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1.
Transplant Proc ; 53(2): 730-736, 2021 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-33541717

RESUMO

INTRODUCTION: Abdominal organ transplant is a life-saving treatment. However, the resultant weakening of abdominal muscles leaves patients susceptible to incisional hernia. Obesity, smoking, and diabetes mellitus are common risk factors for post-transplant hernia. However, the literature is void on the impact these risk factors have on timing and size of hernia. METHODS: We performed a retrospective review of all post-abdominal transplant patients who underwent hernia repair in 2010-2017 at a single institution. Primary outcomes were hernia size and time from transplant to hernia repair. RESULTS: We identified 31 patients. The majority of patients were female (15 male, 16 female), and the average patient was 56 ± 8.7 years old and obese (body mass index 30.6). Smoking (26.7%, n = 8) and diabetes mellitus (51.6%, n = 16) were prevalent. Transplant types represented were renal (n = 24), simultaneous pancreas-kidney (n = 5), liver (n = 1), and liver with subsequent kidney (n = 1). The median size of hernia was 100.0 cm2 (interquartile range [IQR]: 78.5-234.0), and median time to hernia repair was 53.0 months (IQR: 12.5-110.0). Risk factors (obesity, smoking, and diabetes) did not influence hernia size, nor alter time to hernia repair. CONCLUSION: Obesity, smoking, and diabetes mellitus are not prognostic of size or onset of post-transplant incisional hernia. Large cohort studies are needed to determine predictive factors of size and onset of hernia.


Assuntos
Hérnia Abdominal/epidemiologia , Hérnia Abdominal/etiologia , Hérnia Incisional/epidemiologia , Hérnia Incisional/etiologia , Transplante de Órgãos/efeitos adversos , Índice de Massa Corporal , Estudos de Coortes , Diabetes Mellitus/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Obesidade/epidemiologia , Prevalência , Estudos Retrospectivos , Fatores de Risco , Fumar/efeitos adversos
2.
Plast Reconstr Surg Glob Open ; 8(10): e2763, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33173655

RESUMO

Facial rejuvenation is a rapidly advancing field in aesthetic medicine. Minimally invasive techniques represent a powerful tool for rejuvenation, and fillers are a popular modality with which to restore and optimize facial proportions. Currently, our filler armamentarium is characterized by products with an increasing variety of biochemical compositions warranting tailored injection approaches. An intimate knowledge of anatomy, product characteristics, and appropriate injection techniques is essential to achieve optimal results while maintaining patient safety. Here, we review facial anatomy, structural changes secondary to aging, appropriate filler selection, safe injection techniques, and complications.

3.
J Burn Care Res ; 41(5): 1009-1014, 2020 09 23.
Artigo em Inglês | MEDLINE | ID: mdl-32598473

RESUMO

The features of work-related burn (WRB) injuries are not well defined in the literature and they vary depending on geographical location. We wanted to describe these characteristics among patients treated in the UNC Burn Center to evaluate the potential impact of commonly accepted prevention efforts. Adults of working age, admitted between January 1, 2013, and December 31, 2018, were identified using our Burn Center Registry. Demographic data, characteristics of injury, course of treatment, and patients' outcomes were described. Differences between work-related and non-work-related injuries were evaluated using the Chi-square test and Student t-test where appropriate. Three thousand five hundred and forty-five patients were included. WRB cases constituted 18% of the study population, and this proportion remained relatively stable during the study timeframe. Young white males were the majority of this group. When compared with non-WRB patients, they were characterized by fewer co-morbidities, decreased TBSA burns, decreased risk of inhalation injury, shorter time of intensive care treatment, shorter lengths of hospital stay, and lower treatment cost. In contrast to non-WRB, among which flame injuries were the main reason for admission, work-related patients most often suffered scald burns. They also had a dramatically increased proportion of chemical and electrical burns, making the latter the most common cause of death in that group. WRB are characterized by a characteristic patient profile, burn etiologies, and outcomes. Learning specific patterns at this group may contribute to optimize work safety regulations and medical interventions.


