98results about How to "Improve dose accuracy" patented technology

A brachytherapy applicator and method of use involve source guides that assume a desired curving, non-linear configuration. A flexible source catheter follows the shape of the source guides when inserted therein. Radiation dose received in various tissue areas can be better controlled using the invention, and the ratio of cavity surface dose to prescription depth dose can be lowered. With sequential manipulation of the source via movement of the catheter, the applicator can deliver radiotherapy to a treatment plan with local variation to prevent overdose, through either stepped or continuous movement of the source. Source guides can be fixed in position and arranged in bowed configuration around a generally central balloon axis, either attached to the balloon wall or not, and the series of off-center guides can be used to shape the dose delivered.

A drug delivery assembly includes a housing (110), a piston (120) axially displaceable in the housing, and a variable volume reservoir (105) formed by the housing and the piston and containing a fluid first drug. The assembly further includes an exterior fluid inlet (150) arranged in or configured to be arranged in fluid communication with the reservoir, a fluid outlet (145) arranged in or configured to be arranged in fluid communication with the reservoir, biasing means (130) configured for moving the piston forwards, and releasable retaining means (113) configured for retaining the piston in an initial position, whereby the biasing means is allowed to move the piston forwards to expel fluid drug from the reservoir when the retaining means is released.

The invention relates to: A medication delivery device (1) for delivering a specific dose comprising a medication cartridge (11) having an outlet (111) and a piston (112), and means (12) for holding said cartridge, and a piston rod (13) being operable to engage and displace said piston, and electrically driven actuating means (15), and driving means (161, 162) for transferring movement from said actuating means to said piston rod, and memory means (17) for storing data, and processing means (18) for evaluating said data and for controlling said actuating means. The object of the present invention is to provide a medication delivery system that combines a relatively high dose accuracy with the use of relatively low quality mechanical components and which enables compensation for built-in non-linearities. The problem is solved in that a first set of data (19) describing the actual movement (130) of said piston rod (13) relative to said medication cartridge (11) as a function of the movement (150) of said actuating means (15) is stored in said memory means (17), and the movement (130) of the piston rod (13) governing the delivered dose is controlled by the processing means (18) on the basis of said first set of data (19). This has the advantage of allowing compensation for mechanical inaccuracies and built-in non-linearities linearities. The invention may e.g. be used in injection or infusion devices for a person's self-treatment of a disease such as diabetes.

The invention belongs to the field of extraction equipment for pretreatment of samples, and discloses automatic solid phase extraction equipment. The automatic solid phase extraction equipment comprises a stand, a sample injection device, a sample turntable, an extraction column turntable, a liquid feeding device, a pressure device, an extraction liquid turntable and a control device, wherein the sample turntable, the extraction column turntable and the extraction liquid turntable are successively mounted on the stand from high to low in a horizontal rotation manner; multiple extraction column support holes are formed in the circumference of the outer edge of the extraction column turntable; multiple sample support holes and one liquid injection through holes are formed in the circumference of the outer edge of the sample turntable; multiple extraction liquid pipe support holes are formed in the circumference of the outer edge of the extraction liquid turntable; the sample injection device is used for extracting samples from a sample tube and injecting samples into the solid phase extraction column through a liquid injection through hole; the pressure device is used for feeding solvent into the solid phase extraction column; the control device is used for controlling operation of the whole extraction equipment. By adopting the equipment, the difficulty of labor operation can be lowered, and the testing effect can be improved.

Liquid interferon compositions having a pH between 4.0 and 7.2 are described. The compositions comprise interferon-beta and a stabilizing agent at between about 0.3 % and 5 % by weight which is an amino acid selected from the group consisting of acidic amino acids, arginine and glycine. If needed, salt is added to provide sufficient ionic strength. The liquid composition has not been previously lyophilized or previously cavitated. The liquid is preferably contained within a vessel having at least one surface in contact with the liquid that is coated with a material inert to adsorption of interferon-beta. A kit for parenteral administration of a liquid interferon formulation and a method for stabilizing liquid interferon compositions are also described.

A method and apparatus for the efficient and controllable delivery of cryogen liquid droplets into thin walled containers. Discharge of the droplets is facilitated using a horizontal displacement assembly to transport metered droplets from a liquid dosing unit to the point of injection above the container. The horizontal displacement assembly may be provided with internal heaters to prevent freeze up, and a sensor to confirm droplet discharge. It may also be provided with a separate source of heated nitrogen gas, which can be used to back purge the dispensing unit should it become clogged, to melt any frozen liquid occlusions which may have formed in the cryogen supply line.

