Split type blood vessel coating support
A technology of covered stents and blood vessels, which is applied in the field of medical devices, can solve the problems of threatening the life of patients, dissection rupture, bifurcation stent disengagement, etc., and achieve the effects of good controllability, high water absorption rate and stable structure
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Embodiment 1
[0040] In a 25ml round bottom flask, add 2.0g (0.01mol) of polyethylene glycol diacrylate (PEGDA-200) with a molecular weight of 200, 0.144g of acrylic acid (AA) (molar ratio PEGDA-200:AA=5:1), 0.5ml of methanol, magnetically stirred and mixed, then added azobisisobutyronitrile (AIBN) (molar ratio PEGDA-200:AIBN=1:0.8‰), magnetically stirred to dissolve. The round bottom flask was sealed with a rubber stopper, and vacuum-filled with nitrogen was repeated 5 times. Magnetic stirring was carried out at 60°C for 2.5 hours, the reactant was precipitated with tetrahydrofuran and washed with methanol three times, and dried in a vacuum oven at 60°C to obtain a prepolymer.
[0041] The prepolymer, pentaerythritol tetramercaptoacetate (1wt%), and photoinitiator DMPA (2wt‰) were fully dissolved and mixed in 1ml of methanol, and cured by ultraviolet light (365nm) for 1 minute to obtain the stent port covering material. The water absorption rate of the material can reach 300% in 24 hours....
Embodiment 2
[0043] Others are the same as in Example 1, except that the reaction time is changed to 1.5 hours. The 24-hour water absorption rate of the obtained stent port covering material was 400%.
Embodiment 3
[0045] Others are the same as in Example 1, except that polyethylene glycol diacrylate (PEGDA-1000) with a molecular weight of 1000 is used instead. The 24-hour water absorption rate of the obtained stent port covering material was 200%.
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