Catheter systems enabling improved aspiration from cerebral arteries
AssigneeMG Stroke Analytics Inc.
InventorMayank Goyal
Life of this patent
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Abstract
A distal entry point (DEP) to brain aspiration (D2BA) catheter for use in an endovascular procedure for gaining access to cervical and cerebral arteries in a brain of a patient and aspirating one or more intracranial clots from the cerebral arteries, comprising a soft distal tip region having a distal length sufficient to extend from a level 1 or level 2 arterial segment of a cerebral artery or equivalent to an upper neck arterial vessel, a stiffness enabling movement through the level 1 or level 2 arterial segment of the cerebral artery, and an outside diameter (OD) of 6F-10F, a proximal region having a stiffness greater than the stiffness of the soft distal tip region, the proximal region having a length sufficient to extend to outside the patient through the DEP.
Claims12
An endovascular method for gaining access to cervical and cerebral arteries, the endovascular method for placing a catheter system within a human vasculature between a distal entry point (DEP) and cerebral arteries and aspirating a cerebral clot in one of the cerebral arteries, the method comprising the steps of:
- a) introducing a catheter system including a D2BA catheter, guide wire (GW) and diagnostic catheter (DC) through a DEP;
- b) advancing the catheter system to an aortic arch;
- c) advancing the GW and DC to a desired cervical artery and manipulating the GW into a desired cervical artery;
- d) advancing the D2BA catheter to a desired carotid artery over the DC and GW;
- e) removing the DC and GW;
- f) introducing an internal support catheter (ISC) having a tapered distal section for supporting a distal end of the D2BA catheter and adapted to facilitate movement of the distal end through tight curves in the cerebral vasculature and an ISC microwire (ISC MW);
- g) advancing the ISC and ISC MW to the cerebral artery with the clot;
- h) advancing the D2BA catheter to a proximal face of the clot and withdrawing the ISC and ISC MW;
- and,
- i) applying suction to the clot through the D2BA catheter;
- j) comparing a pre-determined pressure pulse against a measured response pressure at a suction pump and adjusting subsequent pressure pulses based on the measured response pressure;
- where step i includes applying one or more first pressure pulses through the D2BA catheter to assist in engaging a distal tip of the D2BA catheter against the clot followed by at least one second aspiration pulse to aspirate the clot;
- wherein the step of adjusting subsequent pressure pulses considers pressure response data from a plurality of patients collected and analysed from similar procedures;
- wherein suction is applied via a suction pump operatively connected to the internet and a central computer system and wherein pressure response data from different pumps is received and analysed by the central computer system and wherein pump pressure algorithms are updated via the internet to the different pumps.
A method for gaining access to cervical and cerebral arteries, comprising:
- advancing a catheter system to an aortic arch, the catheter system comprising an aspiration catheter, a guide wire, and a diagnostic catheter;
- advancing the guide wire and the diagnostic catheter to a desired cervical artery;
- advancing the aspiration catheter to a desired carotid artery over the diagnostic catheter and the guide wire;
- removing the diagnostic catheter and the guide wire;
- advancing an integrated support and cooling catheter to a clot within a cerebral artery, the integrated support and cooling catheter comprising a cooling lumen and a tapered distal section;
- advancing the aspiration catheter to the clot and withdrawing the integrated support and cooling catheter;
- aspirating the clot with the aspiration catheter;
- reintroducing the integrated support and cooling catheter to a previous location of the clot after the clot has been aspirated;
- cooling the previous location of the clot by flushing a cooling solution through the integrated support and cooling catheter.
Dependencies are inferred from the claim text.