Assuntos
Queimaduras/epidemiologia , Traumatismos Ocupacionais/epidemiologia , Adulto , Unidades de Queimados , Queimaduras/terapia , Cuidados Críticos , Feminino , Hospitalização , Humanos , Masculino , Pessoa de Meia-Idade , Traumatismos Ocupacionais/terapia , Estudos Retrospectivos , Taxa de Sobrevida , Centros de Atenção Terciária , Adulto Jovem
4.
Plast Reconstr Surg Glob Open ; 8(3): e2624, 2020 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-32537325

RESUMO

Female genital mutilation (FGM) is a growing problem in the United States, with the past few decades showing a dramatic increase in prevalence. This study aims to understand the plastic surgeon experience with FGM and inform preparedness for this rising problem. METHODS: A 26-question survey was developed and electronically distributed to a random cohort of 2,508 active American Society of Plastic Surgeons members. It was sent three times over a 3-week period in 2018. χ2 statistical tests were used to analyze outcomes, assuming a P < 0.05 level for statistical significance. RESULTS: There was a 7% survey response rate (n=180). Demographic profiles reflected a range of practice types, geographical distribution, and years of experience. Ninety-five percent of respondents had heard of FGM (n=169). Sixty-seven percent were aware that surgical reconstructive options exist for FGM (n=115), with only 5% reporting any formal training on the topic (n=10). Only 13.6% of those surveyed felt prepared to care for a woman with FGM (n=23). CONCLUSIONS: After surveying plastic surgeons, responses demonstrate that while the majority are familiar with FGM, very few are comfortable or prepared for the care and surgical management of this patient population. Although this study is limited by a low response rate, we believe that the results reflect an existing knowledge gap and demonstrate the need for formal training. This may help to bridge this gap and prepare surgeons to care for this population.

5.
Plast Reconstr Surg ; 145(3): 608e-616e, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32097331

RESUMO

BACKGROUND: Various surgical techniques exist for lower extremity reconstruction, but limited high-quality data exist to inform treatment strategies. Using multi-institutional data and rigorous matching, the authors evaluated the effectiveness and cost of three common surgical reconstructive modalities. METHODS: All adult subjects with lower extremity wounds who received bilayer wound matrix, local tissue rearrangement, or free flap reconstruction were retrospectively reviewed (from 2010 to 2017). Cohorts' comorbidities and wound characteristics were balanced. Graft success at 180 days was the primary outcome; readmissions, reoperations, and costs were secondary outcomes. RESULTS: Five hundred one subjects (166 matrix, 190 rearrangement, and 145 free flap patients) were evaluated. Matched subjects (n = 312; 104/group) were analyzed. Reconstruction success at 180 days for matrix, local tissue rearrangement, and free flaps was 69.2 percent, 91.3 percent, and 93.3 percent (p < 0.001), and total costs per subject were $34,877, $35,220, and $53,492 (p < 0.001), respectively. Median length of stay was at least 2 days longer for free flaps (p < 0.0001). Readmissions and reoperations were greater for free flaps. Local tissue rearrangement, if achievable, provided success at low cost. Free flaps were effective with large, traumatic wounds but at higher costs and longer length of stay. Matrices successfully treated older, obese patients without exposed bone. CONCLUSIONS: Lower extremity reconstruction can be performed effectively using multiple modalities with varying degrees of success and costs. Local tissue rearrangement and free flaps demonstrate success rates greater than 90 percent. Bilayer wound matrix-based reconstruction effectively treats a distinct patient population. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, III.


Assuntos
Retalhos de Tecido Biológico/transplante , Traumatismos da Perna/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Transplante de Pele/métodos , Pele Artificial , Adulto , Idoso , Amputação Cirúrgica/economia , Amputação Cirúrgica/estatística & dados numéricos , Sulfatos de Condroitina/uso terapêutico , Colágeno/uso terapêutico , Feminino , Retalhos de Tecido Biológico/efeitos adversos , Retalhos de Tecido Biológico/economia , Sobrevivência de Enxerto , Custos de Cuidados de Saúde/estatística & dados numéricos , Humanos , Traumatismos da Perna/diagnóstico , Traumatismos da Perna/economia , Tempo de Internação/economia , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Readmissão do Paciente/economia , Readmissão do Paciente/estatística & dados numéricos , Procedimentos de Cirurgia Plástica/efeitos adversos , Procedimentos de Cirurgia Plástica/economia , Procedimentos de Cirurgia Plástica/instrumentação , Reoperação/economia , Reoperação/estatística & dados numéricos , Estudos Retrospectivos , Índice de Gravidade de Doença , Transplante de Pele/efeitos adversos , Transplante de Pele/economia , Transplante de Pele/instrumentação , Resultado do Tratamento
6.
Aesthet Surg J ; 40(1): 108-117, 2020 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-30873530

