of at most 5 mum as measured by mercury injection method, a potassium content of at most 0.5 wt. % as measured by fluorescent X-ray analysis, and a specific surface area of at most 100 m2/g as measured by nitrogen adsorption BET method. The carbonaceous material is advantageous produced by carbonizing a carbon precursor of plant origin having a potassium content of at most 0.5 wt. % as measured by fluorescent X-ray analysis, in contact with a stream of an inert gas optionally containing a halogen gas at a temperature of 700-1500° C.

The invention belongs to the technical field of preparation of phase-change microcapsules, in particular to a preparation method of a phase-change energy-storage microcapsule and the phase-change energy-storage microcapsule. A preparation technology of the phase-change energy-storage microcapsule provided by the invention comprises the following step of: coating a phase-change material inside micron and/or nano particles by adopting a melting and coaxial electronic injection method to form the phase-change energy-storage microcapsule with a core-shell structure. The phase-change energy-storage microcapsule provided by the invention has a core-shell structure constructed by a shell material and an organic phase-change core material packaged in the shell material; and the microcapsule has a phase-change energy-storage property. A melting and coaxial electronic injection preparation process provided by the invention has a simple process, and can be used for preparing a micron and/or nano-scale capsule; the capsule has high dispersity and a large specific surface area.

The present invention is a high-sensitivity insulation resistance detection method and circuit for an ungrounded DC power supply systems. When the ratio of the voltage of the positive bus to that of the negative bus exceeds a preset range, the DC current is injected into the ungrounded DC power supply systems. DC power supply systems have essentially some grounded stray and external capacitors, so some of the injected DC current will flow into the grounded capacitor, increasing the voltage of the fault bus and the leakage current. The proposed method increases the leakage current by the injection of DC current, so the current sensor can detect the leakage current from which the insulation resistance can be calculated. The DC current injection method can significantly improve the detection of ground insulation faults in ungrounded DC power supply systems.

The invention belongs to the field of micron-nanometer material preparation and application, more particular relates to a multi-cavity composite micron/nanometer capsule and a multi-cavity micron/nanometer ball as well as the preparation method and device thereof. The multi-cavity composite micron/nanometer capsule is of a ball structure with micron and nanometer size, a plurality of cavities are arranged inside the ball, and the number of the cavities can be controlled; the cavities are separated and mutually independent by inner walls made of shell material; the cavities can respectively load different nuclear materials or same nuclear material, and the variety, the number and the distribution in the ball can be accurately controlled; the nuclear materials are mutually independent, do not contact mutually and do not contact with the outside environment directly; the shell material which forms the multi-cavity composite micron/nanometer capsule is different from the nuclear material; and the nuclear materials are selectively removed to obtain the micron/nanometer structure with multiple cavities. The preparation method is a multiple-fluid composite electric injection method, and the device has the characteristic that a multiple-fluid composite spray head is adopted. The multi-cavity micron/nanometer capsule provided by the invention is applied to coatings for environment sensitive materials and reactive materials, and the like.

A method to treat ballast water comprises injecting ozone into water loading into a sea faring vessel prior to charging the water into a ballast tank; and charging the ozone injected water into the ballast tank. A system for treating ballast water comprises a sea faring vessel including at least one ballast tank; an ozone generator that generates ozone, a ballast water conduit that uptakes water through a loading port of a sea faring vessel and conducts the water to load the ballast tank; and an ozone feed line that injects ozone from the generator into water in the conduit at an injection point located upstream to an intersection of the conduit with the ballast tank.

The invention discloses a surface-mount permanent magnet synchronous motor rotor initial position detection method. The method includes the steps that a high-frequency voltage injection method is adopted for achieving d-axis positive direction judging by extracting d-axis positive direction information included in double injection signal frequency subharmonic in d-axis current responses on the basis of achieving the estimation of an initial position. According to the method, the action of injecting positive and negative pulses additionally and then comparing values of amplitude of the current response is not needed, estimation time is shortened, the estimation process is simplified, the requirement for the precision of current detection is lowered, in addition, tender moving of a rotor can be avoided, and application occasions are broadened.

The invention provides a foaming agent for low gas liquid ratio foam flooding for improving recovery ratio of common heavy oil reservoir and an injection method thereof. The foaming agent is prepared from a nonionic-anionic surfactant, a betaine type amphoteric surfactant and water, wherein the nonionic-anionic surfactant accounts for 0.01 to 0.03 weight percent of the total weight; the betaine type amphoteric surfactant accounts for 0.05 to 0.3 weight percent of the total weight; and the balance is oil field injection water. The foaming agent has good foaming tendency, can reduce the interfacial tension of oil and water to the lowest under the condition of not adding alkali, and can give full play to the foam flooding and the improvement of conformance factor and displacement efficiency. On the basis of the foaming agent, when the gas liquid ratio is between 0.1:1 and 0.3:1 (volume ratio), the generated foam can improve the recovery ratio by over 10 percent, and the technology with low cost and good effect for improving the recovery ratio of the heavy oil reservoir is realized.

The invention discloses a liquid formulation containing imidacloprid for trunk injection, which comprises (by weight ratio) the following raw materials, imidacloprid 1.0-8.0%, insecticidal agent 0.01-15.0%, surface active agent 1-10%, and balancing solvent. The agent is applied mainly through dry injection method and can be use for controlling various insects on trees.

The invention discloses a device for preparing superfine spherical high-melt-point metal powder for 3D printing. The device comprises a shell, a crucible disposed in the shell and a collecting bin disposed on the lower portion of the shell. The device is characterized in that a thermal coupler is disposed inside the crucible, and a heating band is disposed outside the crucible; the collecting bin is fixed with the shell through a support, an annular descending pipe is disposed between the shell and the collecting bin, a centrifugal plate is disposed at a position, which is opposite to the lower end of the annular descending pipe, in a collecting bin cavity, the centrifugal plate is supported by a support column, and a collecting groove is formed in the bottom of the collecting bin. The invention further discloses a method for preparing the superfine spherical high-melt-point metal powder for 3D printing. The method combines a pulse micro-pore injection method and a centrifugal atomizing method. The method and the device have the advantages that the high-melt-point metal powder satisfying requirements can be prepared efficiently, and the prepared metal power is controllable in particle size, narrow in particle size distribution interval, high in sphericity, free of satellite droplet, good in flowability and spreading property, high in production efficiency, low in cost and suitable for industrial production.

An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure monitoring, saline flushing, or aspirating functions. When an injection is to be made, the valve automatically switches so that the low pressure system is disconnected and not exposed to high pressure, while the syringe pump is connected through the manifold to the catheter.

A process having three steps utilized individually or in combination to reduce nitrogen oxides, NO_x, emissions from gas turbines. One or more injectors disperse very fine fuel droplets to achieve rapid and complete combustion in zone one immediately downstream of the fuel injectors. The second step uses one or more injectors inserted into the combustor to disperse water droplets throughout zone two, immediately downstream of zone one, to lower the gas temperature and suppress formation of thermal NO_x,. The third step uses one or more injectors to disperse aqueous droplets containing a dissolved NO_x reducing agent throughout zone three, immediately downstream of zone two, and whose gas temperature favors the reduction of NO_x. Alternatively, the dissolved NO_x reducing agent can be mixed with a liquid fuel to convert zone three into slightly fuel rich conditions, enabling nitrogen oxide reduction at higher gas temperatures.