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1.
Int Wound J ; 14(4): 661-665, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27696723

RESUMO

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.


Assuntos
Traumatismos Abdominais/etiologia , Traumatismos Abdominais/terapia , Neoplasias do Colo/complicações , Neoplasias do Colo/mortalidade , Tratamento de Ferimentos com Pressão Negativa/métodos , Cicatrização/fisiologia , Adulto , Evolução Fatal , Humanos , Masculino , Metástase Neoplásica
2.
Int Wound J ; 14(2): 414-419, 2017 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-27524677

RESUMO

Acellular dermal matrix (ADM) is commonly employed to create an inferior pocket for the tissue expander in two-stage breast reconstruction. The authors sought to determine whether placement of ADM during the first stage of reconstruction decreases the amount of capsule formation at implant exchange. Patients who underwent mastectomy and tissue expander reconstruction were included in this study. Two biopsies were obtained at the time of implant exchange, one from the pocket adjacent to the ADM and the other from the area adjacent to the pectoralis muscle. Pathology analysis was performed on each sample. Ten patients underwent immediate breast reconstruction with Alloderm during the 3-month study period. Capsule thickness was significantly greater in the areas where the expander was in direct contact with the pectoralis muscle (782 ± 194 µm) compared to those in contact with human acellular dermal matrix (hADM) (47·91 ± 110·82 µm; P < 0·05). Analysis of the sub-pectoral capsule demonstrated diffuse deposition of collagen, neutrophils, contractile myofibroblasts and synovia-like metaplasia, characteristic of a foreign body response. Conversely, within the inferior pocket where the hADM was in direct contact with the expander, we noted migration of host epithelial cells, fibroblasts, mesenchymal cells and angiogenesis, indicating host tissue regeneration. Acellular dermal matrix, when placed at the first stage of breast reconstruction, significantly reduces thickness and inflammatory character of the capsule in comparison to the patient's native tissue.


Assuntos
Derme Acelular , Implantes de Mama , Neoplasias da Mama/reabilitação , Neoplasias da Mama/cirurgia , Colágeno/efeitos adversos , Mamoplastia/métodos , Dispositivos para Expansão de Tecidos , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Fatores de Tempo , Cicatrização
3.
Ann Plast Surg ; 70(2): 211-5, 2013 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-22791058

RESUMO

BACKGROUND: We compared the efficacy of pectoralis turnover versus advancement technique for sternal wound reconstruction. METHODS: A retrospective chart review was performed, December 1989 to December 2010, to compare postoperative complication rates between pectoralis major turnover versus pectoralis major advancement reconstruction techniques. Complications included hematomas, wound infections, tissue necrosis, dehiscence, and need for reoperation. Pearson χ and logistic regression were used and significance was P < 0.05. RESULTS: Sixty-seven patients received 91 tissue flaps. Eleven patients (16%) required reoperation due to complications, including recurrent wound infection, tissue necrosis, wound dehiscence, mediastinitis, and hematoma formation. Four patients (6%) were treated conservatively for minor complications. Overall, complication rates were significantly higher after pectoralis major advancement reconstruction (32.5% vs. 3.7%, P = 0.004). CONCLUSIONS: When feasible, pectoralis major turnover flap offers a superior reconstructive technique for complex sternal wounds, with diminished complications compared with the pectoralis advancement flap.


Assuntos
Músculos Peitorais/cirurgia , Esterno , Retalhos Cirúrgicos , Ferimentos e Lesões/cirurgia , Feminino , Humanos , Masculino , Procedimentos de Cirurgia Plástica , Estudos Retrospectivos
4.
Ann Plast Surg ; 69(4): 439-41, 2012 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22214795

RESUMO

BACKGROUND: We sought to identify patient comorbidities that predict complications after tissue flap sternal reconstruction. METHODS: A retrospective study, December 1989 to December 2010, analyzed numerous comorbidities, including diabetes mellitus (DM), hypertension (HTN), coronary artery disease, congestive heart failure (CHF), and renal insufficiency, as independent risk factors for postoperative complications. Pearson χ2 test, Fisher exact test, 2-sample t test, and median-unbiased estimation were used for data analysis. Significance was P≤0.05. RESULTS: In all, 106 patients received 161 sternal tissue flap repairs. Nineteen patients (18%) required reoperation because of complications, including recurrent wound infection, tissue necrosis, wound dehiscence, mediastinitis, and hematoma formation. Our analysis found DM, HTN, and CHF as significant predictors of complications after sternal reconstruction (P=0.014, 0.012, and 0.006). CONCLUSIONS: Results suggest DM, HTN, and CHF may contribute to complications after tissue flap repair of sternal wounds, possibly through impaired perfusion and healing of repairs.


