高圧 こうあつ酸素 さんそ療法 りょうほうじゃなかったです
kōatsusansoryōhōjanakattadesu

Noun
Desu Copula

The polite, past negative form of 高圧酸素療法

1. High-pressure oxygen therapy wasn't.; It wasn't high-pressure oxygen therapy.

Past/Perfective
Negative
Polite
Casual Register