US 11,857,208 B2
Systems and methods for aspirating from a body lumen
Michi E. Garrison, Sunnyvale, CA (US); and Sieu T. Duong, Sunnyvale, CA (US)
Assigned to Silk Road Medical, Inc., Sunnyvale, CA (US)
Filed by Silk Road Medical, Inc., Sunnyvale, CA (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,962.
Application 17/193,962 is a continuation of application No. 16/547,042, filed on Aug. 21, 2019, granted, now 10,939,929.
Application 16/547,042 is a continuation of application No. 15/628,190, filed on Jun. 20, 2017, granted, now 10,390,847, issued on Aug. 27, 2019.
Application 15/628,190 is a continuation of application No. 14/221,917, filed on Mar. 21, 2014, granted, now 9,693,789, issued on Jul. 4, 2017.
Claims priority of provisional application 61/806,707, filed on Mar. 29, 2013.
Prior Publication US 2021/0290257 A1, Sep. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61M 5/31 (2006.01); A61B 17/22 (2006.01)
CPC A61B 17/22 (2013.01) [A61M 5/3129 (2013.01); A61M 5/3137 (2013.01); A61B 2017/22079 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A device for aspirating fluid from a body lumen, comprising:
an internal syringe barrel member defining a chamber, the syringe barrel having an opening through which fluid can pass;
a plunger movably positioned at least partially within the chamber and including a plunger seal;
an external syringe barrel connected to the plunger, wherein the internal syringe barrel is movably positioned inside the external syringe barrel, wherein the plunger and the external syringe barrel collectively form a body that can move relative to the internal syringe barrel;
first and second finger elements extending outward from the internal syringe barrel;
third and fourth finger elements extending outward from a distal end of the external syringe barrel;
wherein movement of the first and second finger elements relative to the third and fourth finger elements causes relative movement between the plunger seal and the chamber so as to aspirate fluid into the chamber;
a locking mechanism movable between a first state and a second state, wherein the locking mechanism locks a position of the plunger seal relative to chamber when the locking mechanism is in the first state, and the locking mechanism permits relative movement of the plunger seal relative to chamber when the locking mechanism is in the second state.