Table 12.4.

Major outcome measures for chronic limb-threatening ischemia (CLTI) and amputation prevention

Quality assurance measure	Calculation
Limb salvage rate	No. of total patients – No. of major amputations (BKA or AKA) No. of total patients
Major to minor amputation ratio	No. of major amputations performed (BKA or AKA) No. of limb-sparing amputations performed
Healing percentage, all wounds	No. of wounds healed Total No. of wounds – palliative care patients
Healing percentage, DFUs	No. of DFUs healed Total No. of DFUs – palliative care patients
Median days to heal, all wounds	Calculate days to heal for all wounds. Exclude amputated and palliative care patients.
Median days to heal, DFUs	Calculate days to heal for all DFUs. Exclude amputated and palliative care patients.
Noninvasive vascular study, DFUs	No. of NIVSs performed No. of new DFU patients
Revascularization success, open bypass	No. of open bypass patients – No. of open bypass failures No. of open bypass patients
Revascularization success, endovascular	No. of endovascular patients – No. of endovascular failures No. of endovascular patients

AKA, Above-knee amputation; BKA, below-knee amputation; DFUs, diabetic foot ulcers; NIVSs, noninvasive vascular studies.

Palliative care patients are defined as those in whom healing is not the treatment goal, that is, terminal or hospice patients.