Navin K. Singh

Recipient Vessel Analysis for Microvascular Reconstruction of the Head and Neck

The selection of recipient vessels that are suitable for microvascular anastomosis in the head and neck region is one of many components that is essential for successful free tissue transfer. The purpose of this study was to evaluate a set of factors that are related to the recipient artery and vein and to determine how these factors influence flap survival. A retrospective review of 102 patients over a 5-year consecutive period was completed. Indications for microvascular reconstruction included tumor ablation (n = 76), trauma (n = 13), and chronic wounds or facial paralysis (n = 13). The most frequently used recipient artery and vein included the facial, superficial temporal, superior thyroid, carotid, and jugular. Various factors that were related to the recipient vessels were analyzed and included patient age, recipient artery and vein, diabetes mellitus, tobacco use, the timing of reconstruction, the method of anastomosis, previous radiation therapy, creation of an arteriovenous loop, and use of an interposition vein graft. Successful free tissue transfer was obtained in 97 of 102 flaps (95%). Flap failure was the result of venous thrombosis in 4 and arterial thrombosis in 1. Statistical analysis demonstrated that anastomotic failure was associated with an arteriovenous loop (2 of 5, P = 0.03) and tobacco use (3 of 5, P = 0.03). Flap failure was not related to patient age, choice of recipient vessel, diabetes mellitus, previous irradiation, the method of arterial or venous anastomosis, use of an interposition vein graft, or the timing of reconstruction.

Recalcitrant abdominal wall hernias: long-term superiority of autologous tissue repair.

Secondary repair of recurrent ventral hernia is difficult, and success depends on re-establishing the functional integrity of the abdominal wall. Current techniques used for closure of these defects have documented recurrence rates as high as 54 percent. The authors’ 8-year experience utilizing variations of the components separation technique for autologous tissue repair of recalcitrant hernias emphasizes that recurrent or recalcitrant hernias benefit from the creation of a dynamic abdominal wall. A total of 389 patients were retrospectively identified as having abdominal wall defects, and 284 of these patients met the selection criteria. Study patients were grouped according to the type of surgical repair used. The recurrence rate was 20.7 percent over all study groups and was directly related to the extent of repair required. Group 1 patients (wide tissue undermining) had a recurrence rate of only 15 percent, while in group 2 (complete components separation), the recurrence rate was 22 percent. Group 3 patients (interpositional fascia lata graft) had a 29 percent recurrence rate. Time to recurrence was also significantly different across treatment groups, with study group 3 experiencing earlier hernia recurrence. The most frequent postoperative complication was wound infection, which was directly related to the repair performed. The relative odds of recurrence versus the risk factors of age, sex, perioperative steroid use, wound infection, defect size, and the presence of enterocutaneous fistula were studied with a logistic regression analysis. These factors did not possess statistical significance for predicting hernia recurrence. The preoperative presence of mesh was independently significant for hernia recurrence, increasing the relative odds 2.2 times (p = 0.01). Similarly, when other risk factors were controlled for, increasing the complexity of the treatment group, from study group 1 (wide tissue undermining) to study group 3 (interpositional fascia lata graft), also increased the odds of hernia recurrence 1.5-fold per group (p = 0.04). Average inpatient cost was

Multilevel analysis of the impact of community vs patient factors on access to immediate breast reconstruction following mastectomy in Maryland.

24,488. The length of inpatient stay ranged from 2 to 172 days (average, 12.8 days). The length of inpatient stay and costs were directly related to the extent of repair required. Using the analysis of variance test for multiple factors, the presence of an enterocutaneous fistula (p = 0.0014) or a postoperative wound infection (p = 0.008) independently increased the length of inpatient stay and hospital costs. A total of 108 successfully repaired patients were contacted by telephone and agreed to participate in a self-reported satisfaction survey. The patients noticed improvements in the appearance of their abdomen, in their postoperative emotional state, and in their ability to lift objects, arise from a chair or a bed, and exercise. These results suggest that recalcitrant hernia defects should be solved, when possible, by reconstructing a dynamic abdominal wall.

