Perceived Age and Attractiveness Using Facial Recognition Software in Rhinoplasty Patients: A Proof-of-Concept Study.

ABSTRACT: Artificial intelligence (Al)-based analyses may serve as a more objective tool for measuring cosmetic improvements following aesthetic plastic surgery. This preliminary proof-of-concept study utilized a novel commercial facial recognition software to assess perceived changes in age and attractiveness among patients receiving rhinoplasty.This study was a retrospective evaluation of three-dimensional photographs of patients who underwent rhinoplasty by the senior author (DS). Both pre- and post-operative (> 12-month follow-up) Vectra three-dimensional images (Canfield Scientific, Parsippany, NJ) were assessed using Haystack AI Software (Haystack AI, New York, NY). Facial attractiveness (score 1-10) and apparent age were predicted. A retrospective chart review of demographic variables was additionally performed. Paired t tests were used to compare age and attractiveness scores before and after surgery. Multivariate linear regression was performed to identify factors associated with age and attractiveness scores.One hundred twenty-four patients receiving rhinoplasty met the study criteria (average age: 35.58). Overall, rhinoplasty was associated with increases in Al-rated attractiveness (+0.28, P = 0.03) and decreases in perceived age relative to the patient's true age (-1.03 years, P = 0.03). Greater decreases in postoperative perceived age were achieved in patients who appeared older than their actual age preoperatively ( P < 0.001).Facial recognition software was successfully used to evaluate improvements in perceived age and attractiveness in patients undergoing aesthetic rhinoplasty. Patients were perceived by the software as younger and more attractive following rhinoplasty. Age reversal was greatest among patients who appeared much older than their actual age at the time of surgery.Level of Evidence: IV.

Race-Based Differences in the Utilization and Timing of Secondary Cleft Procedures in the United States.

Primary CL/P repair, revisions, and secondary procedures-cleft rhinoplasty, speech surgery, and alveolar bone grafting (ABG)-performed from 2014-2018 were identified from the Pediatric National Surgical Quality Improvement Program (NSQIP) database. Utilization estimates were derived via univariable and multivariable logistic regression. A Kruskal-Wallis rank-sum test and multivariable linear regression were used to assess differences in timing for each procedure cohort.The primary outcome measures were the odds of a patient being a certain race/ethnicity, and the age at which patients of different race/ethnicity receive surgery.There were 23 780 procedures analyzed. After controlling for sex, diagnosis, and functional status, there were significant differences in utilization estimates across procedure groups. Primarily, utilization was lowest in patient who were Black for cleft rhinoplasty (OR = 0.70, P = .023), ABG (OR = 0.44, P < .001) and speech surgery (OR = 0.57, P = .012), and highest in patients who were Asian patients in all surgery cohorts (OR 2.05-4.43). Timing of surgery also varied by race, although differences were minimal. CONCLUSIONS: Estimates of utilization and timing of secondary cleft procedures varied by race, particularly among patients who were Black (poor utilization) or Asian (high utilization). Further studies should identify the causes and implications of underutilized and/or delayed cleft care.

The Geographic Availability of Certified Cleft Care in the United States: A National Geospatial Analysis of 1-Hour Access to Care.

PURPOSE: Children with cleft lip and/or palate (CLP) require longitudinal multidisciplinary care. Travel distance to comprehensive cleft centers may be a barrier for some families. This study evaluated the geospatial availability of certified cleft teams across the United States. MATERIALS AND METHODS: A geographic catchment area within a 1-hour travel radius of each American Cleft Palate-Craniofacial Association-certified cleft center was mapped using TravelTime distance matrix programming. The proportion of children located within each catchment area was calculated using county-level data from the National Kids Count Data Center, with aggregate estimates of patients with CLP based on state-level data from the Centers for Disease Control and Prevention. One-hour access was compared across regions and based on urbanization data collected from the US Census. RESULTS: There were 182 American Cleft Palate-Craniofacial Association-certified centers identified. As per study estimates, 28,331 (27.3%) children with CLP did not live within 1-hour travel distance to any center. One-hour access was highest in the Northeast (84.2% of children, P < .001) and lowest in the South (65.7%) and higher in states with the greatest urbanization in comparison with more rural states (85.1 vs 37.4%, P < .001). Similar patterns were seen for access to 2 or more cleft centers. The number of CLP children-per-center was highest in the West (775) and lowest in the Northeast (452). CONCLUSIONS: Travel distances of more than 1 hour may affect more than 25,000 (1 of 4) CLP children in the US, with significant variation across geographic regions. Future studies should seek to understand the impact of and provide strategies for overcoming geographic barriers.

