title: Influence of the ratio between radial artery inner diameter and sheath outer diameter on radial artery flow after transradial coronary intervention.
abstract: To test the feasibility of using guiding catheters equal to or greater than 7 Fr in transradial coronary intervention (TRI), we measured the inner diameter of the radial artery (RA) and its flow using two-dimensional ultrasound and Doppler examinations before and after TRI in 250 Japanese patients. The incidence of severe flow reduction of the RA after TRI was 6.8% on average (7.2%, 4.7%, and 8.3% in patients with 6, 7, and 8 Fr sheaths used, respectively), which increased from 4.0% to 13.0% (P=0.0113) if the ratio of the RA inner diameter/sheath outer diameter was less than 1.0. The frequency of this ratio (> or = 1.0) for 7 and 8 Fr sheaths was 71.5% and 44.9% in male patients and 40.3 and 24.0% in female patients, respectively. We conclude that the use of guiding catheters equal to or greater than 7 Fr in the radial artery is feasible in selected patients.
authors.affiliation: Department of Cardiology, ShonanKamakura General Hospital, Kamakura, Japan. saito@shonankamakura.or.jp
authors.forename: S
authors.initials: S
authors.lastname: Saito
authors.forename: H
authors.initials: H
authors.lastname: Ikei
authors.forename: G
authors.initials: G
authors.lastname: Hosokawa
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015906:Angioplasty, Balloon, Coronary / Q000379:methods*; D006328:Cardiac Catheterization / Q000295:instrumentation*; D003327:Coronary Disease / Q000628:therapy*; D005240:Feasibility Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D017534:Radial Artery / Q000033:anatomy & histology / Q000502:physiology; D012039:Regional Blood Flow; D012680:Sensitivity and Specificity; D015607:Stents; D018608:Ultrasonography, Doppler