A suture-free coagulation-assisted fixation cardiac patch and preparation method thereof
A heart and patch technology, which is applied in medical science, ligaments, prostheses, etc., can solve the problems of large trauma, weak patch fit, easy slipping, etc., so as to reduce postoperative complications and improve myocardial repair effect , the effect of reducing the difficulty of surgery
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Embodiment 1
[0078] A preparation method of a suture-free coagulation-assisted fixation heart patch, comprising the following steps:
[0079] Raw material preparation:
[0080] Barb microneedle: the diameter of the microneedle is 0.4 mm, and the angle between the bevel tip-shaped bevel and the axial direction of the microneedle is 30°; the cross-sectional shape of the barb is triangular; three groups of barbs are distributed along the longitudinal direction of the microneedle. Barbs, each group of barbs consists of 3 barbs, and the angle between the barbs and the microneedles is 30°; the barb microneedles are made of polylactic acid.
[0081] The force when the barbed microneedles were inserted into the chicken breast after being pulled out from the chicken breast was measured by a universal mechanical testing machine (Instron 5543A), and it was 0.122N.
[0082] (1) Model A is 3D printed, and the model A includes a base, and a plurality of cylinders and spherical recessed structures are f...
Embodiment 2
[0088] A preparation method of a suture-free coagulation-assisted fixation heart patch, comprising the following steps:
[0089] Raw material preparation:
[0090] Barb microneedle: the diameter of the microneedle is 0.5 mm, and the angle between the bevel tip-shaped bevel and the axial direction of the microneedle is 30°; the cross-sectional shape of the barb is triangular; 4 groups of barbs are distributed along the longitudinal direction of the microneedle. Barbs, each group of barbs consists of 3 barbs, and the angle between the barbs and the microneedles is 30°; the barb microneedles are made of polycaprolactone.
[0091] The force when the barbed microneedle was inserted into the chicken breast after being pulled out from the chicken breast was measured by a universal mechanical testing machine (Instron 5543A), and it was 0.200N.
[0092] Porogen: Use a sieve to screen out gelatin microspheres with a diameter of 100 μm.
[0093] (1) By 3D printing model C, the model C ...
Embodiment 3
[0099] A preparation method of a suture-free coagulation-assisted fixation heart patch, comprising the following steps:
[0100] Raw material preparation:
[0101] Barb microneedle: the diameter of the microneedle is 0.4 mm, and the angle between the bevel tip-shaped bevel and the axial direction of the microneedle is 30°; the cross-sectional shape of the barb is square; 5 groups of barbs are distributed along the longitudinal direction of the microneedle. Barbs, each group of barbs is composed of 3 barbs, and the angle between the barbs and the microneedles is 30°; the barb microneedles are made of polypropylene.
[0102] The force when the barbed microneedle was inserted into the chicken breast after being pulled out from the chicken breast was measured by a universal mechanical testing machine (Instron 5543A), and it was 0.220N.
[0103] (1) By 3D printing the model E, the model E includes a base, and several cylinders are formed on one side of the base, and the several cy...
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