Shenzhen Mindray Bio-medical Electronics Co., Ltd.

Imed Technology, Inc.

Shenzhen University

Xiaoyu Wu

Jian Cen

Kyle S Adams

Shunan Li

Yu Sun

Bing Wang

Qiling Liu

Fumin Chen

Chaolan Zhou

Yanjun Lu

Qiyang Peng

He Bo

Jiatao Zhang

Bo He

Feeding tube set inlet component

A micro-structured mold-core of a microfluidic chip and its manufacturing method, which includes the steps of: installing a mold-core on a worktable of a five-axis machining center, and installing a micro-milling cutter and a fine milling-grinding tool on a tool holder of the five-axis machining center; rough-milling a surface of the mold-core using the micro-milling cutter according to a preset first machining track, to form a micro-projection array structure with a specific shape; finishing a surface of the micro-projection array structure formed by rough-milling using the fine milling-grinding tool according to a preset second machining track, to form a desired micro-projection array structure; and installing the mold-core on an injection molding machine, and adding particle material of polymer for micro injection molding to form a microfluidic chip, or installing the mold-core on a hot-embossing machine, and adding block material of polymer for hot embossing to form a microfluidic chip.

Micro-structured mold-core of microfluidic chip and its manufacturing method

This disclosure relates to bioelectric signal detecting circuits, lead wire detecting circuits and medical devices. The lead wire detecting circuit may include a reference voltage generator, at least one comparator, and a logic control module, wherein input ends of the comparator are connected to an output end of the reference voltage generator and an signal output end of a lead wire, respectively, for inputting a reference voltage and a lead signal, and the comparator compares the lead signal with the reference voltage and changes an output voltage at an output end of the comparator according to a comparison result; wherein an input end of the logic control module is connected to the output end of the comparator, and the logic control module determines whether the lead wire is in a connected state or disconnected state by the output voltage at the output end of the comparator.

Bioelectric signal detecting circuits, lead wire detecting circuits and medical devices

An apparatus for suppressing power frequency common mode interference in a bioelectrical signal measuring system includes a driving circuit configured to amplify and change the phase of a common mode interference signal to produce a first driving signal, wherein the common mode interference signal is extracted from a plurality of first electrodes attached to a patient; phase compensating and processing circuitry electrically connected to the driving circuit for receiving the first driving signal, the phase compensating and processing circuitry configured to produce a second driving signal by phase-compensating the first driving signal based on a characteristic value of power frequency interference in a bioelectrical signal acquired through the plurality of first electrodes; and a switch to receive the first driving signal and the second driving signal, the switch configured to selectively switch between providing the first driving signal and providing the second driving signal to a second electrode attached to the patient.

Method and apparatus for suppressing power frequency common mode interference

The present invention discloses a non-invasive blood pressure measurement apparatus and a safety protection method. In addition to a main pressure measurement circuit and a main microprocessor circuit, the measurement apparatus also includes an independently disposed assist pressure measurement circuit and an independently disposed assist microprocessor circuit. In normal measurement, the assist microprocessor circuit periodically samples a cuff pressure via the assist pressure measurement circuit, and compares the measured cuff pressure with a specified overpressure protection value, and if the cuff pressure exceeds the specified overpressure protection value, the assist microprocessor circuit outputs a control signal to open a deflation valve until the pressure falls to below the safety pressure. Compared with the prior art, the method for overpressure protection of the present invention is more direct and has higher accuracy of decision, leading to higher reliability of the overpressure protection and higher safety of the measurement apparatus.

Non-invasive blood pressure measurement safety protection method and apparatus

A circuit for measuring respiratory waveform with impedance method and a method and device for resisting electrical fast transient interference are provided, and wherein an output from the peak detector circuit and a reference signal are input to two input terminals of the comparator circuit, an output terminal of the comparator circuit is connected to a control terminal of the electronic switch, and one terminal of the electronic switch is connected to an output terminal of the signal amplifier circuit and the other to an input terminal of the demodulator/amplifier circuit. If a level of the output signal of the peak detector circuit is greater than the level of the reference signal, the electronic switch is switched off in response to an inversion of the output of the comparator circuit so that the interference is isolated from the next stage circuit. The present invention is prone to be implemented with significant effect.

Circuit for measuring breath waveform with impedance method and method and device for resisting interference of electrical fast transient

A method for suppressing power frequency common mode interference comprises the following steps of: receiving a bioelectrical signal from a living body on examination by phase compensating and processing circuitry; analyzing the characteristics of the bioelectrical signal and determining a phase compensation amount by the phase compensating and processing circuitry; performing a corresponding time delay processing on an amplified signal outputted by the driving circuit; and providing the delay signal to the living body on examination.

Non-invasive blood pressure measurement apparatus and safety protection method

Growing community of inventors

Shenzhen, China

Xiaoyu Wu