Method of producing a surgical implant
AssigneeAnson Medical Limited
InventorsAnthony Walter Anson, Peter William Phillips, John Reidy, Shakeel Qureshi
Life of this patent
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Abstract
A stent for occluding the human ductus arteriosus comprises a length of wire of shape memory effect or superelastic material which is expandable from a relatively straightened state for introduction into the patient to an occluding state wherein the wire defines an occluding anchor part and a spiral anchor part and a straight linking part connecting the two wherein the wire has a series of turns extending over the cross-sectional area of the occluding anchor part.
Claims4
A method of producing a shaped article, comprising the steps of (a) winding a length of shape memory material onto a mandrel to form a series of turns defining a coil region having a longitudinal extent;
- (b) treating the material wound onto the mandrel so as to set therein a memory of the shape of the coil region;
- (c) removing the wound material from the mandrel;
- (d) treating the removed material so as to recover the memorised shape of the coil region;
- (e) changing the length of the coil region;
- and (f) treating the material so as to set therein a memory of the changed shape of the coil region.
Dependencies are inferred from the claim text.