Creatinine biosensors: principles and designs

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Sensor Technology

Background:

• Creatinine biosensors are crucial for diagnosing kidney function.
• Existing potentiometric and amperometric devices face challenges like sensitivity, selectivity, interference, and stability.
• Many current methods require dual-sensor systems for accurate creatinine measurement.

Purpose of the Study:

• To review the operating principles and design of potentiometric and amperometric creatinine biosensors.
• To analyze how device design impacts biosensor performance.
• To highlight the progress and remaining challenges in creatinine biosensor development.

Main Methods:

• Review of existing literature on potentiometric and amperometric creatinine biosensors.
• Analysis of design factors influencing sensor performance metrics.
• Discussion of challenges including sensitivity, selectivity, interference, and stability.

Main Results:

• Potentiometric and amperometric creatinine biosensors have been developed.
• Key performance limitations include the balance between sensitivity and selectivity, interference rejection, and sensor stability.
• Dual-sensor approaches are often needed for accurate creatine and creatinine differentiation.
• Despite challenges, creatinine biosensors are nearing performance levels for practical application.

Conclusions:

• Creatinine biosensor technology is advancing, with both potentiometric and amperometric approaches showing potential.
• Addressing sensitivity, selectivity, stability, and interference are critical for widespread adoption.
• Optimizing device design is key to overcoming current limitations and achieving reliable creatinine detection.