Contemporary outcomes in no-option chronic limb-threatening ischemia

Area of Science:

• Vascular Surgery
• Cardiology
• Public Health

Background:

• Chronic limb-threatening ischemia (CLTI) is a severe form of peripheral artery disease with increasing incidence.
• A significant subset of CLTI patients are classified as "no-option," facing high risks of limb loss and mortality, particularly in underrepresented groups.
• Current treatment paradigms offer limited options for these complex patients, necessitating research into novel interventions.

Purpose of the Study:

• To evaluate contemporary, real-world outcomes for patients with no-option chronic limb-threatening ischemia.
• To assess the 1-year amputation-free survival rate in this high-risk patient cohort.
• To identify the rates of major/minor amputation, mortality, and functional status post-intervention.

Main Methods:

• An observational study involving 180 patients diagnosed with no-option CLTI across 22 US centers.
• The primary endpoint was defined as amputation-free survival at 1 year, encompassing freedom from death and above-ankle amputation.
• Data collected included patient demographics, comorbidities (diabetes, heart failure, end-stage renal disease), and clinical outcomes.

Main Results:

• The 1-year amputation-free survival rate was 37%.
• Major amputation occurred in 45% of patients, and 33% died within the study year.
• Among survivors, two-thirds had persistent non-healing ulcers, 44% underwent minor amputation, and 83% required ambulatory assistance.

Conclusions:

• Patients with no-option CLTI face devastating outcomes, with approximately half undergoing major amputation and one-third dying within one year.
• The high rates of amputation, mortality, and persistent morbidity highlight a critical unmet need for innovative limb salvage strategies.
• Further research and development of novel therapeutic interventions are urgently required to improve outcomes for this vulnerable patient population.