A Kidney Tray or emesis basin is a shallow basin with a kidney-shaped base and sloping walls used in medical and surgical wards to receive soiled dressings and other medical waste. is used in surgical procedures for carrying small instruments, soiled dressings, bandages, dressings, and other medical wastes. The kidney-shaped design of the kidney trays gave them their name. Kidney Tray shape enables it to be taken close to the patient body to collect the falling debris or fluids.