Granted Patent B2

US 12,397,129 · App. 17/668,725 · Granted Aug 26, 2025

Inventors: Jeffrey M. Welch (Maple Grove, MN); Gregg Stuart Sutton (Maple Grove, MN)

Assignee: NorMedix, Inc.

A61M25/005A61M25/0045A61M25/0041A61M25/0662

Abstract

Claims (22)

1. An interventional guide catheter for introducing interventional catheters into vasculature, comprising:

a main tubular shaft extending between a proximal end and a distal end having a distal tip, the main tubular shaft including a catheter lumen configured for introducing catheters through the distal tip;

wherein the main tubular shaft includes a sidewall having:

an outer layer;

an inner layer extending around the catheter lumen;

a metal main inner structural layer including metal interposed between the outer and inner layer; and

a braided wire layer surrounding the metal main inner structural layer, the braided wire layer within the outer layer; and

wherein the outer layer, inner layer, metal main inner structural layer and the braided wire layer are a laminate, and the outer layer and inner layer are isolated from each other by layers consisting of one or more of the metal main inner structural layer or the braided wire layer.

2. The interventional guide catheter of claim 1 , wherein the outer layer and inner layer isolated from each other includes the outer layer and inner layer are not fused.

3. The interventional guide catheter of claim 2 , wherein the main inner structural layer includes a helically wound multi-filar wire.

4. The interventional guide catheter of claim 3 , wherein the sidewall has a sidewall thickness including:

an outer layer component thickness of around 0.001 to 0.005 inches;

an inner layer component thickness of around 0.0005 to 0.0007 inches; and

a main inner structural layer component thickness of around 0.0015 to 0.010 inches.

5. The interventional guide catheter of claim 4 , wherein the braided wire layer has a braided wire layer thickness of around 0.0005 to 0.010 inches.

6. The interventional guide catheter of claim 5 , wherein the braided wire layer thickness is around 0.005 to 0.010 inches.

7. The interventional guide catheter of claim 5 , wherein the helically wound multi-filar wire includes distal and proximal edges, and the proximal edges of windings of the helically wound multi-filar wire are engaged with distal edges of proximate windings of the helically wound multi-filar wire.

8. The interventional guide catheter of claim 7 , wherein the distal end includes a curve, and the main inner structural layer is absent from the curve of the distal end.

9. The interventional guide catheter of claim 7 , wherein the distal end includes a curve, and the main inner structural layer is present in the curve of the distal end.

10. The interventional guide catheter of claim 7 , wherein the helically wound multi-filar wire includes a swaged, round, square or rectangular cross-section.

11. The interventional guide catheter of claim 10 , wherein a cross section of the main tubular shaft includes a cross-sectional metallic component of around 40 to 60 percent.

12. The interventional guide catheter of claim 11 , wherein the braided wire layer includes a cross-sectional metallic component of around 5 to 10 percent of the cross section of the main tubular shaft.

Assignments (5)

Continuity (3)

References Cited (181)