Nipple-areola complex sensitivity after primary breast augmentation : A comparison of periareolar and inframammary incision approaches

OBJECTIVE To determine whether various individual factors such as patient demographics and various community factors such as characteristics of the neighborhood in which the patient lives would influence access to immediate breast reconstruction. DESIGN Multilevel analysis of the Maryland Hospital Discharge Database, a prospectively collected observational database of inpatient care for all hospitals in Maryland. SETTING Database analysis. PATIENTS We queried for International Classification of Diseases, Ninth Revision procedure codes for all patients undergoing mastectomy and reconstruction during the same hospitalization in Maryland from January 1, 1995, through December 31, 2004. MAIN OUTCOME MEASURES Disparities in immediate reconstruction rates via analysis of the impact of patient-level and community-level factors. RESULTS A total of 18 690 patients underwent mastectomy in Maryland during the study period, 27.9% of whom had immediate reconstruction. On multivariate analysis, patient factors such as African American race/ethnicity and older age had a negative association. Community factors such as increasing household income, increasing population density, and increasing proportion of the community with at least some college education had a positive association, while increasing home value and increasing African American composition of the patients neighborhood had a negative association. The impacts of ethnic/racial mix and educational level of the patients neighborhood were independent of the patients race/ethnicity. CONCLUSIONS Community factors beyond patient characteristics have a significant association with immediate reconstruction. Prospective community-level public health policy measures should be developed to address these inequalities (particularly racial/ethnic disparities based on neighborhood) and to increase the likelihood of obtaining immediate reconstruction.

The emerging role of antineoplastic agents in the treatment of keloids and hypertrophic scars: a review.

Background: The body of literature documenting normative breast sensation and postoperative changes in sensation after reduction mammaplasty has grown considerably over the last several years. Despite this, only two studies have ever been published on the subject of postaugmentation mammaplasty sensory outcomes. The purpose of this study was to precisely measure sensory thresholds at the nipple-areola complex in women who have undergone augmentation mammaplasty by either the inframammary or periareolar approach. Methods: Twenty women underwent primary augmentation mammaplasty by either the periareolar or inframammary approach at an average follow-up of 1.12 years. Sensory testing was performed using the Pressure-Specified Sensory Device by comparing moving and static sensory thresholds at the upper and lower areola and nipple. Nine women served as size-matched, nonoperated controls in the study. Results: Primary augmentation mammaplasty was found to have a statistically significant negative effect on sensory outcomes when nonoperated controls were compared with women who had undergone augmentation mammaplasty via either the periareolar or inframammary approach. No differences in sensory outcomes were found between the two approaches used. Implant volume was found to be highly predictive of sensory outcomes, with an inverse relationship between implant size and the degree of sensitivity within the nipple-areola complex. Conclusions: Plastic surgeons should feel comfortable counseling patients that augmentation mammaplasty by either the inframammary or periareolar approach results in no discernible differences in sensory outcomes. Furthermore, women who choose very large implants relative to their breast skin envelopes should be warned about potential adverse sensory sequelae within the nipple-areola complex.

Microsurgical Reconstruction of Posttraumatic High-Energy Maxillary Defects : Establishing the Effectiveness of Early Reconstruction

The management of keloids and hypertrophic scars continues to challenge health-care providers. Though both forms of pathologic scarring are distinct entities at the macro and microscopic level, their etiologies and treatment are often similar. Potential treatment approaches are progressing, and combinations of treatment options have been proposed in the literature with promising outcomes. The treatment evolution has reached a level where molecular therapeutic modalities are being investigated. Currently, no gold standard treatment exists. Overall success rates and patient satisfaction seem to be slowly climbing, but additional investigational studies must continue to be performed. Several studies have investigated antineoplastic agents, and there seems to be a marked improvement in rates of recurrence, patient satisfaction, and overall quality of scar when these agents are used. Intralesional injection and/or wound irrigation with interferon-a2b, interferon-g, mitomycin-C, bleomycin, or 5-fluorouracil seems to have a positive effect on the reduction of pathologic scars. There is mounting evidence that these drugs used alone or in combination therapy, have the potential to be an integral part of the treatment paradigm for hypertrophic scars and keloids.

Classification schema for anatomic variations of the inferior epigastric vasculature evaluated by abdominal CT angiograms for breast reconstruction