Assuntos
Mediastinite/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Complicações Pós-Operatórias/etiologia , Esternotomia , Retalhos Cirúrgicos/transplante , Técnicas de Fechamento de Ferimentos , Complicações do Diabetes , Feminino , Insuficiência Cardíaca/complicações , Humanos , Hipertensão/complicações , Modelos Logísticos , Masculino , Mediastinite/etiologia , Pessoa de Meia-Idade , Razão de Chances , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/cirurgia , Reoperação , Estudos Retrospectivos , Fatores de Risco , Resultado do Tratamento
5.
Aesthet Surg J Open Forum ; 4: ojac074, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36415222

RESUMO

Background: In 2014, the Plastic Surgery Residency Review Committee of the Accreditation Council for Graduate Medical Education (ACGME) increased minimum aesthetic surgery requirements. Consequently, the resident aesthetic clinic (RAC) has become an ever more important modality for training plastic surgery residents. Objectives: To analyze demographics and long-term surgical outcomes of aesthetic procedures performed at the Johns Hopkins and University of Maryland (JH/UM) RAC. A secondary objective was to evaluate the JH/UM RAC outcomes against those of peer RACs as well as board-certified plastic surgeons. Methods: We performed a retrospective chart review of all patients who underwent aesthetic procedures at the JH/UM RAC between 2011 and 2020. Clinical characteristics, minor complication rates, major complication rates, and revision rates from the JH/UM RAC were compared against 2 peer RACs. We compared the incidence of major complications between the JH/UM RAC and a cohort of patients from the CosmetAssure (Birmingham, AL) database. Pearson's chi-square test was used to compare complication rates between patient populations, with a significance set at 0.05. Results: Four hundred ninety-five procedures were performed on 285 patients. The major complications rate was 1.0% (n = 5). Peer RACs had total major complication rates of 0.2% and 1.7% (P = .07 and P = .47, respectively). CosmetAssure patients matched to JH/UM RAC patients were found to have comparable total major complications rates of 1.8% vs 0.6% (P = .06), respectively. At JH/UM, the minor complication rate was 13.9%, while the revision rate was 5.9%. Conclusions: The JH/UM RAC provides residents the education and training necessary to produce surgical outcomes comparable to peer RACs as well as board-certified plastic surgeons.

6.
Ann Plast Surg ; 65(2): 206-10, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20606588

RESUMO

In 2004, we published our 12-year experience with tissue transfer for deep sternal wound infection after median sternotomy, finding increased rates of reoperation for diabetic patients. Therefore, we decided to alter our treatment approach to diabetic patients to include sternal debridement followed by omental transposition. Eleven diabetic patients underwent omental transposition by our division during the study period. Hospital records were retrospectively reviewed to determine outcomes and complications. We found that diabetic patients treated after implementation of the new treatment approach were 5.4 times less likely to require reoperation for sternal wound management than were patients in the previous series, most of whom had been treated with pectoralis muscle flaps (95% confidence interval, 0.5- 50.5). By altering our treatment approach to use omental transposition as the initial surgical therapy, we were able to demonstrate a trend toward decreased need for flap revision in diabetic patients.


Assuntos
Diabetes Mellitus Tipo 1/complicações , Diabetes Mellitus Tipo 2/complicações , Omento/transplante , Procedimentos de Cirurgia Plástica/métodos , Esternotomia , Retalhos Cirúrgicos , Adulto , Idoso , Ponte de Artéria Coronária , Desbridamento , Feminino , Sobrevivência de Enxerto , Humanos , Masculino , Estudos Retrospectivos , Deiscência da Ferida Operatória/epidemiologia , Deiscência da Ferida Operatória/cirurgia , Irrigação Terapêutica , Resultado do Tratamento
7.
Ann Plast Surg ; 62(2): 173-4, 2009 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-19158529

RESUMO

This is a report of a patient with squamous cell carcinoma discovered in a bed of longstanding (>20 years) hidradenitis suppurativa. A literature search demonstrates this to be an entity with potentially devastating sequelae if not expediently diagnosed and treated. In light of the possibility of malignant transformation, the hidradenitis specimen and any suspicious lesions in proximity should be sent to pathology for thorough assessment.


