"Pulse oximeter shows the oxygen saturation level.
"For screening and to detect any respiratory problems of patients, we are using pulse oximeters," said Dr Mohd Rizwan of Calcutta National Medical College and Hospital.
"The demand for the pulse oximeter has grown exponentially in the city.
There is a short supply of pulse oximeters in the surgical retail stores," pointed out Mittal.
Depending upon the quality, the cost of pulse oximeters ranges between Rs 1,500 and Rs 5,000.