Catheter-stylet assembly for slipover urethral instruments
First Claim
1. A urethral instrument system consisting of a filiform and a catheter stylet for passing a catheter through the urethra and into the bladder, said filiform comprising a thin elongated flexible hollow tube of uniform inner and outer diameter throughout its length having open distal and proximal ends, the proximal end being smoothly contoured, tapered and curved so as to readily pass through the urethra and into the bladder, and said stylet comprising an elongated hollow tube having a uniform inner diameter that is slightly larger than the outer diameter of the filiform, open distal and proximal ends, the proximal end being smoothly contoured and the distal end including means for holding the catheter on the stylet,said urethral instrument system being structured such that after the filiform is passed through the urethra and into the bladder, the stylet inserted within the catheter can be slidably passed coaxially over said filiform thereby passing said catheter through the urethra into the bladder.
0 Assignments
0 Petitions
Accused Products
Abstract
An elongated, hollow filiform having a tapered insertion tip is passed through the urethra to the urinary bladder and functions both as a probe to seek the lumen or opening of the urethra and as a guide so that a rigid, hollow stylet within a Councill catheter or the like can be slidably passed over the filiform into the bladder while the filiform remains in a stationary position within the urethra and the bladder. The stylet and the filiform can then be removed to leave the catheter within the bladder. If the urethra is constricted, a first elongated, hollow dilator can be guided over the filiform to dilate or widen the urethra before the stylet and catheter are introduced. If necessary, the first dilator can be replaced by a second dilator having a larger outer diameter to further dilate the urethra so that the diameter of the urethra will accommodate the Councill catheter containing the hollow rigid stylet.
-
Citations
17 Claims
-
1. A urethral instrument system consisting of a filiform and a catheter stylet for passing a catheter through the urethra and into the bladder, said filiform comprising a thin elongated flexible hollow tube of uniform inner and outer diameter throughout its length having open distal and proximal ends, the proximal end being smoothly contoured, tapered and curved so as to readily pass through the urethra and into the bladder, and said stylet comprising an elongated hollow tube having a uniform inner diameter that is slightly larger than the outer diameter of the filiform, open distal and proximal ends, the proximal end being smoothly contoured and the distal end including means for holding the catheter on the stylet,
said urethral instrument system being structured such that after the filiform is passed through the urethra and into the bladder, the stylet inserted within the catheter can be slidably passed coaxially over said filiform thereby passing said catheter through the urethra into the bladder.
-
11. A urethral instrument system comprising a filiform and a dilator for passing through the urethra and into the bladder, said filiform comprising a thin elongated flexible hollow tube having an open distal end and a smoothly contoured, tapered and curved proximal end which can be readily passed through the urethra and into the bladder, said filiform having an opening in the side thereof near the proximal end for the drainage of fluid to indicate that the filiform has reached the bladder, and said dilator comprising an elongated hollow tube having (a) open distal and proximal ends, the proximal end being smoothly contoured and (b) a uniform inner diameter that is slightly larger than the outer diameter of the filiform,
said urethral instrument being structured such that after the filiform is passed through the urethra and into the bladder said dilator can be slidably passed coaxially over said filiform to dilate the urethra.
-
14. A method for passing a urethral instrument system through the urethra and into the bladder comprising:
-
(a) inserting a contoured proximal end of a thin elongated flexible hollow filiform having substantially uniform inner and outer diameters, an open distal end shaped for easy insertion through the urethra and into the bladder, and an opening in the side thereof near the proximal end through the urethra until the proximal end enters the bladder and fluid drains into the opening, through the filiform and out the open distal end thereby indicating that the filiform has reached the bladder; (b) sliding an elongated hollow dilator having (1) open proximal and distal ends, the proximal end being smoothly contoured and (2) a uniform inner diameter that is slightly larger than the outer diameter of the filiform coaxially over said filiform until the proximal end of the dilator enters the bladder; and (c) pulling the distal end of the filiform which extends beyond the distal end of the dilator to withdraw the filiform from the dilator. - View Dependent Claims (15, 16, 17)
-
Specification