Primary Cleft Palate Repair Among Older-Age Children and Adolescents in the United States.

PURPOSE: Older age cleft palate (CP) repair in international settings has been associated with increased surgical morbidity. This study assesses the prevalence and risks associated with late-age CP repair (age > 5 years) in the United States. METHODS: Primary CP repair patients less than the age of 18 years were identified in the National Surgical Quality Improvement pediatric database from 2012 to 2018. Total postoperative complications, readmissions, reoperations, duration of surgery, and length of stay were recorded. T-tests and χ2 analyses were used to compare variables between age groups 0-5, 6-10, and 11-17. RESULTS: A total of 10,022 primary CP procedures were identified from 2012 to 2018, of which 868 (8.6%) received repair at age > 5 years. Hispanic patients constituted a larger proportion of CP repair from ages 11 to 17 years than repair at other ages (P < .001). In comparison with children treated from ages 0 to 5 years, children operated on between ages 6 and 10 or 11 and 17 years experienced no increases in unplanned readmissions, reoperations, or complication rates after surgery. Patients of ages 6-10 years and 11-17 years had decreased operating room time (P < .001) compared with younger patients. Patients of ages 11-17 years also had decreased hospital length of stay (P = .04). CONCLUSIONS: Many children in the United States received primary CP repair after the age of 5 years likely due to late treatment of submucosal clefts or delayed care among international immigrants/adoptees. Old age procedures were not associated with increased short-term surgical morbidity in comparison with surgery at earlier time points. The causes and implications of older age primary surgery warrant further study.

Risk Factors for Lymphedema After Breast Conservation Therapy and Oncoplastic Reduction.

BACKGROUND: Lymphedema is a known complication after the surgical management of breast cancer, yet the incidence is poorly defined after breast conserving therapy and oncoplastic reduction. The primary aim of this study was to define lymphedema incidence in this population. Furthermore, we sought to correlate demographic factors, surgical approach, and complementary treatment modalities with incidence. METHODS: Data were collected retrospectively on patients who underwent breast conserving therapy at our institution from 2012 to 2015 with greater than 1 year of follow-up. Patients were excluded if they underwent breast surgery before treatment, completion mastectomy, delayed breast reconstruction, or delayed breast reduction. RESULTS: Five hundred and eighty-four patients met study criteria with a 11% lymphedema rate. Patients developing lymphedema had higher preoperative body mass index (P = 0.02), larger breast mass resection volume (P < 0.01), higher rate of axillary dissection (P < 0.01), increased rate of adjuvant whole-breast radiation (P = 0.03), supraclavicular radiation (P < 0.01), axillary radiation (P < 0.01), and neoadjuvant medical therapy (P < 0.01). Multivariate analysis showed breast specimen mass, axillary radiation, and neoadjuvant medical therapy, which were associated with lymphedema (P < 0.05). There was no difference in lymphedema incidence between partial mastectomy and oncoplastic reduction cohorts with independent multivariate analyses for each showing axillary radiation and neoadjuvant medical therapy were significantly associated with lymphedema (P < 0.05), although breast specimen mass was not. CONCLUSIONS: Elevated preoperative body mass index, radiation, axillary dissection, and neoadjuvant medical therapy are associated with an increased risk of lymphedema after breast conserving surgery. Oncoplastic reconstruction is not a risk factor for lymphedema.

Crushed Cartilage and Autologous Fat for Dorsal Nasal Refinement.