RESUMO

BACKGROUND: The efficacy of adipose-derived stem cells (ASCs) to improve wound healing has been extensively investigated. Unfortunately, no consistent reports have described significant improvements in healing time or outcomes in large-scale clinical trials utilizing human ASCs. Primarily, these studies examined undifferentiated ASCs as opposed to specific cells differentiated from ASCs. OBJECTIVES: The authors sought to examine the properties of fibroblasts differentiated from human ASCs (dFib cells) compared with those of primary dermal fibroblasts. METHODS: ASCs were isolated from healthy female patients, differentiated into dFib cells, and compared with intra-patient primary dermal fibroblasts for morphology, extracellular matrix (ECM) marker expression, and cell migration employing qPCR, western blot, and scratch test assays. RESULTS: De novo differentiated fibroblasts produce higher levels of the healthy ECM markers Elastin, Fibronectin, and Collagen 1 compared with primary fibroblasts. In contrast, dFib cells have reduced expression of the scar tissue markers αSMA, Collagen 3, and MMP-1. Further, dFib cells close scratch defects more quickly than primary dermal fibroblasts (32 ± 12.85 hours vs 64 ± 13.85 hours, P < 0.01) in a scratch test assay. CONCLUSIONS: These data suggest that fibroblasts newly differentiated from human ASCs migrate well and produce a robust ECM, the combination of which may contribute to improved wound healing, and thus should be further investigated.


Assuntos
Tecido Adiposo , Células-Tronco , Adipócitos , Matriz Extracelular , Feminino , Fibroblastos , Humanos
7.
Science ; 364(6438)2019 04 26.
Artigo em Inglês | MEDLINE | ID: mdl-31023895

RESUMO

Metabolic health depends on the capacity of adipose tissue progenitor cells to undergo de novo adipogenesis. The cellular hierarchy and mechanisms governing adipocyte progenitor differentiation are incompletely understood. Through single-cell RNA sequence analyses, we show that the lineage hierarchy of adipocyte progenitors consists of distinct mesenchymal cell types that are present in both mouse and human adipose tissues. Cells marked by dipeptidyl peptidase-4 (DPP4)/CD26 expression are highly proliferative, multipotent progenitors. During the development of subcutaneous adipose tissue in mice, these progenitor cells give rise to intercellular adhesion molecule-1 (ICAM1)/CD54-expressing (CD54+) committed preadipocytes and a related adipogenic cell population marked by Clec11a and F3/CD142 expression. Transforming growth factor-ß maintains DPP4+ cell identity and inhibits adipogenic commitment of DPP4+ and CD142+ cells. Notably, DPP4+ progenitors reside in the reticular interstitium, a recently appreciated fluid-filled space within and between tissues, including adipose depots.


Assuntos
Adipócitos/citologia , Adipogenia , Tecido Adiposo/citologia , Células-Tronco Mesenquimais/citologia , Adipócitos/enzimologia , Animais , Dipeptidil Peptidase 4/metabolismo , Fatores de Crescimento de Células Hematopoéticas/metabolismo , Humanos , Molécula 1 de Adesão Intercelular/metabolismo , Lectinas Tipo C/metabolismo , Células-Tronco Mesenquimais/enzimologia , Camundongos , Análise de Sequência de RNA , Análise de Célula Única , Tromboplastina/metabolismo , Fator de Crescimento Transformador beta/metabolismo
8.
J Burn Care Res ; 38(1): e261-e268, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-27359189

RESUMO

The Burn Rehabilitation Therapist Competency Tool (BRTCT) was developed in 2011 to define core knowledge and skill sets that are central to the job performance of occupational and physical therapists working with burn patients during acute hospitalization and initial rehabilitation. It was the first national effort to provide standards that burn centers could use for the training and evaluation of a BRT performance. The American Burn Association Rehabilitation Committee recently expanded the tool to include long-term rehabilitation and outpatient care in order to more fully represent all of the stages of care in which patients with burn injury receive therapy. Thirty-six burn centers contributed competencies, 17 rehabilitation experts participated in a systematic Delphi questionnaire process, and eight representatives from seven additional burn centers validated the tool. The revised BRTCT, called the BRTCT-2, includes four new practice domains and 28 new competency statements. The expanded tool provides a common framework of standards for performance for occupational and physical therapists working with patients throughout the full spectrum of burn care.


