RESUMOIntrodução: A curva de aprendizado é uma das limitações da técnica radial. O estudo teve como objetivo avaliar a influência desse aprendizado nos resultados de procedimentos realizados pelo acesso radial. Métodos: Estudo de coorte prospectivo, com pacientes submetidos a cateterismo cardía-co e alocados no grupo A (intervenções realizadas por operadores com > 500 procedimentos por via radial) e no grupo B (intervenções realizadas por operadores com < 500 procedimentos por via radial). O pulso radial foi avaliado com Doppler antes, imediatamente após e aos sete dias da intervenção. Resultados: O estudo incluiu 58 pacientes no grupo A e 62 no grupo B. A maioria era do sexo feminino (57,5%), com média de idade de 59 + 10,3 anos, e 25% eram diabéticos. A doença arterial coronária foi diagnosticada em igual proporção entre os grupos (43,9% vs. 42,4%; P > 0,99), mas a doença valvar apresentou maior prevalência no grupo A (24,1% vs. 3,2%; P = 0,001). A taxa de crossover para a técnica femoral foi semelhante (1,7% vs. 1,6%; P > 0,99). Os operadores com maior experiência realizaram os procedimentos com menor tempo de punção e de fluoroscopia e com menor tempo total de exame (13,2 + 5,2 minutos vs. 16,3 + 4,8 minutos; P = 0,001). Não ocorreram complicações maiores. Não foram observadas diferenças em relação à presença de hematomas tipo I (12% vs. 3,2%), tipo II (1,7% vs. 1,7%) e tipo III (0 vs. 1,7%). Na avaliação pelo Doppler, o fluxo do pulso e a oclusão da artéria radial foram semelhantes entre os grupos. Conclusões: A curva de aprendizado exerce papel importante em alguns dos desfechos relacionados aos procedimentos pela via de acesso radial. Operadores experientes realizam exames com menor tempo total, de fluoroscopia e de punção. DESCRITORES: Cateterismo cardíaco. Artéria radial. Curva de aprendizado. ABSTRACT Influence of the Learning Curve in Percutaneous Procedures by Transradial ApproachBackground: The learning curve is one of the limitations of the transradial technique. The aim of this study was to evaluate the influence of the learning curve in the outcomes of procedures using the radial approach. Methods: Prospective cohort study in patients undergoing cardiac catheterization allocated to Group A (interventions performed by operators with > 500 procedures by radial approach) and Group B (interventions performed by operators with < 500 procedures by radial approach). Radial pulse was evaluated by Doppler before, immediately after and seven days after the intervention. Results: Fifty-eight patients were included in Group A and 62 in Group B. Most of them were female (57.5%), with mean age of 59 + 10.3 years and 25% were diabetic. Coronary artery disease was diagnosed in equal proportion between groups (43.9% vs. 42.4%; P > 0.99), but valve disease was more prevalent in Group A (24.1% vs. 3.2%; P = 0.001). The crossover rate for the femoral technique was similar (1.7% vs. 1.6%; P > 0.99). The more experienced operators performed the procedures with shorter puncture, fluoroscopy and total procedure time (13...
background: Although the transradial approach has reduced vascular complications, radial artery occlusion is still considered one of its limitations. The aim of this study was to evaluate radial artery patency after transradial cardiac catheterization. Methods: Prospective cohort study of patients undergoing cardiac catheterization using the transradial approach. Procedures were performed with 5 F and 6 F catheters with the administration of 5,000 IU of heparin and 200 μg of nitroglycerin through the radial sheath. Radial artery blood flow was assessed by Doppler before, immediately after bandage removal and 7 days after the procedure. Results: The study included 120 patients of which 42.5% were males, with 59.1 ± 10.6 years of age, 25.8% were diabetic, weighing 77.4 ± 14.2 kg and height of 166 ± 8.1 cm. The number of catheters used was 2.3 ± 0.5 per patient, 55.8% using 6 F sheaths. The duration of the procedure was 14.8 ± 5.2 minutes, the puncture time was 129.7 ± 124.1 seconds, and the fluoroscopy time was 4 ± 2.3 minutes. Radial spasm and crossover to the femoral technique occurred in 20.8% and 1.7% of the procedures, respectively. Significant hematoma was observed in 2.4% of the patients. At 1 week of followup, arterial occlusion was observed in 1.7%, and reduced blood flow in 26.7% of the patients. Conclusions: Radial artery occlusion following diagnostic procedure using the
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