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Eur J Cardiothorac Surg 2002;21:74-78
© 2002 Elsevier Science NL

Mediastinal reinforcement after induction therapy and pneumonectomy: comparison of intercostal muscle versus diaphragm flaps

^a Division of Thoracic Surgery, University Hospital, Bern, Switzerland
^b Department of Surgery, University Hospital, Lausanne, Switzerland

Received 23 January 2001; received in revised form 24 October 2001; accepted 29 October 2001.

* Corresponding author. Department of Surgery, Division of Thoracic Surgery, University Hospital of Zurich, CH 8091 Zurich, Switzerland. Tel.: +41-1-255-8802; fax: +41-1-255-8805
e-mail: didier.lardinois{at}chi.usz.ch

Objective: Prospective non-randomised comparison of full-thickness pedicled diaphragm flap with intercostal muscle flap in terms of morbidity and efficiency for bronchial stump coverage after induction therapy followed by pneumonectomy for non-small cell lung cancer (NSCLC). Methods: Between 1996 and 1998, a consecutive series of 26 patients underwent pneumonectomy following induction therapy. Half of the patients underwent mediastinal reinforcement by use of a pedicled intercostal muscle flap (IF) and half of the patients by use of a pedicled full-thickness diaphragm muscle flap (DF). Patients in both groups were matched according to age, gender, side of pneumonectomy and stage of NSCLC. Postoperative morbidity and mortality were recorded. Six months follow-up including physical examination and pulmonary function testing was performed to examine the incidence of bronchial stump fistulae, gastro-esophageal disorders or chest wall complaints. Results: There was no 30-day mortality in both groups. Complications were observed in one of 13 patients after IF and five of 13 after DF including pneumonia in two (one IF and one DF), visceral herniations in three (DF) and bronchopleural fistula in one patient (DF). There were no symptoms of gastro-esophageal reflux disease (GERD). Postoperative pulmonary function testing revealed no significant differences between the two groups. Conclusions: Pedicled intercostal and diaphragmatic muscle flaps are both valuable and effective tools for prophylactic mediastinal reinforcement following induction therapy and pneumonectomy. In our series of patients, IF seemed to be associated with a smaller operation-related morbidity than DF, although the difference was not significant. Pedicled full-thickness diaphragmatic flaps may be indicated after induction therapy and extended pneumonectomy with pericardial resection in order to cover the stump and close the pericardial defect since they do not adversely influence pulmonary function.

Key Words: Diaphragm • Intercostal muscle • Flap • Pneumonectomy • Induction therapy • Lung cancer

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