建立自體動靜脈廔管的過程中，可藉由置入動靜脈廔管支架縮短靜脈成熟化所需時間並提高成功機率，而生物可降解鎂合金具有良好的生物相容性和機械性能，適合作為動靜脈廔管支架的材料。生物可降解金屬支架大多使用短脈衝雷射或超短脈衝雷射進行加工，通常藉由使用短脈衝雷射或超短脈衝雷射獲得更佳的切割邊緣品質。
本研究以奈秒脈衝雷射及掃瞄振鏡進行鎂鋁合金動靜脈廔管支架加工實驗，利用多道次雷射加工製程改善支架的邊緣品質和表面形貌。加工支架結構前，先進行多道次雷射加工實驗，並藉由固定平均功率和脈衝距離，使用不同的脈衝能量及加工次數切割鎂鋁合金板材
，探討其對切割品質的影響，得出最佳的雷射加工參數並應用於支架結構加工。為了準確分析雷射切割品質，提出一套完整的切割品質分析方式，使用掃描式電子顯微鏡、雷射掃描共軛焦顯微鏡等多種檢測分析儀器對熔渣量、切口大小及切面品質三個方面進行分析。實驗結果顯示藉由最佳的雷射加工參數(平均功率18 W、脈衝寬度 30 nanoseconds、脈衝頻率85 kHz、切割速度85 mm/s及脈衝距離0.001 mm)及加工次數20次可以有效減少熔渣量及改善切面表面粗糙度，並且提高支架結構尺寸精度。

During the construction of arteriovenous fistula, the time required to mature is shortened and the success rate is increased by the placement of arteriovenous fistula stent. The biodegradable magnesium alloy is suitable to be used as the material of arteriovenous fistula stent due to good biocompatibility and mechanical property. Most biodegradable metal stents are fabricated by short pulse laser or ultrashort pulse laser, which are usually used to obtain better cutting edge quality.
In this study, a nanosecond pulsed laser and a galvano-mirror scanner were used for machining experiment of arteriovenous fistula stent, and the edge quality and surface topography of stent structure were improved by multi-pass laser cutting process. A multi-pass laser cutting experiment was carried out on first. By fixing the average power and pulse distance, different pulse energy and processing times were used to cut the magnesium aluminum alloy sheet. The influence of the laser processing parameters on cutting quality was discussed, and the optimal laser processing parameters were obtained and applied to the fabrication of the stent structure. In order to accurately analyze the laser cutting quality, a complete cutting quality analysis method was proposed. Scanning electron microscope, laser scanning confocal microscope and other analysis instruments were used to analyze the dross quantity, kerf size and edge quality. The experimental results show that the laser processing parameters (average power 18W, pulse width 30nanoseconds, pulse repetition rate 85kHz, cutting speed 85mm/s and pulse distance 0.001mm) and 20 processing times can effectively reduce the quantity of dross, improve the surface roughness of the section and promote the size precision of the stent structure.

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