Plasma transfusion in liver transplantation: a randomized, double-blind, multicenter clinical comparison of three virally secured plasmas.

BACKGROUND: The clinical equivalence of plasma treated to reduce pathogen transmission and untreated plasma has not been extensively studied. A clinical trial was conducted in liver transplant recipients to compare the efficacy of three plasmas. STUDY DESIGN AND METHODS: A randomized, equivalence, blinded trial was performed in four French liver transplantation centers. The three studied (fresh-frozen) plasmas were quarantine (Q-FFP), methylene blue (MB-FFP), and solvent/detergent (S/D-FFP) plasmas. The primary outcome was the volume of plasma transfused during transplantation. Secondary outcomes included intraoperative blood loss, hemostasis variables corrections, and adverse events. RESULTS: One-hundred patients were randomly assigned in the MB-FFP, 96 in the S/D-FFP, and 97 in the Q-FFP groups, respectively. The median volumes of plasma transfused were 2254, 1905, and 1798 mL with MB-FFP, S/D-FFP, and Q-FFP, respectively. The three plasmas were not equivalent. MB-FFP was not equivalent to the two other plasmas, but S/D-FFP and Q-FFP were equivalent. The median numbers of transfused plasma units were 10, 10, and 8 units with MB-FFP, S/D-FFP, and Q-FFP, respectively. Adjustment on bleeding risk factors diminished the difference between groups: the excess plasma volume transfused with MB-FFP compared to Q-FFP was reduced from 24% to 14%. Blood loss and coagulation factors corrections were not significantly different between the three arms. CONCLUSION: Compared to both Q-FFP and S/D-FFP, use of MB-FFP was associated with a moderate increase in volume transfused, partly explained by a difference in unit volume and bleeding risk factors. Q-FFP was associated with fewer units transfused than either S/D-FFP or MB-FFP.

Immediate neuroendocrine signaling after partial hepatectomy through acute portal hyperpressure and cholestasis.

BACKGROUND & AIMS: Early neuroendocrine pathways contribute to liver regeneration after partial hepatectomy (PH). We investigated one of these pathways involving acute cholestasis, immediate portal hyperpressure, and arginine vasopressin (AVP) secretion. METHODS: Surgical procedure (PH, Portal vein stenosis (PVS), bile duct ligation (BDL), spinal cord lesion (SCL)) and treatments (capsaicin, bile acids (BA), oleanolic acid (OA)) were performed on rats and/or wild type or TGR5 (GPBAR1) knock-out mice. In these models, the activation of AVP-secreting supraoptic nuclei (SON) was analyzed, as well as plasma BA, AVP, and portal vein pressure (PVP). Plasma BA, AVP, and PVP were also determined in human living donors for liver transplantation. RESULTS: Acute cholestasis (mimicked by BDL or BA injection) as well as portal hyperpressure (mimicked by PVS) independently activated SON and AVP secretion. BA accumulated in the brain after PH or BDL, and TGR5 was expressed in SON. SON activation was mimicked by the TGR5 agonist OA and inhibited in TGR5 KO mice after BDL. An afferent nerve pathway also contributed to post-PH AVP secretion, as capsaicin treatment or SCL resulted in a weaker SON activation after PH. CONCLUSIONS: After PH in rodents, acute cholestasis and portal hypertension, via the nervous and endocrine routes, stimulate the secretion of AVP that may protect the liver against shear stress and bile acids overload. Data in living donors suggest that this pathway may also operate in humans.

[Liver transplantation for intrahepatic Rendu-Osler-Weber's disease: the Paul Brousse hospital experience]. / Transplantation hépatique pour maladie de Rendu-Osler-Weber.

UNLABELLED: Nine centers have reported 15 cases of liver transplantation for Rendu-Osler-Weber's disease with liver involvement. Six cases are reported to analyse the specific technical and hemodynamical aspects. PATIENTS AND METHODS: Five women and 1 man were transplanted for Rendu-Osler-Weber's disease. The clinical presentation was biliary disease in 3 cases, portal hypertension in 2 cases, cardiac failure in 1 case. Systemic hemodynamics were assessed at the beginning and at the end of the transplantation procedure. RESULTS: The procedure lasted from 11 to 15 hours (median=13 hours and 15 minutes). Blood transfusion during the procedure varied from 16 to 88 blood units (median=59 blood units). Six patients had hyperkinetic syndrome at the beginning of the procedure. At the end of transplantation, mean arterial pressure significantly increased (from 66 +/- 2 to 72 +/- 6 mmHg, p<0.05), whereas cardiac output (from 9.2 +/- 3.0 à 5.7 +/- 0.5 L/mn, p<0.05) significantly decreased. Two patients died at D2 and D11 and 4 are alive 3 to 7.5 years (median=4 years 9 months) after transplantation with a normal liver function and without any cardiac symptoms. CONCLUSION: Liver transplantation for Rendu-Osler-Weber's disease is a difficult procedure. When successful, liver transplantation is curative of both the liver disease and the hyperkinetic state.

In situ hypothermic perfusion of the liver versus standard total vascular exclusion for complex liver resection.

SUMMARY BACKGROUND DATA: We compare the results of liver resection performed under in situ hypothermic perfusion versus standard total vascular exclusion (TVE) of the liver <60 minutes and > or =60 minutes in terms of liver tolerance, liver and renal functions, postoperative morbidity, and mortality. The safe duration of TVE is still debated. Promising results have been reported following TVE associated with hypothermic perfusion of the liver with durations of up to several hours. The 2 techniques have not been compared so far. METHODS: The study population includes 69 consecutive liver resections under TVE <60 minutes (group TVE<60', 33 patients), > or =60 minutes (group TVE> or =60', 16 patients), and in situ hypothermic perfusion (group TVEHYOPOTH, 20 patients). Liver tolerance (peaks of transaminases), liver and kidney function (peak of bilirubin, minimum prothrombin time, and peak of creatinine), morbidity, and in-hospital mortality were compared within the 3 groups. RESULTS: The postoperative peaks of aspartate aminotransferase (IU/L) and alanine aminotransferase (IU/L) were significantly lower (P[r] < 0.05) in group TVE HYPOTH (450 +/- 298 IU/L and 390 +/- 391 IU/L) compared with the groups TVE<60' (1000 +/- 808; 853 +/- 743) and TVE> or =60' (1519 +/- 962; 1033 +/- 861). In the group TVEHYPOTH, the peaks of bilirubin (micromol/L) (84 +/- 31), creatinine (micromol/L) (75 +/- 22), and the number of complications per patient (1.2 +/- 0.9) were comparable to those of the group TVE<60' (80 +/- 111; 109 +/- 77; and 0.8 +/- 1.1 respectively) and significantly lower to those of the group TVE> or =60' (196 +/- 173; 176 +/- 176, and 2.6 +/- 1.8). In-hospital mortality rates were 1 in 33, 2 in 16, and 0 in 20 for the groups TVE<60', TVE> or =60', and TVEHYOPOTH, respectively, and were comparable. On multivariate analysis, the size of the tumor, portal vein embolization, and a planned vascular reconstruction were significantly predictive of TVE > or =60 minutes. CONCLUSIONS: Compared with standard TVE of any duration, hypothermic perfusion of the liver is associated with a better tolerance to ischemia. In addition, compared with TVE > or =60 minutes, it is associated with better postoperative liver and renal functions and a lower morbidity. Predictive factors for TVE > or =60 minutes may help to indicate hypothermic perfusion of the liver.