Sterile field clot capture module for use in thrombectomy system
A clot capture module can include a housing, a chamber inside the housing, a window, and a filter. The window permits visual inspection of a clot inside the chamber. The clot can access the chamber via an incoming flow path configured to direct blood from an aspiration catheter to an upstream surface of the filter. An aspiration control valve can block the flow of incoming aspirated blood until actuated to permit inflow of aspirated blood. An outgoing flow path can direct blood from a downstream surface of the filter to a remote vacuum canister.
1. A clot capture module for use in a thrombectomy system, the clot capture module comprising:
a housing;
a clot capture chamber in the housing;
a window in the housing to permit visual inspection of the clot capture chamber;
a filter in the clot capture chamber, the filter being visible through the window, the filter having an upstream surface and a downstream surface;
an incoming flow path configured to direct incoming blood from an aspiration catheter against the upstream surface of the filter;
a normally closed aspiration control valve in the incoming flow path, the aspiration control valve being positioned in the housing and configured to block flow of incoming aspirated blood until actuated to permit inflow of aspirated blood;
an outgoing flow path configured to direct blood from a downstream side of the filter to a remote vacuum canister; and
a normally closed vent being positioned in the housing and operable to permit air to be drawn into the clot capture chamber.
2. A clot capture module as in claim 1 , wherein the aspiration control valve comprises collapsible tubing.
3. A clot capture module as in claim 1 , wherein the upstream surface of the filter is visible through the window.
4. A clot capture module as in claim 1 , wherein the upstream surface of the filter is substantially planar.
5. A clot capture module as in claim 1 , wherein the upstream surface of the filter is convex.
6. A clot capture module as in claim 5 , wherein the filter comprises a blood permeable membrane, and wherein the upstream surface of the filter is on a radially outwardly facing surface of the blood permeable membrane.
7. A clot capture module as in claim 6 , wherein the blood permeable membrane at least partially encloses a filtered blood chamber which is in fluid communication with the outgoing flow path.
8. A clot capture module as in claim 1 , wherein the window comprises a transparent tubular portion of the housing.
9. A clot capture module as in claim 1 , further comprising an aspiration actuator, configured to control the aspiration control valve.
10. A clot capture module as in claim 9 , wherein the aspiration actuator comprises a rocker switch.
11. A clot capture module as in claim 1 in combination with a vacuum line leading to an aspiration pump and a canister, wherein the clot capture module is configured to reside within a sterile field while the aspiration pump and canister reside outside of the sterile field.
12. A clot capture module as in claim 11 , wherein the vacuum line is at least about 30 inches in length.
13. A clot capture module as in claim 11 , further comprising a selector valve in the vacuum line.
14. A clot capture module as in claim 11 , wherein the aspiration pump comprises a syringe.
15. A clot capture module as in claim 1 , comprising a proximal housing, and a distal housing separated by a transparent tubular side wall.
16. A clot capture module as in claim 15 , wherein at least one of the proximal housing and distal housing is releasably connected to the transparent tubular side wall.
17. A clot capture module as in claim 1 , further comprising a coating to inhibit blood accumulation on an interior surface of the window.