Imputation of Arterial Oxygen Partial Pressures Using Pulse Oximetry
The goal of this is prospective cohort study is to to study the relationship between PaO2 and SpO2 in the overall population undergoing general anesthesia in the OT. Secondary aims include studying the relationship between PaO2 and SpO2 in elderly and obese patients undergoing general anesthesia in the OT, validating the derivation of PaO2 from SpO2 using formulas derived by Rice et al. (2009), Pandharipande et al. (2009), and Gadrey et al. (2019) in patients undergoing general anesthesia in the OT, and, if the derivation formulas were not valid, to derive a formula for patients undergoing general anesthesia in the OT.

The included blood samples are arterial blood sample collected for ABGs analysis through either an arterial catheter or an arterial blood puncture in adult patients (Age >18 years) undergoing general anesthesia regardless of the acuity of the surgery (elective, emergency, or lifesaving), the hemodynamic stability of the patient, or the comorbidities. Patients undergoing cardiac or thoracic surgeries will be excluded.
- EligibilityCriteria: Inclusion Criteria:  Age >18 years Undergoing general anesthesia  Exclusion Criteria:  Patients undergoing cardiac or thoracic surgeries will be excluded. - Gender: All - MinimumAge: 18 Years - StdAgeList: Adult, Older Adult - StudyPopulation: The included blood samples are arterial blood sample collected for ABGs analysis through either an arterial catheter or an arterial blood puncture in adult patients (Age >18 years) undergoing general anesthesia regardless of the acuity of the surgery (elective, emergency, or lifesaving), the hemodynamic stability of the patient, or the comorbidities. Patients undergoing cardiac or thoracic surgeries will be excluded. - SamplingMethod: Non-Probability Sample