Blood Collection Device with Segmented Tip and Pressure Control
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Solution Overview
Problem
Existing blood collecting instruments face challenges in efficiently collecting a sufficient volume of blood without scattering it to the open air, leading to burdensome procedures and potential contamination risks, and often result in poor inspection accuracy due to delayed blood collection and changes in blood constituent concentration.
Innovation Solution
A blood collecting device with a container having open and close ends, a holder to position the container upright, a pressure changing unit for applying pressure or negative pressure, a puncture unit for relative movement, and a lid to seal the container, allowing for efficient blood collection without exposure to the open air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a puncture/blood collecting tip is formed of plastic to prevent deformation, then the tip structure is stable, but the blood holder is less likely to aspirate blood and sufficient blood volume cannot be collected
Solution Approach 1:
The puncture tip is divided into two separate components: a plastic puncture portion for stable puncture and a metal blood holder portion for effective blood aspiration. This segmentation allows each component to be optimized for its specific function without compromise.
Solution Approach 2:
The plastic puncture portion and metal blood holder portion are combined into a single integrated tip assembly. The plastic portion provides structural stability during puncture while the metal portion ensures effective blood aspiration, resolving the contradiction between stability and blood collection efficiency.
2Ease of operation
If the blood aspirating passage is open to the atmosphere, then blood can be easily collected, but the blood adheres to surrounding configurations or scatters to open air causing infection risk
Solution Approach 1:
The blood aspirating passage is designed as a closed system isolated from the atmosphere. Blood is aspirated through an enclosed passage that prevents exposure to air, eliminating the risk of contamination while maintaining ease of operation through the closed-loop design.
Solution Approach 2:
A closed passage structure serves as an intermediary between the puncture site and the collection container, allowing blood to be transferred without direct exposure to the atmosphere. This intermediary structure prevents both adhesion to surrounding configurations and scattering to open air.
3Quantity of substance
If the blood collecting site is pressurized after puncture to ensure blood flow, then blood can be collected, but it takes time and the puncture site dries causing poor inspection accuracy
Solution Approach 1:
Pressure control is performed as a preliminary action before puncture rather than after. By adjusting the pressure in advance, blood flow is optimized at the moment of puncture, enabling rapid blood collection without delays caused by post-puncture pressurization and preventing drying at the puncture site.
Solution Approach 2:
The mechanical pressurization method is replaced with a pressure control system that regulates pressure before and during puncture. This substitution allows for more precise and rapid blood collection by eliminating the time-consuming post-puncture pressurization step.
4Quantity of substance
If repeated puncture is performed to collect sufficient blood volume, then the required blood amount can be obtained, but the patient feels burdensome
Solution Approach 1:
The blood collection device performs self-service by automatically aspirating blood through the integrated blood holder and aspirating passage. Once punctured, the device autonomously collects the required blood volume without requiring repeated manual puncture operations, significantly reducing patient burden.
Solution Approach 2:
The blood aspiration process is designed to be continuous and efficient, with the metal blood holder and closed passage enabling uninterrupted blood flow collection. This continuity allows sufficient blood volume to be obtained in a single puncture event, eliminating the need for repeated procedures.
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 rapid and efficient blood collection in a short time, minimizing exposure to the environment and reducing the risk of contamination, while maintaining accurate blood constituent analysis.
Implementation Method 1
a pressure changing unit that pressurizes the blood collecting target or that applies negative pressure into a space surrounded by the blood collecting target and the container
Data Source
AI summary
A blood collecting device collects blood in a short time after puncture without scattering the blood into the open air other than a container for collecting the blood. One of representative blood collecting devices has a container unit that includes a screw portion, a holder that holds the container unit serving as a system whose one end is closed, a puncture unit that can be attached to the container or the holder, a through-hole of the puncture unit, and a puncture unit protection member that protects the puncture unit and the container unit.