13 results about "Microdosing" patented technology

The invention provides a method for calculating micro-dosimetry parameters and statistical errors thereof in alpha radiopharmaceutical radiation biological effect prediction under a microscopic heterogeneity condition. The method comprises the following steps: (1) constructing a stylized cell community model with microstructure heterogeneity, and describing heterogeneity spatial distribution of alpha radiopharmaceutical source items; (2) using a Monte Carlo method to simulate energy deposition information generated by each region source item to a cell nucleus target region; (3) calculating key micro-dosimetry parameters and statistical errors of the cell nucleus and the intranuclear radiation sensitive domain under the complex source item based on a micro-dosimetry principle and a probability method; and (4) predicting the survival score in the cell community based on the microdosimetry radiobiologic effect model, and performing error control and relative biological efficiency calculation. The method is used in the field of alpha radiopharmaceutical dose evaluation, can realize composite analysis and error control of micro-dosimetry parameters in a more real scene model, and provides technical support for research, development and conversion of alpha radiopharmaceuticals.

The application provides a piston driving device for a continuous micro-dosing device and a working method, which comprises the following steps: under the action of a control device, a force storage and release device releases a specified piston stroke, and a force storage device outputs a linear thrust to push a piston push rod device to move in a specified direction for a specified piston stroke. By adding a sufficient amount of liquid medicine into a medicine storage device, the control device obtains an injection instruction or an injection program inputted from outside, and the control device starts to control the force storage and release device to release the specified piston stroke, and the force storage device outputs a linear moment to push the piston push rod device to move in the specified direction for the specified piston stroke. The force storage device is used as a power source to push the piston by a direct pushing mode, the required pulse number is calculated according to the required dose or the distance of the piston movement, the control device is used to accurately control the force storage and release device to release the specified piston stroke, the accuracy of the dosing dose is improved, and the structure is simple and the cost is low.

A microdosing device and a method for dispensing droplets from a plurality of nozzles are presented. The microdosing device comprises a cartridge, in which at least a part of a dosing chamber and the plurality of nozzles are formed, wherein the dosing chamber is fluidically connected to a fluid inlet and the plurality of nozzles. The microdosing device further comprises an actuator which is configured to change a volume of the dosing chamber to thereby eject a droplet from each of the plurality of nozzles, and a pressure sensor which is configured to generate a pressure signal dependent on a pressure in the dosing chamber. In addition, the microdosing device comprises a liquid reservoir which is fluidically connected to the fluid inlet, and a pressure control device provided separately from the actuator which is configured to control a pressure in the liquid reservoir on the basis of the pressure signal.

Described are compositions, kits and methods for preventing, minimizing the risk of, or treating a microbial infection at a wound or surgical site. The method comprises injecting a combination of a therapeutically effective microdose of a microbial agent and a local anesthetic into the dermis layer of the skin. The composition can be administered by medical personnel, provided by non-clinical personnel, or self-administered.

This invention discloses a voxel-based system and method for determining the equivalent biological dose of targeted alpha nuclide therapy. The system constructs a patient-specific three-dimensional voxel anatomical model and activity distribution map through an image processing module; an intelligent source term module, based on the decay characteristics of the selected alpha nuclide, calls a pre-built dose point kernel database to generate an equivalent total dose point kernel; a dose calculation module performs rapid convolution calculation based on cumulative activity and the equivalent total dose point kernel to obtain the three-dimensional physical absorbed dose; and a biological dose module integrates a micro-dose kinetic model to convert the physical dose into a three-dimensional biological dose distribution map equivalent to conventional external beam radiotherapy. This invention overcomes the technical shortcomings of standard models, such as large errors, time-consuming Monte Carlo simulations, reliance on multi-timepoint dynamic imaging, and the inability of physical dose to reflect the biological effects of alpha particles. It achieves efficient, accurate, and clinically practical individualized biological dose assessment, significantly improving the accuracy and safety of treatment plans.

