Stability and Agreement of a Microtransducer and an Air-Filled Balloon Esophageal Catheter in the Monitoring of Esophageal Pressure

Autor(es)

Augusto, Renan Maloni ^[1] ; Pereira Albuquerque, Andre Luis ^[1] ; Jaeger, Thomas ^[1] ; Ribeiro de Carvalho, Carlos Roberto ^[1] ; Caruso, Pedro ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med, Hosp Clin, Heart Inst InCor, Pulm Div, Sao Paulo, Brazil. Caruso, Pedro, AC Camargo Canc Ctr, Intens Care Unit, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Respiratory Care; v. 62, n. 2, p. 215-221, FEB 2017.
• Citações Web of Science: 1

Resumo

BACKGROUND: The use of esophageal catheters with microtransducer promises advantages over traditional catheters with air-filled balloons. However, performance comparisons between these 2 types of catheters are scarce and incomplete. METHODS: A catheter with a 9.5-cm air-filled balloon at the distal tip and a catheter with a microtransducer mounted within a flexible silicone rubber were tested in vitro and in vivo. In vitro, the response times of both catheters were compared, and the drift of the baseline pressure of the microtransducer catheter was evaluated over a 6-h period. In vivo, 11 healthy volunteers had both catheters inserted, and the drift of the baseline esophageal pressure was measured over a 3-h period. Also, the correlation and agreement of the baseline and changes in the esophageal pressure of both catheters were evaluated. RESULTS: In vitro, the microtransducer catheter had a response time significantly higher (262 x 114 Hz, P < .01) and a good pressure stability, with a mean baseline pressure drift of 1.4 cm H2O. In vivo, both catheters presented a small and similar baseline esophageal pressure drift (P = 0.08). For measurements of baseline and changes in esophageal pressure, the correlation and agreement between the catheters were poor, with a large bias between them. CONCLUSIONS: The catheter with the microtransducer had a small baseline pressure drift, similar to the air-filled balloon catheter. The low agreement between the catheters does not allow the microtransducer catheter to be used as a surrogate for the traditional air-filled balloon catheter. (AU)

• Processo FAPESP: 13/02874-8 - Análise comparativa entre cateter com sistema de microtransdutor de pressão e cateter convencional com balão
• Beneficiário: Renan Maloni Augusto
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica