Journal of cardiothoracic and vascular anesthesia最新文献

Objectives: To determine protamine administration increases pulmonary artery pressures (PAPs) in patients undergoing unifocalization or pulmonary artery reconstruction surgeries.

Design: Retrospective database study.

Setting: A large pediatric heart center within an academic quaternary care facility.

Participants: All patients undergoing pulmonary artery reconstruction or a unifocalization procedure identifiable within the data warehouse.

Interventions: We collected data from Stanford University's data repository, formatted it, and analyzed it using RStudio (v 2023.06.1+524).

Measurements and main results: Our primary outcome is the change in PAP after the administration of protamine. Secondary outcomes include changes in the mean arterial pressure, the ratio of systolic pulmonary artery to systemic artery pressure, right-sided filling pressure, and left atrial pressure. After a protamine bolus, we found a difference in PAP (Friedman χ² = 49.46; p < 0.001). When compared with 2 minutes before its administration, the PAP was higher at 2 minutes (29.00 mmHg versus 25.00 mmHg; p < 0.001), 5 minutes (30.00 mmHg versus 25.00 mmHg; p < 0.001) and 10 minutes (31 mmHg versus 25 mmHg; p < 0.001). When coadministered with calcium, there was also a significant increase in PAP (Friedman χ² = 28.11; p < 0.001), with a higher PAP 10 minutes after calcium administration when compared with 2 minutes before (32 mmHg versus 26 mmHg; p < 0.001).

Conclusions: Protamine administration led to a small increase in PAP after separation from cardiopulmonary bypass in patients undergoing pulmonary artery reconstruction or unifocalization surgeries. Calcium coadministration did not lead to a greater increase in PAP.

Introduction: Spinal cord infarction (SCI) or ischemia is a rare but devastating complication of venoarterial extracorporeal membrane oxygenation (VA ECMO). The natural course and outcomes are poorly studied.

Methods: We completed a literature review on ischemic spinal cord injury in patients on VA ECMO and analyzed the published case reports and case series with individual patient characteristics. We also added 3 previously unpublished cases from our own experience.

Results: The final sample included 30 adult patients on VA ECMO for cardiogenic shock secondary to various etiologies. The mean age was 47.7 ± 17.8 years with equal distribution between men and woman. The total duration on ECMO ranged from 3 to 47 days with a median of 10 days. In all patients, ECMO was placed peripherally via an arterial cannula in the femoral artery. All 30 patients developed either paraplegia (27/90%) or weakness (3/10%) of both lower extremities. Magnetic resonance imaging of the spine was consistent with infarction in 88.5% and ischemia in the rest. On follow-up, there were no cases of complete recovery. Partial recovery with significant limitations of mobility was noted in half of them. The remaining half had no signs of neurological recovery. Survival to discharge was reported in 24 cases. Of these cases, 17/70.8% survived and 7/29.2% died.

Conclusion: Spinal infarction/ischemia on VA ECMO typically presents with paraplegia of lower extremities with low potential for even partial recovery. Because no treatment is currently available, the efforts should be focused on prevention. Several strategies have been proposed, but they need further testing under controlled settings.