Thoracic reconstruction with the omentum: indications, complications, and results

Use of the greater omentum for reconstruction of infected sternotomy wounds: a prognostic indicator

INTRODUCTION

Use of the omentum for poststernotomy mediastinitis is typically viewed as a last resort. Formal debridement and muscle flap coverage is sufficient most of the time; however, there are situations when the omental flap is more appropriate. The purpose of this series is to critically evaluate the outcome in those patients who require omental flap reconstruction of poststernotomy mediastinitis.

METHODS

A retrospective review was performed on consecutive patients undergoing omentum flap transposition for poststernotomy mediastinitis from 1990-2005 at Emory University Hospitals. Data points queried included patient demographics, risk factors, type of reconstruction, and outcome. Patient survival was determined at 60 days and 1, 3, and 5 years postomentum reconstruction using the Social Security Death Index. These data points were compared with age- and risk-matched patients from our institution, treated during the same time period with muscle flaps alone.

RESULTS

Fifty-two patients had omental flap reconstruction, with an average age of 61 years (range: 35 to 78). The average follow-up was 5.1 years (range: 1 day to 15 years). Methicillin-resistant Staphylococcus aureus (MRSA) was the most common organism identified at time of omental transfer (56%). The omentum was used either for primary reconstruction, n = 35/52 (67%), or as a salvage procedure following failed muscle flap coverage, n = 17/52 (33%). Complications included donor site 27%, flap related 23%, and general 71% of patients. Those patients undergoing salvage reconstruction had a proportionally greater 60-day mortality (24%) and complication rate. The overall mortality was higher in those patients who required an omental flap transfer when compared with 52 muscle-flap controls (42% versus 18% at 3 years).

DISCUSSION

The greater omentum is still an invaluable tool in the management of mediastinal wound infections when other options have failed or are insufficient. Although reliable and well indicated, the omental flap appears to be a marker for increased mortality, especially when used as a salvage procedure. This association is not directly related to the omental flap but rather to the complexity of the clinical situation leading up to its use. Patients who require omental flap coverage should be counseled and treated appropriately.

Sternotomy wounds: rectus flap versus modified pectoral reconstruction

BACKGROUND

Infected sternotomy wounds occur in 0.5 to 8.4 percent of open heart operations. They are complex problems, with a mortality rate of 8.1 to 14.8 percent despite flap closure. For closure, the pectoralis major flap has had considerable success. However, in providing coverage to the lower third of the sternum, it may be deficient. Modifications to improve closure have included a rectus flap or an anterior rectus fascia extension to the pectoralis flap.

METHODS

This retrospective study of 130 consecutive sternotomy wounds compares 41 bilateral pectoralis major muscle flaps with a modified anterior rectus fascia extension against 56 rectus abdominis muscle flaps alone in addressing the lower third of the sternum following dehiscence.

RESULTS

Pectoralis flaps with rectus fascia extension and rectus flaps have similar success, postoperative course, and morbidity and mortality rates. The pectoralis flaps with rectus fascia extensions prevented superior dehiscence, but this modification does not eliminate dehiscence of the distal third of the sternum.

CONCLUSIONS

The rectus muscle alone proved superior in coverage to the inferior sternum. Sternal wounds should be covered preferentially by a pectoralis flap to cover a superior infection and by a rectus flap if the dehiscence is localized to the distal third.

Sternal wound reconstruction with transverse plate fixation

BACKGROUND

Although sternal wound infections and nonunions affect only a small percentage of patients undergoing median sternotomy, the morbidity, mortality, and expenses associated with them continue to make their treatment of great importance.

METHODS

The authors present a retrospective study of their experience using titanium plates for repair of 50 complicated sternal wounds. The cases reviewed include all cases performed by the primary and secondary authors between the years of 1998 and 2002. Synthes 2.4-mm locking reconstruction plates were used in transverse fixation across the sternum in conjunction with simple bilateral pectoralis advancement flaps for repair of sternal wound dehiscence, osteomyelitis, and nonunion after median sternotomy.

RESULTS

All patients who received treatment were healed. All but one patient went on to complete bony union. Only one case was identified in which a patient developed recurrence of infection around a plate as a late complication 3.5 years later. There were no deaths.

