Hybrid Nanoparticle for Co-delivering Paclitaxel and Dihydroartemisinin to Exhibit Synergic Anticancer Therapeutics.

AIM: Anticancer treatment is required to provide effective and safe patient medicines. This research aided in developing and applying nanoparticles (NPs) for cancer treatment. BACKGROUND: The poor solubility of paclitaxel (PTX) restricts its therapeutic efficacy because of allergic side effects caused by formulation excipients. To overcome this, PTX was coupled with artemisinin derivatives and loaded into an NP drug delivery system to enhance its effects while addressing its low solubility. OBJECTIVES: This study prepared and characterized a hybrid PLGA-lecithin NP containing dihydroartemisinin (DHA) and PTX for synergic anticancer therapy. A lyophilization study improved the stability of the NP drug formulations. METHODS: Dual PTX- and DHA-loaded PLGA- and lecithin-based NPs were prepared using a single-step solvent evaporation method. The NP suspensions were lyophilized, and the types and ratios of cryoprotectants were investigated. The physicochemical properties of NPs and lyophilized cakes (Lyo-NPs) were characterized. The stability of the Lyo-NPs was investigated at 2-8°C and room conditions. The anticancer effects of the drug combination, NP suspension, and lyophilized powder were analyzed using an in vitro cytotoxicity assay and an in vivo model. RESULTS: The optimal PTX-DHA loaded PLGA-lecithin-NP was formulated (200 nm, PDI: 0.248 ± 0.003, Zeta potential: -33.60 ± 3.39 mV). Mannitol was selected for lyophilization. Lyo-NPs improved the stability of the NPs (1 year), wherein the physicochemical properties of the NPs were maintained (RDI was close to 1.0). An in-vitro cytotoxicity assay of PTX combined with DHA showed a synergistic anticancer effect (CI <1.0). The suppressive effects of Lyo-NPs on tumor growth in vivo were dose-dependent. While the cocktail of free drugs showed high toxicity (7.5 mg PTX-15 mg DHA/kg) in-vivo, Lyo-NPs showed no statistical differences in hematological and biochemical parameters compared to the control. CONCLUSION: Dual-drug-loaded hybrid PLGA-lecithin NP is a potential system to minimize severe side effects while enhancing antitumor efficacy, in which lyophilization is a key process to increase stability.

Outcomes of Surgical Treatment of Malar Mounds and Festoons.

BACKGROUND: Malar mounds (congenital) and festoons (acquired) are persistent puffiness in the prezygomatic space between the orbicularis retaining ligament (ORL) and zygomatico-cutaneous ligament (ZCL). Non-surgical treatments often yield unsatisfactory results. This paper aims to demonstrate a surgical approach for the treatment of malar bags by outlining the author's surgical technique of treating malar mounds and festoons and reviewing outcomes in 89 cases. METHODS: Correction of malar mounds and festoons was achieved with subciliary skin-muscle flap, release of the ORL and ZCL, midface lift, canthopexy, and muscle suspension. We performed a retrospective study of 89 patients, all of whom had surgical correction of malar mounds or festoons in the past 10 years and a follow-up period of at least 6 months. This study was conducted over the course of the past year and involved reviewing patient charts in the office. Specifically, patient data spanning 2012 to 2022 were analyzed. The predictor variable in this study is the specific class of malar bags the patient has, as determined by the underlying pathophysiology. Outcome variables include the presence or absence of prolonged lid or malar edema, necessary re-excision of excess orbicularis oculi of the subciliary area, lid malposition, permanent visual changes, the need for additional non-operative treatment, and recurrence requiring reoperation. RESULTS: The majority of patients presented with acquired festoons (81/89) with prior attempts of correction (49/89). The mean follow-up is 11.2 months. Persistent malar edema (> 6 weeks) was documented in 14 patients and mainly resolved with Medrol Dosepak (methylprednisolone) and hydrochlorothiazide. A two-proportion Z-test was conducted, comparing the proportion of patients with poor protoplasm who experienced postoperative malar edema to the proportion of those with excellent protoplasm who experienced postoperative malar edema. A p-value of 3.414e-7 was obtained, indicating a statistically significant difference of proportions between the two groups. Five patients received additional injections of deoxycholic acid and two needed fillers for smoother contour of the lower eyelids. Two patients with severe malar mounds required multiple reoperations including direct excision in one patient. One incidence of transient lid retraction was reported in a patient with previous facelift and facial nerve injury. CONCLUSION: Malar mounds and festoons present a unique challenge to plastic surgeons. They are persistent in nature and require close-interval, long-term follow-up as additional injections and reoperations are warranted. Our approach to malar mound and festoon correction is safe and effective and provides long-lasting results. 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 .

