US 12,414,869 B2
Stent delivery system and handling device for a stent delivery system
Bryan Murphy, Bray (IE)
Assigned to B. Braun Melsungen AG, Melsungen (DE)
Appl. No. 17/913,955
Filed by B. Braun Melsungen AG, Melsungen (DE)
PCT Filed Mar. 5, 2021, PCT No. PCT/EP2021/055640
§ 371(c)(1), (2) Date Sep. 23, 2022,
PCT Pub. No. WO2021/190902, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20165753 (EP), filed on Mar. 26, 2020.
Prior Publication US 2023/0120768 A1, Apr. 20, 2023
Int. Cl. A61F 2/95 (2013.01); A61F 2/82 (2013.01); A61F 2/966 (2013.01)
CPC A61F 2/9517 (2020.05) [A61F 2/966 (2013.01); A61F 2002/826 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A stent delivery system, comprising:
a handling device having a housing, a thumbwheel mounted in the housing to be rotatable, and a winding spool rotating together with the thumbwheel;
a catheter arrangement having an inner shaft, with a proximal end of the inner shaft fixed on the housing, an outer sheath disposed coaxially to the inner shaft, and having at least one stent which is received radially between the inner shaft and the outer sheath; and
a flexible pull member which, with one end, engages on a proximal end of the outer sheath and, with the other end, is held on the winding spool to be windable, wherein:
for release of the at least one stent, the outer sheath is displaceable relative to the inner shaft in a proximal direction by winding the flexible pull member on the winding spool,
a locking mechanism is provided and in operative connection to the thumbwheel, which locking mechanism causes, upon reaching at least one defined angle of rotation of the thumbwheel, a locking state of a rotational mobility of the thumbwheel and thereby of a proximal displaceability of the outer sheath,
an unlocking mechanism is provided in operative connection to the locking mechanism, the locking state being reversible with the unlocking mechanism,
the locking mechanism includes a rotatably mounted driving gear which is driven by the thumbwheel, a rotatably mounted driven gear which is driven by the driving gear, and a movably mounted locking member on which the driven gear comes into abutment upon reaching the at least one defined angle of rotation of the thumbwheel, thereby producing the locking state, and
the locking member is displaceable relative to the driven gear by the unlocking mechanism for reversing the locking state.