Urethral stent with long-acting antibacterial and anti-stenosis functions and preparation method thereof
An anti-stenosis and functional technology, applied in other medical devices, dilators, drug devices, etc., can solve the problems of poor antibacterial and anti-stenosis effects, and achieve inhibition of overgrowth, increase of lumen specific surface area, good pressure resistance Effect
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Embodiment 1
[0073] A method for preparing a long-acting antibacterial and anti-stenosis function urethral stent, the specific steps are as follows:
[0074] (1) fabric tube is prepared;
[0075]The yarn is made into a fabric tube by the method of textile forming, wherein the yarn is composed of multiple silk filaments with a denier of 7tex and a medical magnesium wire with a denier of 7tex and a developing function; the textile forming adopts a weaving process, and the machine It is an 8-spindle automatic knitting machine, the knitting structure adopts diamond knitting (1 / 1 interweaving), the knitting speed is 40rpm, the gear ratio is 82 / 21, and the knitting height is 25cm;
[0076] The prepared fabric tube is a tubular fabric, the radial compression modulus of the fabric tube is 0.03MPa, the elastic recovery rate is 74.68%, the circumferential expansion breaking strength is 0.03MPa, and the yarn coverage rate is 67.11%;
[0077] (2) Pretreatment;
[0078] Firstly, at a temperature of 5...
Embodiment 2
[0098] A method for preparing a long-acting antibacterial and anti-stenosis function urethral stent, the specific steps are as follows:
[0099] (1) fabric tube is prepared;
[0100] The yarn is made into a fabric tube by textile molding, wherein the yarn is composed of multiple polylactic acid filaments with a denier of 20tex and a medical tantalum wire with a denier of 20tex and a developing function; the textile molding adopts a knitting process, The structure of knitting adopts weft knitting single jersey;
[0101] The prepared fabric tube is a tubular fabric, the transverse stitch density is 25 rows / 5cm, the longitudinal stitch density is 25 rows / 5cm, the loop length is 5mm, and the total density is 2000 loops / 25cm 2 ; The radial compression modulus of the fabric tube is 1.31MPa, the elastic recovery rate is 87.14%, the circumferential expansion breaking strength is 4.88MPa, and the yarn coverage rate is 75.32%.
[0102] (2) Pretreatment;
[0103] Firstly, at a tempera...
Embodiment 3
[0125] A method for preparing a long-acting antibacterial and anti-stenosis function urethral stent, the specific steps are as follows:
[0126] (1) fabric tube is prepared;
[0127] The yarn is made into a fabric tube by textile molding, wherein the yarn is composed of multiple polydioxanone filaments with a denier of 40tex and a medical silver filament with a developing function of a denier of 40tex; Forming adopts weaving process, and the structure of weaving adopts plain weave;
[0128] The prepared fabric tube is a tubular fabric with a warp density of 100 threads / 10 cm and a weft density of 100 threads / 10 cm; the radial compression modulus of the fabric tube is 2.11 MPa, the elastic recovery rate is 81.57%, and the circumferential expansion The breaking strength is 5.79MPa, and the yarn coverage is 66.67%;
[0129] (2) Pretreatment;
[0130] Firstly, at a temperature of 55°C, wash the fabric tube prepared in step (1) with a concentration of 4wt% oxalic acid solution f...
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