Bladder Neck Stent Extension for Median Lobe Obstruction
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Solution Overview
Problem
Existing treatments for prostate enlargement, particularly when both lateral and median lobes enlarge, fail to adequately relieve symptoms of Benign Prostatic Hyperplasia (BPH) and Prostatic Bladder Neck Obstruction (BNO) by merely expanding the prostatic urethra, as they do not address the suction effect of the median lobe causing BNO.
Innovation Solution
A stent device with pressure wires that apply radial force to the prostatic urethra and bladder neck, maintaining them unobstructed, and optionally includes anchoring wires to secure the median lobe, preventing it from obstructing the bladder neck.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If existing treatments merely expand the prostatic urethra, then the prostatic urethra is enlarged, but the suction effect of the median lobe causing BNO is not addressed
Solution Approach 1:
The stent device is divided into two distinct functional portions: a prostatic urethra portion with pressure wires for enlarging the prostatic urethra, and a bladder neck portion with anchoring wires for preventing median lobe obstruction. This segmentation allows each portion to address specific aspects of the disease independently, resolving the contradiction between urethra enlargement and bladder neck obstruction relief.
Solution Approach 2:
The stent device performs multiple functions simultaneously: it enlarges the prostatic urethra through radial pressure, anchors the median lobe to prevent suction-induced obstruction, and maintains bladder neck patency. This multi-functionality allows a single device to address both the urethral constriction and the bladder neck obstruction problems that previously required separate treatments.
2Ease of operation
If a stent device is inserted to relieve BPH, then the prostatic urethra is kept open, but the median lobe can still obstruct the bladder neck due to suction effect
Solution Approach 1:
The anchoring wires are positioned to secure the median lobe before the suction effect can cause obstruction. By establishing this preventive anchor in advance, the device proactively counteracts the suction force that would otherwise pull the median lobe into the bladder neck, ensuring reliable bladder neck patency while maintaining ease of urine flow.
3Ease of manufacture
If traditional stents are used, then the procedure is minimally invasive, but the treatment is incomplete as it does not address BNO
Solution Approach 1:
The stent device is designed as a universal treatment tool that simultaneously addresses both BPH and BNO through its dual-function structure. The prostatic urethra portion treats BPH by maintaining urethral patency, while the bladder neck portion treats BNO by anchoring the median lobe, all through a single minimally invasive insertion procedure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The stent device effectively relieves BPH and BNO by maintaining the prostatic urethra open and preventing the bladder neck obstruction, while being minimally invasive and adaptable to patient needs.
Implementation Method 1
A stent device with pressure wires that apply radial force to the prostatic urethra and bladder neck
Implementation Method 2
optionally includes anchoring wires to secure the median lobe, preventing it from obstructing the bladder neck
Data Source
AI summary
It is an object of the disclosed technique to provide methods and systems for a stent device, such as a prostatic urethral implant, for treating prostate enlargement and a constriction of the prostatic urethra while also maintaining the bladder neck and internal urethral sphincter unobstructed.