経鼻 けいび内視 ないし きょうではありませんでした
keibi nai shikyōdewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 経鼻内視鏡

1. Was not a nasal endoscope.; Was not a nasal endoscopy.

Past/Perfective
Negative
Polite
Formal Register