title: Feasibility and safety of 7F sheathless guiding catheter during transradial coronary intervention.
abstract: OBJECTIVE
  The aim of our study is to assess the feasibility, safety, and rate of radial artery occlusion (RAO) using 7F sheathless guiding catheter in a large population undergoing transradial intervention (TRI).
  
  
  BACKGROUND
  There is a frequent need for large bore guiding catheter to perform complex coronary interventions. Hydrophilic sheathless guiding catheters are not available in the US, therefore, we present the results of a multicenter study using the modified sheathless technique and readily available catheters.
  
  
  METHODS
  Between December 2010 and February 2011, 116 consecutive patients from four tertiary US centers who underwent TRI using 7F sheathless guiding catheter were included in this study.
  
  
  RESULTS
  In our study of 116 patients with 123 coronary lesions, 57 stenoses (49%) were complex interventions, which included patients with acute coronary syndromes, chronic total occlusion (CTO), bifurcation stenting, calcified lesions, left main artery, and saphenous venous graft interventions. Overall procedural success rate was 95%. At 7-day, there were six patients (5%) with RAO, of which two of the six had severe radial artery spasm during the procedure. At 30-day, the overall persistent RAO was only detected in three patients (2.5%), as three patients had return of antegrade radial artery flow.
  
  
  CONCLUSIONS
  In our multicenter study of 116 consecutive patients, using 7F sheathless guiding catheter to perform TRI is associated with a high procedural success (95%) and a low 30-day RAO rate (2.5%).
authors.affiliation: Division of Cardiology, Beth Israel Medical Center, New York, New York 10013, USA. Kwancardio@aol.com
authors.forename: Tak W
authors.initials: TW
authors.lastname: Kwan
authors.forename: Sanjay
authors.initials: S
authors.lastname: Cherukuri
authors.forename: Yili
authors.initials: Y
authors.lastname: Huang
authors.forename: Samir
authors.initials: S
authors.lastname: Pancholy
authors.forename: Ramesh
authors.initials: R
authors.lastname: Daggubati
authors.forename: Michael
authors.initials: M
authors.lastname: Liou
authors.forename: John
authors.initials: J
authors.lastname: Coppola
authors.forename: Shigeru
authors.initials: S
authors.lastname: Saito
mesh_terms: D000368:Aged; D001157:Arterial Occlusive Diseases / Q000209:etiology; D006328:Cardiac Catheterization / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D062906:Cardiac Catheters; D003327:Coronary Disease / Q000628:therapy*; D004867:Equipment Design; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D061214:Patient Safety; D062645:Percutaneous Coronary Intervention / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods; D017534:Radial Artery; D012042:Registries; D018570:Risk Assessment; D012307:Risk Factors; D013035:Spasm / Q000209:etiology; D013997:Time Factors; D016896:Treatment Outcome; D014481:United States