Indwelling Urinary Catheter Negative Pressure Therapy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current treatments for venous congestion and fluid overload in the urinary tract, such as diuretics, are ineffective in improving renal function for patients with cardiorenal syndrome, leading to inadequate urine output and sodium regulation.
Innovation Solution
A negative pressure therapy system using a urinary catheter with an inflow and outflow member, where the inflow member is deployed in the renal pelvis with drainage holes to induce negative pressure, drawing fluid from the kidney and expelling it through the outflow member into the ureter or bladder, enhancing urine output and sodium excretion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If diuretics are used to treat venous congestion and fluid overload, then fluid removal is attempted, but renal function is not improved and urine output remains inadequate
Solution Approach 1:
Instead of using diuretics to promote fluid excretion through pharmacological action, the invention inverts the approach by directly applying negative pressure to the renal pelvis to mechanically extract fluid. The catheter delivers negative pressure directly to the renal pelvis, creating a pressure gradient that draws fluid from the kidney through the collecting system into the bladder, bypassing the need for renal excretion mechanisms to be functional.
Solution Approach 2:
The invention introduces a catheter as an intermediary device between the negative pressure source and the renal pelvis. This catheter system acts as a mediator that directly connects the pressure source to the urinary tract, allowing mechanical fluid removal without relying on the kidney's natural filtration and excretion functions.
2Productivity
If negative pressure is applied to the urinary tract, then fluid removal is enhanced, but device complexity increases
Solution Approach 1:
The catheter system is segmented into distinct functional portions: a renal pelvis portion with drainage holes for fluid entry, an intermediate portion for structural support and positioning, and a bladder portion for fluid collection. This segmentation allows each portion to be optimized for its specific function while maintaining overall system effectiveness.
Solution Approach 2:
The catheter serves multiple functions simultaneously: it delivers negative pressure to the renal pelvis, provides structural support to maintain the pressure gradient, acts as a conduit for fluid removal, and can be positioned to drain into the bladder or ureter. This multi-functionality reduces the need for separate devices.
3Duration of action of stationary object
If an indwelling catheter is used for negative pressure therapy, then treatment duration can be extended, but risk of infection and complications increases
Solution Approach 1:
The catheter is designed with a retention portion that uses the body's own anatomical structures (renal pelvis geometry, ureteral opening) to secure the device in place without requiring additional fixation mechanisms. This self-retaining design reduces the need for external fixation devices that could serve as infection vectors.
Solution Approach 2:
The catheter can be removed and repositioned as needed, allowing the system to adapt to changing clinical requirements. The ability to extract and reinsert the catheter provides flexibility in managing treatment duration and addressing complications without being permanently fixed in the body.
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 system effectively increases urine production, reduces sodium retention, and improves renal function by applying negative pressure to the urinary tract, addressing the limitations of existing treatments for venous congestion and fluid overload.
Implementation Method 1
The negative pressure is induced in the at least one inflow lumen of the inflow member by the negative pressure source to remove fluid from the kidney and/or renal pelvis
Implementation Method 2
the retention portion comprising at least one drainage hole leading to the at least one inflow lumen
Data Source
AI summary
A negative pressure therapy device for inducing negative pressure in a urinary tract includes an inflow member and an outflow member. The inflow member includes (i) a proximal portion, (ii) a retention portion configured to be deployed within a renal pelvis of the urinary tract comprising a drainage hole leading to the inflow lumen, and (iii) an intermediate portion between the proximal portion and the retention portion. The intermediate portion is configured to extend through a portion of the kidney to the renal pelvis. The outflow member includes (i) a proximal portion, (ii) a distal end configured to be positioned in the ureter or bladder, and (iii) at least one intermediate portion extending from the proximal portion to the distal end.