ObjectiveTo analyze the safety and efficacy of vacuum-assisted venous drainage (VAVD) in cardiac surgery under cardiopulmonary bypass (CPB).MethodsA total of 180 patients from 3 centers between November 17, 2017 and October 1, 2018 were enrolled and randomly assigned to a VAVD group and a gravity drainage (GD) group by 1∶1 ratio. During the open-heart surgery under CPB, the VAVD group completely relied on VAVD, and the GD group used conventional GD. The primary endpoint was arterial flow before CPB, 15 min after aortic cross-clamping and rewarming to 36 °C of nasopharyngeal temperature. The secondary endpoints included hematocrit, hemoglobin concentration, blood product transfusion, etc. The safety endpoint was free hemoglobin concentration, etc.ResultsThe full analysis set contained 175 patients, 87 in the VAVD group and 88 in the GD group. Patients in the VAVD group were aged 52.8±12.0 years, and males accounted for 55.2%; patients in the GD group were aged 51.4±12.1 years, and males accounted for 59.1%. The demographic characteristics between the two groups were not statistically different. Compared to the GD group, the VAVD group could provide comparable arterial flow in CPB [average of 3 time points, 2.37±0.22 L/(min·m2) vs. 2.41±0.25 L/(min·m2), P=0.271], while not elevating free hemoglobin concentration.ConclusionVAVD can provide enough venous drainage, while not elevating free hemoglobin concentration or damaging blood.
ObjectiveTo evaluate the safety and efficacy of peripheral cannulation for cardiopulmonary bypass (CPB) in patients with reoperation of congenital heart disease. MethodsThe perioperative data of patients with congenital heart disease who underwent reoperation in Fuwai Hospital from 2019 to 2020 were retrospectively collected. They were divided into two groups according to the cannulation methods: a central group and a peripheral group. The prognosis of the patients was analyzed. Results A total of 80 patients were collected, including 43 patients in the central group, and 37 pateints in the peripheral group. In the central group, the median age was 18 (14, 32) years, and 21 patients were male. The median age of the peripheral group was 16 (10, 27 ) years, and 18 patients were male. The CPB time in the peripheral group was 201 (164, 230) min, which was longer than that in the central group [143 (97, 188 ) min, P＜0.001]. The lactate after CPB in the peripheral group was statistically higher than that in the central group [2 (1, 2 ) mmol/L vs. 1 (1, 1) mmol/L, P=0.002]. The dosage of albumin use during CPB in the peripheral group was statistically higher than that in the central group [10 (0, 20) g vs. 0 (0, 0) g, P=0.004]. There was no statistical difference in the postoperative dosage of red blood cells use [0 (0, 2) U vs. 0 (0, 0) U, P=0.117], mechanical ventilation time [14 (11, 19) h vs. 13 (10, 15) h, P=0.296], ICU stay time [43 (23, 80) h vs. 40 (20, 67) h, P=0.237] or postoperative hospital stay time [10 (7, 12) d vs. 8 (7, 10) d, P=778] between the two groups. ConclusionIt’s safe and efficient to establish CPB through peripheral cannulation in patients with complex congenital heart disease undergoing reoperation.
ObjectiveTo explore the safety and feasibility of the establishment method and management strategy of prolonged support model with veno-venous extracorporeal membrane oxygenation (V-V ECMO) under dual lumen cannula (DLC) in conscious sheep.MethodsThree adult male sheep were selected. An Avalon Elite DLC was inserted into the superior vena cava, right atrium, and inferior vena cava through the right jugular vein and was connected with centrifugal pump and oxygenator to establish the extracorporeal membrane oxygenation circuit. All the 3 sheep were transferred into the monitoring cage after operation and were ambulatory after anesthesia recovery. Hemodynamic parameters and extracorporeal membrane oxygenation performance were measured every day.ResultsAll three sheep survived to the end of the experiment (7 days). In the whole process of the experiment, the basic vital signs of the experimental sheep were stable, and no serious bleeding or thrombotic events occurred. During the experiment, hemoglobin concentration and platelet count were relatively stable, plasma free hemoglobin was maintained at a low level, extracorporeal membrane oxygenation flow rate was stable, and oxygenation performance of oxygenator was good.ConclusionProlonged V-V ECMO model in conscious sheep under DLC is feasible and stable.