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Limb salvage and selectivity
Insights
This study shows that specific pressure measurements can predict the success of limb salvage surgery for advanced atherosclerosis. These findings aid in selecting patients for combined extra-anatomic bypass and profundoplasty procedures.
Area of Science:
- Vascular Surgery
- Cardiovascular Medicine
- Surgical Outcomes
Background:
- Advanced atherosclerosis in aortoiliac and femoropopliteal segments poses challenges for limb salvage.
- Poor-risk patients often require complex surgical interventions.
Observation:
- A combined procedure of extra-anatomic bypass with extended profundoplasty was employed for limb salvage.
- Clinical and angiographic factors alone were insufficient for predicting surgical success.
Findings:
- Successful limb salvage was achieved in poor-risk patients with advanced atherosclerosis.
- Two key measurements predicted success: aortoiliac differential pressure (deltaP) and outflow bed response to papaverine.
- Significant differences in deltaP (89.3 vs. 33.2 mmHg) and papaverine-induced outflow drop (36.3% vs. 11.3%) were observed between successful and failed cases.
Implications:
- These simple hemodynamic measurements can guide patient selection for complex limb salvage procedures.
- The findings facilitate a more accurate approach to treating ischemic limbs in high-risk populations.
- Improved patient selection may lead to better outcomes in vascular reconstructive surgery.
Abstract:
In a group of properly prepared poor risk patients with advanced atherosclerosis of both the aortoiliac and femoropopliteal segments, a combined procedure, extra-anatomic bypass with an extended profundoplasty, was used for successful salvage of their ischemic--mean calf pressure=27 millimeters of mercury--limbs. Prediction of success versus failure could be determined on neither clinical nor angiographic-anatomic grounds but was possible using two simple measurements: a large aortoiliac differential pressure--deltaP--between inflow pressure obtained from a standard arm cuff and outflow pressure measured directly from the femoral artery, 89.3 millimeters of mercury versus 33.2 millimeters of mercury, p less than 0.001, and a potentially adequate outflow bed as determined by the percentage drop in outflow [(deltaPo/Po) per cent] upon papaverine injection, 36.3 versus 11.3 per cent, p less than 0.001. These values became an important part of the selection scheme developed in the approach to 24 ischemic limbs.