Application of nasopharyngeal airway combined with noninvasive ventilation in elderly patients undergoing lower limb orthopedic surgery

Objective To investigate the values of nasopharyngeal airway combined with non-invasive ventilation(NIV) in lower limb orthopedic surgery of elderly patients.Methods From January 2014 to June 2014,64 elderly patients with lower extremity orthopedic surgery in General Hospital of Panzhihua Iron and Steel Group and Traditional Chinese Medical Hospital of Yaan were randomly divided into two groups,A and B.NIV was performed in all patients after intrathecal anesthesia,6.0-6.5 nasopharyngeal airway was placed in group B before NIV while group A simply received NIV.The indicators of blood gas analysis before NIV and 60 min after treatment were recorded and compared.Results Two patients in group A and one patient in group B withdrew from this research because of intrathecal anesthesia failure,30 patients in group A and 31 patients in group B were fit into statistics.Arterial oxygen saturation(Sa O2),arterial partial pressure of carbon dioxide(Pa CO2)and Pa O2/Fi O2 significantly improved after treatment in all patients(P 0.05).Pa O2/Fi O2 were significant improved in group B than those in group A(P 0.05),there were no significant differences in Sa O2,Pa CO2 between two groups(P 0.05).Conclusion Nasopharyngeal airway can significantly improve the effectiveness of NIV in elderly patients receiving lower extremity orthopedic surgery.