Assuntos
Assistência Ambulatorial/normas , Queimaduras/reabilitação , Competência Clínica , Terapeutas Ocupacionais/normas , Fisioterapeutas/normas , Inquéritos e Questionários , Comitês Consultivos , Unidades de Queimados/normas , Técnica Delphi , Feminino , Humanos , Assistência de Longa Duração/normas , Masculino , Avaliação de Resultados em Cuidados de Saúde , Estados Unidos
9.
JAMA Pediatr ; 170(6): 534-42, 2016 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-26953515

RESUMO

IMPORTANCE: Patient-reported outcomes serving as benchmarks for recovery of pediatric burn survivors are lacking, and new approaches using longitudinal cohorts for monitoring their expected recovery based on statistical models are needed for patient management during the early years following the burn. OBJECTIVE: To describe multidimensional patient-reported outcomes among pediatric burn survivors younger than 5 years to establish benchmarks using recovery curve methods. DESIGN, SETTING, AND PARTICIPANTS: Prospective cohort study of pediatric burn survivors younger than 5 years at 12 burn centers. Age-matched nonburned reference groups were studied to define expected results in normal growth and development. The Burn Outcomes Questionnaire for children aged 0 to 5 years (BOQ0-5) was administered to parents of children who had burns and were younger than 5 years. Mixed models were used to generate 48-month recovery curves for each of the 10 BOQ0-5 domains. The study was conducted between January 1999 and December 2008. MAIN OUTCOMES AND MEASURES: The 10 BOQ0-5 domains including play, language, fine motor skills, gross motor skills, emotional behavior, family functioning, pain/itching, appearance, satisfaction with care, and worry/concern up to 48 months after burn injury. RESULTS: A total of 336 pediatric burn survivors younger than 5 years (mean [SD] age, 2.0 [1.2] years; 58.4% male; 60.2% white, 18.6% black, and 12.0% Hispanic) and 285 age-matched nonburned controls (mean [SD] age, 2.4 [1.3] years; 51.1% male; 67.1% white, 8.9% black, and 15.0% Hispanic) completed the study. Predicted scores improved exponentially over time for 5 of the BOQ0-5 domains (predicted scores at 1 month vs 24 months: play, 48.6 vs 52.1 [P = .03]; language, 49.2 vs 54.4 [P < .001]; gross motor skills, 48.7 vs 53.0 [P = .002]; pain/itching, 15.8 vs 33.5 [P < .001]; and worry/concern, 31.6 vs 44.9 [P < .001]). Pediatric burn survivors had higher scores in language, emotional behavior, and family functioning domains compared with healthy children in later months. CONCLUSIONS AND RELEVANCE: This study demonstrates significant deficits in multiple functional domains across pediatric burn survivors compared with controls. Recovery curves can be used to recognize deviation from the expected course and tailor care to patient needs.


Assuntos
Queimaduras/reabilitação , Sobreviventes/psicologia , Ansiedade/etiologia , Unidades de Queimados/estatística & dados numéricos , Queimaduras/patologia , Estudos de Casos e Controles , Pré-Escolar , Feminino , Humanos , Transtornos do Desenvolvimento da Linguagem/etiologia , Tempo de Internação/estatística & dados numéricos , Masculino , Transtornos das Habilidades Motoras/etiologia , Medidas de Resultados Relatados pelo Paciente , Estudos Prospectivos , Prurido/etiologia , Psicometria , Inquéritos e Questionários
11.
Ann Plast Surg ; 70(5): 563-7, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23542842

RESUMO

INTRODUCTION: Generalized neuropathy after burn injury is quite common, but the diagnosis and management of peripheral nerve compression, late after injury, can be difficult. Although the release of upper extremity nerves has been reported, the indications, timing, and outcomes of lower extremity nerve decompression, after burn injury, are not known. METHODS: We performed a descriptive, retrospective, 10-year review of elective peripheral nerve decompression in 107 burn patients, at a regional burn center. Data collected included age, injury type, total body surface area, prior fasciotomy/escharotomy, preoperative function, electromyography/nerve conduction studies, time from injury to decompression, and decompression site. Main outcome measures included postoperative function, complications, and length of follow-up. RESULTS: Sixteen patients (mean age, 40.2 years; total body surface area, 31%), with thermal (9), electrical (5), and chemical (2) burns, underwent 19 lower extremity nerve decompression procedures, a mean of 23 months after injury, at the following locations: common peroneal (15), superficial peroneal (2), saphenous (1), and sural (1) nerve. Five patients had previous fasciotomy or escharotomy. Preoperatively, 6 patients had foot drop (≤2/5 on motor scale), 6 had weak dorsiflexion (3-4/5), and 2 had no foot drop but abnormal sensation. There were an additional 2 patients who had strictly abnormal sensory findings (1 sural and 1 saphenous nerve compression), which gave a total of 4 patients with impaired sensation. Electromyography/nerve conduction study data were abnormal in 10 of 11 patients tested. Mean tourniquet time was 35 minutes. Of 19 nerves, 14 (73.6%) showed definite improvement, 2 (10.5%) showed mild improvement, and 3 (10.5%) showed no improvement in sensorimotor symptoms. Complications included 2 patients with dehiscence, 2 patients with cellulitis, and 2 patients with failure to improve. Length of follow-up was 20 months. CONCLUSIONS: Lower extremity nerve decompression is effective in improving sensory and motor dysfunction, even late after burn injury, and should be considered in patients with persistent foot drop, paresthesias, and dysesthesias, given the low morbidity of this procedure and high potential for improved function.


