RÉSUMÉ
Objective To study the initial pumping speed of sodium citrate in single plasma exchange with regional citrate anticoagulation(RAC).Methods From January to December 2021,15 patients and 67 times of treatment with local sodium citrate anticoagulation single plasma exchange in the hospital were in-cluded in the study.According to the initial pumping speed of sodium citrate,they were included in the low-speed group(n=33)and the high-speed group(n=34).The transmembrane pressure,filter pressure drop and venous pressure were compared between the two groups at 30 minutes,one hour and two hours after treatment.The free calcium concentration after plasma separator at 15 minutes and one hour after treatment,and the coagulation of plasma separator and extracorporeal circulation pipeline at the end of treatment were compared between the two groups.The concentration of free calcium,blood gas analysis and electrolyte were compared at the beginning of treatment,one hour after treatment and at the end of treatment.Results The free calcium concentration after the filter was monitored at 15 minutes and one hour of treatment in both groups was within the effective range of anticoagulation recommended by the guidelines.There were no lips,fingertip numbness and hand-foot convulsions in the two groups during the treatment,and no bleeding oc-curred after the treatment.There were four cases of hypocalcemia and two cases of alkalosis in the low-speed group,and 13 cases of hypocalcemia and eight cases of alkalosis in the high-speed group.The difference be-tween the two groups was statistically significant(P＜0.05).There were 15 cases of grade Ⅰ coagulation and five cases of grade Ⅱ coagulation in plasma separator and pipeline in the low-speed group,while there were 14 cases of grade Ⅰ coagulation and four cases of grade Ⅱ coagulation in plasma separator and pipeline in the high-speed group.There was no significant difference between the two groups(P＞0.05).Conclusion In plasma exchange treatment,according to the low initial pumping speed,RAC can not only ensure the anticoagulant effect,but also reduce the incidence of complications such as hypocalcemia and alkalosis.