Features of Midmark Articulated Knee Crutches for Ritter 222 Examination Table: Knee crutches provide leg support during extended procedures where fatigue is a factor or when the patient lacks sufficient leg strength or control. Articulating Knee Crutches use a unique ball-socket design allowing a maximum range of adjustment for optimum knee and leg support. With one of the largest catalogs of medical, surgical and diagnostic supplies available online, Medex Supply can accommodate your facility's needs for Exam Room Furniture. Tables Accessories & Parts can be found in our extensive online collection of products from globally recognized and trusted brands, including MidMark. An excellent option to consider is the Articulated Knee Crutches for Ritter 222 Examination Table.