Assuntos
Queimaduras/complicações , Descompressão Cirúrgica , Extremidade Inferior/inervação , Síndromes de Compressão Nervosa/cirurgia , Procedimentos Neurocirúrgicos , Adulto , Feminino , Seguimentos , Humanos , Extremidade Inferior/lesões , Extremidade Inferior/cirurgia , Masculino , Pessoa de Meia-Idade , Síndromes de Compressão Nervosa/etiologia , Neuropatias Fibulares/etiologia , Neuropatias Fibulares/cirurgia , Complicações Pós-Operatórias , Recuperação de Função Fisiológica , Estudos Retrospectivos , Nervo Sural , Resultado do Tratamento
12.
Ann Plast Surg ; 70(5): 521-6, 2013 May.
Artigo em Inglês | MEDLINE | ID: mdl-23542846

RESUMO

INTRODUCTION: Hypertrophic burn scars produce significant morbidity, including itching, pain, stiffness, and contracture. Best practices for management continue to evolve. Lasers have recently been added to treatment algorithms, but indications and efficacy have not been fully defined. We studied the impact of laser therapies on hypertrophic burn scars. METHODS: We conducted a prospective, before-after study in burn patients with hypertrophic scars. Procedures were performed more than 6 months after burn injury and were repeated monthly. The pulsed-dye laser was used for pruritus and erythema, whereas the fractional CO2 laser was used for stiffness and abnormal texture. All procedures were performed in the OR, with anesthesia. Outcomes are as follows: (1) Vancouver Scar Scale (objective changes in pigmentation, erythema, pliability, height; range, 0-15) and (2) UNC Scar Scale (subjective changes in pain, itching, tingling, stiffness; range, 0-12). Before-after scores were compared by Student t test, with significance assigned to P values of <0.05. RESULTS: During 2011, we treated 147 patients (mean age, 26.9 years; mean TBSA, 16.1%) over 415 sessions (2.8 sessions/patient), including pulsed dye laser (n = 327) and CO2 (n = 139), mean surface area of 83 cm. Etiology included flame (75), scald (37), and other (35). Treatments occurred 16 months (median) and 48 months (mean) after burn injury. Vancouver Scar Scale decreased from 10.4 (SD, 2.4) to 5.2 (1.9) (P < 0.0001). UNC Scar Scale decreased from 5.4 (2.5) to 2.1 (1.7) (P < 0.0001). Mean length of follow-up was 4.7 months. CONCLUSIONS: Laser therapies significantly improve both the signs and symptoms of hypertrophic burn scars, as measured by objective and subjective instruments.


Assuntos
Queimaduras/complicações , Cicatriz Hipertrófica/cirurgia , Lasers de Corante/uso terapêutico , Lasers de Gás/uso terapêutico , Lasers de Estado Sólido/uso terapêutico , Adolescente , Adulto , Criança , Pré-Escolar , Cicatriz Hipertrófica/etiologia , Feminino , Seguimentos , Humanos , Masculino , Estudos Prospectivos , Resultado do Tratamento , Adulto Jovem
13.
J Pediatr Surg ; 47(10): 1900-6, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-23084204

RESUMO

BACKGROUND/PURPOSE: The purpose of this study was to examine the impact on the family of immediate appendectomy compared with initial nonoperative management for perforated appendicitis in children. METHODS: Sixty-six prospectively identified families of children with perforated appendicitis completed a daily activity journal and the Impact on Family Scale at presentation and at completion of therapy. RESULTS: There were no significant differences in postoperative surgical site infections or number of missed school or employment days between the immediate appendectomy group (n = 40) and the initial nonoperative management group (n = 26). Impact on Family Scale total scores decreased over time for both groups, but this improvement over time was significant only in the initial nonoperative management group (P < .01). CONCLUSIONS: Immediate appendectomy or initial nonoperative management can effectively manage perforated appendicitis in children with no statistically significant differences in the number of missed school or employment days. Greater improvements in family impact are associated with initial nonoperative management as measured by the Impact on Family Scale at completion of therapy.