BACKGROUND: Dorsal contour irregularities remain a potential undesirable sequela of rhinoplasty. Use of dorsal onlay grafts can camouflage such irregularities. In this article, a novel technique for dorsal onlay grafting utilizing crushed cartilage mixed with autologous fat is described. This study aims to assess long-term graft retention and aesthetic outcomes with this technique. METHODS: Patients with >18-month follow-up who underwent primary open rhinoplasty with the described technique were reviewed. Three-dimensional photographs taken at multiple timepoints were overlaid with volumetric subtraction used to quantify graft retention. The Rhinoplasty module of the FACE-Q was completed by each patient, and the Rhinoplasty Assessment Scale Photographic (RASP) was completed by surgeon reviewers. Pre- and postoperative changes in dorsal height as well as RASP scores were compared with paired t-tests. Changes in BMI, dorsal volume, and dorsal height were compared with linear regression. P values <0.05 were considered significant. RESULTS: Fourteen patients were included, mean age 32. Mean intermediate and final follow-up was 17.8 months and 28.9 months, respectively. There were no statistically significant dorsal height change (mean = 0.0 mm, p = 0.91) and minimal dorsal volume change (mean = 0.02 cm3, range:  0.08 to 0.13). Patients reported a high degree of satisfaction with facial/nasal appearance and psychological/social functioning. There was a statistically significant improvement in RASP scores (p < 0.001) postoperatively. CONCLUSION: Crushed septal cartilage mixed with autologous fat is an effective option for dorsal nasal onlay in rhinoplasty and is associated with excellent graft retention, patient satisfaction, and nasal aesthetics. LEVEL OF EVIDENCE IV: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266.

Rhinoplasty in the Older Adult.

BACKGROUND: Rhinoplasty in older adults requires unique consideration of the aging nose. OBJECTIVES: The purpose of this study was to systematically review the literature pertaining to rhinoplasty in the aging population, review the senior author's experience, and describe techniques aimed at addressing age-related features. It was hypothesized that consistent age-related nasal dysmorphology is described in the literature and standard rhinoplasty techniques may effectively address these changes. Furthermore, it was hypothesized that rhinoplasty is more commonly performed for posttraumatic and functional indications than for aesthetic reasons. METHODS: A literature review including publications describing rhinoplasty in patients over 55 years old was conducted. Additionally, a retrospective review of the senior author's cases was performed. Pre- and postoperative photographs were used to compare anthropometric changes. Demographic factors, surgical indications, and operative details were collected. RESULTS: Nine articles met the study criteria. Manifestations of the aging nose included soft tissue atrophy, bony fragility and resorption, tip ptosis, internal and external valve collapse, and worsening dorsal hump. Twenty-seven patients were included in this institutional review. Primary indication for rhinoplasty was posttraumatic deformity in 17 (63%) patients and nasal obstructive symptoms in 10 (37%) patients. Tip refinement and ptosis were addressed through tip grafts (70%), columellar struts (26%), and caudal septal extension grafts (67%). Nasal obstruction was relieved through septoplasty (96%), turbinate ablation (85%), and spreader grafts (70%). CONCLUSIONS: This study presents a systematic review of rhinoplasty in the older adult as well as a retrospective review of the senior author's patients. Unique considerations specific to this population should be integrated into treatment planning.

Transverse Infraclavicular Approach to the Thoracoacromial Pedicle for Microsurgical Breast Reconstruction.

BACKGROUND: In microvascular breast reconstruction, the internal mammary and thoracodorsal vessels are commonly used recipients. However, these vessels are sometimes compromised or unavailable. We hypothesize that a transverse infraclavicular (TIC) incision may provide efficient and reliable exposure to perform free flap anastomosis to the thoracoacromial (TAC) vessels for breast reconstruction. METHODS: The authors present their results from a cadaveric feasibility study and a retrospective case series of 4 consecutive breast reconstruction patients in which the TIC-TAC approach was used. RESULTS: The cadaveric dissection demonstrated a 5.5-cm pedicle length and a 3.75-mm diameter on the left side. On the right, the pedicle measured 5 cm in length and 4 mm in diameter. The dissection time was 10 minutes on the left side and 13 minutes on the right side. Five free flap breast reconstructions were performed in 4 patients using the TIC approach to the TAC artery which served as the primary recipient. The average pedicle length was 6.25 cm with a diameter of 3.55 mm. The pedicle was isolated and delivered through the infraclavicular incision in an average of 16.3 minutes on the left (n = 2) and 12.6 minutes on the right (n = 3). There were no complications, such as flap compromise or reoperation. CONCLUSIONS: The TIC-TAC approach is feasible for microvascular breast reconstruction and can be considered for use by microvascular breast surgeons.

