Continuous Glucose Sensor Guide Needle Design for Early Accuracy
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Solution Overview
Problem
Conventional continuous blood glucose measurement systems experience lowered accuracy at the initial stage of operation due to the formation of an incised portion by the guide needle, which affects the sensing area, leading to inaccurate measurements.
Innovation Solution
A continuous glucose measurement apparatus with a guide needle designed to not cover any partial area of the sensing area, allowing the incised portion to be formed away from the sensing area, thereby preventing the reduction in blood glucose measurement values and improving accuracy without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a guide needle is used to guide insertion of the sensor module, then insertion guidance is improved, but the incised portion formed by the guide needle covers the sensing area causing measurement inaccuracy
Solution Approach 1:
The guide needle is divided into a needle body and a separate needle guard. The needle guard is designed to prevent the incised portion from covering the sensing area, while the needle body provides the necessary insertion guidance. This segmentation allows the two functions to coexist without interference.
Solution Approach 2:
The needle guard is designed with specific local properties - it covers only the areas where incisions would harmfully affect the sensing area, while leaving other areas exposed. This localized protection approach ensures measurement accuracy is maintained in critical zones while still providing guidance functionality.
2Stability of the object's composition
If the guide needle covers the sensing area to guide insertion, then insertion stability is improved, but the incised portion forms around the sensing area requiring additional devices to protect
Solution Approach 1:
The needle guard is integrated with the needle body to form a unified guide needle assembly. This merging eliminates the need for separate protective devices while maintaining insertion stability and preventing harmful incisions around the sensing area.
Solution Approach 2:
The guide needle structure is designed to be self-protective - the needle guard automatically prevents the incised portion from covering the sensing area during insertion, eliminating the need for additional protective devices or complex control mechanisms.
Data Source
AI summary
The present disclosure relates to a continuous blood glucose measurement device configured to prevent, in a state where a body attachment unit is inserted in and attached to a human body, an incision portion made by a guide needle from being formed to surround at least a part of a sensing area formed at a sensing member, whereby an incision portion is not formed around the sensing area so as to prevent the incision portion from causing a drop in a blood glucose measurement value and thus enable detection of an accurate blood glucose measurement value from the early stage of operation. Further, the guide needle has a shape not surrounding at least a part of the sensing area, so as to prevent, even without an additional device, the guide needle from forming an incision portion around the sensing area in a human body and thus enhance, by a simple structure, the accuracy of blood glucose measurement.