Sciarra M, Marana E, Cavaliere F, Loffreda C, Schiavello R
Resuscitation. 1983 Aug;10(4):253-7. doi: 10.1016/0300-9572(83)90027-8.
The changes of magnesium in the serum were studied in 20 patients undergoing cardiac valve substitution procedures in extracorporeal circulation. The serum magnesium ions were determined before the onset of the anesthesia, at the beginning and at the end of the extracorporeal circulation, at the end of surgery and during the first post-operative day. A slight magnesium ion deficiency was observed even in the initial serum levels, probably due to the pre-operative diuretic therapy. The hypomagnesemia observed during the bypass was related to haemodilution and urinary losses. A limited increase in magnesemia, probably caused by the diffusion of the ion towards the vascular compartment, was observed at the end of the extracorporeal circulation. A new decrease was found during the post-operative stage, perhaps caused by the action of diuretics, which were administered.
对20例接受体外循环心脏瓣膜置换手术的患者血清镁的变化进行了研究。在麻醉开始前、体外循环开始时和结束时、手术结束时以及术后第一天测定血清镁离子。即使在初始血清水平时也观察到轻微的镁离子缺乏，这可能是由于术前利尿治疗所致。体外循环期间观察到的低镁血症与血液稀释和尿液丢失有关。在体外循环结束时，观察到血镁有一定程度的升高，这可能是由于离子向血管腔扩散所致。在术后阶段发现血镁再次下降，这可能是由于所使用的利尿剂的作用。