Preventing Breast Implant Contamination in Breast Reconstruction: A National Survey of Current Practice.

BACKGROUND: Implant-based breast reconstruction is commonly performed by plastic surgeons worldwide. Bacterial contamination is of paramount concern because of its role in biofilm formation and capsular contracture. Plastic surgeons have adopted a variety of perioperative interventions in efforts to reduce implant contamination; however, definitive evidence supporting these practices is lacking. OBJECTIVE: The goal of this study was to assess current practice patterns aimed at reducing implant-related infections. METHODS: A 20-question survey assessing practices aimed at preventing breast implant-associated infections was generated and distributed via SurveyMonkey to members of the American Society of Plastic Surgery whose e-mail addresses were listed on the American Society of Plastic Surgery member Web site in April 2015. RESULTS: A total of 1979 invitations to participate in the survey were sent, and 253 responses were received during the 4-month study period. Of respondents, 81% were in private practice. Respondents averaged 21 ± 9 years in practice, and 34 ± 50 implant-based breast reconstructions were performed per year. A majority of surgeons used chlorhexidine to prepare the surgical site (52%), a triple antibiotic soak for the implant prior to placement (50%) and povidone-iodine for implant pocket irrigation (44%). A no-touch technique utilizing the Keller funnel was adopted by 69% of surgeons. Regarding antibiotic use in the postoperative period, first-generation cephalosporins (eg, cephalexin, cefadroxil) were used by a majority of surgeons (84%), and the most common duration was until drain removal (45%). CONCLUSIONS: There is considerable heterogeneity in surgical practices aimed at preventing bacterial contamination in implant-based breast reconstruction. Surgeons may benefit from high-level studies designed to create standardized evidence-based practice guidelines.

Antimicrobial Prophylaxis Practice Patterns in Breast Augmentation: A National Survey of Current Practice.

BACKGROUND: Breast augmentation is one of the most commonly performed aesthetic surgery procedures worldwide. Bacterial contamination is of paramount concern due to its role in biofilm formation and capsular contracture. Plastic surgeons have adopted a variety of perioperative interventions in efforts to reduce implant contamination, however definitive evidence supporting these practices is lacking. OBJECTIVE: The goal of this study was to assess current practice patterns aimed at reducing implant-related infections in breast augmentation and comparing them to current evidence-based medicine recommendations. METHODS: A 20-question survey assessing practices aimed at preventing breast implant associated infections was generated and distributed via SurveyMonkey to members of the American Society of Plastic Surgery whose electronic mail addresses were listed on the American Society of Plastic Surgery member website in April 2015. RESULTS: A total of 253 responses were received from the survey. Of the respondents, 81% were in private practice. Respondents averaged 21 ± 9 years in practice, and 69 ± 111 breast augmentations performed per year. A majority of surgeons used Chlorhexidine to prepare the surgical site (45%) and triple antibiotic solution both as a soak for the implant before placement (40%) as well as for implant pocket irrigation (47%). A no-touch technique using the Keller Funnel was adopted by 42% of surgeons. Regarding antibiotic use in the postoperative period, first-generation cephalosporins were used by the majority of respondents (79%), and the most common duration was for 4 to 6 days (45%). CONCLUSIONS: Although there is heterogeneity in specific aspects of antimicrobial prophylaxis during breast augmentation, there is a clear trend toward practice modification geared towards preventing bacterial contamination in breast augmentation. Surgeons may benefit from high-level studies designed to create standardized evidence-based practice guidelines.

Use of negative pressure wound therapy on malignant wounds - a case report and review of literature.

