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Predicting Amputation using Local Circulating Mononuclear Progenitor Cells in Angioplasty-treated Patients with Critical Limb Ischemia
Published on: September 22, 2020
Factors Associated With Early Amputation in Patients With Chronic Limb Threatening Ischemia
Nam Yong Cho1, Zachary Tran2, Syed Shahyan Bakhtiyar3
1Cardiovascular Outcomes Research Laboratories, Division of Cardiac Surgery, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA.
Insights
Early amputation (EA) remains common in chronic limb-threatening ischemia (CLTI) patients. Risk factors for EA include male sex, low income, tissue loss, end-stage renal disease, diabetes, and endovascular procedures.
Area of Science:
- Vascular Surgery
- Health Outcomes Research
Background:
- Chronic limb-threatening ischemia (CLTI) poses significant challenges despite revascularization advancements.
- Early amputation (EA) rates persist, necessitating further investigation into associated risk factors and outcomes.
Purpose of the Study:
- To evaluate clinical outcomes of patients with CLTI.
- To identify factors associated with EA within 90 days of discharge.
Main Methods:
- Analysis of the 2016-2019 Nationwide Readmission Database for adult CLTI patients undergoing limb salvage (LS).
- Primary outcome: EA within 90 days. Secondary outcomes: infectious complications, length of stay (LOS), hospitalization cost, and non-home discharge.
Main Results:
- 10.1% of 103,703 CLTI patients underwent EA within 90 days.
- Risk factors for EA included male sex, low income, tissue loss, end-stage renal disease, and diabetes.
- Endovascular limb salvage was associated with higher odds of EA compared to open revascularization (AOR 1.41).
Conclusions:
- Several modifiable and non-modifiable risk factors are linked to EA in CLTI patients.
- Findings can inform performance goals and enhance institutional limb salvage programs.
Introduction:
Despite advancements in revascularization procedures, early amputation (EA) among patients with chronic limb threatening ischemia (CLTI) are still common. The present study evaluated clinical outcomes of patients with CLTI and factors associated with EA.
Methods:
The 2016-2019 Nationwide Readmission Database was queried to identify all adults (≥18 years) with CLTI of lower extremities undergoing limb salvage (LS) procedures. The primary outcome of the study was EA within 90 days of discharge. Secondary outcomes included infectious complication, length of stay (LOS), cumulative hospitalization cost and non-home discharge.
Results:
Of 103,703 patients who initially underwent surgical or endovascular revascularization, 10,439 (10.1%) subsequently underwent major amputation within 90 days of discharge. Following risk adjustment, factors associated with higher odds of EA were male sex, low-income quartile, tissue loss due to ulceration or gangrene, end-stage renal disease, and diabetes. Compared to those undergoing open revascularization, patients with endovascular limb salvage had a higher likelihood of having early amputation (AOR 1.41, 95% CI 1.31-1.51). Patients undergoing EA had greater odd of infectious complication, incremental LOS, incremental cost and non-home discharge.
Conclusions:
We identified several risk factors to be associated with EA in patients with CLTI. These findings may supplement the objective performance goals for limb-related outcomes and facilitate institutional limb salvage programs.
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