This invention relates to a micro-dose insecticidal aerosol composition for controlling disease-transmitting insects, whether flying or crawling. The micro dose insecticidal aerosol composition in one single actuation, comprises pyrethroid insecticide in hydrocarbon solvent, capable of generating particles in the air and in the environment with particle diameter D50 ≤ 0,15 µm corresponding to 500 to 800 mg of the composition applied every 5 m3.

This invention provides a piston motion system and operating method for a continuous micro-dose delivery device. The system includes a power-release device releasing a specified piston stroke under the action of a control device. The power-release device outputs a rotational torque to drive the piston body of the piston pusher device to move along a specified direction for the specified piston stroke. Sufficient drug solution is added to the drug storage device. The control device receives an externally input injection command or injection program. The control device initiates control of the power-release device to release the specified piston stroke, and the power-release device outputs a rotational torque to drive the piston body of the piston pusher device to move along a specified direction for the specified piston stroke. By driving the piston through the output rotational torque, the required number of pulses can be calculated based on the required infusion dose or piston movement distance. The control device precisely controls the power-release device to release the specified piston stroke, which helps improve the accuracy of drug delivery. Furthermore, the system is simple in structure and low in cost.

A continuous micro-dose administration apparatus includes a needle apparatus, a drug storage apparatus, a piston push rod apparatus, a force accumulating apparatus, an accumulated force release apparatus, and a control apparatus. Under the action of the control apparatus, the accumulated force release apparatus releases a specified piston stroke, the force accumulating apparatus pushes the piston push rod apparatus to move into the drug storage apparatus by the specified piston stroke, and drug liquid in the drug storage apparatus is discharged through the needle apparatus. With the force accumulating apparatus as a power source, the piston body is pushed by means of rotation or direct pushing, a required number of pulses is calculated according to a dose to be infused or a distance moved by the piston, and the control apparatus accurately controls the accumulated force release apparatus to release the specified piston stroke, thereby improving the dose administration accuracy.

The invention discloses a push type injection pump for micro-administration, and relates to the technical field of medical instruments. The supporting seat is mounted on one side of the top end of the injection pump table; the clamping mechanism is mounted on the other side of the top end of the injection pump table; the propelling mechanism is mounted between the opposite surfaces of the supporting seat and the clamping mechanism; through cooperative work of the precise screw rod, the propelling driving assembly, the propelling nut, the ball return groove, the multiple ball bodies, the mounting frame and the cleaning block, the precise screw rod is matched with a ball raceway on the inner wall of the propelling nut, and rolling transmission of the ball bodies and circulating guiding of the ball return groove are combined, so that the gap problem of a traditional transmission structure is thoroughly solved; meanwhile, the cleaning block on the mounting frame synchronously cleans impurities on the surface of the lead screw in the propelling process, the situation that the impurities affect the transmission precision is avoided, and then the strict requirement for clinical precise micro-dosage can be met.

The present application relates to compositions comprising flumazenil and naltrexone and methods of use thereof. In particular, the present invention relates to a pharmaceutical composition comprising a microdose of flumazenil and a microdose of naltrexone, or a pharmaceutically acceptable salt thereof, where the flumazenil and naltrexone are present in a weight ratio of about 25: 1 to about 10: 1, where the composition is in the form of a single dose unit, and wherein the single dose unit comprises flumazenil in an amount that provides a daily microdose in the range of about 250 to about 7,500 micrograms and naltrexone in an amount that provides a daily microdose in the range of about 25 to about 1,000 micrograms. The present invention also relates to methods of treating depression and / or anxiety and / or post traumatic stress disorder (PTSD) using a combination of flumazenil and naltrexone.

Devices, systems, and methods are provided herein for delivering medication (e.g., insulin) via a wearable pump having a patch-style form factor for adhesion to a user's body. The reusable pump may be coupled to a disposable cap housing a microdosing system for delivering precise, repeatable doses of medication to a cannula configured to deliver medication to a target infusion area beneath the user's outer skin layer. The system further may include an applicator for inserting the cannula into the user's skin and / or applying an adhesive pad to the skin.