With increasingly complex spine surgeries now being performed on a more comorbid patient population, the reconstruction of midline back wounds from these procedures is becoming a frequent dilemma encountered by plastic surgery. The purpose of this study is to examine the effect of various preoperative risk factors on postoperative wound healing complications after paraspinous muscle flap reconstruction of midline back defects. An Institutional Review Board-approved, 11-year, retrospective, office and hospital chart review was conducted. All adult patients who underwent paraspinous muscle flap reconstruction during the study period were included. There were 92 patients in the study, representing the largest reported series to-date for the paraspinous muscle flap procedure. Mean follow-up was 120 days. Several wound-healing risk factors were present in this patient population: 72% were malnourished, 41% had hypertension, 37% were obese, 34% had a history of smoking, 32% had diabetes, 16% were on chronic steroids, 14% had a history of more than 2 previous spine surgeries, and 9% had a history of radiation to the wound area. Factors significantly (P < 0.05) associated with postreconstruction wound complications included history of traumatic spine injury, prereconstruction hardware removal, a history of more than 2 spine surgeries, hypertension, and lumbar wound location. This patient population possesses multiple comorbidities making complex wound healing difficult. Several specific risk factors are associated with an increased rate of postreconstruction wound complications after paraspinous muscle flaps. The paraspinous muscle flap remains an important tool for spinal wound reconstruction in the reconstructive surgeon's armamentarium.

In the present study we have examined the effect of dexamethasone on ob gene mRNA expression and leptin release from isolated human subcutaneous adipocytes. Dexamethasone stimulated leptin release from cultured adipocytes in a time- and dose-dependent manner. A two-fold increase in leptin release was detectable by 36 h of treatment with 10(-7) M dexamethasone. Leptin release was preceded by a significant 83 +/- 30% increase in ob mRNA after 24 h exposure to the compound. Co-incubation of cells with dexamethasone (10(-7) M) and insulin (10(-7) or 10(-9) M) completely blocked the dexamethasone-stimulated increase in ob mRNA and leptin release. These data demonstrate that insulin and glucocorticoids regulate leptin synthesis and release from human adipocytes in vitro.

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Definitive repair of recurrent ventral hernias using abdominal wall reconstruction techniques is an essential tool in the armentarium for general and plastic surgeons. Despite the great morbidity associated with incisional hernia, no consensus exists on the best means for treatment (Korenkov et al, Langenbecks Arch Surg. 2001;386:65-73). Ramirez et al (Plast Reconstr Surg. 1990;83:519-526) describes the "component separation" technique to mobilize the rectus-abdominus internal oblique and external oblique flap to correct the defect. This retrospective institutional study reviewed 10 years of myofascial flap reconstruction from 1996 to 2006 at Thomas Jefferson University Hospital and revealed an 18.3% recurrence rate in 545 component separations. We identified obesity (body mass index >30 kg/m2), age >65 years old, male gender, postoperative seroma, and preoperative infection as risk factors for hernia recurrence.

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