CONCLUSIONS

Transverse plate fixation of the sternum in conjunction with simple bilateral pectoralis advancement flaps is a safe and effective means of treating complicated sternal wounds. The benefits of this procedure over standard muscle flap reconstruction include earlier extubation, a tension-free repair with faster and more reliable healing, and a simpler flap technique without the need for turning the pectoral muscle over or dividing it from its origin. The authors believe that this technique is safe and easy to perform and that it may become the standard for sternal reconstruction in the future.

Poststernotomy mediastinitis: comparison of two treatment modalities

Poststernotomy mediastinitis (PM) is a serious and potentially lethal condition with an overall incidence varying from 0.4-5%. There is little consensus on the ideal management of PM. The aim of this retrospective study was to investigate the effectiveness of topical negative pressure (TNP) therapy vs. traditional closed drainage techniques (CDT) as a treatment modality for PM. We reviewed the data of 10,467 patients who underwent median sternotomy between 1 January 1992 and 31 December 2003. During this period 63 patients were treated for PM. Twenty-nine of these patients were treated with TNP and 34 with conventional CDT. Primary points of interest were: treatment modalities, mortality, surgical site infection recurrence and, duration of therapy and hospital stay. In this series, the total incidence of poststernotomy mediastinitis was 0.6% with high morbidity rates. In the TNP group, lower rates of recurring infection, therapeutic failure and fewer defects at discharge were seen (P<0.05). In conclusion, the results of our series add further data to the knowledge that PM is an important cause of morbidity and mortality. TNP is a safe and adequate treatment modality for treating PM.

[Oncoplastic surgery for thoracic wall tumours]

INTRODUCTION

Surgical treatment of tumours of the chest wall (primary or metastatic) requires special skills by the thoracic and the plastic surgeons, from the functional as well as the aesthetic perspective (oncoplastic surgery), when the treatment requires surgical reconstruction.

MATERIAL AND METHODS

We present a series of 14 patients who needed extensive resection of the thoracic wall (external and/or 3 or more ribs) with disease-free margins and reconstruction with prostheses (7 with polytetrafluoroethylene [PTFE(R)] and 7 with the Sandwich Marlex-Methyl Metacrylate) technique with additional covering with muscle-skin flaps (6 pectoral, 5 recto-anterior, 3 dorsal) pedicled during the same surgical intervention.

RESULTS

The aetiology of the extirpated tumours, following pathology assessment, were: 4 chondrosarcoma, 3 metastatic sternum, 2 breast cancer relapse, 1 desmoid tumour, 1 neurofibrosarcoma, 1 rhabdomiosarcoma, 1 malignant schwannoma and 1 radiation induced sarcoma. One patient died from complications and another 4 from disease progression before the conclusion of the study follow-up (3-22 months).

CONCLUSIONS

Extensive resection of tumours of the chest wall with reconstruction using prostheses and muscle-skin flaps is a safe method that can be performed in the same surgical intervention period when combining the skills of the thoracic surgeon with that of the plastic surgeon.

A reconstructive algorithm for plastic surgery following extensive chest wall resection

Chest wall reconstruction following extensive resection is greatly facilitated by the use of vascularised flaps and prosthetic material. Plastic surgeons are often asked to assist with coverage of large chest wall defects. However, in addition to soft tissue coverage, we need to address other important issues such as the status of the pleural cavity, and the requirement for skeletal support. The purpose of this report is to analyse our experience, provide a reconstructive algorithm following the ablative procedure and review the literature. Two hundred chest wall resections were performed from 1975 to 2000. Defect location was divided into anterior (n = 73) lateral (n = 36) anterior-lateral (n = 36) posterior-lateral (n = 19) posterior (n = 22) and forequarter (n = 14) Average number of ribs resected was four. One hundred and fifty-eight patients (79%) required chest wall reconstruction with either prosthetic material and/or flap closure. Mesh closure was required in 85 cases (43%), being highest for lateral defects (61%), and lowest for anterior defects (31%). Vascularised flaps were needed in 112 patients (56%), more common in anterior defects (79%), and less common for the posterior-lateral defects (26%). Inpatient complication rate was 27% (43/158) following reconstruction, with a mortality of 6% (10/158). Chest wall reconstruction is common following extensive resection. This includes management of the pleural cavity, skeletal support and soft tissue coverage. A better understanding of the respiratory mechanics and local thoracoabdominal anatomy is crucial for managing these complex defects. The need for skeletal support was more prevalent in lateral and posterior-lateral defects. Flap reconstruction was required more often to cover large anterior defects, with regional flaps predominating.