The invention relates to a medical device for delivering at least one fluid. The technical problem of preventing after-dripping and at the same time improving the safety and the dose accuracy of a medical device is solved by a medical device comprising a reservoir (2), a bung (8), a piston (10), an electromechanical device (12) and a control unit (14). The reservoir, the bung, the piston and the electromechanical device controlled by the control unit are arranged such that the electromechanical device are instructed to move the bung via a piston over a predetermined distance and a fluid is ejectable from the reservoir by an advancing movement of the bung. Furthermore, the control unit is configured such that, after a dwell time following the advancing movement of the piston, the piston is retractable by the electromechanical device, wherein the control unit is configured sucht that, within the dwell time, the electromechanical device is moved with a second forward movement.

The invention discloses automatic medicine weighing equipment which comprises a frame, a medicine replenishing system, a medicine adding system and a weighing system, wherein the medicine replenishing system comprises a first rotary driving device, a swinging arm, a manipulator and a first medicine receiving bucket; and the medicine adding system comprises a medicine receiving container, a second rotary driving device, a detecting device, a linear swing combination cylinder, a medicine taking container and a medicine scraping apparatus. When the detecting device detects that medicines in the medicine receiving container are not sufficient, the medicine replenishing system replenishes the medicines into the medicine receiving container automatically, so that medicine replenishing efficiency is high; the medicine receiving container in the medicine adding system can add the medicines to the medicine taking container when rotating automatically, and the medicine taking container with a standard volume can add the medicines to the weighing system accurately, so that the medicine adding accuracy and the medicine adding efficiency are high; and the weighing system can weigh the weight-qualified medicines accurately, so that the weighing accuracy is high. According to the automatic medicine weighing equipment, the medicine weighing can be finished automatically, and an operator does not need to contact the medicine directly, so that the high working efficiency and the high safety are achieved.

An explosive loading device with ball rotary metering in explosive proof type is prepared as setting seal sleeve and bunker cover under bunker, setting fixed base and swing air cylinder on base plate, erecting ball on rotary shaft of air cylinder and opening a pair of metering holes at the same periphery on ball being closely contacted with seal sleeve, fixing diaphragm vibration air cylinder and recoil vibration absorber at two ends of base plate, setting fixed hopper on base plate and movable hopper and its lifting control air cylinder under fixed hopper and checking linear guide rail on base plate on track.

The invention relates to a metering device for the volumetric metering of pourable material, in particular of pharmaceutical powder or pharmaceutical granular material (1). The metering device comprises a housing (2) and a metering slide (3) which can be moved relative to the housing (2), the housing (2) and the metering slide (3) together defining a metering chamber (4). The metering slide (3) is designed as a vertical slide which, in normal operating position, has a vertical stroke axis (5). The housing (2) has a guide surface (7, 7') for the metering slide (3), said surface running in the direction of the stroke axis (5). The metering slide (3) has a limiting surface (8, 8') which corresponds to the respective guide surface (7, 7') and rests slidingly on the guide surface (7, 7'). Starting from the limiting surface (8, 8'), a metering recess (9') is made in the metering slide (3), and / or starting from the guide surface (7, 7'), a metering recess is made in the housing (2). The metering chamber (4), in a stroke position of the metering slide (3), in which the metering recess (9, 9') is covered by the guide surface (7, 7') and / or the limiting surface (8'), is formed by the metering recess (9, 9'), the guide surface (7, 7') and / or the limiting surface (8').

A drug delivery assembly comprises a housing (110), a piston (120) axially displaceable in the housing, and a variable volume reservoir (105) formed by the housing and the piston and containing a fluid first drug. The assembly further comprises an exterior fluid inlet (150) arranged in or configured to be arranged in fluid communication with the reservoir, a fluid outlet (145) arranged in or configured to be arranged in fluid communication with the reservoir, biasing means (130) configured for moving the piston forwards, and releasable retaining means (113) configured for retaining the piston in an initial position, whereby the biasing means is allowed to move the piston forwards to expel fluid drug from the reservoir when the retaining means is released.

The present invention belongs to the field of wastewater treatment, and particularly relates to a treatment system and method for treating pre-treatment wastewater of electroplating. The system and the method are used for solving the problems that an existing wastewater treatment system is unstable in operation, large in operating intensity, not accurate in dosage, high in cost, cannot solve the problem of shuffling of sludge and water and the water quality of discharged water cannot reach the standard. The treatment system for pre-treatment wastewater of electroplating provided by the present invention comprises an air flotation pretreatment system, a microelectrolysis treatment system, a biological aerated filter treatment system and a dosing system, wherein the air flotation pretreatment system, the microelectrolysis treatment system and the biological aerated filter treatment system are successively connected; the dosing system is separately connected with the air flotation pretreatment system, the microelectrolysis treatment system and the biological aerated filter treatment system.