title: Superior vena cava resection in thoracic malignancies: does prosthetic replacement pose a higher risk?
abstract: BACKGROUND
  After superior vena cava (SVC) resection, the need for reconstruction varies among tangential resection, pericardial patch repair and prosthetic replacement. Patients undergoing complete prosthetic replacement often require a different surgical approach, intra-operative SVC cross-clamping and anticoagulation when polytetrafluoroethylene (PTFE) prosthesis is used. This study tested the hypothesis that PTFE replacement may interfere with perioperative outcome.
  
  
  METHODS
  Clinical records from a series of 72 consecutive SVC resections performed between 1998 and 2008 were reviewed. Complications were classed into five categories: surgical, respiratory, cardiac, SVC system thrombosis and nerve damage. Each category of postoperative complications was considered as an outcome variable in a univariate analysis testing 12 covariates as risk factors. Covariates considered clinically relevant or statistically significant were included in the multivariate model.
  
  
  RESULTS
  During the considered period, 28 patients underwent total SVC resection with PTFE prosthetic replacement and 44 patients underwent SVC repair by the use of direct running suture (nine patients), stapling (30 patients) or autologous pericardial patch (five patients). Two patients died postoperatively (2.8%). Major complications were mainly due to respiratory failure, which occurred in nine cases (acute respiratory failure in five cases, recurrent atelectasis in three cases, acute respiratory distress syndrome (ARDS) in one case). In terms of overall mortality and morbidity, univariate analysis did not confirm a detrimental effect of SVC replacement as compared with SVC repair, as major postoperative complications occurred in similar proportion in both groups (respectively, 6/28, 21.4% vs 7/44, 15.9%, p=0.54). No other risk factor was identified by univariate analysis.
  
  
  CONCLUSIONS
  Complete prosthetic replacement does not increase overall postoperative morbidity in patients undergoing SVC resection and can be safely performed when other reconstruction techniques preclude sufficient tumour-free resection margin or compromise adequate blood flow.
authors: Thoracic Surgery Department, Istituto Nazionale dei Tumori, Via Venezian 1, 20100 Milan, Italy. francesco.leo@istitutotumori.mi.it
authors: Francesco
authors: F
authors: Leo
authors: Roberto
authors: R
authors: Bellini
authors: Barbara
authors: B
authors: Conti
authors: Vincenzo
authors: V
authors: Delledonne
authors: Luca
authors: L
authors: Tavecchio
authors: Ugo
authors: U
authors: Pastorino
mesh_terms: D001807:Blood Vessel Prosthesis; D019917:Blood Vessel Prosthesis Implantation / Q000009:adverse effects* / Q000379:methods; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology / Q000601:surgery*; D008297:Male; D008479:Mediastinal Neoplasms / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D018579:Patient Selection; D011138:Polytetrafluoroethylene; D011183:Postoperative Complications; D012120:Respiration Disorders / Q000209:etiology; D017792:Surgical Stapling; D013537:Sutures; D016896:Treatment Outcome; D014683:Vena Cava, Superior / Q000473:pathology / Q000601:surgery*
chemical_list: D011138:Polytetrafluoroethylene