Assuntos
Apendicite/terapia , Família , Apendicectomia , Apendicite/cirurgia , Criança , Feminino , Humanos , Masculino , Estudos Prospectivos
14.
Dermatol Res Pract ; 2012: 243651, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22778719

RESUMO

Restoration of form and function after burn injury remains challenging, but emerging laser and pulsed light technologies now offer hope for patients with hypertrophic scars, which may be associated with persistent hyperemia, chronic folliculitis, intense pruritis, and neuropathic pain. In addition to impairing body image, these scars may limit functional recovery, compromise activities of daily living, and prevent return to work. Three different platforms are now poised to alter our reconstructive algorithm: (1) vascular-specific pulsed dye laser (PDL) to reduce hyperemia, (2) ablative fractional CO(2) laser to improve texture and pliability of the burn scar, and (3) intense pulsed light (IPL) to correct burn scar dyschromia and alleviate chronic folliculitis. In this paper, we will provide an overview of our work in this area, which includes a systematic review, a retrospective analysis of our preliminary experience, and interim data from our on-going, prospective, before-after cohort trial. We will demonstrate that laser- and light-based therapies can be combined with each other safely to yield superior results, often at lower cost, by reducing the need for reconstructive surgery. Modulating the burn scar, through minimally invasive modalities, may replace conventional methods of burn scar excision and yield outcomes not previously possible or conceivable.

15.
J Pediatr Surg ; 47(6): 1072-9, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22703772

RESUMO

PURPOSE: This study was aimed at examining an airway construct engineered from autologous amniotic mesenchymal stem cells (aMSCs) and a xenologous decellularized airway scaffold as a means for tracheal repair. METHODS: Fetal lambs (N = 13) with a tracheal defect were divided into 2 groups. One group (acellular, n = 6) was repaired with a decellularized leporine tracheal segment. The other group (engineered, n = 7) received an identical graft seeded with expanded/labeled autologous aMSCs. Newborns were euthanized for multiple analyses. RESULTS: Eleven lambs survived to term, 10 of which could breathe at birth. Engineered grafts showed a significant increase in diameter in vivo (P = .04) unlike acellular grafts (P = .62), although variable stenosis was present in all implants. Engineered constructs exhibited full epithelialization, compared with none of the acellular grafts (P = .002). Engineered grafts had a significantly greater degree of increase in elastin levels after implantation than acellular implants (P = .04). No such differences were noted in collagen and glycosaminoglycan contents. Donor cells were detected in engineered grafts, which displayed a pseudostratified columnar epithelium. CONCLUSIONS: Constructs engineered from aMSCs and decellularized airway undergo enhanced remodeling and epithelialization in vivo when compared with equivalent acellular implants. Amniotic mesenchymal stem cell-engineered airways may become an alternative for perinatal airway repair.


Assuntos
Bioprótese , Terapias Fetais/métodos , Implantes Experimentais , Células-Tronco Mesenquimais/citologia , Engenharia Tecidual , Traqueia/embriologia , Traqueia/cirurgia , Líquido Amniótico/citologia , Animais , Células Cultivadas , Células Epiteliais/citologia , Feminino , Gravidez , Coelhos , Ovinos , Alicerces Teciduais , Traqueia/lesões , Transplante Autólogo
16.
J Pediatr Surg ; 47(6): 1150-4, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22703785

RESUMO

BACKGROUND: Children with intestinal failure (IF) are at risk for small bowel bacterial overgrowth (SBBO) because of anatomical and other factors. We sought to identify risk factors for SBBO confirmed by quantitative duodenal culture. METHODS: A single-center retrospective record review of children who had undergone endoscopic evaluation for SBBO (defined as bacterial growth in duodenal fluid of >10(5) colony-forming unit per mL) was performed. RESULTS: We reviewed 57 children with median (25th-75th percentile) age 5.0 (2.0-9.2) years. Diagnoses included motility disorders (28%), necrotizing enterocolitis (16%), atresias (16%), gastroschisis (14%), and Hirschsprung disease (10.5%). Forty patients (70%) had confirmed SBBO. Univariate analysis showed no significant differences between patients with and without SBBO for the following variables: age, sex, diagnosis, presence of ileocecal valve, and antacid use. Patients receiving parenteral nutrition (PN) were more likely to have SBBO (70% vs 35%, P = .02). Multiple logistic regression analysis confirmed that PN administration was independently associated with SBBO (adjusted odds ratio, 5.1; adjusted 95% confidence interval, 1.4-18.3; P = .01). SBBO was not related to subsequent risk of catheter-related bloodstream infection (CRBSI). CONCLUSION: SBBO is strongly and independently associated with PN use. Larger prospective cohorts and more systematic sampling techniques are needed to better determine the relationship between SBBO and gastrointestinal function.


