You want to flip the framing - start with what currently exists in the world, then show why it falls short. Here's the rewrite:
PROBLEM STATEMENT:
Point-of-Care Devices Exist - But Not for Clot Detection
Portable diagnostic tools are widely used in medicine, yet none offer real-time limb clot detection with visual confirmation at the bedside.
Diagnostic Tools Exist - But They're Slow and Gated
Doppler ultrasound, MRI, and D-dimer tests are available, but they are expensive, time-intensive, and locked behind specialist operators.
Imaging Exists - But It Only Shows Structure
Ultrasound can visualize a clot, but it tells us nothing about how badly the surrounding tissue is being starved of oxygen.
Healthcare Infrastructure Exists - But It Doesn't Reach Everyone
Hospitals, clinics, and emergency services exist worldwide, yet patients in ambulances, rural areas, and smaller facilities still have no access to timely clot diagnosis.