FSAP-inhibitor complexes and nucleosomes in plasma of patients undergoing a transhiatal esophagectomy. FSAP-AP and FSAP-C1-inh complexes and nucleosomes were measured in plasma from 20 patients undergoing esophageal resection with proximal gastrectomy, performed by a transhiatal approach without thoracotomy. Blood was sampled preoperatively (Day 0) and on days 1, 3, 5, 7, 10 after surgery and six weeks postoperatively. FSAP-inhibitor complexes were expressed as percentage of the amount FSAP-inhibitor complexes present at day 0. The absolute values at Day 0 were 0.51 AU/ml (range 0.03 to 4.46) for FSAP-AP and 0.06 AU/ml (0.01 to 0.40) for FSAP-C1-inh complexes. Nucleosomes were expressed as AU/ml. Results are given as mean ± SEM.