Assuntos
Bactérias/isolamento & purificação , Duodenoscopia , Duodeno/microbiologia , Conteúdo Gastrointestinal/microbiologia , Síndromes de Malabsorção/diagnóstico , Nutrição Parenteral/efeitos adversos , Antiácidos/uso terapêutico , Bacteriemia/epidemiologia , Bacteriemia/etiologia , Carga Bacteriana , Infecções Relacionadas a Cateter/epidemiologia , Criança , Pré-Escolar , Enterocolite Necrosante/complicações , Enterocolite Necrosante/microbiologia , Feminino , Motilidade Gastrointestinal , Gastrosquise/complicações , Gastrosquise/microbiologia , Doença de Hirschsprung/complicações , Doença de Hirschsprung/microbiologia , Humanos , Valva Ileocecal , Lactente , Atresia Intestinal/complicações , Atresia Intestinal/microbiologia , Síndromes de Malabsorção/microbiologia , Masculino , Estudos Retrospectivos , Fatores de Risco , Síndrome do Intestino Curto/diagnóstico , Síndrome do Intestino Curto/microbiologia , Sucção
17.
J Pediatr Surg ; 47(6): 1167-9, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22703788

RESUMO

PURPOSE: Concerns abound regarding the radiation dose administered to children during trauma evaluations. It is important to minimize the radiation dose administered when a computed tomographic (CT) scan is performed. This study was carried out to determine the radiation dose delivered during trauma abdominal/pelvic CT scans performed in community hospitals. METHODS: Data on consecutive children transferred after abdominal/pelvic CT scan for trauma were reviewed. Dose information was retrieved directly from reports provided, or the hospital was contacted directly, and an age-standardized dose ratio was generated. RESULTS: One hundred eighty-six patients were identified, and 36 patients were excluded, leaving 150 patients from 40 different hospitals. Half received radiation doses that were less than the national 75th percentile norm, and half received radiation doses that were greater, overall ranging from 0.17 to 5.07 times. CONCLUSIONS: Radiation exposure is a concern among those who evaluate injured children. Although not performing a CT scan may be the best way to reduce the dose, when a CT scan is deemed necessary, the scanner must be adjusted to the lowest possible settings necessary to obtain the information desired. This study identified a thirty-times range of radiation dosage for CT scans performed across 40 different hospitals.


Assuntos
Hospitais Comunitários/estatística & dados numéricos , Doses de Radiação , Tomografia Computadorizada por Raios X/estatística & dados numéricos , Traumatismos Abdominais/diagnóstico por imagem , Adolescente , Boston , Criança , Pré-Escolar , Feminino , Humanos , Lactente , Masculino , Política Organizacional , Transferência de Pacientes , Pelve/diagnóstico por imagem , Pelve/lesões , Estudos Retrospectivos , Tomografia Computadorizada por Raios X/efeitos adversos , Tomografia Computadorizada por Raios X/instrumentação
18.
J Pediatr Surg ; 47(6): 1177-84, 2012 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-22703790

RESUMO

BACKGROUND/PURPOSE: We compared direct hospital costs and indirect costs to the family associated with immediate appendectomy or initial nonoperative management for perforated appendicitis in children. METHODS: From June 2009 through May 2010, 61 prospectively identified families completed a cost diary, documenting the numbers of missed school days for the child and missed employment days for the adult caregiver(s) over the treatment course. Hospital costs were obtained from hospital financial databases. Mann-Whitney U tests and Fisher exact tests were used to compare outcome measures for each treatment strategy. RESULTS: Patients treated by initial nonoperative management had a significantly longer median length of stay (9 days vs 7 days, P = .02) and a significantly greater median total hospital cost per patient ($31,349 vs $21,323, P = .01) when compared with those treated by immediate appendectomy. There was no significant difference in median number of missed school days (9 days vs 10 days, P = .23) or missed employment days for adult caregiver(s) (5 days vs 7 days, P = .18) between treatment strategies. CONCLUSIONS: Patients with perforated appendicitis treated by initial nonoperative management had a greater length of stay and a significantly greater total hospital cost but were not burdened by significantly greater indirect costs compared with those treated by immediate appendectomy.


