Alima Sari Sihotang, Pandiaman Pandia, Amira Permatasari, Putri Eyanoer Departemen Pulmonologi dan Ilmu Kedokteran Respirasi, Fakultas Kedokteran Universitas Sumatera Utara,RSUP H. Adam Malik Medan Abstract Background: Changes of air pressure, temperature and humidity on an altitude will result in a decrease of oxygen partial pressure and oxygen saturation, as well as drier air, and this […]