The presence of malignancy is considered a contraindication to the use of negative pressure wound therapy (NPWT) because of concerns that it may promote tumourigenesis and expedite metastasis. This notion is extrapolated from studies evaluating NPWT in normal tissues. Despite the absence of direct evidence, the use of this technology in malignant wounds is widely considered a contraindication. We present the case of a patient with treatment-resistant metastatic colon cancer, who developed a chronic abdominal wound with positive margins. A staged reconstruction using NPWT was performed and wound closure allowed the patient to meet eligibility criteria and enrol in a clinical trial for treatment of his oncological disease. Skin closure remained intact until the patient expired 6 months after the wound closure. This case, as well as others in the literature, demonstrated that the use of NPWT should not be considered an absolute contraindication in malignancy. Individualised approaches taking into account the patient's clinical scenario, the available evidence, as well as the risks and benefits of this technology are recommended.

Porcine Acellular Dermal Matrix for Hernia Repair in Transplant Patients.

PURPOSE: The purpose of this study was to compare clinical outcomes of incisional hernia repair in solid organ transplant patients using non-cross-linked porcine acellular dermal matrix (PADM), human derived acellular dermal matrix (HADM) and synthetic mesh. METHODS: A retrospective review of patients who underwent hernia repair with PADM after pancreas and/or renal transplant at the University of Maryland Medical Center from 2008 to 2012 was conducted. Repair type, postoperative infection, hernia recurrence, mesh removal, and length of follow-up were recorded. Results were compared with our previously published data evaluating HADM and synthetic mesh used in transplant patients between 2000 and 2005. RESULTS: Twenty-seven patients underwent ventral hernia repair with PADM, 34 patients were repaired with HADM and 26 were repaired with synthetic mesh. The rate of wound infection in those repaired with PADM, HADM, and synthetic mesh were 14.8%, 14.7%, and 65.4%, respectively. Rates of recurrence were 13.3%, 23.5%, and 76.9%, respectively. Rate of mesh removal was found to be 7.4%, 11.8%, and 69.2%, respectively. These complication rates were significantly lower in patients who received HADM or PADM compared with patients repaired with synthetic mesh (P < 0.001). There was no statistically significant difference in the outcomes between the groups repaired with HADM or PADM. CONCLUSIONS: The use of PADM for incisional hernia repair after kidney and/or pancreas transplant significantly reduces the incidence of hernia recurrence, wound infection, and need for mesh removal compared to synthetic mesh. No difference in morbidity between HADM and PADM was observed in the study population; however, longer follow-up in the PADM group is warranted.

Techniques to Repair Implant Malposition after Breast Augmentation: A Review.

BACKGROUND: Implant malposition is a complication of breast augmentation that adversely affects aesthetic outcomes. It is one of the most common reasons for revisionary aesthetic breast surgery yet there is a lack of peer reviewed literature dedicated to the management of this complication. OBJECTIVES: The purpose of this article was to summarize the malposition literature, review the types and causes of this complication, and evaluate the strengths and weakness of procedures aimed at addressing it. METHODS: A review of the literature was performed using the PubMed database. Articles describing surgical techniques for correction of implant malposition, as well as outcome data for patients undergoing revision with described techniques, were included. Articles describing revisionary surgery following breast reconstruction were excluded. A series of cases are presented to illustrate techniques discussed. RESULTS: Search criteria resulted in 763 articles. Title and abstract review followed by application of inclusion and exclusion criteria resulted in a total of 21 clinical studies from 1988 to 2014 that were included in this review. All studies included in this study were of level IV or V evidence. CONCLUSIONS: Despite the overall low level of evidence in the literature regarding secondary breast augmentation, a thorough understanding of the corrective techniques presented will allow surgeons to make the most informed judgments. Weighing the strengths and weakness of these surgical techniques in the context of each patient will allow surgeons to develop the most appropriate treatment strategy. LEVEL OF EVIDENCE 4: Therapeutic.

Porcine acellular dermal matrix (PADM) vascularises after exposure in open necrotic wounds seen after complex hernia repair.

