Figure 9From: Simultaneous sleep study and nasoendoscopic investigation in a patient with obstructive sleep apnoea syndrome refractory to continuous positive airway pressure: a case report A nocturnal oximetry under inspiratory pressure of 20 cmH20, expiratory pressure of 13 cmH20 with Oracle ® at 6.5 months after the initial presentation. A home oximetry under bilevel mode, inspiratory pressure of 20 cmH20 and expiratory pressure of 13 cmH20 and Oracle® mask revealed a significant improvement in nocturnal desaturation episodes.Back to article page