Acupuncture Treatment for Breast Cancer-Related Lymphedema: A Randomized Pilot Study.

Background: Methods of conservative management for breast cancer-related lymphedema (BCRL) are burdensome in terms of time, cost, and convenience. In addition, many patients are not candidates for surgical treatment. Preliminary results have demonstrated possible beneficial effects of acupuncture for patients with BCRL. In this small pilot study, we examined the safety and feasibility of an acupuncture randomized control trial (RCT) in this patient cohort, utilizing a battery of standardized clinical and patient-centered outcome measures. Methods and Results: Patients with BCRL were randomized 2:1 to the acupuncture (n = 10) or the control (n = 4) group. Patients received acupuncture to the unaffected extremity biweekly for 6 weeks. Feasibility was defined as enrollment ≥80%, completion of ≥9 of 12 acupuncture sessions per person, and ≥75% completion of three of three measurement visits. To inform a future adequately powered RCT, we describe within-group changes in patient-centered outcomes, including circumferential measurements, bioimpedance spectroscopy, perometry, cytokine levels, and patient quality of life. Adverse events were systematically tracked. Fourteen patients completed the study. Of those who received acupuncture (n = 10), 8 completed all 12 acupuncture sessions, and 2 patients completed 11 sessions. Ninety-three percent of all participants completed all three measurement visits. There was no consistent improvement in arm volumes. Inflammatory marker levels had inconclusive fluctuations among both groups. All patients receiving acupuncture demonstrated an improvement in their functional quality-of-life score. No severe adverse events occurred. Conclusions: A randomized controlled study of acupuncture for BCRL is feasible. The acupuncture intervention is acceptable in this population, without safety concerns in a small sample and warrants further investigation.

A Novel Alginate Film Based on Nanocoating Approach for Enteric-Release Tablets.

The objective of this study was to propose a new coating film for biodegradable polymers and environmentally friendly processing. Here, a novel implementation of solid lipid nanoparticles (SLN) into a biodegradable alginate (ALG) film composition created a new gastric-resistant film for an enteric-release tablet. Experiments were performed on a water-soluble substance (thiamine nitrate) to characterize the effects of SLN upon the addition of the ALG coating formulation. The coated tablets or cast films were characterized based on delayed-release properties, surface morphology, moisture resistance, and chemical interactions. The SLN-ALG film displayed gastric-resistant properties (< 10% drug substance dissolved at pH 1.2) and rapid disintegration in the intestinal medium (pH 6.8). Morphological analysis using a microscope and scanning electron microscope confirmed the uniformity and smoothness of the SLN-ALG film, which improved the mechanical properties of the film. Fourier transform infrared spectroscopy and differential scanning calorimetry indicated that SLN contributed to the formation of the film, which maintained free carboxylic groups, making the SLN-ALG film a higher acid resistance, but soluble in pH 6.8 buffer. These promising results suggest a novel nanotechnology-based coating formulation for various enteric-release dosage forms. Because of their biodegradability, the proposed ingredients and processes are safe and environment-friendly.

Genomic variation associated with cardiovascular disease progression following preeclampsia: a systematic review.

Background: Women with a history of preeclampsia (PE) have been shown to have up to five times the risk of developing later-life cardiovascular disease (CVD). While PE and CVD are known to share clinical and molecular characteristics, there are limited studies investigating their shared genomics (genetics, epigenetics or transcriptomics) variation over time. Therefore, we sought to systematically review the literature to identify longitudinal studies focused on the genomic progression to CVD following PE. Methods: A literature search of primary sources through PubMed, Scopus, Web of Science and Embase via OVID was performed. Studies published from January 1, 1980, to July 28, 2023, that investigated genomics in PE and CVD were eligible for inclusion. Included studies were screened based on Cochrane systematic review guidelines in conjunction with the PRISMA 2020 checklist. Eligible articles were further assessed for quality using the Newcastle-Ottawa scale. Results: A total of 9,231 articles were screened, with 14 studies subjected to quality assessment. Following further evaluation, six studies were included for the final review. All six of these studies were heterogeneous in regard to CVD/risk factor as outcome, gene mapping approach, and in different targeted genes. The associated genes were RGS2, LPA, and AQP3, alongside microRNAs miR-122-5p, miR-126-3p, miR-146a-5p, and miR-206. Additionally, 12 differentially methylated regions potentially linked to later-life CVD following PE were identified. The only common variable across all six studies was the use of a case-control study design. Conclusions: Our results provide critical insight into the heterogeneous nature of genomic studies investigating CVD following PE and highlight the urgent need for longitudinal studies to further investigate the genetic variation underlying the progression to CVD following PE.