Deep sternal wound infection: a sternal-sparing technique with vacuum-assisted closure therapy

BACKGROUND

Vacuum-assisted closure therapy is a novel treatment employed to aid wound healing in different areas of the body and recently also in sternotomy wounds. Aggressive vacuum-assisted closure treatment of the sternum in postoperative deep wound infection enhances sternal preservation and the rate of possible rewiring.

METHODS

The records of 40 consecutive patients with deep sternal wound infection were reviewed. Sternal bone sparing was achieved by using layers of paraffin gauze (Jelonet; Smith and Nephew Medical, Hull, UK) at the bottom of the wound in order to cover and protect visible parts of the right ventricle, lung tissue, and grafts from the sternal edges. Two separate layers of polyurethane foam (KCI, Copenhagen, Denmark) were placed so as to fit between the sternal edges and subcutaneously. A continuous negative pressure of 125 mm Hg was applied and subsequent revision was made exclusively in nongranulation areas.

RESULTS

There were no deaths during the 90 days of follow-up. Three late deaths unrelated to the infection and three subcutaneous fistulas occurred during the total follow-up period (3 to 41 months). The median duration of the vacuum-assisted closure therapy was 10 days (range, 3 to 34). The series represents a total of 474 days with the vacuum-assisted closure device without serious adverse events.

CONCLUSIONS

In our opinion this modified vacuum-assisted closure therapy is a safe and reproducible option to bridge patients with postoperative deep sternal wound infection to complete healing. Reconstruction of the sternum was achieved in all patients without the use of muscle or omental flap surgery.

The Thoracic Surgical Patient: Initial Postoperative Care

Thoracic surgery patients require complex perioperative care. Accurate preoperative screening of pulmonary conditions can only partially predict the requirement of postoperative mechanical ventilation. In general, extensive lung resections are associated with significant gas exchange abnormalities. In this group of patients, a mechanical ventilation strategy protective from barotrauma and volutrauma and a conservative use of intraoperative and postoperative fluid limit the inevitable increase of extravascular lung water and gas exchange impairment. A wise use of pulmonary vasodilatatory and bronchodilating drugs and airway manipulation including suctioning and bronchoscopy can also significantly affect postoperative respiratory dysfunction and hospital stay. A number of acute postoperative complications have been described specifically related to the type of surgery or pleural space suctioning devices. The role of the intensivist is to maintain a low index of suspicion for such complications, when acute hemodynamic or pulmonary deterioration occurs and be prepared to immediately correct them or alert the thoracic surgeon. In general, when these roles are observed, thoracic surgery can be safely performed with a low perioperative mortality.

Chest wall resections and reconstruction: a 25-year experience

BACKGROUND

Chest wall defects continue to present a complicated treatment scenario for thoracic and reconstructive surgeons. The purpose of this study is to report our 25-year experience with chest wall resections and reconstructions.

METHODS

A retrospective review of 200 patients who had chest wall resections from 1975 to 2000 was performed.

RESULTS

Patient demographics included tobacco abuse, hypertension, diabetes mellitus, alcohol abuse, coronary artery disease, chronic obstructive pulmonary disease, and human immunodeficiency virus. Surgical indications included lung cancer, breast cancer, chest wall tumors, and severe pectus deformities. Twenty-nine patients had radiation necrosis and 31 patients had lung or chest wall infections. The mean number of ribs resected was 4 +/- 2 ribs. Fifty-six patients underwent sternal resections. In addition 14 patients underwent forequarter amputations. Immediate closure was performed in 195 patients whereas delayed closure was performed in 5 patients. Primary repair without the use of reconstructive techniques was possible in 43 patients. Synthetic chest wall reconstruction was performed using Prolene mesh, Marlex mesh, methyl methacrylate sandwich, Vicryl mesh, and polytetrafluoroethylene. Flaps utilized for soft tissue coverage were free flap (17 patients) and pedicled flap (96 patients). Mean postoperative length of stay was 14 +/- 14 days. Mean intensive care unit stay was 5 +/- 9 days. In-hospital and 30-day survival was 93%.

CONCLUSIONS

Chest wall resection with reconstruction utilizing synthetic mesh or local muscle flaps can be performed as a safe, effective one-stage surgical procedure for a variety of major chest wall defects.