Case 1 involved a 70-year-old man with a medical history of chronic obstructive pulmonary disease (COPD), hypertension (HT), and rectal cancer. He had a body mass index (BMI) of 28.3kg/m2 and a score of 2 on Epworth sleepiness scale (ESS) and was scheduled for an open abdominal surgery. One day prior to the surgery, he performed an apnea test (via ApneaLink™) between 00:00 and 06:00 am which yielded the following results: AHI: 17/hr, AI: 3/hr, HI: 14/hr; ODI: 3/hr, minimum SpO2 (min. SpO2) 79%, and maximum HR (max. HR): 124/min. A decision was made for postoperative ICU follow-up of the patient.\nFollowing the three-hour long surgery, the intubated patient was admitted to the ICU, where he was extubated four hours later and given O2 mask support (5L/min). The results of an apnea test conducted on the operation day between 00:00 and 06:00 am were as follows: AHI: 21/hr, AI: 4/hr, HI: 17/hr, ODI: 1/hr, min. SpO2: 84%, and max. HR:131/min. It was decided that he should be scheduled for postoperative noninvasive mechanical ventilation (NIMV) support (Table ).
Case 8 involved a 42-year-old man with a diagnosis of hypertension who presented to the ICU unconscious and after a 20-minute resuscitation. His pupils were with fixed and dilated, his GCS score was 3, he was orally intubated, and had hypotension following a loss of consciousness and cardiac arrest. After detecting a subarachnoid hemorrhage in his cranial CT scan, he was started on anti-edema therapy and sedative medication. The cerebral angiogram performed twelve hours after admission to the ICU showed that there was no cerebral hemorrhage, and so a standard apnea test was performed with ApneaLink™ recording the apnea data. After nine minutes, his PaCO2 value increased from 41 to 76mmhg and ApneaLink™ showed that there was no respiratory effort present. This demonstrated that the presence of apnea can be seen and recorded by ApneaLink™ during the apnea test.\nAll patients were Caucasian.