Combined nasal and mouth ventilation mask

A method of ventilating a patient, comprising:

• applying a nasal mask over the patient's nose while leaving the patient's mouth uncovered, wherein the nasal mask having at least one opening, the at least one opening comprising a septum or valve therein, a closing of the septum or valve is actuated by pressure within the mask, and wherein the nasal mask further comprises a ventilation and/or oxygen port, wherein the at least one opening is adapted to receive a fluid passage of an oral chamber,
• inserting the fluid passage of the oral chamber into the at least one opening, thereby causing the septum or valve to open and to allow fluid communication through the fluid passage between the oral chamber and the nasal mask, and
• flowing a gas into the nasal mask through the ventilation and/or oxygen port to pressurize the nasal mask, and receiving the gas and exhalation of the patient from the nasal mask through the ventilation and/or oxygen port.