Medical delivery systems and apparatus

摘要

A catheter proximal section is preferably formed from a relatively soft part and a relatively rigid part, and includes a proximal terminal end that defines a perimeter of an opening into a lumen of the catheter. The proximal section may further include a feature for interlocking engagement with an accessory tool. An inner surface of each of the relatively soft and rigid parts may be located opposite one another, on either side of the catheter lumen. The relatively soft and rigid parts may be included in a sealing assembly that further includes an attachment feature for removable connection of the assembly to the proximal section catheter.

主权项

1. A delivery system including a catheter and an accessory tool, the catheter including a proximal section, a distal end and a lumen extending along a length of the catheter from the proximal section to the distal end;
the proximal section of the catheter comprising: a proximal terminal end that defines a perimeter of a proximal opening into the lumen and includes an exposed sealing area, the perimeter of the proximal opening of the lumen including a first portion and a second portion, the exposed sealing area forming the first portion of the perimeter of the proximal opening; and a relatively rigid sidewall surrounding the lumen, the relatively rigid sidewall including an external engagement feature located in proximity to the second portion of the perimeter of the proximal opening and on an opposite side of the proximal opening from the exposed sealing area; and the accessory tool comprising a feature configured to interlock with the external engagement feature of the catheter, wherein: the relatively rigid sidewall of the proximal section of the catheter further includes a relatively thin wall section that has a proximal edge forming at least a part of the second portion of the perimeter of the proximal opening of the lumen; the external engagement feature of the relatively rigid sidewall defines a gap that the relatively thin wall section spans and within which the feature of the accessory tool extends when the feature of the tool interlocks with the external engagement feature; and the accessory tool comprises a slitter tool, the slitter tool further comprising a blade that is aligned with the relatively thin wall section, when the feature of the tool interlocks with the external engagement feature.