title: The novel 4.5F CoKatte catheter for stent delivery facilitation in complex coronary artery lesions.
abstract: BACKGROUND
  The mother and child technique with a deep-seated 4F Kiwami catheter has been reported to be effective for delivering stents to complex lesions.
  
  
  OBJECTIVE
  To assess the feasibility and efficacy of a novel 4.5F child catheter for deep insertion and stent deployment into the distal coronary artery for the treatment of complex lesions.
  
  
  METHODS
  We retrospectively evaluated 51 consecutive patients, who underwent percutaneous coronary intervention between January 2011 and December 2013, using a 4.5F CoKatte catheter after stent delivery failure using the conventional procedures. We evaluated the procedure success, need for an additional anchor balloon technique, and complications related to the deep insertion.
  
  
  RESULTS
  Stent delivery to the intended lesion was successful in all cases. For advancement and subsequent deep intubation of the catheter, 42 lesions required the additional anchor balloon technique. No complications, including proximal dissection, air embolism, and severe ischemia, were observed in relation to the deep insertion of the catheter.
  
  
  CONCLUSIONS
  Percutaneous coronary intervention with the novel 4.5F catheter is a safe and effective method, which can facilitate stent delivery to a complex coronary lesion.
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan. Electronic address: a-takahashi@wine.ocn.ne.jp.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Takahashi
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan.
authors.forename: Norimasa
authors.initials: N
authors.lastname: Taniguchi
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamada
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan.
authors.forename: Yukio
authors.initials: Y
authors.lastname: Mizuguchi
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Hata
authors.affiliation: Department of Cardiology, Sakurakai Takahashi Hospital, 5-18-1 Oikecho, Sumaku, Kobe, Hyogo 654-0026, Japan.
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Nakajima
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D057785:Catheters; D017023:Coronary Angiography / Q000379:methods; D003324:Coronary Artery Disease / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention / Q000295:instrumentation*; D012189:Retrospective Studies; D015607:Stents; D016896:Treatment Outcome
keywords: Coronary artery disease; New device; Stenting technique