Ankle-Brachial Index (ABI) Doppler Study
Sources
Ankle-Brachial Index (ABI) Doppler Study — 2022-11-25
Facility: Jothydev's Diabetes & Research Centre, Mudavanmugal, Thiruvananthapuram
OP No: 4096
Patient age at time of study: 74 years
Consulting physician: Dr. Jothydev Kesavadev MD
Consultant on report: Not recorded
Study Details
ABI Doppler performed as part of diabetic foot screening. Bilateral ankle and brachial pressures measured.
Measurements
| Parameter | Right | Left | Interpretation |
|---|---|---|---|
| Brachial BP | 130 mmHg | 130 mmHg | Symmetric |
| Dorsalis Pedis pressure | 120 / 100 / 90 mmHg | 120 / 100 / 90 mmHg | Triphasic signal |
| AB Index (ABI) | 0.92 | 0.92 | Normal (TASC II: 0.91–1.40) |
| TB Index (TBI) | 0.69 | 0.69 | Borderline (threshold: >0.70 = normal, ≤0.70 = abnormal) |
TASC II Reference Guidelines
| ABI Range | Classification |
|---|---|
| 0.91–1.40 | Normal |
| 0.71–0.90 | Mild PAD |
| 0.41–0.70 | Moderate PAD |
| <0.40 | Severe PAD |
| >1.40 | Incompressible (calcified) artery |
| TBI | Classification |
|---|---|
| >0.70 | Normal |
| ≤0.70 | Abnormal |
Waveform Findings
- Right Brachial: Multi-peak waveform, Gain 1
- Left Brachial: Multi-peak waveform, Gain 1
- Right Posterior Tibial: Waveform present
- Left Posterior Tibial: Waveform present
- Right Dorsalis Pedis: Waveform present
- Left Dorsalis Pedis: Waveform present
- Right Toe: Triphasic pattern, Gain 1
- Left Toe: Normal waveform, Gain 1
Interpretation
Report conclusion: "Normal ABI study."
ABI is within normal range bilaterally (0.92), but TBI = 0.69 is exactly at the abnormal threshold (≤0.70 = abnormal). In diabetic patients, TBI is often more reliable than ABI because calcified vessels can cause falsely elevated ABI. A borderline TBI of 0.69 in a 74-year-old diabetic patient suggests:
- Possible early distal arterial disease — the microvascular territory served by the toe arteries
- Despite normal ABI, toe perfusion may be at the lower limit of adequate
- Baseline established: any future TBI < 0.69 would represent worseningClinical context: This value should be monitored longitudinally. Combined with biothesiometry values (avg 29–33V) and the monofilament test (all intact), the overall foot risk assessment was low-moderate at this time.
Clinical Context
- Performed as part of comprehensive diabetic foot screening at Jothydev's on 2022-11-25
- Concurrent tests: Biothesiometry 2022 11 25, Monofilament 2022 11 25
- HbA1c on same date: 5.8% (pre-diabetic range by facility standards)
- Patient on insulin (Tresiba) + multiple oral antidiabetics at time of study
- Note: Peripheral arterial status should be reassessed. No imaging records in vault post-2022.
Related Pages
- Diabetes Mellitus — Primary indication
- Biothesiometry 2022 11 25 — Vibration threshold (same visit)
- Monofilament 2022 11 25 — 10g monofilament (same visit)
- Jothydev Kesavadev — Ordering physician
Source: raw/assets/20260429_IMG_9749.jpeg