STUDY OBJECTIVE: To evaluate the accuracy of the nasal septum site for pulse oximetry measurement of arterial oxyhemoglobin saturation (SpO2) in hypothermic patients. DESIGN: Prospective study. SETTING: Operating theater of a public hospital. PATIENTS: Fourteen hypothermic (temperature 34.6 degrees C to 36 degrees C) patients (eight males and six females) undergoing a major surgical abdominal procedure. INTERVENTIONS: Fifty estimations of SpO2 were simultaneously made by a flex sensor probe applied at the nasal septum site and by a finger sensor probe using a pulse oximeter. The results were compared with arterial oxygen saturation (SaO2) as measured by arterial blood gas sampling. MEASUREMENTS AND MAIN RESULTS: In 18% of the estimations, the finger probe produced unmeasurable results. The nasal septum probe did not produce any unmeasurable results (p = 0.0055). In the remaining 41 estimations, a comparison of the measurements from the nasal septum versus the controls showed a mean difference of 0.15 and a limit of agreement of -0.106 to +0.398. A comparison difference of 2.27 and a limit of agreement of 1.986 to 2.551. CONCLUSION: Monitoring SpO2 at the nasal septum site is more reliable than monitoring it at the finger site in hypothermic patients.
STUDY OBJECTIVE: To evaluate the accuracy of the nasal septum site for pulse oximetry measurement of arterial oxyhemoglobin saturation (SpO2) in hypothermicpatients. DESIGN: Prospective study. SETTING: Operating theater of a public hospital. PATIENTS: Fourteen hypothermic (temperature 34.6 degrees C to 36 degrees C) patients (eight males and six females) undergoing a major surgical abdominal procedure. INTERVENTIONS: Fifty estimations of SpO2 were simultaneously made by a flex sensor probe applied at the nasal septum site and by a finger sensor probe using a pulse oximeter. The results were compared with arterial oxygen saturation (SaO2) as measured by arterial blood gas sampling. MEASUREMENTS AND MAIN RESULTS: In 18% of the estimations, the finger probe produced unmeasurable results. The nasal septum probe did not produce any unmeasurable results (p = 0.0055). In the remaining 41 estimations, a comparison of the measurements from the nasal septum versus the controls showed a mean difference of 0.15 and a limit of agreement of -0.106 to +0.398. A comparison difference of 2.27 and a limit of agreement of 1.986 to 2.551. CONCLUSION: Monitoring SpO2 at the nasal septum site is more reliable than monitoring it at the finger site in hypothermicpatients.
Authors: Roshini Narayanan; Evan Bender; Raphael Chernoff; Luis Mendoza; Samuel Bernstein; Emma Turner; Stephen Mathai; Constanza Miranda Journal: Healthcare (Basel) Date: 2022-02-08