Inflatable Bladder Joint Aspiration Device
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Solution Overview
Problem
Current orthopedic devices do not adequately facilitate knee aspiration procedures, making it difficult for medical practitioners to successfully aspirate joint fluid without contacting pain-sensitive structures, and requiring specialized training for general practitioners to perform the procedure.
Innovation Solution
A joint aspirate-facilitating device made of flexible, cloth-like material with an inflatable bladder that displaces joint fluid to a targeted location, increasing the volume and pressure of the fluid sac, thereby enlarging the area for needle insertion and reducing the risk of striking bone or unintended tissue, and incorporating features like a pressure gauge and disposable sterile dressing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If an inflatable bladder is used to displace joint fluid to a targeted location, then the volume and pressure of the fluid sac is increased, but the device complexity increases
Solution Approach 1:
The patent employs an inflatable bladder that uses pneumatic pressure to displace joint fluid to a targeted location. The bladder is inflated through a needle or catheter, creating hydraulic/pneumatic pressure that moves the fluid sac to a more accessible area for aspiration, thereby increasing fluid volume and pressure without requiring complex mechanical systems
Solution Approach 2:
The device changes the physical parameters (volume and pressure) of the joint fluid by inflating the bladder. This parameter change displaces the fluid to a targeted location, increasing the effective size of the fluid sac and making aspiration easier without adding complex mechanical components
2Reliability
If the area for needle insertion is enlarged, then the risk of striking bone or unintended tissue is reduced, but the precision of needle placement may be compromised
Solution Approach 1:
The inflatable bladder performs a preliminary action by displacing the joint fluid to a targeted location before the aspiration needle is inserted. This pre-positioning of the fluid sac creates a larger, more accessible target area, ensuring that even if needle placement is not perfectly precise, the needle will still enter the fluid sac rather than striking bone or unintended tissue
Solution Approach 2:
The bladder acts as an intermediary between the joint fluid and the aspiration needle. By positioning and enlarging the fluid sac, the bladder mediates the interaction between the needle and fluid, making the aspiration process more reliable while reducing the need for extremely precise needle placement
3Measurement precision
If a medical specialist performs the aspiration procedure, then the precision and success rate are improved, but the cost and accessibility of the procedure increase
Solution Approach 1:
The inflatable bladder device enables a form of self-service by preparing the joint fluid for aspiration in advance. The bladder automatically positions and enlarges the fluid sac, reducing the skill level required for the actual needle insertion and aspiration process, thereby allowing non-specialists to perform the procedure with increased ease and accuracy
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 enhances the ability of medical practitioners to successfully perform knee aspirations by increasing the effective size of the fluid sac, reducing the risk of complications, and allowing non-specialists to perform the procedure with increased ease and accuracy.
Implementation Method 1
The bladder is specially sized and positioned to place pressure on specified regions of the joint to thereby displace distended joint fluid into a targeted location. The volume and pressure of the joint fluid is increased at the targeted location
Data Source
AI summary
A joint aspirate-facilitating device is provided including a flexible main panel that is secured to the joint to be aspirated. An inflatable bladder is secured to the main panel and is placed in contact with the soft tissues overlying and surrounding the joint space. The bladder is used to apply pressure to selected areas of the joint to compress the fluid sacs in the joint. An access opening is formed in the main panel designating the location where joint fluid is to be aspirated. The joint fluid is directed to flow to the area of the joint exposed at the access opening based on the shape of the bladder that compresses surrounding areas of the fluid sacs. A conventional hand pump may pressurize the bladder or the bladder may be filled with a viscous gel material to generate pressure. Multiple access openings may be formed on the main panel designating locations where aspiration is to be conducted. For multiple access openings, plugs may be used to fill those openings where aspiration is not conducted, thereby maximizing joint fluid flow only to the selected location where aspiration is to be conducted. An ultrasound probe may be attached and incorporated into the device to confirm joint fluid displacement into the targeted location prior to need aspiration. A disposable molded sterile dressing may applied to the access opening to reduce the risk of infections. The device can be used on any joint of the body, and the particular shape of the main panel and bladder accommodates maximum joint fluid flow to the point where aspiration is desired.