A copper-containing intrauterine device
An intrauterine device and IUD technology, which is applied to female contraceptives and other directions, can solve problems such as low conversion rate of divalent copper ions, and achieve the effects of uniform surface energy, simple method and light burst release degree.
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specific Embodiment 1
[0036] The ultra-fine crystal copper tube T-shaped intrauterine device of the present invention is composed of a mixture support 1 of high pressure polyethylene and barium sulfate and an ultrafine crystal copper tube 2 (such as Figure 8 ), where the total area of ultra-fine grained copper tubes is 220mm 2 . Soak the ultra-fine-grained copper tube T-shaped intrauterine device in the simulated uterine cavity fluid at 37°C for 150 days, and the release rate curve of copper ions is as follows: image 3 shown. At the initial stage of immersion, 220mm 2 The ultra-fine-grained copper tube showed a certain burst release of copper ions, but the burst release amount was from 119.35→19.37μg / day, and the burst release time was the first 15 days of immersion, which is comparable to that of the existing coarse-grained copper uterus with the same area. Compared with the IUD, the burst release time (20~30d) was shortened, and the burst release amount (263.62→36.37μg / day) was reduced. A...
specific Embodiment 2
[0038] The non-support Gini fixed intrauterine device of the present invention is made up of the ultra-fine-grained copper rod 4 that the central axis has aperture by medical operation thread 3 (such as Figure 9 ), where the total area of ultra-fine grained copper rods is 300mm 2 . The stent-free Gini fixed IUD was soaked in the simulated uterine cavity fluid at 37°C for 150 days, and the release rate curve of copper ions was as follows: image 3 shown. The increase in the area of the ultra-fine-grained copper material did not significantly increase the copper ion burst release of the IUD. The copper ion burst release completed in the first 15 days changed from 125.79 to 20.75 μg / day, and the copper ion release after long-term immersion was stable. The average release rate was 3.1 μg / day. Compared with the burst release amount (328.89→39.01μg / day), burst release time (about 30d) and long-term copper ion release rate (about 1.54μg / day) of the coarse-grained copper IUD w...
specific Embodiment 3
[0039] The specific steps of the platelet adhesion test are as follows:
[0040] 1) Collect fresh healthy human blood for anticoagulation to make ACD whole blood, centrifuge for 15min, and the centrifuge speed is 2000rpm;
[0041] 2) Remove the platelet-rich plasma in the upper layer after centrifugation, soak the sample in it, and place it in a constant temperature water bath at 37°C for 1 hour;
[0042] 3) Take out the sample, rinse it with normal saline, and then fix the platelets adhering to the surface of the sample with 2.5% glutaraldehyde solution for 1 h;
[0043] 4) The samples were dehydrated step by step in ethanol solutions with concentrations of 30%, 50%, 70%, 90% and 100%, respectively, and the dehydration time of each stage was 15 minutes;
[0044] 5) dealcoholize step by step with isovaleraldehyde acetate whose concentrations are respectively 30%, 50%, 70%, 90% and 100%, and the dealcoholization time of each stage is also 15 minutes;
[0045] After the sample...
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