Bidirectional Scalpel and Tracheal Hook for Emergency Airway Access
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The standard cricothyrotomy procedure faces challenges due to the difficulty in making bidirectional incisions and stabilizing the trachea, leading to a high rate of failure, especially in emergency situations where precise handling of scalpels and tracheal hooks is critical.
Innovation Solution
A surgical device with a bidirectional scalpel and a tracheal hook that allows for smooth incision and stabilization, featuring a scalpel with two opposing cutting edges and a tracheal hook with a barbed tip and curved handle, designed for easy insertion and stabilization of the trachea, reducing the risk of injury and facilitating the placement of a breathing tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a standard scalpel is used for incision, then the incision can be made in one direction, but the instrument must be rotated 180 degrees to cut in both directions, increasing procedure time and complexity
Solution Approach 1:
The scalpel blade is segmented into two opposing cutting edges, allowing the instrument to cut in both directions without rotation. Each edge can be used independently for horizontal or vertical incisions, eliminating the need to rotate the scalpel 180 degrees between cuts.
Solution Approach 2:
The scalpel is designed with dual functionality - a single blade provides both horizontal and vertical cutting capabilities through its two opposing edges. This multi-functional design allows the same instrument to perform multiple cutting directions without requiring separate tools or reorientation.
2Productivity
If the scalpel blade tip is inserted deeply to create a wide hole, then the incision can be sufficient for tube placement, but the trachea may be injured
Solution Approach 1:
The device includes a guide stylet that is inserted first to establish the correct depth and trajectory before the scalpel blade is introduced. The stylet acts as a preliminary guide that prevents over-insertion of the blade, ensuring the incision is made at the appropriate depth without injuring the trachea.
Solution Approach 2:
The guide stylet serves as an intermediary element between the operator and the scalpel blade. It mediates the insertion depth by providing tactile feedback and physical limitation, allowing the blade to follow the stylet's predetermined safe path without exceeding the safe depth that could injure the trachea.
3Productivity
If the scalpel is moved laterally to create a wide incision, then the hole can be sufficient for tube placement, but the great vessels of the neck may be injured
Solution Approach 1:
The guide stylet is inserted first to establish the correct depth and trajectory before the scalpel blade is introduced. The stylet acts as a preliminary guide that prevents over-insertion of the blade, ensuring the incision is made at the appropriate depth without injuring the trachea.
Solution Approach 2:
The device has an asymmetric design where the cutting edges are positioned at different orientations relative to the handle. This asymmetric configuration allows controlled lateral movement in safe directions while preventing excessive lateral deviation that could endanger the great vessels, as the blade geometry naturally guides cuts along safer anatomical planes.
4Ease of operation
If a tracheal hook is used to stabilize the trachea during tube insertion, then tube placement can be facilitated, but the hook may be difficult to position correctly
Solution Approach 1:
The tracheal hook is merged with the scalpel blade into a single integrated device. The hook is positioned at the distal end of the blade handle, allowing the operator to perform incision and tracheal stabilization with one instrument rather than requiring separate positioning of a standalone hook. This integration simplifies the procedure by combining multiple functions in one tool.
Solution Approach 2:
The guide stylet serves as an intermediary element between the operator and the scalpel blade. It mediates the insertion depth by providing tactile feedback and physical limitation, allowing the blade to follow the stylet's predetermined safe path without exceeding the safe depth that could injure the trachea.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
For cricothyrotomy and the like, a surgical device has, in one embodiment, a device body with a bi-directional scalpel, an end cap, and a tracheal hook that fits within a channel formed in the device body. With the end cap removed to expose the bi-directional scalpel blade and with the tracheal hook fully inserted within the body channel, the device can be held, e.g., in the dominant hand of an operator, and manipulated to make an opening in the patient's neck using the exposed scalpel blade. The tracheal hook can then be slid away from the device body with the hook's barbed tip entering the opening to enable the operator to easily and quickly secure the surgical airway. The design of the surgical device enables an economy of movements that otherwise would typically not be within the skill set of an operator who was not a surgeon.