Biological alternatives to synthetic meshes are increasingly utilised in complex abdominal wall reconstruction. There is a lack of evidence demonstrating that non-cross-linked porcine acellular dermal matrix vascularizes and integrates with human tissue in suboptimal wound conditions. We aimed to evaluate these properties in Strattice™ (Life Cell Inc., Branchburg, NJ) following ventral hernia repair. A retrospective review of patients with high-risk ventral hernia repair utilising Strattice™ as an onlay after open component separation was conducted. Patients with postoperative wound exploration and exposure of the onlay were included in this review. One patient underwent punch biopsy for histological analysis. Eleven patients with wound complications necessitating postoperative debridement and exposure of Strattice™ onlay were identified. The onlay was partially debrided in two cases, and one case required complete excision. Vascularisation was clinically evident in 10 of 11 cases (91%) as demonstrated by the presence of granulation tissue and/or the ability to support a skin graft. Histological analysis of one onlay 3 months postoperatively showed neovascularisation and collagen remodelling with minimal inflammatory response. Strattice™ demonstrated resistance to rejection, ability to undergo vascularisation and incorporation into host tissues in sub-optimal wound conditions following ventral hernia repair.

Modified Pedicled Internal Mammary Osteomyocutaneous Chimeric Flap for Salvage of Mandibular Reconstruction.

The modified pedicled internal mammary osteomyocutaneous chimeric flap is a powerful option for head and neck reconstruction in patients not suitable for free tissue transfer. In this article, the senior author's (K.C.) technique for flap elevation is described in the context of a patient with mandibular osteoradionecrosis resulting in severe crossbite and trismus after multiple failed attempts at reconstruction with free tissue transfer. The modified pedicled internal mammary osteomyocutaneous chimeric flap was chosen as it offered intraoral lining, extraoral soft tissue, and vascularized bone for mandibular reconstruction without requiring free tissue transfer. The flap dissection as well as the risks, benefits, and indications for this flap are described herein. The modified pedicled internal mammary osteomyocutaneous chimeric flap is a technically complex reconstructive option reserved for situations in which conventional methods have been exhausted. It offers an eloquent solution for patients who otherwise may have no options.

The Effect of Surgical Timing on 30-Day Outcomes in Cleft Palate Repair.

BACKGROUND: The optimal age for cleft palate repair continues to be debated, with little discussion of surgical risk related to operative timing. This study of 3088 cleft palate patients analyzed the impact of surgical timing on perioperative and 30-day postoperative outcomes. METHODS: Primary cleft palate repairs were identified in the National Surgical Quality Improvement Program database from 2012 to 2015. Data were combed for total postoperative complications, rates of readmission and reoperation, operating room time, and length of stay. Bivariate analyses were performed comparing 3-month periods from months 6 to 18, and months 0 to 5, 18 to 23, 24 to 29, and 30 to 59. RESULTS: Despite a higher proportion of isolated soft palate closure, children operated on before 6 months had a higher complication rate than children at other ages (7.1 percent versus 3.2 percent; OR, 2.4; p = 0.04), and higher rates of both readmission (3.6 percent versus 1.4 percent; OR, 3.6; p = 0.02) and reoperation (2.4 percent versus 0.5 percent; OR, 4.7; p = 0.04). There were no differences in short-term outcomes for any other age group younger than 5 years, and no differences in hospital length of stay among any age groups. CONCLUSIONS: The authors' findings suggest a relative contraindication to operation before 6 months. As there were no differences between any other age groups, long-term speech optimization should continue to be the primary consideration for operative planning. These findings improve the current rationale for palatoplasty timing, and can aid surgeons and parents in the surgical decision-making process. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.

Resolution of Vertical Gaze Following a Delayed Presentation of Orbital Floor Fracture With Inferior Rectus Entrapment: The Contributions of Charles E. Iliff and Joseph S. Gruss in Orbital Surgery.

