National

DRDO develops novel oxygen delivery system

Our Bureau Hyderabad | Updated on April 20, 2021

Developed for soldiers posted at high altitude areas, it comes as a boon in these pandemic times

The Defence Research and Development Organisation (DRDO) has developed SpO2 (Blood Oxygen Saturation) supplemental oxygen delivery system for soldiers posted at extreme high-altitude areas.

Developed by Defence Bio-Engineering & Electro Medical Laboratory (DEBEL), Bengaluru of DRDO, the system delivers supplemental oxygen based on the SpO2 levels and prevents the person from sinking in to a state of Hypoxia, which is fatal in most cases, if sets in. This automatic system can also prove to be a boon during the current Covid-19 situation.

Hypoxia is a state in which the amount of oxygen reaching the tissues is inadequate to fulfil all the energy requirements of the body. This situation that gets replicated in a Covid patient due to the virus infection and has been a leading factor in the current crisis.

The electronic hardware of the system is designed for functioning at extreme altitudes featuring low barometric pressures, low temperatures and humidity. The software safety checks incorporated into the system are critical in ensuring the functional reliability of the system in field conditions.

The system reads SpO2 levels of the subject from a wrist-worn pulse oximeter module through wireless interface and controls a proportional solenoid valve to regulate the oxygen supply to the subject. The oxygen is delivered from a lightweight portable oxygen cylinder through nasal nares. The system is available in various sizes from one litre and one kg weight with 150 litres of oxygen supply to 10 litres & 10 kg weight with 1,500 litres of oxygen supply which can sustain for 750 minutes with a continuous flow of two liters per min (lpm).

Since the system is indigenously developed for operation in field conditions, it is unique with its dual qualities of being robust & cheap and is already in bulk production with the industry.

The system comes as a boon in the current pandemic as it can be used in the household for moderate Covid patients for Oxygen flow therapy with flow controlled at 2/5/7/10 lpm flow. The automatic usage has huge advantage in the household, as the oximeter would give an alarm for lower SpO2 value. It will automatically increase/decrease the O2 flow based on SpO2 setting which can be auto adjusted at 2, 5, 7, 10 lpm flow rate. The optimal O2 flow rate conserves the O2 resources/O2 management and greatly increases the endurance.

With its availability and simple to use facility , the system shall greatly reduce the workload and exposure time of doctors and paramedics to monitor the SpO2 levels of patients.

Published on April 20, 2021

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