Assuntos
Carcinoma de Células Escamosas/complicações , Hidradenite/complicações , Neoplasias Cutâneas/complicações , Úlcera Cutânea/complicações , Carcinoma de Células Escamosas/cirurgia , Humanos , Masculino , Pessoa de Meia-Idade , Neoplasias Cutâneas/cirurgia , Úlcera Cutânea/cirurgia
8.
Surg Infect (Larchmt) ; 9(4): 433-42, 2008 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-18759680

RESUMO

BACKGROUND: Implant infection is a common clinical complication of abdominal hernia repair. Our objectives were to determine if acellular dermal matrix (ADM) grafts resisted Staphylococcus aureus infection better (as measured by ability to reduce or clear bacterial counts) than synthetic (polytetrafluoroethylene [PTFE]) mesh when used in abdominal wall reconstruction, and to determine whether vascularization of the implant occurred. We hypothesized that the ability of the ADM grafts to vascularize and allow cellular ingrowth would allow the immune system to clear the infection better in these animals. METHODS: In New Zealand White rabbits (average weight, 3.0 kg), a full-thickness 3 x 3 cm(2) abdominal defect was created, then repaired with an interpositional implant (ADM, n = 62; PTFE, n = 57). Before skin closure, the epidermal surface of each implant was inoculated with 1 mL of S. aureus at various concentrations (10(4) colony-forming units [CFU]/mL, n = 82; 10(6) CFU/mL, n = 27; 10(9) CFU/mL, n = 10), and the rabbits were harvested at either day 7 or day 21. RESULTS: At day 7, ADM grafts inoculated with 10(4) CFU had lower counts or no bacteria (p = 0.006), fewer adhesions (p = 0.005), and fewer abscesses (p = 0.008) than PTFE grafts. By day 21, more ADM (n = 12) than PTFE (n = 0) grafts were free of bacteria (p = 0.002). Fewer rabbits with ADM grafts formed abscesses (13 vs. 19; p = 0.03). When evaluating the 7- and 21-day 10(4) CFU groups combined, a total of 15 rabbits with ADM cleared the bacteria completely vs. none of those with PTFE grafts (p < 0.001). There was no significant difference in bacterial counts or wound complications at days 7 or 21 between PTFE and ADM implants when inoculated with 10(6) CFU. All rabbits inoculated with 10(9) CFU died of sepsis within 48 h. Herniation did not occur in any of the animals. CONCLUSIONS: Our study demonstrates that ADM resists surgical site infection caused by S. aureus in an animal model without compromising the ventral hernia repair. This ability of ADM grafts to perform well in the setting of infection is most likely attributable to their capacity to vascularize and aid clearance of bacteria.


Assuntos
Colágeno , Hérnia Ventral/cirurgia , Próteses e Implantes/efeitos adversos , Infecções Estafilocócicas/prevenção & controle , Telas Cirúrgicas , Infecção da Ferida Cirúrgica/prevenção & controle , Animais , Derme , Modelos Animais de Doenças , Hérnia Ventral/complicações , Politetrafluoretileno , Coelhos , Pele Artificial , Infecções Estafilocócicas/microbiologia , Staphylococcus aureus , Infecção da Ferida Cirúrgica/microbiologia , Resultado do Tratamento , Cicatrização/fisiologia
9.
J Trauma ; 64(1): 139-43, 2008 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-18188112

