Hydraulic Stool and Chair | Hospital Hydraulic Stool | Ofiice Hydraulic Stool. Tychemed Hydraulic stool and chair is available with cushioned seat with adjustable height by the hydraulic system. You can tell us your requirements by click on “place an order” in the nav menu. The hydraulic stool is also available with backrest such as a hydraulic chair. Surgeons Stool with / Without Backrest specifications This specification is variable because we manufacture according to your requirements. Social profile.