Proofreading: This paragraph just sounds awkward to me to begin with.
Carina was inspected at that time, which appeared sharp with no mucosal lesions noted. 2% Lidocaine was instilled over the carina. Right main stem bronchus was inspected next. Opening to the right upper lobe was inspected, however 2 areas of abnormality were detected. All 3 anterior, posterior, and apical, segments were visualized without any obstruction noted.
Answer:
Carina was inspected at that time, which appeared sharp with no mucosal lesions noted. Two percent lidocaine was instilled over the carina. Right main stem bronchus was inspected next. Opening to the right upper lobe was inspected; however, two areas of abnormality were detected. All three anterior, posterior, and apical segments were visualized without any obstruction noted.
All looks good in your correction. I'd add this in parentheses after the word "percent" -- (2%).
Proofread:
Carina was inspected at that time, and it appeared sharp with no mucosal lesions noted. Two percent lidocaine was instilled over the carina. Next, the right main stem bronchus was inspected. The opening to the right upper lobe was also inspected; however, two areas of abnormality were detected. All three segments - anterior, posterior, and apical - were visualized without any obstruction noted.