Cold avoidance and heat pain hypersensitivity in neuronal nucleoredoxin knockout mice.

Nucleoredoxin is a thioredoxin-like oxidoreductase that mainly acts as oxidase and thereby regulates calcium calmodulin kinase Camk2a, an effector of nitric oxide mediated synaptic potentiation and nociceptive sensitization. We asked here if and how NXN affects thermal sensation and nociception in mice using pan-neuronal NXN deletion driven by Nestin-Cre, and sensory neuron specific deletion driven by Advillin-Cre. In a thermal gradient ring, where mice can freely choose the temperature of well-being, Nestin-NXN-/- mice avoided unpleasant cold temperatures. In neuropathic and inflammatory nociceptive models, Nestin-NXN-/- and Advillin-NXN-/- mice displayed subtle phenotypes of heightened heat nociception. Abnormal thermal in vivo responses were associated with heightened calcium influx upon stimulation of transient receptor channels, with heightened oxygen consumption upon disruption of the mitochondrial membrane potential and with higher density of neurite trees of primary sensory neurons of the dorsal root ganglia in cultures. The data suggest that loss of NXN's balancing redox functions leads to maladaptive changes in sensory neurons that manifest in vivo as polyneuropathy-like abnormal cold sensitivity and heat "pain".

Safety and Efficacy of Third-Generation Ultrasound-Assisted Liposuction: A Series of 261 Cases.

BACKGROUND: The introduction of third-generation ultrasound-assisted liposuction (3rd UAL) allows for a less invasive modality of both deep and superficial lipectomy while offering improved skin retraction and reduced rate of complications. This study examined the efficacy and safety profile of this technology over 15 years of clinical experience. METHODS: A consecutive series of patients treated from 2005-2020 by the senior author were reviewed for demographic and anthropometric measurements, intraoperative settings, surgical outcomes, and complications via retrospective chart review. Body-Q survey was used to assess patient satisfaction. RESULTS: A total of 261 patients underwent 3rd UAL in 783 areas. There were 238 female and 23 male patients with an average age of 43.5 years and BMI of 27.4 kg/m2. The most frequently treated areas were the trunk and lower limbs. An average of 2840 mL of wetting solution was used with an average of 2284 mL of lipocrit aspirate. About 65% of the cases were done in conjunction with another procedure. Overall complication rate was 4.6%, contour irregularity (1.9%), seroma (0.8%), cellulitis (0.8%), pigmentation changes (0.4%), and electrolyte imbalance (0.4%), with a minimum follow-up of 6 months. 78% of patient would undergo the procedure again and 86% would recommend it. CONCLUSION: Third-generation ultrasound-assisted liposuction can be used effectively and safely, either alone, or in conjunction with other plastic surgery procedures. VASER liposuction allows surgeons to address superficial fat plane and enhanced skin tightening. Rate of complications are lower than that of traditional liposuction with equivalent or higher patient satisfaction. 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 .

Addition of "Septal Window" to Lower Blepharoplasty for the Management of Fat of the Lower Eyelids.

