Toe Brachial Index (TBI)
The Toe Brachial Index (TBI) is a specialized vascular test that compares the blood pressure in the toe to that in the arm. TBI is especially valuable for patients with non-compressible arteries or diabetes, where traditional ABI may be less reliable.
TBI is the ratio of the systolic blood pressure in the toe to that in the arm. Because digital arteries are less likely to be calcified, TBI provides a more accurate assessment of peripheral artery disease (PAD) in certain populations.
- Ideal for patients with diabetes or advanced age
- Non-invasive and quick to perform
- Complements ABI for comprehensive vascular assessment
A small cuff is placed around the toe, and a photoplethysmography (PPG) sensor detects blood flow. Systolic pressure is measured in both the toe and the arm, and the TBI is calculated. This test is particularly useful when ABI results are inconclusive.
- Uses sensitive PPG sensors for accurate detection
- Automated measurement and calculation
- Results interpreted alongside clinical findings
TBI is especially valuable for:
- Diagnosing PAD in patients with non-compressible arteries
- Assessing vascular health in diabetic patients
- Guiding treatment and monitoring disease progression
- Providing additional data when ABI is unreliable
TBI is recommended in clinical guidelines for patients with suspected PAD and inconclusive ABI results.
VasoGuard streamlines TBI measurement with advanced PPG sensors and automated software. The system ensures accurate, reproducible results and integrates seamlessly with other vascular tests for a complete assessment.
- High-sensitivity PPG technology
- Automated workflow and data export
- Easy-to-use interface for clinicians