The Role of Glass Stage Compared to WIFI Stage in Predicting Limb Salvage


Assiut University


Not yet enrolling


Chronic Limb-Threatening Ischemia


Device: PTA

Study type


Funder types



Glass Stage and WIFI Stage

Details and patient eligibility


compare between GLASS and WIFI Staging in predicting limb salvage in patients with chronic limb threatening ischemia ( CLTI) undergoing endovascular revascularization.

Full description

Peripheral arterial disease (PAD) is estimated to affect over 200 million people worldwide. These rates are expected to rise as increasing life expectancies continue to shift the population toward older age. At the most severe end of the disease spectrum, chronic limb-threatening ischemia (CLTI) affects 11% of patients with PAD and is associated with high rates of limb loss and mortality as well as high costs of care.(1) The Society for Vascular Surgery's WIfI (Wound, Ischemia, foot Infection) staging system was developed to classify threatened limbs using factors that affect amputation risk and clinical management in patients with chronic limb threatening ischemia . These include the extent of the wound, degree of ischemia, and severity of any foot infection. It has been validated as a predictor of limb salvage in peripheral artery disease.(2,3) The Global Vascular guidelines 'GVG "proposes a new Global Anatomic Staging System (GLASS), which is a new method of quantifying the anatomic severity of infrainguinal disease in patients with chronic limb-threatening ischemia. But it has not been used for predicting limb salvage apart from use as a tool in deciding the mode of intervention for patients with chronic limb-threatening ischemia (CLTI).


28 estimated patients




No Healthy Volunteers

Inclusion criteria


Patients with CLTI who will undergo endovascular revascularization at our department:

• Rutherford stage 4 ( rest pain) ,stage 5 (ischemic ulceration not exceeding ulcer of the digits of the foot) , stage 6 ( severe ischemic ulcers or frank gangrene)

Exclusion criteria

Rutherford stage 1,2,3 Aortoiliac level of occlusion Unsalvageable limb Patients with contraindications to contrast media Non Atherosclerotic lschemia as • Acute ischemia

  • Post Traumatic Ischemia
  • Chronic ischemia caused by connective tissue diseases or vasculitis

Trial contacts and locations



Central trial contact

Mohamed Salah Abdelkareem, Lecturer; Mohamed Ahmed Mohamed, Resident

Data sourced from

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