title: Clinical and biomaterial evaluation of a new condensed dual-function extracorporeal circuit in reoperation for coronary artery bypass surgery.
abstract: OBJECTIVE
  This prospective, randomized study compared the clinical performance of three types of circuits: a newly introduced, fully-coated, interchangeable open-closed circuit with a dual configuration (hard shell with a bypass shunt), reduced length, and reduced prime of less than 800 cc (CondECC); a completely coated circuit (ECC); and a similar uncoated, open circuit with standard length and prime (CONT).
  
  
  METHODS
  75 patients undergoing reoperation for coronary revascularization were randomly allocated into three groups (N=25): Group 1: CondECC with shortened tubing, components and an open-closed configuration of low priming volume with a centrifugal pump and a shunt which bypassed the reservoir for closed configuration; Group 2: ECC with a roller pump and hard-shell reservoir; Group 3: CONT. Blood samples for CBC, inflammatory mediators [Interleukin-2 (IL-2), Complement-3a (C3a)] and flow cytometry (CD11b/CD18) were collected after induction (T1) and heparin administration (T2), 15 min after cardiopulmonary bypass (CPB) (T3), before cessation of CPB (T4), 15 min after reversal (T5), and the first postoperative day (T6).
  
  
  RESULTS
  Leukocyte counts demonstrated significant increases at T4, T5 in CONT but remained stable in ECC and CondECC (p<0.05). Platelets were preserved better at T4, T5 in both ECC and CondECC study groups (p<0.05). IL-2 and C3a levels were significantly lower at T3, T4, T5 in CondECC and T4, T5 in ECC (p<0.05). Blood protein adsorption analysis demonstrated increased amount of microalbumin on CONT fibers (p<0.05).
  
  
  CONCLUSIONS
  The CondECC is a flexible, dual-function, open/closed configuration system that was easy to use, safe and achieved better biocompatibility when compared to coated and uncoated conventional circuits.
authors.affiliation: Department of Cardiovascular Surgery, University of Kirikkale, Kirikkale - Turkey. sgunaydin@isnet.net.tr
authors.forename: Serdar
authors.initials: S
authors.lastname: Gunaydin
authors.forename: Kevin
authors.initials: K
authors.lastname: McCusker
authors.forename: Venkataramana
authors.initials: V
authors.lastname: Vijay
mesh_terms: D000179:Acrylates / Q000737:chemistry*; D000327:Adsorption; D015415:Biomarkers / Q000097:blood; D001777:Blood Coagulation; D002315:Cardiopulmonary Bypass / Q000009:adverse effects / Q000295:instrumentation*; D020099:Coated Materials, Biocompatible; D003176:Complement C3 / Q000378:metabolism; D001026:Coronary Artery Bypass; D004797:Enzyme-Linked Immunosorbent Assay; D004867:Equipment Design; D004906:Erythrocyte Count; D005434:Flow Cytometry; D006400:Hematocrit; D006454:Hemoglobins / Q000378:metabolism; D006461:Hemolysis; D006801:Humans; D007249:Inflammation / Q000097:blood / Q000209:etiology / Q000517:prevention & control*; D018836:Inflammation Mediators / Q000097:blood; D007376:Interleukin-2 / Q000097:blood; D007958:Leukocyte Count; D010976:Platelet Count; D011108:Polymers / Q000737:chemistry*; D011446:Prospective Studies; D012086:Reoperation; D012709:Serum Albumin / Q000378:metabolism; D013053:Spectrophotometry; D013916:Thrombelastography; D013997:Time Factors; D016896:Treatment Outcome; D020107:Troponin T / Q000097:blood
chemical_list: D000179:Acrylates; D015415:Biomarkers; C038245:C3 protein, human; D020099:Coated Materials, Biocompatible; D003176:Complement C3; D006454:Hemoglobins; C508594:IL2 protein, human; D018836:Inflammation Mediators; D007376:Interleukin-2; D011108:Polymers; D012709:Serum Albumin; D020107:Troponin T; C413485:poly(2-methoxyethylacrylate)