Objective perfusion targets for wound healing (toe pressure, TcPO2, SPP) and their use
Type
ModificationConfidence
92%
Created
Apr 19, 2026
Evidence
1 source
Rationale
The stale 2025 ACC scientific statement citation [@acc2025-h] was replaced with the superseding 2026 ACC/AHA lower extremity peripheral artery disease guideline [@acc2026] for both claims it supported in this section. The newer guideline covers the same recommendations regarding TP and TcPO₂ as preferred diagnostic tools over ABI in patients with diabetes and MAC, and their use as hemodynamic targets for revascularization. No content was removed; only the citation attribution was updated to reflect the current authoritative guideline. The existing [@conte2019] citation was preserved as it supports distinct foundational claims about critical ischemia thresholds.
Evidence
Content Changes
Objective perfusion measurements are essential for assessing tissue viability and guiding revascularization in chronic limb-threatening ischemia (CLTI). Toe pressure (TP) <30 mmHg or transcutaneous oxygen tension (TcPO₂) <25–30 mmHg indicates critical ischemia with low likelihood of wound healing without revascularization (Conte 2019)📄. In patients with diabetes, TP and TcPO₂ are more reliable diagnostic tools than the ankle-brachial index (ABI), which may be falsely elevated due to medial arterial calcification (MAC) (ACC 2026). Skin perfusion pressure (SPP) <30–40 mmHg similarly predicts poor healing. These thresholds should be used to establish hemodynamic targets for revascularization and to reassess nonhealing wounds after intervention [@conte2019; @acc2026].
Objective perfusion measurements are essential for assessing tissue viability and guiding revascularization in chronic limb-threatening ischemia (CLTI). Toe pressure (TP) <30 mmHg or transcutaneous oxygen tension (TcPO₂) <25–30 mmHg indicates critical ischemia with low likelihood of wound healing without revascularization (Conte 2019)📄. In patients with diabetes, the 2025 ACC scientific statement emphasizes that TP and TcPO₂ are more reliable diagnostic tools than the ankle-brachial index (ABI), which may be falsely elevated due to medial arterial calcification (MAC) (Das 2025). Skin perfusion pressure (SPP) <30–40 mmHg similarly predicts poor healing. These thresholds should be used to establish hemodynamic targets for revascularization and to reassess nonhealing wounds after intervention [@conte2019; @acc2025-h].
Objective perfusion measurements are essential for assessing tissue viability and guiding revascularization in chronic limb-threatening ischemia (CLTI). Toe pressure (TP) <30 mmHg or transcutaneous oxygen tension (TcPO₂) <25–30 mmHg indicates critical ischemia with low likelihood of wound healing without revascularization (Conte 2019)📄. In patients with diabetes, TP and TcPO₂ are more reliable diagnostic tools than the ankle-brachial index (ABI), which may be falsely elevated due to medial arterial calcification (MAC) (ACC 2026). Skin perfusion pressure (SPP) <30–40 mmHg similarly predicts poor healing. These thresholds should be used to establish hemodynamic targets for revascularization and to reassess nonhealing wounds after intervention [@conte2019; @acc2026].