RESUMO

INTRODUCTION: The reverse sural artery flap eliminates the need for long and technically demanding free tissue transfers, which have become the gold standard for significant tissue defects in the distal third of the leg and ankle. Unfortunately, the originally described reverse sural artery flap technique has a risk of partial or total flap necrosis as high as 25%. We hypothesized that delaying the flap (the delay time ranged from 48 hours to 2 weeks) and using a 4-cm wide pedicle would decrease the amount of partial flap necrosis that commonly occurs with this flap. PATIENTS: Five patients (3 women, 2 men) with open wounds in the distal lower extremity were treated with delayed fasciocutaneous reverse sural artery flaps elevated on a 4-cm wide pedicle. RESULTS: The patients ranged from 22 to 75 years of age and had sustained defects in the ankle region resulting from trauma. All five wounds healed with favorable functional and asthetic results without any evidence of flap necrosis. CONCLUSIONS: In patients with known vasculopathy, a surgical delay of 1 week and increasing the pedicle size to 4 cm may increase the likelihood of graft survival and decrease the amount of partial flap necrosis by dilating the arterial network.


Assuntos
Traumatismos da Perna/cirurgia , Extremidade Inferior/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Lesões dos Tecidos Moles/cirurgia , Retalhos Cirúrgicos , Adulto , Idoso , Feminino , Humanos , Extremidade Inferior/irrigação sanguínea , Masculino , Pessoa de Meia-Idade , Fatores de Tempo
10.
PLoS Med ; 3(6): e287, 2006 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-16737350

RESUMO

BACKGROUND: Obesity is associated with low-grade chronic inflammation, and serum markers of inflammation are independent risk factors for cardiovascular disease (CVD). However, the molecular and cellular mechanisms that link obesity to chronic inflammation and CVD are poorly understood. METHODS AND FINDINGS: Acute-phase serum amyloid A (A-SAA) mRNA levels, and A-SAA adipose secretion and serum levels were measured in obese and nonobese individuals, obese participants who underwent weight-loss, and persons treated with the insulin sensitizer rosiglitazone. Inflammation-eliciting activity of A-SAA was investigated in human adipose stromal vascular cells, coronary vascular endothelial cells and a murine monocyte cell line. We demonstrate that A-SAA was highly and selectively expressed in human adipocytes. Moreover, A-SAA mRNA levels and A-SAA secretion from adipose tissue were significantly correlated with body mass index (r = 0.47; p = 0.028 and r = 0.80; p = 0.0002, respectively). Serum A-SAA levels decreased significantly after weight loss in obese participants (p = 0.006), as well as in those treated with rosiglitazone (p = 0.033). The magnitude of the improvement in insulin sensitivity after weight loss was significantly correlated with decreases in serum A-SAA (r = -0.74; p = 0.034). SAA treatment of vascular endothelial cells and monocytes markedly increased the production of inflammatory cytokines, e.g., interleukin (IL)-6, IL-8, tumor necrosis factor alpha, and monocyte chemoattractant protein-1. In addition, SAA increased basal lipolysis in adipose tissue culture by 47%. CONCLUSIONS: A-SAA is a proinflammatory and lipolytic adipokine in humans. The increased expression of A-SAA by adipocytes in obesity suggests that it may play a critical role in local and systemic inflammation and free fatty acid production and could be a direct link between obesity and its comorbidities, such as insulin resistance and atherosclerosis. Accordingly, improvements in systemic inflammation and insulin resistance with weight loss and rosiglitazone therapy may in part be mediated by decreases in adipocyte A-SAA production.


Assuntos
Doenças Cardiovasculares/metabolismo , Inflamação/metabolismo , Obesidade/metabolismo , Proteína Amiloide A Sérica/metabolismo , Adipócitos/efeitos dos fármacos , Adipócitos/metabolismo , Tecido Adiposo/efeitos dos fármacos , Tecido Adiposo/metabolismo , Animais , Biomarcadores/metabolismo , Doenças Cardiovasculares/etiologia , Linhagem Celular , Ensaios Clínicos como Assunto , Estudos Transversais , Citocinas/metabolismo , Relação Dose-Resposta a Droga , Feminino , Humanos , Hipoglicemiantes/uso terapêutico , Inflamação/sangue , Inflamação/complicações , Lipólise/efeitos dos fármacos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Pessoa de Meia-Idade , Obesidade/sangue , Obesidade/complicações , Obesidade/tratamento farmacológico , Obesidade/terapia , RNA Mensageiro/metabolismo , Fatores de Risco , Rosiglitazona , Proteína Amiloide A Sérica/genética , Proteína Amiloide A Sérica/farmacologia , Células Estromais/metabolismo , Tiazolidinedionas/uso terapêutico
11.
Hernia ; 9(3): 231-7, 2005 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15912262

