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Published on: May 2, 2025
825
Variables Associated with Treatment Failure after Negative Pressure Wound Therapy in Poststernotomy Mediastinitis: A
Christoph Schimmer1, Christina Heinowski2, Khaled Hamouda1
1Department of Cardiothoracic and Thoracic Vascular Surgery, University Hospital Würzburg, Würzburg, Germany.
The Thoracic and Cardiovascular Surgeon
|October 30, 2025
Summary
Treatment failure in poststernotomy mediastinitis (PSM) patients using negative pressure wound therapy (NPWT) is linked to higher BMI and diabetes. Frequent sponge changes indicate more complex infections, not increased risk.
Area of Science:
- Cardiovascular Surgery
- Infectious Diseases
- Wound Management
Background:
- Poststernotomy mediastinitis (PSM) is a severe complication following cardiac surgery.
- Negative Pressure Wound Therapy (NPWT) is a common treatment for PSM.
- Identifying factors for NPWT failure is crucial for improving patient outcomes.
Purpose of the Study:
- To investigate factors associated with treatment failure in PSM patients undergoing NPWT.
- To identify patient characteristics and treatment parameters that predict NPWT success or failure.
Main Methods:
- A retrospective case-control study involving 198 cardiac surgery patients with PSM treated with NPWT.
- Patients were divided into successful NPWT (n=117) and failure (n=81) groups.
- Statistical analysis identified significant predictors of NPWT failure.
Main Results:
- Obesity (BMI >30 kg/m²) and diabetes mellitus (DM) were significantly associated with NPWT failure (OR 1.07 and 1.94, respectively).
- A higher number of sponge changes correlated with NPWT failure (OR 1.57), indicating more complex infections.
- Mortality was higher in the NPWT failure group (12.7%) compared to the success group (0.9%).
Conclusions:
- Elevated BMI and diabetes mellitus are key risk factors for NPWT failure in PSM.
- Frequent sponge changes suggest underlying resistant infections, necessitating expert management.
- Experienced cardiac surgeons and specialized centers can optimize NPWT duration and outcomes.
