Postpartum Tamponade Balloon with Automatic Pressure Release
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Solution Overview
Problem
Current devices for managing postpartum hemorrhage are costly, complex, and often ineffective in resource-constrained settings due to insufficient inflation volumes and safety risks associated with additional saline use, with existing alternatives like balloon tamponades being time-consuming and not designed for PPH situations.
Innovation Solution
A device featuring a one-way inlet valve, pressure release component, and attachment means for a reusable expandable vessel (balloon or condom) that automatically maintains a steady state pressure, allowing for secure placement and inflation within the uterus, using a large diameter tube as a core guide and a small diameter tube for external management, with a pressure release mechanism to mitigate risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a balloon tamponade device is used to apply pressure to the uterine wall, then bleeding can be stopped, but the device is costly and complex to use
Solution Approach 1:
The device is divided into separate functional components: a reusable balloon catheter, a separate inflation mechanism with valve, and a pressure release mechanism. This segmentation allows each component to be optimized independently and simplifies the overall system for resource-constrained settings.
Solution Approach 2:
The device incorporates automatic pressure maintenance through a pressure-sensitive membrane that automatically releases excess fluid to maintain optimal pressure, eliminating the need for continuous manual monitoring and adjustment by healthcare workers.
2Force
If the balloon is inflated with saline solution to apply pressure, then the bleeding source can be compressed, but insufficient inflation volume causes the balloon to slip out of the uterus
Solution Approach 1:
The device uses a pressure-sensitive membrane as a feedback mechanism that automatically detects when optimal pressure is achieved and releases excess fluid, ensuring the balloon maintains sufficient inflation volume to prevent slippage while avoiding over-inflation.
Solution Approach 2:
The system dynamically adjusts the inflation volume parameter through automatic pressure-controlled fluid release, transitioning from manual volume estimation to automated pressure-based volume regulation to ensure adequate retention.
3Reliability
If additional saline is added to the balloon to prevent slippage, then retention is improved, but health risks arise from concealment of ongoing bleeding
Solution Approach 1:
The pressure-sensitive membrane provides continuous feedback on internal pressure, automatically releasing fluid when optimal pressure is reached, which prevents over-inflation and the associated risk of concealing ongoing bleeding while maintaining sufficient retention pressure.
Solution Approach 2:
The device self-regulates its own inflation volume through the pressure-sensitive membrane mechanism, eliminating the need for manual over-inflation to prevent slippage and the associated safety risks.
4Measurement precision
If ultrasound is used to estimate uterine volume for filling the device, then accurate filling can be achieved, but the process is time-consuming
Solution Approach 1:
The device eliminates the need for external ultrasound measurement by incorporating an internal pressure-sensitive membrane that automatically regulates inflation based on actual uterine pressure conditions, significantly reducing preparation time.
Solution Approach 2:
The system replaces the mechanical ultrasound imaging process with a direct pressure-based mechanical feedback mechanism that provides real-time information about adequate inflation without requiring external diagnostic equipment.
5Ease of manufacture
If a reusable expandable vessel is used instead of disposable devices, then cost is reduced and reusability is achieved, but the device must be cleaned and sterilized
Solution Approach 1:
The balloon catheter is constructed from flexible, sterilizable materials that can withstand repeated cleaning and sterilization processes while maintaining their functional properties, enabling reusable deployment in resource-constrained settings.
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 device provides a cost-effective, safe, and efficient management of postpartum hemorrhage by maintaining uniform pressure, preventing balloon slippage, and allowing for reuse, thus addressing the limitations of existing technologies.
Implementation Method 1
a pressure release component having a configuration adapted to connect to the adapter's free end and provide for the automatic release from the device of a quantity of fluid sufficient to maintain an approximate, steady state, uniform operating pressure of the fluid within the device
Implementation Method 2
a one-way, inlet valve connected to a tube end for controlling the flow of fluid into the expandable vessel
Implementation Method 3
a portion of the inflating outer surface of the vessel expands to apply a pressure along a portion of the patient's uterine cavity
Data Source
AI summary
An improved device for the management of a patient's uterine hemorrhage has improvements that include: (a) an inlet valve for controlling the flow of fluid into an expandable vessel, (b) an adapter having a free end and a connection end that connects to the third opening in a tube that has openings at each of its ends, (d) a pressure release component that connects to the adapter's free end and provides for the automatic release of a quantity of fluid sufficient to maintain an approximate, steady state, uniform operating pressure within the device, and (e) an attachment means that affixes the free end of the expandable vessel to the tube at a point that is distal from a tube end so that a portion of the tube extends into the expandable vessel and can be used as a core to assist with the placement of the vessel into the patient's uterine cavity prior to its inflation.