Background: Posttraumatic, high-energy defects of the midface can be challenging to reconstruct because they involve extensive composite tissue loss and result in significant permanent functional and cosmetic deformity. These injuries require replacement of the bony framework, external soft tissue, and intraoral mucosa. Local skin flaps and nonvascularized bone grafts have been used for reconstruction, but bony resorption and the associated soft-tissue collapse limit long-term viability. The authors present a classification of maxillary defects following high-energy trauma and a treatment algorithm using vascularized bone flaps. Methods: Fourteen patients with significant maxillary loss from high-energy trauma underwent reconstruction with composite vascularized bone flaps. Eight patients had fibula flaps and six had iliac crest flaps. There were five women and nine men, with a mean age of 36.3 years (range, 21 to 48 years) and a mean follow-up of 18 months (range, 5 to 54 months). Results: Thirteen of the 14 flaps survived. Nine patients had additional procedures. Nine patients had oronasal fistulas and eight were dependent on gastrostomy tubes preoperatively. All patients were able to feed orally without nasal regurgitation postoperatively. All patients achieved stable restoration of the midfacial architecture. Conclusions: The classification scheme presented centers on the missing maxillary subunits. The reconstructive algorithm is based on the type of defect, tissue requirement, and donor tissues necessary to restore facial projection and prosthodontic rehabilitation. Iliac crest and fibula bone free flaps are ideal for restoring a variety of traumatic maxillary defects. The authors advocate early reconstructive intervention using vascularized bone flaps to achieve superior functional and cosmetic outcomes.

Comparison Study of Nipple-Areolar Sensation After Reduction Mammaplasty

Background. Many studies demonstrate direct patient benefits from use of preoperative computed tomography angiograms (CTA) for abdominal tissue‐based breast reconstruction. We present a novel classification schema to translate imaging results into further clinical relevance. Methods. Each hemiabdomen CTA was classified into a schema that addressed findings of expected anatomy, anatomy that necessitates a change in operative technique and anatomy that suggests less morbid procedures may be considered. Results. Eighty‐six patients (172 hemiabdomens) were available for study. Of the reconstructions performed in this time period, 40 (47%) were bilateral and 46 (53%) unilateral. Based on perforator size and location, relative perimuscular anatomy, and continuity of vessels, five categories were defined: type I “Traditional” anatomy (n = 150, 87%), type II “Highly Favorable” anatomy (n = 11, 6.4%), type III “Altered‐Superiorly Translocated” anatomy (n = 9, 5.2%), type IV “Superficial Dominant” anatomy (n = 26, 15%), and type V “Hostile” anatomy (n = 4, 2.3%). The additive total is greater than 100%, because vessels may fall into more than one category. Discussion. In providing the microsurgeon with a preoperative vascular map that has the potential to influence the preoperative, operative, and postoperative course, abdominal CTAs should be considered a worthy adjunct to the diagnostic armamentarium of the reconstructive surgeon. These classifications and their clinical impacts become even more important in centers performing increasing numbers of bilateral reconstructions. We believe that our simple schema can facilitate effective use of this powerful tool, aiding in overall care of the breast reconstruction patient.

Does fascia lata repair facilitate closure and does it affect compartment pressures of the anterolateral thigh flap donor site

BACKGROUND Although many techniques of reduction mammaplasty are currently in use, a prospective study quantitating the sensation of the nipple-areolar complex (NAC) after the performance of specific techniques has not been performed. OBJECTIVE The purpose of this study was to quantitate the postoperative sensation of the NAC after reduction mammaplasty and to compare the results on the basis of the orientation of the vascularized pedicle. METHODS We tested 42 patients divided into 4 groups: medial pedicle (9 patients), inferior pedicle (8 patients), free nipple transfer (8 patients), and a control group (17 patients). The specific mammaplasty technique chosen was based on the preoperative assessment and the estimated volume of resection. A Wise pattern approach was used in all cases. NAC sensation was quantified with the use of the Pressure Specified Sensory Device (Sensory Management Services LLC, Baltimore, MD). RESULTS We detected no significant difference in the volume of reduction between the free nipple group and the medial pedicle group (P =.14). NAC sensation in the free nipple transfer group was significantly lower than either of the pedicle techniques and control group in all areas of testing (P < 0.001), whereas the medial and inferior pedicle groups had no significant sensory differences in NAC sensation (P < 0.001). CONCLUSIONS The medial pedicle technique is safe and reliable and can be used for large-volume reduction mammaplasty to optimize sensation of the NAC.

Infection after augmentation gluteoplasty in a pregnant patient.

The reliability and versatility of the anterolateral thigh flap has been established; however, reducing donor-site morbidity continues to be a focus. The major donor-site difficulties reported include wound complications related to primary closure (i.e., wound dehiscence, muscle bulge, need for skin grafting) and mild lower extremity weakness.1–3 Techniques to further decrease donor-site morbidity would further enhance appeal of the anterolateral thigh flap. Primary fascial closure or imbrication may decrease tension on the skin repair and allow primary closure of larger defects; however, its effect on compartment pressures has not yet been documented. We sought to demonstrate that primary closure or imbrication of the fascia lata following anterolateral thigh flap harvest could be performed safely and predictably, achieving higher rates of primary skin closure.