US 12,458,783 B2
Cerebrospinal fluid shunt
Jeffrey Callister, Deephaven, MN (US); Jacob Jaeger, Deephaven, MN (US); Benjamin Callister, Deephaven, MN (US); Ryan Bauer, Deephaven, MN (US); and Emma Spurgat, Deephaven, MN (US)
Assigned to AZYGOS VASCULAR, INC., Deephaven, MN (US)
Filed by Azygos Vascular, Inc., Deephaven, MN (US)
Filed on Apr. 11, 2025, as Appl. No. 19/177,127.
Claims priority of provisional application 63/633,467, filed on Apr. 12, 2024.
Prior Publication US 2025/0319289 A1, Oct. 16, 2025
Int. Cl. A61M 27/00 (2006.01); A61B 17/34 (2006.01); A61M 25/01 (2006.01); A61M 25/04 (2006.01)
CPC A61M 27/006 (2013.01) [A61M 25/0102 (2013.01); A61M 25/0108 (2013.01); A61M 25/04 (2013.01); A61B 17/3468 (2013.01); A61B 17/3496 (2013.01); A61M 2205/0266 (2013.01); A61M 2210/1003 (2013.01); A61M 2210/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system, comprising:
a stylet configured to puncture a vein wall, tissue in interstitial tissue, and a dura of a patient;
a dilator including a transverse hollow interior region extending to an aperture in a distal region, wherein the dilator is configured to receive the stylet in the hollow interior region and out through the aperture in the distal region, wherein the dilator is configured to pass through tissues punctured by the stylet, including the vein wall, the tissue in the interstitial tissue, and the dura; and
a transdural catheter including a hollow interior region configured to receive the dilator, wherein the transdural catheter is configured to traverse the tissues dilated by the dilator, including the vein wall, the tissue in the interstitial tissue, and the dura, such that a distal tip of the transdural catheter is configured to be located in a thecal sac of the patient such that a distal end of a cerebrospinal fluid (CSF) shunt can be advanced through the transdural catheter from a vein and into the thecal sac.