Abstract: A nasopharyngeal catheter for administration of oxygen and monitoring for a patient includes a first catheter having a first lumen, and a second catheter having a second lumen. The first end of the first catheter is operably connected to an oxygen source, the second end of the first catheter operably runs to the posterior oropharynx of the patient, and the first lumen is adapted for oxygen delivery. The second catheter is attached to the first catheter, and the second lumen is adapted for capnography monitoring. The nasopharyngeal catheter further includes an in-line pressure release valve placed proximate to the first end of the first catheter for monitoring pressure of a patient. The nasopharyngeal catheter may also include a pH monitoring sensor for monitoring breath and risk of gastric content translocation of a patient.