Handheld Blood Collection Device with Position Detection
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Solution Overview
Problem
Traditional blood collection methods, such as phlebotomy and capillary blood extraction, are invasive, painful, and prone to errors due to limited blood volume and quality issues, which can lead to misdiagnosis and discomfort for patients.
Innovation Solution
A handheld device with a cartridge system that includes a puncture assembly and position detection system for precise targeting and minimally invasive blood collection, allowing for efficient and accurate withdrawal of blood samples without the need for extensive training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional phlebotomy is used for blood collection, then sufficient blood volume can be obtained, but the procedure is invasive, painful, and requires extensive training
Solution Approach 1:
The patent replaces the manual mechanical skill of traditional phlebotomy with an automated device system that uses a position detection system (optical or capacitive sensors) to automatically locate veins and guide needle insertion, eliminating the need for extensive operator training while maintaining blood collection effectiveness
Solution Approach 2:
The device performs self-positioning and self-guidance functions through integrated position detection systems that automatically identify target veins and guide needle insertion without requiring operator skill or judgment, making the procedure independent of operator training level
2Object-affected harmful factors
If capillary blood extraction is used, then the procedure is less invasive, but the blood volume is limited and blood quality deteriorates
Solution Approach 1:
The patent changes the fundamental parameter of blood source from capillary to venous blood through controlled puncture, enabling access to larger blood volume reservoirs while maintaining minimal invasiveness through precise, single-attempt venous access that avoids the need for repeated capillary punctures
3Object-affected harmful factors
If capillary blood extraction is used, then the procedure is less invasive, but blood quality parameters such as WBC count, RBC count, platelet count, and potassium concentration are adversely affected
Solution Approach 1:
The patent replaces the mechanical squeezing and milking actions that cause hemolysis and cell damage with a controlled puncture and vacuum-based blood draw system, eliminating shear forces that destroy red blood cells and activate platelets, thereby preserving blood sample quality for accurate CBC and electrolyte analysis
4Quantity of substance
If repeated squeezing (milking) is used to increase blood volume, then more blood can be collected, but the quality of extracted blood deteriorates and the process becomes laborious
Solution Approach 1:
The patent replaces the manual mechanical action of squeezing and milking with a vacuum-driven blood collection system that uses negative pressure to draw blood through the puncture site, eliminating the need for manual manipulation that degrades blood quality through shear forces and cell damage
Data Source
AI summary
A method and device for collecting a blood sample from a subject are provided. The handheld device comprises an actuator assembly and a body housing the actuator assembly and having a cavity configured to releasably receive a cartridge to couple to the actuator assembly. The cartridge is configured to capture the blood sample from the subject when used with the device. The blood sample is collected when the device determines that the cartridge is properly positioned over a vein or capillaries of the subject.