BACKGROUND: The most common reason for dissatisfaction and reoperation in lower blepharoplasty patients is persistent bulging of the lateral fat pad. This compartment contributes the most to fat herniation and yet is the most commonly overlooked. The addition of a septal window, a small opening of the septum on the most prominent part of the lateral fat compartment, helps with precise removal of lateral fat and allows for additional fat excision after septal reset without disrupting the arcuate expansion. METHODS: Our lower blepharoplasty approach includes 1) a subcilliary incision; 2) aggressive lateral fat excision through a septal window; 3) central and medial fat excision, transposition, and septal reset; 4) canthopexy; 5) orbicularis oculi muscle suspension; and 6) no dissection of orbicularis oculi medially and no skin resected medially to avoid lid retraction. We performed a retrospective review of all lower blepharoplasty cases by a single surgeon over 10 years. Demographics and operative outcomes were queried. RESULTS: There were 224 cases, 90% were women with a mean age of 58.2 years. The most common postoperative occurrences were eyelid edema, malar edema, and chemosis, all of which were self-limiting. Two patients needed additional removal of lateral fat of their lower eyelids.Two patients had lid retraction, one of which had a previous facial nerve palsy and the other did not have a canthopexy and developed transient unilateral lid retraction that resolved with conservative treatment. Resumption of full activities and exercises at 6 weeks was typical. CONCLUSION: The septal window facilitates aggressive resection of the lateral fat pad and additional fat excision after septal reset to create a smooth lid-cheek junction. In our practice, it is a critical component of a successful lower blepharoplasty.

Reduced exploratory behavior in neuronal nucleoredoxin knockout mice.

Nucleoredoxin is a thioredoxin-like redoxin that has been recognized as redox modulator of WNT signaling. Using a Yeast-2-Hybrid screen, we identified calcium calmodulin kinase 2a, Camk2a, as a prominent prey in a brain library. Camk2a is crucial for nitric oxide dependent processes of neuronal plasticity of learning and memory. Therefore, the present study assessed functions of NXN in neuronal Nestin-NXN-/- deficient mice. The NXN-Camk2a interaction was confirmed by coimmunoprecipitation, and by colocalization in neuropil and dendritic spines. Functionally, Camk2a activity was reduced in NXN deficient neurons and restored with recombinant NXN. Proteomics revealed reduced oxidation in the hippocampus of Nestin-NXN-/- deficient mice, including Camk2a, further synaptic and mitochondrial proteins, and was associated with a reduction of mitochondrial respiration. Nestin-NXN-/- mice were healthy and behaved normally in behavioral tests of anxiety, activity and sociability. They had no cognitive deficits in touchscreen based learning & memory tasks, but omitted more trials showing a lower interest in the reward. They also engaged less in rewarding voluntary wheel running, and in exploratory behavior in IntelliCages. Accuracy was enhanced owing to the loss of exploration. The data suggested that NXN maintained the oxidative state of Camk2a and thereby its activity. In addition, it supported oxidation of other synaptic and mitochondrial proteins, and mitochondrial respiration. The loss of NXN-dependent pro-oxidative functions manifested in a loss of exploratory drive and reduced interest in reward in behaving mice.

Surgical prevention of terminal neuroma and phantom limb pain: a literature review.

The incidence of extremity amputation is estimated at about 200,000 cases annually. Over 25% of patients suffer from terminal neuroma or phantom limb pain (TNPLP), resulting in pain, inability to wear a prosthetic device, and lost work. Once TNPLP develops, there is no definitive cure. Therefore, there has been an emerging focus on TNPLP prevention. We examined the current literature on TNPLP prevention in patients undergoing extremity amputation. A literature review was performed using Ovid Medline, Cochrane Collaboration Library, and Google Scholar to identify all original studies that addressed surgical prophylaxis against TNPLP. The search was conducted using both Medical Subject Headings and free-text using the terms "phantom limb pain," "amputation neuroma," and "surgical prevention of amputation neuroma." Fifteen studies met the inclusion criteria, including six prospective trials, two comprehensive literature reviews, four retrospective chart reviews, and three case series/technique reviews. Five techniques were identified, and each was incorporated into a targetbased classification system. A small but growing body of literature exists regarding the surgical prevention of TNPLP. Targeted muscle reinnervation (TMR), a form of physiologic target reassignment, has the greatest momentum in the academic surgical community, with multiple recent prospective studies demonstrating superior prevention of TNPLP. Neurorrhaphy and transposition with implantation are supported by less robust evidence, but merit future study as alternatives to TMR.

A Multimetric Health Literacy Analysis of Online Information for Gluteal Augmentation With Fat Grafting.

