RESUMO
In cardiac surgical patients it is a complex challenge to find the ideal balance between anticoagulation and hemostasis. Preoperative anemia and perioperative higher transfusion rates are related to increased morbidity and mortality. Patient blood management (PBM) is an evidence based patient specific individualized protocol used in the perioperative setting in order to reduce perioperative bleeding and transfusion rates and to improve patient outcomes. The three pillars of PBM in cardiac surgery consist of optimization of preoperative erythropoiesis and hemostasis, minimizing blood loss, and improving patient specific physiological reserves. This narrative review focuses on the challenges with special emphasis on PBM in the preoperative phase and intraoperative transfusion management and hemostasis in cardiac surgery patients. It is a "must" that PBM is a collaborative effort between anesthesiologists, surgeons, perfusionists, intensivists and transfusion laboratory teams. This review represents an up to date overview over "PBM in cardiac surgery patients".
Assuntos
Perda Sanguínea Cirúrgica/prevenção & controle , Transfusão de Sangue , Procedimentos Cirúrgicos Cardíacos , Hemostasia , Assistência Perioperatória , HumanosRESUMO
A potential risk in pig-to-human xenotransplantation is the transmission of PERVs to human recipients. Here we show for the first time the inhibition of PERV expression in primary porcine cells by RNA interference using lentiviral vectors. Cells were transduced with lentiviral vectors coding for short hairpin (sh) RNAs directed against PERV. In all primary porcine cells studied and in the porcine kidney cell line PK-15, expression of PERV-mRNA was significantly reduced as measured by real-time PCR. Most importantly, expression of PERV proteins was almost completely suppressed, as shown by Western blot analysis. Thus, lentiviral shRNA vectors could be used to knockdown PERV expression and create transgenic pigs with a reduced risk of PERV transmission during xenotransplantation.
Assuntos
Retrovirus Endógenos/isolamento & purificação , Lentivirus/genética , Animais , Linhagem Celular , Retrovirus Endógenos/genética , Fibroblastos/virologia , Humanos , Interferência de RNA , RNA Mensageiro/genética , RNA Viral/genética , Infecções por Retroviridae/transmissão , Infecções por Retroviridae/veterinária , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Suínos , Proteínas Virais/genéticaRESUMO
This study represents a long-term follow-up of human patients receiving pig islet xenotransplantation. Eighteen patients had been monitored for up to 9 years for potentially xenotic pig viruses: pig endogenous retrovirus, pig cytomegalovirus, pig lymphotropic herpesvirus, and pig circovirus type 2. No evidence of viral infection was found.