US 12,168,103 B2
Neurosurgical apparatus and method
Steven Streatfield Gill, Bristol (GB)
Assigned to RENISHAW NEURO SOLUTIONS LTD, Charfield (GB); and NEUROCHASE INNOVATIONS LTD
Filed by RENISHAW NEURO SOLUTIONS LTD, Gloucestershire (GB); and XCED LLP, London (GB)
Filed on Oct. 15, 2021, as Appl. No. 17/502,691.
Application 17/502,691 is a continuation of application No. 16/454,637, filed on Jun. 27, 2019, granted, now 11,160,954.
Application 16/454,637 is a continuation of application No. 14/610,185, filed on Jan. 30, 2015, granted, now 10,369,329, issued on Aug. 6, 2019.
Claims priority of application No. 1401552 (GB), filed on Jan. 30, 2014; and application No. 1412941 (GB), filed on Jul. 22, 2014.
Prior Publication US 2022/0032005 A1, Feb. 3, 2022
Int. Cl. A61M 25/00 (2006.01)
CPC A61M 25/0067 (2013.01) [A61M 2210/0693 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for intraparenchymal delivery of a fluid to an elongate structure of a brain of a subject, the method comprising delivering the fluid to the elongate structure by inserting at least one intraparenchymal catheter having at least one step into the brain using a posterior to anterior approach along an insertion axis that is substantially aligned with a long axis of the elongate structure, such that said at least one step is located within said elongate structure and fluid will reflux from a tip of said catheter to said step and deliver more fluid to said elongate structure than a method without said at least one step located within said elongate structure.