BACKGROUND AND OBJECTIVES: According to the American Society of Plastic Surgeons the number of gluteal augmentations with fat grafting, colloquially known as the "Brazilian buttock lift" (BBL), doubled from 2014 to 2018. Recent studies have demonstrated that gluteal augmentation with fat grafting has a higher mortality rate when compared with other esthetic surgeries. We hypothesize that online patient-directed information for gluteal augmentation are overly complex, written at an elevated reading grade level, with incomplete or no information regarding associated surgical risks. OBJECTIVE: To perform an objective appraisal of the most popular online patient education materials for gluteal augmentation surgery and explore potential interventions for improving material quality. METHODS: An online Google search using the term "Brazilian butt lift" was performed and the top 10 websites providing relevant information were identified. Readability for each website was determined using Readability Studio. Understandability, actionability and cultural sensitivity was assessed with validated tools by 2 independent raters. RESULTS: The top 10 websites were written at a mean reading grade level of 13.0, appropriate for a high school graduate. No website was written at the American Medical Association and the National Institutes of Health recommended 6th to 8th grade reading level. Mean understandability and actionability scores of 51% and 18.9%, respectively, suggest significant room for improvement. The average cultural sensitivity assessment tool score was 2.30, below the recommended threshold for acceptability of 2.5. Ninety percent of all websites did not meet the threshold for cultural acceptability. CONCLUSIONS: Online patient education materials for gluteal augmentation with fat grafting were written at an inappropriately elevated reading grade level and were overly complex, did not promote reader action, and were not sensitive to the needs of the target demographic.

Latest Advances in Wound Debridement Techniques.

The surgical surgical debridement of wounds has evolved over the past 250 years. At that time, the amputation of extremities was recognized as a life-saving procedure to treat major wounds suffered in combat. This continued until after World War I. As the survival of patients with diabetes and other chronic conditions improved, and as advanced therapies were developed to meet the needs of an increasing number of patients with chronic wounds, debridement became a focal point of surgical wound care. It is now well-established that debridement enhances wound-healing and improves the efficacy of advanced therapies and surgical closure. Up until the last two decades, sharp excision with "cold steel" was the only option for debridement. In the early 2000's, a high-power waterjet was introduced, and provided a more precise debridement of wound surfaces. As our understanding of biofilms increased, so came the realization that biofilms are stratified within the wound, with anaerobic species preferentially developing deeper within the wound. The latest surgical instrument for wound debridement, the direct contact low frequency ultrasound device (DCLFU), has recently been introduced. A vacuum sheath was added to the active tip to contain spray dispersion. The device is capable of removing all of the wound tissue including biofilm down to a healthy base. This allows for optimal preparation of the wound prior to deployment of an advanced therapy, graft, or flap. This instrumentation is designed specifically for use in the operating room. However, the manufacturer has recently introduced a less powerful, but still effective, version for use in the outpatient clinic. These advances in surgical debridement technology have paved the way for more effective subsequent interventions for treating chronic wounds.

A Multimetric Health Literacy Analysis of Autologous Versus Implant-Based Breast Reconstruction.

BACKGROUND: Over the past decade, the demand for breast reconstruction has mirrored the rising incidence of breast cancer. Common postoncologic surgical options include autologous and implant-based reconstruction. Patient-directed health information for breast reconstruction can play a critical role in the decision-making process. This study comparatively evaluates the top online resources for autologous versus implant-based reconstruction using a multimetric health literacy analysis. METHODS: The top 10 websites for autologous and implant-based reconstruction were identified using a Google search. A total of 20 unique links were appraised by 2 independent raters for understandability and actionability using the Patient Education Materials Assessment Tool and cultural sensitivity using the Cultural Sensitivity Assessment Tool. A Cohen κ for interrater reliability was calculated. Mean reading grade level and word complexity were also determined. RESULTS: Websites for both autologous and implant-based modalities exceeded the recommended sixth- to eighth-grade reading level (12.4 and 12.1, respectively; P = 0.65). Mean understandability scores for each modality were low (60.5 and 62.5, P = 0.65). Autologous-based resources had a lower mean actionability score compared with implant-based materials (19.5 and 24, respectively; P = 0.04). Both reconstructive modalities met the threshold for acceptability for cultural sensitivity (2.79 and 2.58, P = 0.09). CONCLUSIONS: Our study revealed a chasm between the health literacy needs of the average adult and the quality of both implant-based and autologous breast reconstruction resources. Materials for both modalities were often too complex and failed to include tools to facilitate active decision making, particularly for autologous-based reconstruction. Strategies to improve materials should be patient centered and include simplification of reading grade level, incorporation of clear visual aids, and inclusion of procedural risks to promote patient comprehension, participation, and ultimately health outcomes.

Surgical Approaches and 30-Day Complications of Velopharyngeal Insufficiency Repair Using American College of Surgeons National Surgical Quality Improvement Program-Pediatric.

