Related Experiment Video
Updated: Feb 1, 2026
09:58
A 3D System for Culturing Human Articular Chondrocytes in Synovial Fluid
Published on: January 31, 2012
21.3K
Bacterial detection and identification from human synovial fluids on an integrated microfluidic system
Ting-Hang Liu1, Shu-Shen Cheng, Huey-Ling You
1Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan. gwobin@pme.nthu.edu.tw.
The Analyst
|December 7, 2018
Summary
A novel microfluidic system rapidly detects and identifies bacteria in human synovial fluid, enabling faster diagnosis of periprosthetic joint infections (PJIs). This integrated chip automates sample processing and nucleic acid amplification for quicker, more informed clinical decisions.
Area of Science:
- Biomedical Engineering
- Molecular Diagnostics
- Infectious Disease Research
Background:
- Periprosthetic joint infections (PJIs) are severe complications following joint replacement surgery.
- Current diagnostic methods, primarily culture-based, are time-consuming (3-7 days).
- Rapid and accurate diagnosis of PJIs is crucial for effective treatment and patient outcomes.
Purpose of the Study:
- To develop an integrated microfluidic system for rapid detection and identification of bacteria in human synovial fluid (HSF).
- To automate the entire molecular diagnostic process from sample treatment to optical detection on a single chip.
- To improve the speed and efficiency of diagnosing PJIs compared to traditional methods.
Main Methods:
- Development of a microfluidic system automating sample treatment, bacterial isolation, lysis, PCR amplification, and optical detection.
- Utilized N-acetyl-l-cysteine to reduce HSF viscosity and vancomycin-coated nano-magnetic beads for bacterial isolation.
- Employed universal 16S ribosomal RNA and species-specific primers for PCR-based identification of common PJI-associated bacteria (e.g., S. aureus, E. coli).
Main Results:
- Achieved a limit of detection as low as 100 CFU/mL, suitable for clinical diagnostics.
- Successfully detected and identified four common PJI-associated bacteria: Staphylococcus aureus, methicillin-resistant S. aureus, Escherichia coli, and Acinetobacter baumannii.
- Obtained bacterial detection and identification results within 90 minutes, significantly faster than traditional methods.
Conclusions:
- The developed microfluidic system offers a promising tool for the rapid diagnosis of PJIs.
- Automation and speed of the system facilitate timely clinical decisions regarding post-operative antibiotic administration.
- This technology represents a significant advancement over conventional culture-based diagnostic approaches for PJIs.
Related Concept Videos
01:16Structural Joints: Synovial Joints
6.8K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
6.8K
01:34The Fluid Mosaic Model
178.0K
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
178.0K
01:07Development of the Limb Synovial Joints
2.3K
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
2.3K
01:30Bacterial Signaling
40.7K
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
40.7K
01:26Integration by Parts: Indefinite Integrals
173
Integration by parts is a fundamental technique in calculus for evaluating integrals involving the product of two functions. It is particularly useful when direct integration is not feasible. The method is based on the product rule for differentiation, which states that the derivative of a product equals the derivative of the first function times the second, plus the first function times the derivative of the second. By integrating this identity and rearranging terms, the integration by parts...
173
01:23Integration by Parts: Definite Integrals
80
Definite integrals involving the product of two functions over a fixed interval can be evaluated using integration by parts. This method rewrites the integral as the difference of a product evaluated at the endpoints and a remaining definite integral that is often simpler to compute.A representative example is the definite integral of the inverse tangent function. Since there is no direct integration formula for arctan x, the integrand is rewritten as a product of arctan x and the...
80