US 9,789,284 B2 · Urinary catheter assembly and method

Abstract

A urinary catheter is configured to avoid sliding contact between the outer surface of a catheter tube and the urethra wall. A flexible tubular membrane extends through the catheter tube and has a proximal end secured to an anchor outside the urethra as the catheter tube moves into the urethra, pulling the membrane through the proximal end of the tube so it inverts and covers the outer surface of the tube. Alternatively, a catheter tube of flexible material has a proximal end secured to the anchor, and the catheter tube turns inside out as it is inserted, forming a double wall reflected tube with a proximal reflection point. The sterile interior surface of the membrane or tube becomes the external surface facing the urethral wall as the catheter is deployed, and this external surface maintains static contact with the urethral wall as the catheter is advanced or retracted.

Claims12

Dependent claims

A urinary catheter assembly, comprising:

a catheter tube having an outer surface, a proximal end and a distal end, and a sterile inner lumen;
an anchor which is located at least partially outside a urethra during catheterization;
a flexible inner portion disposed between the outer surface of the catheter tube and the inner lumen and having a sterile inner surface facing the sterile inner lumen and a proximal end secured to the anchor, wherein the flexible inner portion having a sterile inner surface is an integral part of the catheter tube and wherein the proximal end of the catheter tube is secured to the anchor and the catheter tube is configured to fold back on itself to form a double-walled tube with a rounded reflection point at the proximal end of the double-walled tube when the catheter tube is inserted through the urethra;
whereby the sterile inner surface of the flexible inner portion of the catheter tube is inverted and faces the urethra as the catheter tube is inserted through the urethra.

1 more element

Dependencies are inferred from the claim text.

Urinary catheter assembly and method

Life of this patent

Urinary catheter assembly and method

Life of this patent

Abstract

Claims12