BACKGROUND: This study aims to outline the 30-d complications of different velopharyngeal insufficiency (VPI) correction techniques using the American College of Surgeons National Surgical Quality Improvement Program-Pediatric. METHODS: Using the American College of Surgeons National Surgical Quality Improvement Program-Pediatric, VPI cases from 2012 to 2015 were identified. Patients were subdivided into two cohorts: (1) palatal procedures and (2) pharyngeal procedures, with the latter being subdivided into (1) pharyngeal flap and (2) sphincter pharyngoplasty. Patient characteristics and postoperative outcomes were compared using Pearson's chi-squared or Fischer's exact test for categorical variables and independent t-tests, Wilcoxon-Mann-Whitney, or analysis of variance for continuous variables. RESULTS: A total of 767 VPI cases were identified: 191 (24.9%) treated with palatal procedures and 576 (75.1%) with pharyngeal procedures, of which 444 were pharyngeal flap and 132 were sphincter pharyngoplasty. Patients who underwent palatal procedure had longer anesthesia (152.41 min) and operating time (105.72 min), whereas patients who underwent pharyngeal procedure had longer length of stay (1.66 d). There were no significant differences in outcomes between the two groups, nor were there significant differences in outcomes between pharyngeal flap and sphincter pharyngoplasty subgroups. Patients who experienced complications were younger, shorter, inpatient, and having a shorter operation time, longer anesthesia time, or longer length of stay. Plastic surgeons performed the majority of palatal procedures (62.3%), whereas pharyngeal procedures were most often performed by otolaryngologists (48.8%). CONCLUSIONS: As per national data, both palatal and pharyngeal procedures for repair can be performed with comparable 30-d complications. The chosen technique may be based on patient presentation and on the surgeon comfort level.

Developing a Lymphatic Surgery Program: A First-Year Review.

BACKGROUND: Lymphedema is a chronic condition that carries a significant physical, psychosocial, and economic burden. The authors' program was established in 2017 with the aims of providing immediate lymphatic reconstruction in high-risk patients undergoing lymphadenectomy and performing delayed lymphatic reconstruction in patients with chronic lymphedema. The purpose of this study was to describe the authors' clinical experience in the first year. METHODS: A retrospective review of our clinical database was performed on all individuals presenting to the authors' institution for lymphatic surgery consideration. Patient demographics, clinical characteristics, and surgical management were reviewed. RESULTS: A total of 142 patients presented for lymphatic surgery evaluation. Patients had a mean age of 54.8 years and an average body mass index of 30.4 kg/m. Patients with lymphedema were more likely to be referred from an outside facility compared to patients seeking immediate lymphatic reconstruction (p < 0.001). For patients with lymphedema, the most common cause was breast cancer related. Thirty-two percent of all patients evaluated underwent a lymphatic procedure. Of these, 32 were immediate lymphatic reconstructions and 13 were delayed lymphatic reconstructions. In the authors' first year, 94 percent of eligible patients presenting for immediate lymphatic reconstruction underwent an intervention versus only 38 percent of eligible lymphedema patients presenting for delayed lymphatic reconstruction (p < 0.001). CONCLUSIONS: First-year review of our lymphatic surgery experience has demonstrated clinical need evidenced by the number of patients and high percentage of outside referrals. As a program develops, lymphatic surgeons should expect to perform more time-sensitive immediate lymphatic reconstructions, as evaluation of chronic lymphedema requires development of a robust team for workup and review.

Surgical outcomes of sternal rigid plate fixation from 2005 to 2016 using the American College of Surgeons-National Surgical Quality Improvement Program database.

