Common Gas Chromatograph Faults and Troubleshooting

Practical troubleshooting guide for gas chromatograph faults: no peaks after injection, baseline issues, missing peaks due to contamination or column degradation.

Liquid Sensing From Water to Blood

Overview of impedance measurement techniques for medical liquid sensing, covering EIS, potentiostat, pH/conductivity methods and an ADuCM355 integrated front end.

Applications and Principles of Laser in Ophthalmology

Overview of laser ophthalmology: wavelength-dependent tissue absorption and mechanisms—photothermal, photochemical and photomechanical effects in ocular therapy.

Simplifying Portable Medical Device Design with Analog ICs

Describes single-chip portable medical devices using an ultra-low-power MCU with integrated analog front end: op amps, 12-bit ADC/DAC, DAC-based AGC and low-power design.

Two Primary Methods for Measuring Heart Rate

Overview of heart rate monitoring techniques for wearables, comparing optical PPG/pulse oximetry and bioelectric ECG approaches, with AFE design and power considerations.

Multispectral Optical Measurements for Advanced SpO2 and HRM

Reference design for multispectral PPG-based heart-rate and SpO2 monitoring using the AFE4420, with time-multiplexed LEDs/PDs and low-power coin-cell operation.

Ultrasound Smart Probes: From Trolley to Handheld

Overview of challenges in designing ultrasound smart probes: power, size, channel count, per-channel power, data processing and transmission for handheld imaging.

GSM-Based Remote Medical Automatic Alert System

GSM-based remote medical alert system design for elderly: MSP430-controlled vital-sign monitoring and ADXL345 fall detection with GSM transmission and central-station alerts.

Design and Testing of a Wearable Wireless ECG Recorder

Design and test of a low-power wearable wireless ECG recorder using ADS1191, with Bluetooth streaming, wireless charging, and validated input impedance, CMRR, frequency response.

Mobile Health in Clinical Closed-Loop Management

Mobile nursing and closed-loop management in hospital IT: bedside PDA barcode verification and EMR-level workflows to improve patient safety and care quality.