Engineering:Commode chair

From HandWiki

A commode chair, known in British English simply as a commode, is a type of chair used by someone who needs help going to the toilet due to illness, injury or disability. A commode chair sometimes has wheels to allow easy transport to the bathroom or shower. Most commode chairs have a removable pail and flip-back armrests.

Historically, similar pieces of equipment were the close stool and the chamber pot.