Figure 4-18 shows the passing curve of Zn-Cu stent and 316L SS stent. The two sets of stents use the same wall thickness, pattern design, crimping processing parameters and delivery system, so the push curves of the two can be compared to reflect the different situations of the two when they pass through the human blood vessels. In Figure 4-18, the smaller the pushing force, the easier it is for the stent system to pass through curved blood vessels. The stent system enters a smaller turning radius after traveling about 130 mm, and the pushing force begins to increase significantly; the 316L SS stent has a pushing force greater than 1 N in most of its strokes after the travel distance exceeds 130 mm; the Zn-Cu stent is only traveling When the distance reaches 160 mm, it is temporarily greater than 1 N, which shows that the resistance to passing through the blood vessel model is relatively small. The peak thrust of the Zn-Cu stent during the passage through the blood vessel model is 1.21±0.09 N, and the peak thrust of the 316L SS stent during the passage through the blood vessel model is 1.73±0.11 N, and the peak thrust when passing through the blood vessel model is the latter's 69.9%, indicating that the lower yield strength of Zn-Cu material compared to stainless steel also has a positive effect on the Zn-Cu stent.
