Manubrium-limited sternotomy decreases blood loss after aortic valve replacement surgery.

OBJECTIVES: Minimally invasive surgical approaches for aortic valve replacement (AVR) are growing in popularity in an attempt to decrease morbidity from conventional surgery. We have adopted a technique that divides only the manubrium and spares the body of the sternum. We sought to determine whether patients benefit from this less-invasive approach. METHODS: We retrospectively analysed our prospectively maintained database to review all isolated aortic valve replacements performed in an 18-month period from November 2011 to April 2013. RESULTS: One hundred and ninety-one patients were identified, 98 underwent manubrium-limited sternotomy (Mini-AVR) and 93 had a conventional median sternotomy (AVR). The two groups were well matched for preoperative variables and risk (mean logistic EuroSCORE mini-AVR 7.15 vs AVR 6.55, P = 0.47). Mean cardiopulmonary bypass and aortic cross-clamp times were 10 and 6 min longer, respectively, in the mini-AVR group (mean values 88 vs 78 min, P = 0.00040, and 66 vs 60 min, P = 0.0078, respectively). Mini-AVR patients had significantly less postoperative blood loss, 332 vs 513 ml, P = 0.00021, and were less likely to require blood products (fresh-frozen plasma and platelets), 24 vs 36%, P = 0.042. Postoperative complications and length of stay were similar (discharge on or before Day 4; mini-AVR 15 vs AVR 8%, P = 0.17). Valve outcome (paravalvular leak mini-AVR 2 vs AVR 1%, P = 1.00) and survival (mini-AVR 99 vs AVR 97%, P = 0.36) were equal. CONCLUSIONS: A manubrium-limited approach maintains outcomes achieved for aortic valve replacement by conventional sternotomy while significantly reducing postoperative blood loss and transfusion of blood products.

Does body mass index (BMI) affect cost in cardiac surgery? 'A pound (pound) for pound (lb) analysis'.

The effect of BMI on cost of intensive care unit (ICU) stay and ward stay in cardiac surgery is currently unknown. To assess these data on BMI, ICU stay and EuroSCORE were prospectively collected for 6100 patients undergoing cardiac surgery between 2000 and 2004. Patients were categorised according to BMI and comparisons were conducted, using non-parametric tests (Kruskal-Wallis and Mann-Whitney U-tests). One day in ICU was costed at pound1,300 and one ward-day pound300/day by this hospital's finance department. Despite similar median (due to a distribution skewed to a short ICU stay), a significant difference is observed between all 6 groups (Kruskal-Wallis; P<0.001) for ICU stay and ward stay. Underweight and morbidly obese patients had longer ICU stays compared with the ideal weight patients (P=0.010 and P=0.004, respectively); while overweight and obese patients had shorter ICU stays (P<0.001 and P=0.007, respectively). Underweight patients had a longer ward stay than ideal weight patients (P=0.005) but there was no difference between ideal and morbidly obese patients (P=0.789). These results demonstrate that BMI has a significant impact on ICU and ward stay with 'ideal weight' not always being ideal for patients undergoing cardiac surgery. This cost appears to be independent of EuroSCORE.