logistics?后勤？嵌顿？

Struvite stones: 

a. Treating and preventing urinary tract infections reduces struvite stone formation and recurrence. 

b. Difficult to efficiently dissolve and rarely done due to treatment side effects and logistics. 

c. Urease inhibitor treatment by acetohydroxamic acid is considered for poor surgical candidates or those unable to fully clear stones. This agent is poorly tolerated and infrequently used in contemporary practice. 

d. Surgical interventions usually are required to remove struvite stones. Percutaneous nephrolithotomy (PCNL) and/or ureteroscopy are usually needed to adequately treat struvite stones as they facilitate active stone removal. Shock wave lithotripsy (SWL) can be used, but this does not actively remove the stones and may potentiate further UTIs.

磷酸镁铵结晶结石：

a.治疗和预防尿路感染可减少磷酸镁铵结晶结石的形成和复发。

b.由于治疗副作用和嵌顿问题，难以将其有效溶解也很少这么做。

c.对于手术效果不佳或不能完全清除结石的患者，可以考虑用乙酰氧肟酸之类的脲酶抑制剂治疗。这种药剂耐受性差，在当代的医学实践中不常使用。

d.通常需要手术干预才能取出磷酸镁铵结晶结石。通常需要经皮肾镜取石术（Percutaneous nephrolithotomy，PCNL）和/或输尿管镜检查来充分治疗磷酸镁铵结晶结石，因为它们有助于活动性结石的取出。也可以使用体外冲击波碎石术（Shock wave lithotripsy，SWL），但这不能有效地清除结石，可能会加强进一步的尿路感染。

 logistics : 来自法语l''art logistique,安营扎寨的艺术，词源同lodge,安顿，小屋，-ics,学说。原指**车马粮草的安排，即现代意义上的后勤，物流。部分学者认为来自希腊语logos,说，辩理，安排，词源同logic.