I need oxygen, I am not breathing well.
os-SI-ge-no — stress on second syllable. Respiro: re-SPI-ro — stress on second syllable.
Use this in a medical emergency on the plane when you are experiencing respiratory difficulty and need to alert cabin crew immediately.
Ho bisogno di (I need) + noun. Ossigeno (oxygen) — airlines carry portable oxygen on board. Non respiro bene (I am not breathing well) — respiro is present tense of respirare (to breathe). Bene (well) modified by non becomes poorly.
Mi sento mancare l'aria.
I feel like I am running out of air.
Mancare l'aria — idiomatic expression for feeling short of breath
Ho un attacco d'asma.
I am having an asthma attack.
Attacco d'asma — critical medical phrase for asthmatic passengers
C'è un medico a bordo?
Is there a doctor on board?
The classic emergency announcement — doctors are asked to identify themselves
All commercial aircraft are required by Italian and EU aviation law to carry medical oxygen and a defibrillator — cabin crew are trained in first aid and CPR.