Computational simulation and comparison of prothrombin complex concentrate dosing schemes for warfarin reversal in cardiac surgery

Background: Prothrombin complex concentrate (PCC) is increasingly used for acute warfarin reversal. We hypothesized that computational modeling of thrombin generation (TG) could be used to optimize the timing and dose of PCC during hemodilution induced by cardiopulmonary bypass (CPB). Methods: Thrombin generation patterns were modeled in anticoagulated patients (n = 59) using a published computational model. Four dosing schemes were evaluated including single full dose (median, 41.2 IU/kg) of PCC before or after CPB, ½-dose before and after CPB, or 1/3-dose before CPB plus 2/3-dose after CPB. Hemodilution was modeled as 40 or 60 % dilution of factors from baseline. The lag time (s) of TG, and peak thrombin level (nM) were evaluated. Results: Prolonged lag time, and reduced peak TG were due to low vitamin K-dependent (VKD) factors, and pre-CPB PCC dose-dependently restored TG to near-normal or normal range. After 40 % dilution, TG parameters were similar among 4 regimens at the end of therapy. The recovery of VKD factors was less when PCC was given before CPB after 60 % dilution, but TG parameters were considered hemostatically effective (\u3e200 nM) with any regimen. Withholding the full dose of PCC until post-CPB resulted in severely depressed TG peak (median, 47 nM) after 60 % dilution, and some supra-normal TG peaks after treatment. Conclusions: Pre-CPB administration of full or divided doses of PCC prevents extremely low TG peak during surgery, and maintains hemostatic TG peaks in both 40 and 60 % hemodilution models. Although PCC’s hemostatic activity appears to be highest using the full dose after CPB, hypercoagulability may develop in some cases

Recommendations on RBC Transfusions for Critically Ill Children With Nonhemorrhagic Shock From the Pediatric Critical Care Transfusion and Anemia Expertise Initiative

OBJECTIVES: To present the recommendations and supporting literature for RBC transfusions in critically ill children with nonhemorrhagic shock developed by the Pediatric Critical Care Transfusion and Anemia Expertise Initiative. DESIGN: Consensus conference series of international, multidisciplinary experts in RBC transfusion management of critically ill children. METHODS: The panel of 38 experts developed evidence-based, and when evidence was lacking, expert-based clinical recommendations as well as research priorities for RBC transfusions in critically ill children. The nonhemorrhagic shock subgroup included five experts. Electronic searches were conducted using PubMed, EMBASE, and Cochrane Library databases from 1980 to May 2017. Agreement was obtained using the Research and Development/UCLA Appropriateness Method. Results were summarized using the Grading of Recommendations Assessment, Development, and Evaluation method. RESULTS: Transfusion and Anemia Expertise Initiative Consensus Conference experts developed and voted on a total of four clinical and four research recommendations focused on RBC transfusion in the critically ill child with nonhemorrhagic shock. All recommendations reached agreement ( \u3e 80%). Of the four clinical recommendations, three were based on consensus panel expertise, whereas one was based on weak pediatric evidence. In hemodynamically stabilized critically ill children with a diagnosis of severe sepsis or septic shock, we recommend not administering a RBC transfusion if the hemoglobin concentration is greater than or equal to 7 g/dL. Future studies are needed to determine optimum transfusion thresholds for critically ill children with nonhemorrhagic shock undergoing acute resuscitation. CONCLUSIONS: The Transfusion and Anemia Expertise Initiative Consensus Conference developed pediatric-specific clinical and research recommendations regarding RBC transfusion in the critically ill child with nonhemorrhagic shock. Although agreement among experts was strong, available pediatric evidence was scant-revealing significant gaps in the existing literature

Considerations for Pediatric Heart Programs During COVID-19: Recommendations From the Congenital Cardiac Anesthesia Society.

The coronavirus disease 2019 (COVID-19) pandemic has impacted congenital cardiac surgical programs with significant reduction in case load, implementation of patient triage strategies, and development of personal protective equipment (PPE) guidelines. This document summarizes current status and implications of COVID-19 in congenital cardiac surgery outlining recommendations from the Congenital Cardiac Anesthesia Society (CCAS). [...

Considerations for Pediatric Heart Programs During COVID-19: Recommendations From the Congenital Cardiac Anesthesia Society

The coronavirus disease 2019 (COVID-19) pandemic has impacted congenital cardiac surgical programs with significant reduction in case load, implementation of patient triage strategies, and development of personal protective equipment (PPE) guidelines. This document summarizes current status and implications of COVID-19 in congenital cardiac surgery outlining recommendations from the Congenital Cardiac Anesthesia Society (CCAS). [...

Consensus Recommendations for RBC Transfusion Practice in Critically Ill Children From the Pediatric Critical Care Transfusion and Anemia Expertise Initiative

Objectives: To date, there are no published guidelines to direct RBC transfusion decision-making specifically for critically ill children. We present the recommendations from the Pediatric Critical Care Transfusion and Anemia Expertise Initiative. Design: Consensus conference series of multidisciplinary, international experts in RBC transfusion management of critically ill children. Setting: Not applicable. Intervention: None. Subjects: Children with, or children at risk for, critical illness who receive or are at risk for receiving a RBC transfusion. Methods: A panel of 38 content and four methodology experts met over the course of 2 years to develop evidence-based, and when evidence lacking, expert consensus-based recommendations regarding decision-making for RBC transfusion management and research priorities for transfusion in critically ill children. The experts focused on nine specific populations of critically ill children: general, respiratory failure, nonhemorrhagic shock, nonlife-threatening bleeding or hemorrhagic shock, acute brain injury, acquired/congenital heart disease, sickle cell/oncology/transplant, extracorporeal membrane oxygenation/ventricular assist/ renal replacement support, and alternative processing. Data to formulate evidence-based and expert consensus recommendations were selected based on searches of PubMed, EMBASE, and Cochrane Library from 1980 to May 2017. Agreement was obtained using the Research and Development/UCLA Appropriateness Method. Results were summarized using the Grading of Recommendations Assessment, Development, and Evaluation method. Measurements and Results: The Transfusion and Anemia Expertise Initiative consensus conference developed and reached consensus on a total of 102 recommendations (57 clinical [20 evidence based, 37 expert consensus], 45 research recommendations). All final recommendations met agreement, defined a priori as greater than 80%. A decision tree to aid clinicians was created based on the clinical recommendations. Conclusions: The Transfusion and Anemia Expertise Initiative recommendations provide important clinical guidance and applicable tools to avoid unnecessary RBC transfusions. Research recommendations identify areas of focus for future investigation to improve outcomes and safety for RBC transfusion