Conformable balloonless catheter

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.

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.

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.