Which of the following is a listed co-morbidity factor that indicates tibio-pedal access?

• A. Inability to lie supine for extended periods due to dementia or back pain
• B. Vessel size and body size as anatomical factors
• C. Infected groin
• D. Compromised pulmonary function

Answer: (D)

When deciding where to access the vessel for an endovascular procedure, clinicians weigh patient comorbidities to minimize risk. If pulmonary function is compromised, the safer path is often tibio-pedal access because it can be performed under local anesthesia with minimal respiratory depression, avoiding the deeper sedation or general anesthesia that can worsen breathing. This approach reduces respiratory risk while still achieving the needed reach to treat lower-extremity disease.

Infected groin would steer away from femoral access due to infection risk, making pedal access more favorable for that reason. Vessel size and body habitus are more about anatomical feasibility than a systemic comorbidity, and inability to lie supine is a positioning/comfort issue rather than the direct respiratory-risk reduction that makes pedal access advantageous in the setting of poor pulmonary function.