Conformable balloonless catheter
View Patent ↗Indwelling catheter having an upper distal end having a portion that can expand within a bladder type spaces without having to be inflated. An embodiment allows for at least one slit on an upper side of the catheter tube and a head member that when pulled down by a stylette moving inside the catheter causes a bulge wing portion(s) that holds the catheter safely and painlessly within the bladder. Magnetic and electret valves can be included inside the tube of the catheter that can cycle between open and closed positions when activated by normal bladder pressure when urination is desired. The novel catheter tube can naturally conform to an opening and closing urethra during natural bladder drainage. The catheter tube surface can include an anti-microbial layer that is either or both coated and impregnated thereon with either an antibacterial and/or hydrophyllic materials. Sampling ports can be located on both inside catheter tube valves and on an externally attached magnetic valve.
1. An indwelling catheter, comprising:
a catheter tube having an upper end and a bottom end with an expandable portion adjacent to the upper end;
longitudinal means for being inserted into the catheter tube having a top end which can attach to the upper end of the catheter tube, and a lower end adjacent to the bottom end of the catheter tube, wherein pulling on the lower end of the longitudinal means causes the expandable portion of the catheter tube to expand inside of a space;
a head member in the upper end of the catheter tube having a downwardly projecting threaded portion;
a sleeve fixably held inside the catheter below the expandable portion;
means for attaching the upper end of the catheter tube to the sleeve after the upper end is pulled to the sleeve;
a threaded wall on the sleeve for rotatably screwing about the downwardly projecting threaded portion of the head member;
means for supporting the head member in at least one rotatable position relative to the catheter tube; and
a threaded tip end on the longitudinal means for mateably screwing to the threaded portion of the head member.
2. The catheter of claim 1 , wherein the expandable portion includes:
wings which expand outward.
3. The catheter of claim 1 , wherein the catheter tube further comprises:
at least one longitudinal slit adjacent the upper end of the catheter tube.
4. The catheter of claim 1 , wherein the catheter tube further comprises:
an anti-microbial surface, the surface being selected from at least one of: a surface coating and an impregnated material.
5. A passive cycling control for catheters, comprising:
a magnetic valve inside a catheter tube, the magnetic valve having a closed position for obstructing flow through the catheter tube and an open position for allowing flow therethrough, the magnetic valve including a ring having a opening therethrough and a shaft having a head end and a foot end, the shaft for moving within the opening of the ring between a first position where the head end abuts against an upper portion of the ring closing an upper end of the opening and the foot end of the shaft abuts against a lower portion of the ring closing a lower end of the opening, and wherein one of the ring and the foot end contains a magnet; and
non-inflatable holding means for supporting an upper end of the catheter within a bladder, wherein bladder pressure causes the magnetic valve to cycle between the closed position and the open position to replicate natural cycling conditions of drainage of the bladder.
6. The cycling control of claim 5 , further comprising:
an anti-microbial surface on the catheter, the surface being selected from at least one of: a surface coating and an impregnated material.
7. A drainage cycler for use with catheters, comprising in combination:
a catheter tube;
a low pressure-activated valve attached to the catheter tube, wherein pressure applied to the pressure-activated valve allows for the valve to cycle between an open and a closed position by a patient's detrusor muscle, the valve including an electret valve sized to be positioned inside the catheter; and
a self-sealing sampling port adjacent to the valve for allowing samples of fluid to be safely removed while the catheter tube is filled with fluid.
8. The cycler of claim 7 , wherein the magnetic valve includes:
a housing with a connector for being attached to an exposed end of the catheter tube.
9. The cycler of claim 7 , wherein the catheter tube includes:
an anti-microbial surface.
10. A passive cycling control for catheters, comprising:
a magnetic valve inside a catheter tube, the magnetic valve having a closed position for obstructing flow through the catheter tube and an open position for allowing flow therethrough, the magnetic valve including a downwardly narrowing funnel shape having a large top open end which narrows down to a magnetic valve end which opens and closes upon the pressure from the bladder; and
non-inflatable holding means for supporting an upper end of the catheter within a bladder, wherein bladder pressure causes the magnetic valve to cycle between the closed position and the open position to replicate natural cycling conditions of drainage of the bladder.
11. A passive cycling control for catheters, comprising:
an electret valve inside a catheter tube, the electret valve having a closed position for obstructing flow through the catheter tube and an open position for allowing flow therethrough; and
non-inflatable holding means for supporting an upper end of the catheter within a bladder, wherein bladder pressure causes the electret valve to cycle between the closed position and the open position to replicate natural cycling conditions of drainage of the bladder.
12. The cycling control of claim 11 , wherein the electret valve includes:
an downwardly narrowing funnel shape having a large top open end which narrows down to a electret valve end which opens and closes upon pressure from the bladder.