The use of negative-pressure wound therapy (NPWT) in the temporary treatment of soft-tissue injuries associated with high-energy open tibial shaft fractures.

OBJECTIVES: To evaluate the utility of negative-pressure wound therapy (NPWT) in the setting of high-energy open tibial shaft fractures. DESIGN, SETTING, AND PATIENTS/PARTICIPANTS: This was a retrospective consecutive series in a level 1 university-based trauma center. Forty-nine consecutive patients presenting to a level 1 trauma center between 1996 and 2004 with 50 grade/type III open tibial shaft fractures were assessed. INTERVENTION: The open wounds associated with each fracture were each treated with NPWT before definitive wound closure or coverage. MAIN OUTCOME MEASUREMENTS: Infection rate, need for amputation after attempted definitive coverage, problems with bony healing requiring surgical intervention, reoperation rate after definitive coverage, and the type of definitive coverage required. RESULTS: The overall infection rate for all grade/type III open fractures was 15 of 50 fractures (30%), with 11 of 50 (22%) requiring repeated surgery for infection. The infection rate was 12.5% for grade/type IIIA open fractures, 45.8% for grade/type IIIB, and 50% for grade/type IIIC. Twenty-four of 50 fractures (48%) required subsequent surgery to facilitate fracture healing. Five fractures required amputation after attempted coverage. Seven of 24 fractures initially classified as grade/type IIIA and 10 of 24 fractures initially classified as grade/type IIIB ultimately required free tissue transfer or rotational muscle flap coverage. CONCLUSIONS: Infection and nonunion rates with the use of NPWT for temporary coverage of wounds associated with grade/type III open tibial shaft fractures are similar to those of historical controls, but this technique may be beneficial in decreasing the need for free tissue transfer or rotational muscle flap coverage.

Subatmospheric pressure dressings in the temporary treatment of soft tissue injuries associated with type III open tibial shaft fractures in children.

PURPOSE: This study was designed to evaluate the use of subatmospheric pressure dressings on high-energy open tibial shaft fractures in children. We hypothesized that the use of a negative-pressure dressing in these fractures would result in a decreased incidence of infection and decreased need for pedicled muscle flaps and free tissue transfer. METHODS: A retrospective case series of 15 consecutive pediatric patients with 16 type III open tibial shaft fractures (8 type IIIA, 7 type IIIB, and 1 type IIIC). The patients' age ranged from 2 to 17 years. All patients underwent a standard protocol of serial irrigation and debridement of the open wound with bony stabilization. Temporary coverage of the open wound was obtained with the use of a subatmospheric pressure dressing until definitive wound coverage or closure. RESULTS: Infection occurred in 5 of 16 fractures, 2 requiring antibiotics alone (1 type IIIA and 1 type IIIB) and 3 requiring surgical intervention (2 type IIIB and 1 type IIIC). Seven of 16 (3 type IIIA, 3 type IIIB, and 1 type IIIC) fractures required repeat surgical intervention to facilitate bony healing. Only 3 patients required free tissue transfers or rotational muscle flaps for coverage, a 50% decrease compared with the initial classification. CONCLUSIONS: Compared with other described methods, the use of subatmospheric pressure dressings in the temporary treatment of soft tissue wounds associated with high-energy open tibial shaft may reduce the need for major soft tissue coverage procedures. Its effect on infection and fracture healing rates requires further study. SIGNIFICANCE: A reduction in the need for major soft tissue coverage procedures with the use of negative-pressure dressings in this setting should result in decreased morbidity for these patients and in decreased social and financial costs.

Vacuum-assisted closure: state of basic research and physiologic foundation.

A tremendous amount of research has been conducted in recent years investigating the mechanisms of action by which the application of subatmospheric pressure to wounds increases the rate of healing. Similarly, numerous studies have also been conducted examining the physiologic response of wounds to the applied subatmospheric pressure. However, many more need to be conducted. A series of basic studies examining the use of subatmospheric pressure to treat wounds is presented, including the original studies upon which the vacuum-assisted closure device was based (on blood flow, granulation tissue formation, bacterial clearance, and survival of random-pattern pedicle flaps). Subsequent studies analyzing removed fluids, envenomation/extravasation, burns, grafts, and in vitro tissue culture studies are also reviewed. Two broad mechanisms of action are proposed: removal of fluid and mechanical deformation. Fluid removal both decreases edema--thus decreasing interstitial pressure and shortening distances of diffusion--and removes soluble factors that may affect the healing process (both positively and negatively). The relationship of mechanical deformation to increased growth is well known to plastic surgeons, as it is the basis of tissue expansion. While much has been done, a great deal more needs to be done to elucidate the mechanisms of action responsible for the dramatic response seen clinically.