Wai Hsueh,Olin Jay Palmer,Scott Comiso,James B. Ross,Ken Vien,Julio Argentieri,Peter Altman
申请号：
US14501635
公开号：
US20150231368A1
申请日:
2014.09.30
申请国别(地区):
US
年份:
2015
代理人:
摘要：
A needle-injection catheter includes a catheter body having a distal end, a proximal end, a stiff proximal portion, a flexible distal portion, and a delivery lumen extending therethrough. In a first embodiment, a straight injection needle extends coaxially from a distal tip of the flexible portion of the catheter body, and a plurality of penetration limiting elements positioned circumferentially about a base of the straight injection needle and configured to fold radially inwardly against a shaft of the needle when constrained in a tubular lumen and to extend radially outwardly when unconstrained. In a second embodiment, a helical needle extends from the distal tip of the flexible portion of the catheter body. The helical needle has at least one helical delivery lumen connected to receive an injectable substance from the delivery lumen of the catheter body.