INTRODUCTION: Orbital floor fractures occur commonly as a result of blunt trauma to the face and periorbital region. Orbital floor fractures with a "trapdoor" component allow both herniation and incarceration of contents through a bone defect into the maxillary sinus as the bone rebounds faster than the soft tissue, trapping muscle, fat, and fascia in the fracture site. In children, the fractured floor, which is often hinged on one side, tends to return toward its original anatomical position due to the incomplete nature of the fracture and elasticity of the bone. The entrapment of the inferior rectus muscle itself is considered a true surgical emergency-prolonged entrapment frequently leads to muscle ischemia and necrosis leading to permanent limitation of extraocular motility and difficult to correct diplopia. For this reason, prompt surgical intervention is recommended by most surgeons. In adults, true entrapment of the muscle itself is not as common because the orbital floor is not as elastic and fractures are more complete. METHODS: We present an adult patient with an isolated orbital floor fracture with clinical and radiologic evidence of true entrapment of the inferior rectus muscle itself. RESULTS: Despite the delayed surgical repair (4 days after the injury), the patient's inferior rectus muscle function returned to near normal with mild upward gaze diplopia. CONCLUSIONS: Inferior rectus entrapment in adults may more likely be associated with immobilization of the muscle without total vascular compression/incarceration significant enough to lead to complete ischemic necrosis.

The Efficacy of Breast Implant Irrigant Solutions: A Comparative Analysis Using an In Vitro Model.

BACKGROUND: Infections are challenging complications of implant-based breast reconstruction and augmentation. They pose a clinical challenge, with significant economic implications. One proposed solution is implant irrigation at the time of placement. There is no consensus on the optimal irrigant solution. METHODS: The authors tested the relative efficacy of 10% povidone-iodine, Clorpactin, Prontosan, triple-antibiotic solution, or normal saline (negative control) against two strains each of methicillin-resistant Staphylococcus aureus and Staphylococcus epidermidis. Sterile, smooth silicone implant disks were immersed in irrigant solution, then incubated in suspensions of methicillin-resistant S. aureus or S. epidermidis overnight. The disks were rinsed and sonicated to displace adherent bacteria from the implant surface, and the displaced bacteria were quantified. Normalized values were calculated to characterize the relative efficacy of each irrigant. RESULTS: Povidone-iodine resulted in reductions of the bacterial load by a factor of 10 to 10 for all strains. Prontosan-treated smooth breast implant disks had a 10-fold reduction in bacterial counts for all but one methicillin-resistant S. aureus strain. In comparison to Prontosan, triple-antibiotic solution demonstrated a trend of greater reduction in methicillin-resistant S. aureus bacterial load and weaker activity against S. epidermidis strains. Clorpactin reduced the recovered colony-forming units for only a single strain of S. epidermidis. Povidone-iodine demonstrated the greatest efficacy against all four strains. However, Clorpactin, triple-antibiotic solution, and Prontosan demonstrated similar efficacies. CONCLUSIONS: Povidone-iodine was the most efficacious of the irrigants at reducing methicillin-resistant S. aureus and S. epidermidis contamination. Given the recent lifting of the U.S. Food and Drug Administration moratorium, larger clinical studies of povidone-iodine as a breast implant irrigant solution are warranted. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, V.

The Effect of Negative Pressure Wound Therapy With Antiseptic Instillation on Biofilm Formation in a Porcine Model of Infected Spinal Instrumentation.

OBJECTIVE: This study evaluates the effect of negative pressure wound therapy with antiseptic instillation (NPWTi) in the clearance of infection and biofilm formation in an in vivo model of infected spinal implants compared to traditional treatment modalities. MATERIALS AND METHODS: Five pigs underwent titanium rod implantation of their spinous processes followed by injection of 1 x 106 CFUs/100µL of methicillin-resistant Staphylococcus aureus through the fascia at each site. At 1 week postoperatively, an experimental arm of 3 pigs received NPWTi, and a control arm of 2 pigs received wet-to-dry dressings. The persistence of local infection in the experimental group was compared to the control group using tissue cultures. Biofilm development on spinal implants was evaluated using scanning electron microscopy. RESULTS: Mean bacterial count showed a statistical difference between the experimental and the control groups (P < .05). Scanning electron microscopy revealed the presence of uniform biofilm formation across the surface of control group instrumentation, whereas the experimental group showed interrupted areas between biofilm formations. CONCLUSION: The authors concluded that NPWTi is associated with decreased bacterial load and biofilm formation compared to wet-to-dry dressings in an in vivo porcine model of infected spinal instrumentation.