My husband had a liver transplant six weeks ago. The After the transplant, it was discovered he has hepatopulmonary Syndrome, a complication of liver failure. The new liver is doing well, and this transplant is the cure for hepatopulmonary Syndrome. But the healing process for the lungs takes between six months to a year. He is currently on oxygen, and he has not yet seen the lung specialist--though he has an appointment.

He has a home oxygen concentrator, and we usually set it between 4LPM to 8LPM. His levels drop when he sits or stands. For our frequent, required trips to the doctor, we must bring an oxygen tank, and the oxygen runs out during our one-hour-trip unless we set the tank to 3LPM or lower.

Should this worry us? We measure his oxygen via a finger monitor. What if his oxygen drops below 85? Is this okay for the duration of the trip? I'm concerned this may harm him.