Handheld Microfluidic Cell Lysis Device with Nanoblades
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing mechanical cell lysis equipment lacks single cell resolution, which is necessary for single cell biological studies due to the intrinsic heterogeneity in cell populations, and requires high operating pressures that can lead to biomolecule denaturation and is not suitable for portable devices.
Innovation Solution
A mechanical cell lysing apparatus with single cell resolution that includes an inlet port, a trap structure, a stress raiser to apply mechanical stress, and an outlet port, allowing for low-pressure lysis of cells using hydrodynamic trapping and nanoblades to concentrate force, enabling efficient lysis of mammalian, yeast, and bacterial cells without external power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional high-shear mechanical lysis equipment is used, then cell lysis efficiency is improved, but operating pressure becomes extremely high (up to 40,000 psi) and biomolecules may denature
Solution Approach 1:
The device segments the cell lysis process into two stages: first trapping individual cells in microfluidic chambers, then applying controlled mechanical stress via nanoblades. This segmentation allows single-cell resolution while maintaining low overall pressure requirements, avoiding the need for extreme pressures used in traditional bulk lysis equipment.
Solution Approach 2:
The patent implements local quality by concentrating mechanical stress at specific locations where nanoblades contact trapped cells. Instead of applying high pressure uniformly across a bulk sample, the stress is localized to the cell membrane at the nanoblade contact point, enabling efficient lysis at low applied pressure (less than 5 psi for mammalian cells, less than 40 psi for yeast cells).
2Productivity
If traditional mechanical lysis equipment is used, then cell lysis is achieved, but the equipment becomes bulky and unsuitable for portable devices
Solution Approach 1:
The patent replaces traditional high-pressure mechanical systems with a microfluidic system that uses hydrodynamic flow and localized nanoscale structures. This substitution eliminates the need for bulky high-pressure pumps and mechanical presses, enabling a handheld device design that maintains effective cell lysis capability while achieving portability.
Solution Approach 2:
The invention transitions from macro-scale mechanical lysis to micro-scale and nano-scale operations within microfluidic channels. By moving to smaller dimensions, the device achieves equivalent or superior lysis performance in a compact form factor suitable for portable applications.
3Productivity
If traditional mechanical lysis equipment is used, then bulk cell lysis is achieved, but single cell resolution is not obtained
Solution Approach 1:
The device segments the bulk cell sample into individual cells, each trapped in separate microfluidic chambers. This segmentation enables single-cell resolution by isolating individual cells for targeted lysis, while still allowing processing of multiple cells through the system. The trap structure with controlled flow paths ensures one cell per trap, achieving the required single-cell precision.
4Speed
If high pressure is applied for cell lysis, then lysis speed is improved, but heating occurs and biomolecules denature
Solution Approach 1:
The patent replaces high-power mechanical pressure systems with a low-power microfluidic system using nanoblades. This substitution dramatically reduces power dissipation and associated heating, maintaining rapid lysis speed through efficient mechanical leverage at the nanoscale while avoiding the thermal damage that plagues traditional high-pressure systems.
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 apparatus achieves efficient and controlled lysis of individual cells with low applied pressure, suitable for point-of-care diagnostics and small sample volumes, preserving biomolecules for analysis.
Implementation Method 1
a stress raiser configured to raise a mechanical stress on a membrane of the cell of interest
Implementation Method 2
allowing for low-pressure lysis of cells using hydrodynamic trapping
Data Source
AI summary
Apparatus and methods for mechanical cell lysis with single cell resolution which requires very low applied pressure. The device can be handheld, simple to operate, requires no external power except for hand-applied pressure via a syringe, and is applicable to all cell types including yeast and bacterial cells. The device is also capable of mechanically lysing a single cell. A single cell is selected from a biological sample of interest. The single cell is lysed by application of mechanical stress in a single cell lysing apparatus having a trap structure for deterministically capturing the cell and a stress raiser that cooperates with a source of mechanical stress so as to apply sufficient force to rupture a cell. The stress raiser can be a properly designed edge of the trap or it can be a lithographically produced structure such as a nanoblade or a nanopillar.