Catheter Cutting Edges for Controlled Puncture Enlargement
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Solution Overview
Problem
Current catheter devices for accessing hollow organs, such as the Seldinger technique, require supplementary cutting instruments like scalpels for enlarging puncture sites, which can lead to accidents, increased procedural time, and risk of hemorrhage or perforation due to lack of precision and control.
Innovation Solution
A catheter device with integrated cutting edges that can enlarge the puncture site without the need for additional instruments, allowing for controlled enlargement by advancing along the guide wire, reducing the risk of accidents and procedural complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a sharp instrument like a surgical scalpel is used to enlarge the puncture site, then the puncture site can be enlarged, but the procedure becomes more complex and risky with potential for hemorrhage or perforation
Solution Approach 1:
The catheter device merges the puncture enlargement function with the catheter body itself by incorporating cutting edges directly onto the catheter. This eliminates the need for separate cutting instruments like scalpels, reducing procedural complexity while achieving the same enlargement effect.
Solution Approach 2:
The catheter device is designed to perform multiple functions: it serves as both the enlargement tool (via integrated cutting edges) and the access device. This multi-functionality eliminates the need for multiple separate instruments, simplifying the overall procedure.
2Area of stationary object
If a surgical scalpel is used to enlarge the puncture site, then the puncture site can be enlarged, but the risk of hemorrhage or perforation increases due to lack of precision and control
Solution Approach 1:
The cutting edges are localized to specific positions on the catheter body, allowing controlled enlargement only at the intended puncture site. This localized cutting capability provides precision and control, preventing unintended hemorrhage or perforation that could occur with free-hand scalpel use.
Solution Approach 2:
The catheter body acts as an intermediary between the guide wire and the skin enlargement process. The cutting edges on the catheter provide a controlled medium for tissue division, mediating the enlargement process in a way that reduces harmful effects compared to direct scalpel application.
3Area of stationary object
If a surgical scalpel is used to enlarge the puncture site, then the puncture site can be enlarged, but the procedural time increases
Solution Approach 1:
By combining the enlargement function with the catheter deployment process itself, the procedure is streamlined. The catheter enlarges the puncture site as it is being inserted, eliminating the need for a separate cutting step and reducing overall procedural time.
Solution Approach 2:
The cutting edges are pre-positioned on the catheter body before insertion. As the catheter is advanced, the enlargement action occurs automatically as a preliminary step to catheter deployment, eliminating the need for subsequent cutting operations.
4Area of stationary object
If supplementary cutting instruments are used, then the puncture site can be enlarged, but the need for additional instruments increases procedural complexity
Solution Approach 1:
The catheter device is designed as a universal instrument that performs both the enlargement function (via integrated cutting edges) and the access function. This eliminates the need for multiple specialized instruments, reducing device complexity.
Solution Approach 2:
The function of supplementary cutting instruments is merged into the catheter body itself. The cutting edges are integrated directly onto the catheter, combining what were previously separate functions into a single instrument.
Data Source
AI summary
Examples of catheter devices, removable needle devices and kits are disclosed. Also methods for accessing a hollow organ are disclosed. The catheter devices include a body extending longitudinally from a proximal end to a distal end, wherein the body includes an elongated channel along a longitudinal length of the body extending from the proximal end to the distal end of the body, wherein the elongated channel is configured to receive an elongated needle of the removable needle device, and the body includes one or more cutting edges extending in a proximal direction from the distal end of the body. The body of the catheter devices includes one or more recesses adapted to mate with one or more catches of the removable needle device for coupling the needle device to the catheter device. Methods of using the catheters, removable needle devices and the kits are also disclosed.