Finger Compression Sequence for Adequate Capillary Blood Collection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blood collection devices fail to ensure an adequate amount of blood collection for tests, lacking effective compression mechanisms and control over compression periods, particularly for the distal section of the finger where capillaries are most concentrated.
Innovation Solution
A blood collection device that independently compresses the base, middle, and distal sections of the finger, with a longer compression period for the distal section, and adjusts compression based on bleeding and blood vessel conditions to enhance blood collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If capillary blood collection is performed by pressing a puncture device against the fingertip, then the operation is simpler than venous blood collection, but the amount of blood that can be ensured is small
Solution Approach 1:
The compression mechanism compresses the finger before and during puncture to pre-fill capillaries with blood, ensuring adequate blood flow at the puncture site without requiring complex manual squeezing operations afterward
Solution Approach 2:
A compression mechanism acts as an intermediary device between the puncture device and the finger, controlling blood flow to the puncture site through regulated compression and release cycles to ensure sufficient blood collection
2Quantity of substance
If manual compression and squeezing of the finger is performed to ensure blood amount, then the amount of blood can be increased, but the operation becomes cumbersome
Solution Approach 1:
The compression mechanism automatically performs the compression and release cycles without requiring manual intervention, making the system self-sufficient in managing blood flow while the user simply needs to position their finger
Solution Approach 2:
The manual mechanical squeezing action is replaced with an automated compression mechanism that uses controlled mechanical movement to achieve the same blood flow enhancement effect without requiring user dexterity or strength
3Quantity of substance
If the distal section of the finger is compressed for a short period, then the operation is quick, but blood collection amount is insufficient
Solution Approach 1:
The compression mechanism employs periodic compression and release cycles at the distal section, where each compression phase fills capillaries and each release phase allows blood to flow to the puncture site, repeating this rhythmically to maximize blood collection efficiency within a total time of several seconds
Solution Approach 2:
The distal section compression is performed preliminarily before puncture and continues during blood collection, pre-filling the capillary network with blood to ensure immediate and sufficient blood flow when the puncture occurs
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
The device ensures a sufficient amount of blood collection by actively sending blood into capillaries and minimizing coagulation, facilitating efficient and reliable blood tests.
Implementation Method 1
a blood collection device according to the present invention that collects blood from a puncture mark on a fingertip by repeatedly compressing a finger in order of a base section and/or a middle section and a distal section of the finger
Implementation Method 2
a period of time for compressing the distal section is longer than a period of time for compressing the middle section and/or a period of time for compressing the base section
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Provided are a blood collection device and a blood collection method enabling blood collection from any subject in the necessary amount for a test. The blood collection device is provided with a compression mechanism that independently compresses the base section and/or the middle section and the distal section of a finger, and collects blood from a puncture mark on the fingertip by repeatedly compressing the finger in the order of the base section and/or the middle section and the distal section. This blood collection device is characterized in that a period of time for compressing the distal section is longer than a period of time for compressing the middle section and/or a period of time for compressing the base section.