BACKGROUND: Sternal rigid plate fixation (RPF) has been adopted in recent years in high-risk cases to reduce complications associated with steel wire cerclage, the traditional approach to sternal closure. While sternal RPF has been associated with lower complication rates than wire cerclage, it has its own complication profile that requires evaluation, necessitating a critical examination from a national perspective. This study will report the outcomes and associated risk factors of sternal RPF using a national database. METHODS: Patients undergoing sternal RPF from 2005 to 2016 in the American College of Surgeons-National Surgical Quality Improvement Program were identified. Demographics, perioperative information, and complication rates were reviewed. Logistic regression analysis was performed to identify risk factors for postoperative complications. RESULTS: There were 381 patient cases of RPF identified. The most common complications included bleeding (28.9%), mechanical ventilation >48 hours (16.5%), and reoperation/readmission (15.2%). Top risk factors for complications included dyspnea (odds ratio [OR], 2.672; P<0.001), nonelective procedure (OR, 2.164; P=0.010), congestive heart failure (OR, 2.152; P=0.048), open wound (OR, 1.977; P=0.024), and operating time (OR, 1.005; P<0.001). CONCLUSIONS: Sternal RPF is associated with increased rates of three primary complications: blood loss requiring transfusion, ventilation >48 hours, and reoperation/readmission, each of which affected over 15% of the study population. Smokers remain at an increased risk for surgical site infection and sternal dehiscence despite RPF's purported benefit to minimize these outcomes. Complications of primary versus delayed sternal RPF are roughly equivalent, but individual patients may perform better with one versus the other based on identified risk factors.

Outcomes in Chest Wall Reconstruction Using Methyl Methacrylate Prostheses: A Review of the Literature and Case Series Utilizing a Novel Approach with Biologic Mesh.

BACKGROUND: Composite defects after chest wall resection may leave patients at risk with lack of protection of vital structures and potentially respiratory compromise secondary to flail segments. Reconstruction of the chest wall with various alloplastic materials is possible and well described. Here, the authors present a novel technique in chest wall reconstruction utilizing a methyl methacrylate (MMA) "sandwich" with biologic mesh. The authors also sought to determine outcomes in chest wall reconstruction with MMA to optimize surgical decision making and minimize patient morbidity. METHODS: A literature review was conducted using MEDLINE and the Cochrane Collaboration Library for primary research articles on chest wall reconstruction using MMA. Data related to surgical techniques and patient outcomes were extracted and analyzed. The authors also present their case series and outcomes utilizing a novel technique with biologic mesh. RESULTS: Seventy-four articles met inclusion criteria, which included a total of 562 patients. Reconstruction methods included three main variations of the MMA prosthesis and six institution-specific variations. Complications were reported in 13.7% of patients; the most common complications included infection (5.6%), respiratory failure (3.3%), and atelectasis (1.7%). Less commonly reported complications included prosthesis dislocation (1.2%), pneumonia (1.0%), and lung collapse (0.4%). Overall mortality due to respiratory causes was observed in nine patients (1.6%). In our case series, complications included respiratory failure and seroma was reported in one patient, with no complications at long-term follow-up. CONCLUSION: There are a variety of options available for rigid and nonrigid prosthetic repair of the chest wall. We present the first successful reported case series of reconstruction using biologic mesh as a component of the MMA sandwich prosthesis. MMA appears to be a safe and effective choice for rigid reconstruction when used alone or in conjunction with synthetic or biologic mesh.

Closed-Incision Negative-Pressure Therapy Efficacy in Abdominal Wall Reconstruction in High-Risk Patients: A Meta-analysis.

BACKGROUND: Obesity is a known risk factor for surgical complications. Closed-incision negative-pressure therapy (ciNPT) has been used anecdotally in high-risk patients to prevent wound complications and infection. This meta-analysis aims to evaluate the efficacy of ciNPT in reducing the incidence of wound complications and infection in abdominal wall reconstruction. METHODS: A literature search using the PubMed/MEDLINE databases (2006-2016) was conducted to identify publications comparing ciNPT to standard incisional care for abdominal wall reconstruction. Outcomes of interest included surgical site infection, wound dehiscence, seroma, hematoma, reoperation, and readmission. Overall rates and associations were pooled. A fixed and random effects model was used upon meta-analysis. Publication bias was assessed using funnel plots. RESULTS: A total of 11 studies met inclusion criteria. There were 1723 patients included, 681 in the ciNPT group, and 1042 in the standard incisional care group. The majority of patients were obese, diabetic, and had a recent history of smoking. On meta-analysis, the risk of surgical site infection decreased by 51% (relative risk: 0.51, 95% confidence interval [0.41-0.63]). The risk of wound dehiscence decreased by 51% (relative risk: 0.51, 95% confidence interval [0.34-0.76]). There was no significant decreased risk observed with ciNPT use for the outcomes of seroma, hematoma, reoperation, and readmission. CONCLUSIONS: The use of ciNPT reduced the incidence of infection and wound dehiscence in patients with varying risk factors undergoing abdominal wall reconstruction. Future prospective randomized clinical trials are still needed to determine the efficacy of ciNPT in plastic surgery.