GLASS Classification for Infrainguinal Arterial Disease

When it activates

Scribeable activates a calculator from the encounter. The GLASS Classification for Infrainguinal Arterial Disease can activate when the transcript or pasted chart context documents any of these:

• Peripheral arterial disease classification
• Infrainguinal revascularization planning
• CLTI anatomic assessment
• Femoropopliteal disease grading
• Infrapopliteal disease grading

Inputs the note needs

2 inputs. Each is resolved from the transcript, the pasted chart context and charted labs; at this calculator’s tier a missing input is never requested, and a missing required input keeps the score out of the draft.

Scoring

Femoropopliteal (FP) Grade: 1=mild (short focal stenosis/occlusion), 2=intermediate (longer lesions, moderate complexity), 3=severe (long CTO, heavily calcified, diffuse disease). Infrapopliteal (IP) Grade: 1=mild (limited disease, good runoff), 2=intermediate (moderate disease, some runoff compromise), 3=severe (extensive multivessel disease, poor runoff). Combined grading determines estimated limb-based patency (ELLA) stage.

Interpretation

FP1/IP1: Low complexity — good outcomes with endovascular or surgical revascularization. FP2/IP2: Intermediate — outcomes depend on technique selection and operator experience. FP3/IP3: High complexity — lower patency rates, higher reintervention rates, may favor bypass over endovascular in suitable candidates. Combined with clinical staging (Rutherford/WIfI) for complete CLTI management planning. GLASS predicts technical success and patency — complement with wound, ischemia, and foot infection staging for amputation risk. Integrates with GVG (Global Vascular Guidelines) framework for CLTI.

Evidence

Sources carried in Scribeable's citation registry for this calculator; guideline version: Conte 2019.

• Conte MS et al. Global Vascular Guidelines on the management of chronic limb-threatening ischemia (GVG/GLASS)Conte et al. (GLASS) 2019 · 2019 · SVS/ESVS/WFVS · Consensus · link last verified 2026-03-28

How Scribeable handles it in the note

When an encounter activates the GLASS Classification for Infrainguinal Arterial Disease (its highest tier is recommended), Scribeable does not ask you for missing inputs. The score is computed in code from whatever inputs resolve from the transcript, the pasted chart context or charted labs; a computed value is written into the draft only when every required input already resolves.

The score is computed in code from the resolved inputs, not recalled by the language model. A stated GLASS Classification for Infrainguinal Arterial Disease value is compared against the computed one when the draft's structured summary carries it; a disagreement found there is flagged to the second drafting pass, which is instructed to correct the score and its interpretation, unless Scribeable has supplied the computed value to that pass, in which case the value the draft writes is checked against the supplied one and a detected difference is shown beside the note for you to adjudicate rather than silently rewritten.

Classified as a staging or classification system: activated strictly, because a wrong stage on the wrong patient is a documentation hazard.

Related calculators

• Ankle-Brachial Index (ABI)Diagnoses and quantifies severity of peripheral artery disease by comparing ankle and brachial systolic pressures
• Fontaine Classification for PADStages peripheral arterial disease severity using clinical presentation
• Rutherford Classification for PADClassifies severity of peripheral arterial disease for treatment planning
• SVS WIfI ClassificationStratifies threatened limbs by wound, ischemia, and foot infection severity for amputation risk estimation
• University of Texas Classification for Diabetic Foot WoundsClassifies diabetic foot ulcers by depth and presence of infection/ischemia to predict healing outcomes and guide management
• Wagner Classification for Diabetic Foot UlcersGrades diabetic foot ulcer severity to guide wound care and surgical decision-making

Can activate in: Cardiology, Vascular Surgery, Podiatry, Radiology & Interventional Radiology.