The family is at home on a Saturday afternoon

playing board games together. Already during the afternoon, two family members

have a headache and feel slightly dizzy. In the evening, the situation worsens

and the younger daughter starts vomiting and is noticeably sleepy. The parents

take her and her older sister, who is also unwell, to the emergency. There, it

is discovered that the cause is carbon monoxide poisoning, which the whole family

has poisoned during the afternoon and evening thanks to the broken tankless gas

water heater in the bathroom. Carbon monoxide binds to hemoglobin about 210

times more strongly than oxygen, forming carboxyhemoglobin and occupying oxygen-binding sites. The result is tissue anoxia. Which of these parameters will be

reduced as a result of carbon monoxide poisoning?