Flexible Cannula with Axial Holes for Tracheal Anesthesia
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Solution Overview
Problem
Existing medicine administering devices for laryngo-tracheal anesthesia are prone to breakage due to their rigid material composition, which can cause injury and discomfort during insertion or removal from the airway, and fail to effectively deliver anesthetizing fluid without causing discomfort.
Innovation Solution
A medicine administering device featuring a cannula made of low-density polyethylene with malleable properties that can bend and flex, equipped with a bendable portion containing axial holes for spraying anesthetizing fluid onto the trachea, ensuring safe and effective delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cannula is made of rigid plastic or semi-rigid material, then the cannula maintains structural integrity, but the cannula is prone to breaking during insertion or removal and causes injury to the airway
Solution Approach 1:
The cannula is made of flexible material (e.g., soft plastic, rubber, or silicone) instead of rigid plastic, allowing it to bend and flex during insertion and removal without breaking, thereby eliminating the risk of injury to the oropharynx, esophagus, or trachea while maintaining structural integrity
Solution Approach 2:
The material properties of the cannula are changed from rigid to flexible by selecting materials with appropriate elastomers or polymers, which provides both flexibility for safe insertion/removal and sufficient strength to maintain cannula functionality throughout the procedure
2Ease of operation
If the cannula is made of rigid material, then the cannula is easy to insert and remove, but the cannula causes discomfort and potential injury to the patient
Solution Approach 1:
The flexible cannula material allows the tube to conform to the airway anatomy during insertion and removal, reducing friction and discomfort while eliminating the risk of injury from rigid edges or breakage
Solution Approach 2:
The cannula is designed with a curved or pre-shaped configuration that follows the natural anatomy of the airway, facilitating easier and more comfortable insertion and removal while reducing patient discomfort
3Productivity
If the cannula has axial holes for spraying anesthetizing fluid, then the anesthetizing fluid is delivered effectively onto the trachea, but the cannula structure becomes more complex
Solution Approach 1:
The cannula incorporates axial holes or porous sections at the distal end, allowing anesthetizing fluid to be sprayed directly onto the trachea through the cannula wall, providing effective local anesthesia while maintaining a relatively simple overall cannula structure
Solution Approach 2:
The cannula is divided into functional sections: a proximal insertion portion, a distal spray portion with axial holes, and a hub portion for syringe connection, allowing each segment to be optimized for its specific function while keeping the overall design simple
Data Source
AI summary
A medicine administering device for delivering anesthetizing fluid on trachea is disclosed. The medicine administering device includes a syringe and a cannula. The cannula extends from the syringe. The cannula is made of a low-density polyethylene with malleable properties such that the cannula can bend and flex without breaking during use. Further, the cannula has a bendable portion with axial holes towards its distal end. The medicine administering device includes a medicine container. The medicine container contains anesthetizing fluid. The syringe receives the medicine container. A doctor places the cannula in the airway of a patient and operates the syringe to expel a predetermined volume of the anesthetizing fluid from the medicine container. The anesthetizing fluid flows through the cannula and gets sprayed from the axial holes onto the trachea.