Does ministernotomy improve postoperative outcome in aortic valve operation? A prospective randomized study.
BACKGROUND
The aim of this study was to compare the postoperative outcome obtained in patients undergoing elective aortic valve operation, either through ministernotomy or conventional sternotomy.


METHODS
Between January 1999 and July 2001, 80 consecutive patients undergoing elective aortic valve replacement were randomly divided into two groups: group I (n = 40 patients) undergoing a ministernotomy approach (reversed-C or reversed-L), and group II (n = 40 patients) undergoing conventional sternotomy.


RESULTS
The length of skin incision was significantly shorter in group I than in group II (8.2+/-1.3 cm versus 23.7+/-2.6 cm, p < 0.001). No significant differences were found in cardiopulmonary bypass duration, associated procedures, or aortic cross-clamping times. Total operating time was 3.7+/-0.46 hours in group I compared with 3.4+/-0.6 hours in group II (p = 0.014). A similar incidence of cardiac, neurologic, infective, and renal complications between groups was found. Mean mediastinal drainage and mean blood transfusions (amount of blood transfused) per patient were greater in group II (p < 0.004 and p < 0.001, respectively). Twenty-five (62.5%) patients in group II and 15 (37.5%) patients in group I required postoperative blood transfusion (p = 0.04). Mechanical ventilation time was significantly longer in group II (6.2+/-1.8 hours versus 4.4+/-0.9 hours, p = 0.006). Five days after the surgical procedure, spirometric data analysis demonstrated a significantly lower total lung capacity and maximum inspiratory and expiratory pressures in group II compared with group I (p = 0.003, p = 0.007, and p < 0.001, respectively).


CONCLUSIONS
Our results showed that ministernotomy had not only important cosmetic advantages but also beneficial effects in blood loss and transfusion, postoperative pain, and probably in sternal stability. Ministernotomy also improved recovery of respiratory function and allowed earlier extubation and hospital discharge.
Bonacchi
Massimo
M
Department of Cardiac Surgery, University of Florence, Italy. mbonacchi@hotmail.com
Prifti
Edvin
E
Giunti
Gabriele
G
Frati
Giacomo
G
Sani
Guido
G
D000368:Aged; D001021:Aortic Valve / Q000601:surgery*; D001022:Aortic Valve Insufficiency / Q000401:mortality / Q000601:surgery*; D001024:Aortic Valve Stenosis / Q000401:mortality / Q000601:surgery*; D016063:Blood Loss, Surgical / Q000517:prevention & control; D005260:Female; D006801:Humans; D008176:Lung Volume Measurements; D008297:Male; D008875:Middle Aged; D019060:Minimally Invasive Surgical Procedures; D011183:Postoperative Complications / Q000209:etiology* / Q000401:mortality; D011446:Prospective Studies; D013249:Sternum / Q000601:surgery*; D016019:Survival Analysis