A British doctor of Pakistani origin saved the life of an elderly woman on a flight with the help of an Apple Watch.

According to the British broadcaster BBC, Dr. Rashid Riaz of the National Health Service (NHS) from Hereford, England, was going to Verona from Birmingham for a vacation. He was on a flight when a 70-year-old woman’s condition suddenly deteriorated, leading ti difficulty in breathing.

Seeing the condition of the woman, the flight attendant asked if there was a doctor on board, upon which Dr. Rashid Riaz came forward to help.

After the initial check-up, he wanted to check the patient’s oxygen saturation level but was unable to do so using the equipment on the flight. He then asked the crew if there was an Apple Watch available to monitor the woman’s health. “The Apple Watch helped me find out the patient had low oxygen saturation,” the doctor told the BBC.

He used local health monitoring software to estimate levels.

Dr. Rashid Riaz said that the woman was suffering from heart disease and with the help of Apple Watch, it was easy for him to detect the decreasing oxygen level of the elderly woman, thus saving her life by providing oxygen.