ECG CALIBRATION: Two reports, one at 1mV/10Hz signal source traceable to NPL standards and the other one at 1mV/1Hz signal source (uncalibrated) on the calibration of 12 leads ECG machine were prepared for the uncertainty measurements. The bio-simulator producing sine, square and triangular waveform at 1mV with variable frequencies got calibrated against a primary standard source of 1 mV/10Hz at NPL and subsequently put in use as a secondary standard source for further calibration of ECG machines. To get the report internationally accepted, efforts are being made with NPL UK to get the bio-simulator signal source calibrated at 1mV/1Hz, which is the standard amplitude frequency combination of ECG signal.

Web based real time ultra low value (ecg, eeg) signal transmission for patients monitoring and diagnosis system using lab-view platform

A versatile, cost effective and application oriented web based real time patient monitoring and diagnosis system employing systems and devices like internet, PCs and specially developed graphical user interface (GUIs) in lab-view environment was developed. Biomedical Data of the patient such as body temperature, pulse rate, ECG etc. from different sensors and electrodes put around the patient body are acquired and transmitted using FM transmitter (108 MHz) after proper signal conditioning and amplification. The received signal by FM receiver tuned at the same basic frequency is further acquired by NI lab-view data acquisition card (PCI-6281) and processed to find out vital parameters such as QRS intervals, QT intervals and beat to beat (R-R) intervals. These parameters/ waveform are displayed on local PC (patient side) as well as on remote PC (doctor side) for on line patient monitoring. The automatic emergency condition detection is a new
concept in the system’s automation, where the software detects an alert stage of the patient and connects patient with the doctor automatically for immediate diagnosis and treatment. The complete system is shown in the following block diagram.

Status

The system is in per-fact working stage and can be demonstrated to outside agencies for further suggestions and improvements. The proposal, in fact has been presented to FICCI committee chaired by DGCSIR a few months ago.