title: The 4-in-5 mother-child technique: 5 Fr transradial coronary intervention for complex lesions using a 4 Fr child catheter.
abstract: Small 5 Fr guiding catheters are now used in percutaneous coronary intervention (PCI). However, when treating severely calcified and/or tortuous complex coronary lesions, the back-up support of a 5 Fr guiding catheter is often insufficient. We previously developed a 4 Fr child catheter (Kiwami ST-01; Terumo Corporation) and proposed a 4 Fr double-coaxial technique ("mother-child" configuration) to facilitate stent implantation in treating complex coronary lesions. In this manuscript, we report 2 cases of 5 Fr transradial coronary intervention in which stent delivery failed with conventional techniques. In these 2 cases, our 4 Fr double-coaxial technique was employed, and stents were successfully delivered to the target lesions. To the best of our knowledge, this is the first report demonstrating the potential of the 4-in-5 technique during 5 Fr PCI.
authors.affiliation: Department of Cardiology and Catheterization Laboratory, Shonan Kamakura General Hospital, Kamakura, Japan.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Tobita
authors.forename: Satoshi
authors.initials: S
authors.lastname: Takeshita
authors.forename: Shigeru
authors.initials: S
authors.lastname: Saito
mesh_terms: D000368:Aged; D062906:Cardiac Catheters / Q000145:classification*; D017023:Coronary Angiography; D023921:Coronary Stenosis / Q000628:therapy*; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D062645:Percutaneous Coronary Intervention / Q000295:instrumentation* / Q000379:methods; D017534:Radial Artery; D015607:Stents; D016896:Treatment Outcome