Blood Viscosity: Why Your Blood Should Flow Like Ketchup for Medical Diagnostics

Understanding Rheology

• 💡 Rheology is the study of the flow and deformation of materials, primarily measuring their viscosity or thickness.
• 🔬 It's most useful for materials that are neither purely liquid nor solid, but a combination of both.
• 🛠️ Concepts of rheology are easily understood by comparing everyday products like lotions, motor oils, and cement, which rely on specific flow properties for their intended function.

Everyday Examples of Flow

• 🥜 Peanut butter's consistency can vary, affecting how well it spreads or sticks to bread.
• 🧴 Shampoo's ideal flow allows it to be squeezed from a bottle and stay on your hand, but dilution with water can ruin this property.
• 🍅 Ketchup serves as a prime example, with different brands exhibiting significant texture differences that affect how quickly they drain.

Blood as a Non-Newtonian Fluid

• 🩸 Blood is a non-Newtonian fluid, flowing more like ketchup than water, and is specifically a shear-thinning fluid.
• ⚠️ This flow property is crucial for healthy blood circulation; excessively high viscosity can increase the risk of clots or aneurysms.
• 🩺 Measuring blood viscosity could provide physicians with an additional method for detecting cardiovascular disease.

The Potential of Blood Rheology in Medicine

• 📈 Despite over 100 years of study showing a correlation between blood viscosity and cardiovascular disease, it's not widely used as a diagnostic tool.
• 🏥 Blood pressure monitoring, used for over 300 years, highlights the potential impact of a widely adopted diagnostic metric.
• 🚀 The speaker is developing a small, portable microfluidic chip to simplify rheological measurements, aiming to make them more accessible and affordable than current bulky, expensive machines.

Advancing Blood Rheology Diagnostics

• 🗣️ Spreading public awareness about blood rheology is essential for its adoption as a common diagnostic tool.
• 🤝 Collaboration between physicians and engineers can lead to practical solutions that leverage this knowledge.
• ✅ Increased awareness and adoption of blood rheology could help address pressing modern medical issues and potentially save lives.