Obesity-Hypoventilation Syndrome (“OHS”) combines obesity and chronic hypercapnic respiratory insufficiency (excess CO2 in the blood). It is under-diagnosed and on the increase due to the growing prevalence of obesity and overweight [1] worldwide. The symptoms of OHS are not very specific (shortness of breath, daytime sleepiness, morning headaches, etc.) and it is very often associated with sleep apnea syndrome, in 80 to 90% of cases [2].
[1] https://revue-mir.srlf.org/index.php/mir/article/view/610
[2] https://cep.splf.fr/wp-content/uploads/2017/04/item-108_SOMMEIL-2017.pdf