Shape memory lacrimal passage stent and preparation method

• Main Authors: YUAN HUIPING, WANG QI, LENG JINGSONG, ZHANG FENGHUA, DENG YONGDIE, YANG BINBIN
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2020
• Subjects: BANDAGES, DRESSINGS OR ABSORBENT PADS; CHEMISTRY; COMPOSITIONS BASED THEREON; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; FILTERS IMPLANTABLE INTO BLOOD VESSELS; FIRST-AID KITS; FOMENTATION; HUMAN NECESSITIES; HYGIENE; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; PROSTHESES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR PROTECTION OF EYES OR EARS

The invention provides a shape memory lacrimal passage stent and a preparation method; the shape memory lacrimal passage stent is made of a degradable shape memory polyurethane material, and the shapememory lacrimal passage stent is of a reticular three-dimensional structure; the temporary shape of the shape memory lacrimal passage stent is probe-shaped, and the initial shape of the shape memorylacrimal passage stent is matched with the shape of a lacrimal passage; and the shape memory lacrimal passage stent in the temporary shape is suitable for expanding to the initial shape automaticallyunder the action of the body temperature of a human body. The shape memory lacrimal passage stent has a shape memory effect, the diameter of the stent can be reduced through shaping before implantation, the stent is in a probe shape, pain caused to a patient during implantation can be reduced, smooth implantation operation is guaranteed, and after the stent reaches an affected part of a human body, the shape of the stent is