Oxygen Therapy Remote Monitoring in COPD Patients.

Impact of long term oxygen therapy on heart rate

For each patient, the average and maximum daily heart rate (expressed as beats/minute) will be measured on period of 14 consecutive days at different times after the initiation of oxygen therapy (weeks 6 to 8, and then weeks 12 to 14). The heart rate is measured by the connected watch all along the day.

Time frame: Month 2, Month 3.5

Impact of long term oxygen therapy on oxygen saturation in the blood (SpO2)

For each patient, the average nightime and daytime SpO2 (expressed in %) will be calculated by period of 14 consecutive days at different times after the initiation of oxygen therapy (weeks 6 to 8, and then weeks 12 to 14). The SpO2 is measured by the connected watch (automatically at night and manually in day).

Time frame: Month 2, Month 3.5

Impact of long term oxygen therapy on the respiratory rate

For each patient, the median, maximum, and 95th percentile daily respiratory rate (expressed in cycles/minute) will be measured on period of 14 consecutive days at different times after the initiation of oxygen therapy (weeks 6 to 8, and then weeks 12 to 14). The respiratory rate is measured using the TeleOx medical device placed in each oxygen source (fixed and portable sources).

Time frame: Month 2, Month 3.5

Impact of long term oxygen therapy on the physical activity in terms of duration of effort

For each patient, the total duration of effort per day (expressed in hours) will be measured on period of 14 consecutive days at different times after the initiation of oxygen therapy (weeks 6 to 8, and then weeks 12 to 14). The total duration of effort is measured by the connected watch.

Time frame: Month 2, Month 3.5

Impact of long term oxygen therapy on the physical activity in terms of duration of number of steps

For each patient, the total number of steps per day will be measured on period of 14 consecutive days at different times after the initiation of oxygen therapy (weeks 6 to 8, and then weeks 12 to 14). The number of steps is measured by the connected watch.

Time frame: Month 2, Month 3.5

Impact of long term oxygen therapy on the health related quality of life of COPD patients

The quality of life will be assessed using the COPD-specific health related quality of life questionnaire named VQ11. The questionnaire VQ11 comprises 11 items distributed across three components (functional: 3 items, psychological: 4 items, social: 4 items). The global score ranges from 11 to 55 points; higher scores mean a better quality of life.

Time frame: At oxygen therapy initiation (baseline), Month 2, Month 3.5

Impact of long term oxygen therapy on the respiratory function

The pulmonologist will assess the evolution of respiratory function according to good medical practice with the pulmonary functional tests. Based on the VEMS/CV value (expressed in %), the pulmonologist judges if the prescribed long term oxygen therapy is sufficient to normalize the respiratory function or if the treatment must be modified.

Time frame: At inclusion, Month 6

Assessment of exacerbation

The pulmonologist will assess the number of exacerbation that occured during the first 6-months of long term oxygen therapy.

Time frame: Month 6