Patent ID: 11957855
Assignee: NEURAVI LIMITED
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 6:
7. A method of manufacture of a balloon guide catheter including: a catheter shaft having an outer surface, a proximal end, and an opposite distal end; the catheter shaft having an inner surface forming a main lumen defined therein extending axially therethrough from the proximal end to the distal end; the main lumen being configured to receive a guidewire therein; the catheter shaft between the inner and outer surfaces having an arc shape inflation lumen defined axially therein arranged semi-encircling the main lumen; the catheter shaft having an inlet vent defined in the outer surface radially outward from the inner surface of the catheter shaft and in fluid communication with the inflation lumen; and the catheter shaft having a first exhaust vent disposed longitudinally through a distal terminating end of the inflation lumen coinciding with a distal terminating end of the main lumen and a second exhaust vent defined radially inward through the inner surface of the catheter shaft in fluid communication between the inflation lumen and the main lumen;
a porous membrane disposed at each of the first exhaust vent within the distal terminating end of the inflation lumen and the second exhaust vent; the porous membrane having a plurality of holes defined therein sized to permit only gas to pass therethrough; and an expandable balloon secured about the outer surface of the catheter shaft proximate the distal end of the catheter shaft and coinciding with the inlet vent; the method comprising the step of:
forming a tubular main liner to form the main lumen axially therethrough; the formed tubular main liner having a region etched with a polymeric strike layer at selected sections of surfaces;
punching a first opening radially through the formed tubular main liner that serves as the second exhaust vent disposed radially inward in fluid communication with the main lumen defined axially therethrough;
providing the porous membrane having a region etched with a polymeric strike layer at selected sections of surfaces of the porous membrane;
positioning the porous membrane to cover the punched second exhaust vent defined in the formed tubular main liner; and
laminating the formed tubular main liner attached together with the porous membrane under an application of heat.