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Coronary stent and over-the-wire catheter exchange using standard length guidewires: Jet exchange (JEX) practice and theory by Andrew J. Feiring; Lars E. Olson is a Medicine article available to read on EtoBox.

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The practice and theoretical principles of hydraulic exchange of over-the-wire (OTW) stent and PTCA catheters are described. Seventy-eight Palmaz-Schatz coronary stent delivery systems (PS-SDS), 8 Cook Flex-stents, and 247 assorted OTW catheters were delivered and extracted over standard length coronary guidewires using Jet Exchange (JEX). JEX was performed by pressurizing the wire lumen of coronary stent catheters to 18-20 atm and PTCA catheters to 15 atm. Extraction and insertion times were measured in the last 10 PS-SDS and PTCA procedures. Mechanical analysis of JEX was performed for PS-SDS and a representative OTW PTCA catheter by solving the Navier Stokes equation for annular flow with changing geometry. The force/mass relationship, extraction time, average velocity, net force on the guidewire, and drag force on the guidewire were determined for varying pressures, catheter masses, and extraction wire lumen fluids. JEX was successful in 75/78 (96%) of coronary stents and in 243/247 (98%) of the PTCA catheter exchanges. After catheter removal, reinsertion of another OTW catheter was successful in 324/325 (99%) attempts. The mean force on the guidewire at 15 and 20 atm ranged fr

Who reads Coronary stent and over-the-wire catheter exchange using standard length guidewires: Jet exchange (JEX) practice and theory?

Author

Andrew J. Feiring; Lars E. Olson

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0098-6569)

Published

1997

Language

EN

Field

Medicine (Health Sciences)