Assuntos
Apendicectomia/economia , Apendicite/economia , Efeitos Psicossociais da Doença , Gerenciamento Clínico , Custos Hospitalares/estatística & dados numéricos , Hospitais Pediátricos/economia , Hospitais Urbanos/economia , Abscesso Abdominal/tratamento farmacológico , Abscesso Abdominal/economia , Abscesso Abdominal/cirurgia , Absenteísmo , Adolescente , Adulto , Antibacterianos/uso terapêutico , Apendicectomia/estatística & dados numéricos , Apendicite/tratamento farmacológico , Apendicite/cirurgia , Boston , Cuidadores/economia , Criança , Pré-Escolar , Drenagem/economia , Drenagem/estatística & dados numéricos , Gastos em Saúde/estatística & dados numéricos , Humanos , Tempo de Internação/estatística & dados numéricos , Estudos Prospectivos
19.
J Air Waste Manag Assoc ; 61(8): 826-33, 2011 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-21874953

RESUMO

The National Institute for Occupational Safety and Health (NIOSH) research on direct-reading instruments (DRIs) needed an instantaneous sampling method to provide independent confirmation of the concentrations of chemical warfare agent (CWA) simulants. It was determined that evacuated canisters would be the method of choice. There is no method specifically validated for volatile organic compounds (VOCs) in the NIOSH Manual of Analytical Methods. The purpose of this study was to validate an evacuated canister method for sampling seven specific VOCs that can be used as a simulant for CWA agents (cyclohexane) or influence the DRI measurement of CWA agents (acetone, chloroform, methylene chloride, methyl ethyl ketone, hexane, and carbon tetrachloride [CCl4]). The method used 6-L evacuated stainless-steel fused silica-lined canisters to sample the atmosphere containing VOCs. The contents of the canisters were then introduced into an autosampler/preconcentrator using a microscale purge and trap (MPT) method. The MPT method trapped and concentrated the VOCs in the air sample and removed most of the carbon dioxide and water vapor. After preconcentration, the samples were analyzed using a gas chromatograph with a mass selective detector. The method was tested, evaluated, and validated using the NIOSH recommended guidelines. The evaluation consisted of determining the optimum concentration range for the method; the sample stability over 30 days; and the accuracy, precision, and bias of the method. This method meets the NIOSH guidelines for six of the seven compounds (excluding acetone) tested in the range of 2.3-50 parts per billion (ppb), making it suitable for sampling of these VOCs at the ppb level.


Assuntos
Substâncias para a Guerra Química/análise , Poluentes Atmosféricos/análise , Calibragem , Monitoramento Ambiental , Cromatografia Gasosa-Espectrometria de Massas , Reprodutibilidade dos Testes
20.
Ann Plast Surg ; 64(5): 553-8, 2010 May.
Artigo em Inglês | MEDLINE | ID: mdl-20395811

RESUMO

Hot-press hand injuries create significant challenges, in terms of acute coverage and restoration of function, and long-term outcomes are largely unknown. This article reviews the comprehensive management of hot-press hand injuries--which includes damage control procedures, resurfacing, reconstruction, and rehabilitation--and assesses outcomes such as return to work and final impairment ratings. We treated 56 patients with hot-press hand injuries, at a verified, accredited burn center in the Southeast between 1994 and 2008. Mechanism included laundry press (42 cases), industrial press (11 cases), and home appliance (3 cases). Mean burn size was 118 cm2, with 43 full-thickness and 13 partial thickness injuries. Mean follow-up was 17.7 months. During this 15-year period, 39 patients (70%) were admitted acutely (mean length of stay: 10.4 days), 48 patients (86%) required operative intervention, and 28 patients (50%) had secondary reconstruction, which included nerve decompression (11 cases), contracture release (11 cases), tendon procedures (11 cases), and joint repair (5 cases). Mean final impairment rating was 22%, with 38 patients (68%) returning to work. Hot-press hand burns can be devastating, but return to work is possible for most patients. We recommend early wound excision, aggressive perioperative hand therapy, low threshold for reconstructive procedures, and rehabilitative support.


Assuntos
Queimaduras/cirurgia , Traumatismos da Mão/cirurgia , Procedimentos de Cirurgia Plástica , Acidentes de Trabalho , Adulto , Queimaduras/etiologia , Queimaduras/reabilitação , Descompressão Cirúrgica , Feminino , Traumatismos da Mão/etiologia , Traumatismos da Mão/reabilitação , Humanos , Masculino , Pessoa de Meia-Idade , Recuperação de Função Fisiológica , Estudos Retrospectivos , Resultado do Tratamento
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