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Presentation Description
Institution: Townsville University Hospital - Queensland, Australia
Purpose
Toe pressures (TP), ankle-brachial index (ABI) and transcutaneous oximetry measurements (TCOM) are modalities used to predict wound healing in patients with PAD. However, they have their limitations and pedal acceleration
time (PAT) is a novel alternative modality. We compared PAT and assessed whether it could predict the clinical outcomes of patients with lower limb wounds or claudication.
Methodology
All patients who underwent lower limb arterial duplex scans over a 4-month period (November 2023 to Feb 2024) also had a PAT. Their charts were reviewed and relevant clinical information was collected. The patients with wounds were placed into three groups: those with healing wounds, those with uncertain wound healing, and those who required revascularisation or amputation. Patients with claudication were placed into three groups: pre-operative, post-operative with symptom resolution, and post-operative with ongoing claudication. Analysis was performed using one-way ANOVA assuming non-normal distribution.
Results
There were 99 legs scanned. There were 67 males and 32 females. 52 scans were performed for critical limb, 20 for claudication. There were 24 TP’s.
There was a strong negative correlation between TP and the lateral plantar artery PAT (rho = -0.7271, p=0.0002). Patients with healing wounds had a lower PAT than those who required intervention (103ms vs 147ms, p=0.0002). There was no difference in PAT between patients with healing wounds and indeterminate wounds. The follow-up time of the groups were statistically similar.
In comparison, TP could not differentiate between the healing group and the intervention group.
There was a difference in PAT between the pre-operative claudication patients and those who had post-operative symptom resolution (93.5ms vs 68.0ms, p=0.038).
Conclusion
PAT can be used to predict the outcome of a wound, or the post-operative symptom resolution of a patient with claudication. It is negatively correlated with TP, and in this study performed better than TP.
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Authors
Authors
Dr Mike Wu - , Dr Takuma Konno - , Mr Brodie Taylor - , Mr Jake Perry - , Dr Victoria White - , Dr Ramesh Velu - , Dr Yew Toh Wong -