Sensitivity enhancement in lateral flow assays: a systems perspective.

Area of Science:

• Biotechnology and Biomedical Engineering
• Analytical Chemistry
• Point-of-Care Diagnostics

Background:

• Lateral flow assays (LFAs) are widely utilized for rapid, cost-effective diagnostics in medical and environmental fields, especially in resource-limited settings.
• Historically, LFAs have faced criticism regarding their limited sensitivity, hindering their adoption in certain critical applications.
• Expanding global use of LFAs has spurred research into overcoming their inherent sensitivity limitations.

Purpose of the Study:

• To critically review and compile state-of-the-art methodologies for enhancing the sensitivity of lateral flow assays.
• To evaluate these sensitivity enhancement approaches from an integrated, system-level perspective.

Main Methods:

• Comprehensive literature review of current techniques for LFA sensitivity improvement.
• System-level analysis categorizing approaches based on their impact on integrated chemical, physical, and optical LFA properties.
• Evaluation of trade-offs between sensitivity enhancement and other LFA advantages (e.g., cost, speed, ease of use).

Main Results:

• Numerous advanced strategies exist to significantly boost LFA sensitivity.
• The effectiveness and practicality of each method are intrinsically linked to the LFA's overall system design.
• Sensitivity improvements can be achieved without compromising the core benefits of LFAs.

Conclusions:

• Substantial enhancements in lateral flow assay sensitivity are achievable through various innovative techniques.
• A holistic, system-level understanding is crucial for selecting and implementing effective sensitivity-boosting strategies.
• Future LFA development should focus on integrated approaches that optimize sensitivity while preserving assay accessibility and affordability.