Pressurized Liquid Cast for Fracture Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional casts for immobilizing injuries, such as broken bones, often fail to provide a perfect fit due to variability in soft tissue swelling, leading to discomfort, potential infection, and increased medical costs, as they rely heavily on the skill of the medical provider and may require multiple applications or adjustments.
Innovation Solution
An adjustable cast utilizing pressurized liquid to maintain stabilization and immobilization, allowing for adaptation to changes in swelling, with a low-pressure system that can be continuously or intermittently adjusted using a pump and pressure monitor, and is portable, easy to apply, and can be sterilized for surgical use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plaster or fiberglass cast is applied to immobilize a fracture, then the fracture is stabilized and immobilized, but the cast cannot adapt to changes in soft tissue swelling, requiring multiple applications or adjustments
Solution Approach 1:
The cast incorporates an adjustable mechanism that allows the immobilization strength and fit to be dynamically modified after application. This enables the cast to adapt to changing swelling conditions while maintaining fracture stabilization, eliminating the need for multiple cast applications.
Solution Approach 2:
The cast design allows changing key parameters such as pressure and fit after the initial application. By adjusting these parameters in response to swelling changes, the cast maintains both its stabilizing function and adaptability to the patient's changing condition.
2Reliability
If a cast is applied tightly to ensure proper fit and immobilization, then the fracture is well-stabilized, but it may cause compartment syndrome or soft tissue damage by cutting off circulation
Solution Approach 1:
The cast incorporates a feedback mechanism that monitors circulation and swelling conditions. This allows the immobilization strength to be adjusted in real-time, ensuring adequate stabilization while preventing harmful effects such as compartment syndrome by detecting and responding to circulation changes.
Solution Approach 2:
The adjustable nature of the cast allows the immobilization pressure to be dynamically reduced if circulation problems arise, while maintaining sufficient stabilization. This dynamic adjustment capability prevents the harmful effects of overly tight casting.
3Ease of operation
If a skilled medical provider applies a cast with high skill to achieve perfect fit, then the comfort and fit are improved, but the process requires significant provider time and skill
Solution Approach 1:
The adjustable cast design enables providers to achieve high-quality fit with less time and skill investment. The built-in adjustment mechanisms allow for easier fitting and adaptation, reducing the time providers spend on cast application while maintaining or improving fit quality.
4Adaptability or versatility
If adjustable casts are used to adapt to swelling changes, then the adaptability is improved, but they do not provide sufficient stability for many types of fractures
Solution Approach 1:
The cast design achieves both adaptability and stability through dynamic adjustment capabilities. The mechanism allows the cast to maintain firm immobilization for fracture stability while simultaneously adapting to swelling changes, overcoming the limitation of previous adjustable casts that sacrificed stability for adaptability.
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 cast provides consistent support and comfort, reduces the need for repeat visits and pain medication, decreases medical costs, and allows for improved patient satisfaction by maintaining a perfect fit and promoting healing with temperature control.
Implementation Method 1
The present invention provides an adjustable cast that utilizes pressurized liquid to provide sufficient stabilization and immobilization of a patient's injury, while allowing for the cast to adapt and conform to the patient when changes in swelling and the like occur. The present invention thus stabilizes a fracture using fluid pressure or hydrostatic pressure
Implementation Method 2
Because the cast contains pressurized fluid, the fluid can be cooled to decrease pain and swelling
Implementation Method 3
or heated to increase circulation around the injured area
Data Source
AI summary
A pressurized fluid cast for stabilizing a broken bone of a patient includes a sleeve having an inner wall and an outer wall with a fluid cavity between the inner and outer walls. The outer wall has at least one access port established therethrough. The sleeve is configured to be placed at a limb of a patient such that the inner wall circumscribes the limb and is disposed at least partially along the limb, with the fluid cavity and the outer wall being radially outward of the inner wall. The sleeve is adaptable to accommodate a particular patient injury and limb. Fluid is provided within the fluid cavity and is pressurized to a selected pressure to apply substantially uniform pressure at the limb of the patient. An outer protective shell may be provided at least partially around the sleeve to limit puncturing of the sleeve.