The Aesculap Surgical Instruments operates on battery and electrical pneumatic motorline system. They are used for cartilage repairing in joint replacement surgery, ENT and general plastic surgery. Many patients I know who have undergone plastic surgery have told me that surgeons extensively use Aesculap range of surgical equipments for better performance. Another innovative surgical instrument from Aesculap is the Hilan XL, a pneumatic system operating with a high speed. In spite of being small and lightweight, it is smooth and powerful being more effective than the ordinary machine and does not produce too much sound. This instrument is extensively used in neurosurgery.