Spring Hypodermic Needle With Bi-Color Indicator
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Solution Overview
Problem
Existing needle technologies lack the ability to provide immediate feedback when the tip enters a blood vessel or cavity, leading to potential vessel rupture, difficulty in accessing collapsed vessels, and risk of spinal injuries during procedures like lumbar puncture.
Innovation Solution
A spring-actuated needle with a bi-color indicator that changes from green to red when the tip enters a lumen or cavity, indicating successful penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a regular needle is used for blind insertion, then the procedure is simple and quick, but the operator cannot detect when the needle enters a vessel or cavity, leading to potential vessel rupture and patient injury
Solution Approach 1:
The needle is divided into two separate pieces: a first piece containing the tip and a spring mechanism, and a second piece containing the indicator and fluid passage. This segmentation allows the tip to be separated from the indicator, enabling independent movement and detection functionality without compromising the overall structural integrity or operational simplicity of the needle system.
Solution Approach 2:
The spring mechanism provides immediate tactile feedback to the operator when the needle tip enters a vessel or cavity. The spring compresses during insertion and releases when resistance is encountered, giving audible and tactile signals that indicate vessel entry, thereby eliminating blind insertion and preventing vessel rupture.
2Productivity
If a regular needle is used for emergency cannula insertion in collapsed patients, then the procedure can be performed quickly, but the collapsed and attenuated blood vessels are difficult to access and may rupture during blind insertion
Solution Approach 1:
In emergency situations with collapsed vessels, the spring mechanism provides immediate feedback when the needle tip contacts the vessel wall or enters the lumen. This allows the operator to adjust insertion depth and angle in real-time, preventing vessel rupture while maintaining rapid insertion speed crucial for emergency救治.
Solution Approach 2:
The bi-color indicator changes from green to red when the needle tip enters a vessel or cavity, providing visual confirmation of successful penetration. This color change mechanism helps operators quickly verify correct placement without delaying the emergency procedure.
3Ease of manufacture
If a regular needle is used for lumbar puncture, then the procedure can be performed with standard equipment, but blind insertion may cause serious complications and injuries to the spine
Solution Approach 1:
The spring mechanism provides continuous tactile feedback during lumbar puncture insertion, allowing the operator to detect when the needle tip enters the spinal cavity. This immediate feedback enables precise control of insertion depth, preventing over-penetration and serious spinal complications while maintaining procedural simplicity.
Solution Approach 2:
The spring mechanism replaces the need for complex mechanical depth control systems with a simple elastic feedback mechanism. The spring compresses during insertion and provides tactile signals when resistance is encountered, eliminating the need for complex mechanical stoppers or depth indicators while reducing spinal injury risk.
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
Enables immediate detection of vessel entry, reducing patient discomfort, facilitating cannula insertion in emergency cases, and preventing complications by providing visual confirmation of needle placement.
Implementation Method 1
a first piece (1) has four parts; bi-color indicator part (green and red) (5), spiral spring part (4), shaft part (3) and tip part (2)... The spring is squeezed and the indicator shows the green color... The spring is freed and the indicator shows the red color
Data Source
AI summary
A needle that consists of two pieces: the first piece has a tip, a shaft, a spring and a bi-color indicator, and the second piece has two parallel hollow lumens; one lumen is for fluid entrance and passage, and the other lumen configured to receive the first piece. When the hypodermic needle tip touches the skin or being inside a tissue the spring will be squeezed and the first piece will be situated backward in its primary position. When the tip of the needle just enters any cavity or any vessel the spring will be freed and pushes the first piece forward with the change of the color of the bicolored indicator.