A steerable element for use in surgery, comprising: an inflatable member and an elongate frame azimuthally surrounding said inflatable member, wherein: said inflatable member is configured to press against said elongate frame on inflation so as to cause a change in the curvature of said elongate frame. A catheter, an insertion system, a medical implant comprising the steerable element, a delivery system comprising the steerable element, and a method of configuring the steerable element for use.
