Intervention instrument for internal widening comprises first stented balloon and second balloon downstream with expandable collecting diaphragm for freed debris collection and capture.

摘要

A catheter (1) carries a first balloon (6) with fitted stent (11) and with a device (15) distally downstream of balloon (6) whose (15) expandable diaphragm catches particulate debris freed by the expansion of the first balloon or stent. The diaphragm then closes round the debris to secure it. A device (2,3,4) so controllably inflates the balloon and collecting device (15) that the diaphragm is expanded before the balloon. The diaphragm should be semi-permeable to let the contrast agent and blood through but block the debris particles and has holes of around 69 micron. A second balloon distally downstream of balloon (6) is responsible for expanding the collecting diaphragm. The guide wire (8) lumen opens into the second distal balloon (14).