Abstract: An economical hydrotherapy apparatus is provided for domestic use in conventional bathtubs. The apparatus includes a hydrotherapy chair and a relatively movable aerating pad, molded from plastic, that are placed in a bathtub for use with the seat of the chair at or near the surface of water in the bathtub. The aerating pad is spaced about eight inches below the surface of the water. An air compressor, located outside the bathtub, provides air that is delivered into the water from penetrations in the aerating pad. The introduction of compressed air at a depth of about eight inches creates therapeutic undulations of water against the seat and posterior of the user at the surface of the water.

Abstract: A chair having an open seat includes a hydro pad supported thereunder for creating a therapeutic whirlpool effect. The chair is utilized in a bath for treatment of perineal and perianal illnesses. The hydro pad comprises a shallow, substantially rectangular plenum with a plurality of air injection ports through the upper surface. By an electric motor air is forced through the plenum for creation of the whirlpool effect in the water beneath the chair seat.