title: Patency of Saphenous Vein Grafts Using the PAS-Port System During Coronary Artery Bypass Surgery.
abstract: BACKGROUND
  Several proximal anastomosis devices have been developed to shorten the time required for a proximal anastomosis and to avoid aortic cross-/side-clamping during coronary artery bypass grafting. This study retrospectively examined the patency of saphenous vein grafts (SVGs) using the PAS-Port System (Cardia Inc, Redwood City, CA).
  
  
  METHODS
  From 2004 to 2014, 451 patients underwent coronary artery bypass graft operations requiring at least 1 proximal anastomosis using a PAS-Port device. A total of 802 PAS-Port devices were used, and 95.0% (762 of 802) were implanted successfully. Among the successfully implanted anastomoses, 76.8% (585 of 762) were evaluated using coronary angiography or multidimensional computed tomography, or both. The evaluations were performed between postoperative days 4 and 3,182 (mean, 319 ± 624 days). The early (1 to 365 days) and the midterm to long-term (more than 366 days) occlusion rates were examined. A complete postoperative clinical course was recorded for 70.7% of the patients.
  
  
  RESULTS
  Overall, 93.8% (549 of 585) of the device-dependent SVGs were patent. The patency rates of device-dependent SVGs that were 1, 2, 3, 4, 5, 6, 7, and 8 years old were 90.1% ± 1.8%, 87.1% ± 2.3%, 86.1% ± 2.5%, 82.9% ± 3.3%, 80.6% ± 3.9%, 77.2% ± 5.0%, 77.2% ± 5.0%, and 70.2% ± 8.1%, respectively. The longest follow-up period was 3,182 days (8.7 years). The occlusion rate for device-dependent SVGs tended to decrease as the number of patients accumulated.
  
  
  CONCLUSIONS
  The PAS-Port system provided acceptable SVG patency and clinical outcome for the early and midterm to long-term. There may be a learning curve for the use of PAS-Port device that affects the device-dependent SVG patency.
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan. Electronic address: kub@ks.kyorin-u.ac.jp.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kubota
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan.
authors.forename: Hidehito
authors.initials: H
authors.lastname: Endo
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan.
authors.forename: Hikaru
authors.initials: H
authors.lastname: Ishii
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Tsuchiya
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Takahashi
authors.affiliation: Department of Cardiovascular Surgery, Kyorin University, Tokyo, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Inaba
authors.affiliation: Department of Cardiovascular Surgery, Tsukuba University, Tsukuba, Japan.
authors.forename: Mio
authors.initials: M
authors.lastname: Noma
authors.affiliation: Department of Cardiovascular Surgery, Tsukuba Memorial Hospital, Tsukuba, Japan.
authors.forename: Akihiro
authors.initials: A
authors.lastname: Yoshimoto
authors.affiliation: Department of Cardiology, Kyorin University, Tokyo, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Higuchi
authors.affiliation: Department of Cardiology, Kyorin University, Tokyo, Japan.
authors.forename: Hideyasu
authors.initials: H
authors.lastname: Kohshoh
authors.affiliation: Department of Cardiology, Kyorin University, Tokyo, Japan.
authors.forename: Seiichi
authors.initials: S
authors.lastname: Taniai
authors.affiliation: Department of Cardiology, Kyorin University, Tokyo, Japan.
authors.forename: Haruhisa
authors.initials: H
authors.lastname: Ishiguro
authors.affiliation: Department of Cardiology, Kyorin University, Tokyo, Japan.
authors.forename: Hideaki
authors.initials: H
authors.lastname: Yoshino
authors.affiliation: Department of Cardiovascular Surgery, Jiseikai Nomura Hospital, Tokyo, Japan.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Sudo
mesh_terms: D000368:Aged; D017023:Coronary Angiography; D001026:Coronary Artery Bypass / Q000379:methods*; D003324:Coronary Artery Disease / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D004867:Equipment Design; D005260:Female; D005500:Follow-Up Studies; D006083:Graft Occlusion, Vascular / Q000175:diagnosis / Q000453:epidemiology / Q000503:physiopathology*; D006801:Humans; D015994:Incidence; D007564:Japan / Q000453:epidemiology; D008297:Male; D016343:Monitoring, Intraoperative / Q000295:instrumentation*; D061330:Multidetector Computed Tomography; D012189:Retrospective Studies; D012307:Risk Factors; D012501:Saphenous Vein / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000637:transplantation; D015996:Survival Rate / Q000639:trends; D014654:Vascular Patency