title: Mother-child technique using a novel 4 Fr inner catheter.
abstract: OBJECTIVE
  The aim of this study was to assess the efficacy of the mother and child technique using a 4 Fr inner catheter in coronary angioplasty following the failure of conventional techniques.
  
  
  RESULTS
  We identified cases in which a 4 Fr inner catheter had been used to facilitate stent delivery following the failure of conventional techniques. Stent delivery using a 4 Fr inner catheter was performed in 30 cases and was successful in 29 cases. Nineteen cases for RCA, six cases for LAD and five cases for LCx were examined. Direct engagement of a 4 Fr inner catheter was accomplished in eight cases. In the remaining patients, deep engagement of a 4 Fr inner catheter was accomplished with the anchor technique and/or distal balloon deflation technique. Proximal stent delivery followed by distal stent deployment was performed in seven cases by using the distal balloon deflation technique in multiple stent deployment. There were no complications related to deep intubation of a 4 Fr inner catheter.
  
  
  CONCLUSIONS
  The use of a 4 Fr inner catheter is safe and highly effective for aiding stent delivery. The anchor technique and/or distal balloon deflation technique could be required for deep engagement of a 4 Fr inner catheter.
authors: Department of Cardiovascular Medicine, Tokyo Medical and Dental University, Tokyo, Japan.
authors: Takashi
authors: T
authors: Ashikaga
authors: Kaoru
authors: K
authors: Sakurai
authors: Yasuhiro
authors: Y
authors: Satoh
authors: Hiroshi
authors: H
authors: Inagaki
authors: Shunji
authors: S
authors: Yoshikawa
authors: Ken
authors: K
authors: Kurihara
authors: Kenzo
authors: K
authors: Hirao
authors: Mitsuaki
authors: M
authors: Isobe
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary / Q000295:instrumentation / Q000379:methods*; D015331:Cohort Studies; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000000981:diagnostic imaging / Q000628:therapy*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D015607:Stents; D062666:Vascular Access Devices