RESUMO

INTRODUCTION: Abdominal wall dehiscence in renal transplantation patients risks the survival of the transplanted organ. No clear treatment algorithm exists in the literature for this group of patients. METHODS: Between 1992 and 2001, the Division of Plastic Surgery at the University of Maryland treated 41 of 2499 renal transplant patients. Based on a retrospective review of these patients, an algorithm was developed to guide the management of midline and lower quadrant abdominal wall defects. RESULTS: Most lower quadrant defects were repaired with tensor fascia lata grafts. Most midline defects were repaired with the component separation technique. Use of a single- or multi-staged repair was based on the extent of infection. Hernia recurrence was 22% over 21 months. 80% of the transplant kidneys were functioning following repair. CONCLUSION: An algorithm for the repair of abdominal wall defects after kidney transplantation is presented taking into account the location and the extent of infection.


Assuntos
Hérnia Ventral/cirurgia , Transplante de Rim , Parede Abdominal/cirurgia , Adulto , Idoso , Algoritmos , Fascia Lata/transplante , Feminino , Hérnia Ventral/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Recidiva
12.
J Long Term Eff Med Implants ; 15(5): 547-58, 2005.
Artigo em Inglês | MEDLINE | ID: mdl-16218902

RESUMO

The use of prosthetic mesh for the tension-free repair of incisional hernias has been shown to be more effective than primary suture repair. Unfortunately, prosthetic materials can be a suboptimal choice in a variety of clinical scenarios. In general, prosthetic materials should not be implanted into sites with known contamination or infection because they lack an endogenous vascular network and are thus incapable of clearing bacteria. This is of particular relevance to the repair of recurrent hernias, which are often refractory to repair because of indolent bacterial colonization that weakens the site and retards appropriate healing. Although fascia lata grafts and muscle flaps can be employed for tension-free hernia repairs, they carry the potential for significant donor site morbidity. Recently, a growing number of clinicians have used human acellular dermal matrix as a graft material for the tension-free repair of ventral hernias. This material has been shown to become revascularized in both animal and human subjects. Once repopulated with a vascular network, this graft material is theoretically capable of clearing bacteria, a property not found in prosthetic graft materials. Unlike autologous materials such as fascial grafts and muscle flaps, acellular dermal matrix can be used without subjecting the patient to additional morbidity in the form of donor site complications. This article presents a thorough review of the current literature, describing the properties of human acellular dermal matrix and discussing both animal and human studies of its clinical performance. In addition to the review of previously published clinical experiences, we discuss our own preliminary results with the use of acellular dermal matrix for ventral hernia repair in 46 patients.


Assuntos
Hérnia Ventral/diagnóstico , Hérnia Ventral/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Retalhos Cirúrgicos , Bioprótese , Feminino , Humanos , Masculino , Prognóstico , Recidiva , Reoperação , Medição de Risco , Índice de Gravidade de Doença , Pele Artificial , Telas Cirúrgicas , Resistência à Tração , Resultado do Tratamento , Cicatrização/fisiologia
13.
Plast Reconstr Surg ; 112(1): 106-14, 2003 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-12832883

RESUMO

Secondary repair of recurrent ventral hernia is difficult, and success depends on re-establishing the functional integrity of the abdominal wall. Current techniques used for closure of these defects have documented recurrence rates as high as 54 percent. The authors' 8-year experience utilizing variations of the components separation technique for autologous tissue repair of recalcitrant hernias emphasizes that recurrent or recalcitrant hernias benefit from the creation of a dynamic abdominal wall. A total of 389 patients were retrospectively identified as having abdominal wall defects, and 284 of these patients met the selection criteria. Study patients were grouped according to the type of surgical repair used. The recurrence rate was 20.7 percent over all study groups and was directly related to the extent of repair required. Group 1 patients (wide tissue undermining) had a recurrence rate of only 15 percent, while in group 2 (complete components separation), the recurrence rate was 22 percent. Group 3 patients (interpositional fascia lata graft) had a 29 percent recurrence rate. Time to recurrence was also significantly different across treatment groups, with study group 3 experiencing earlier hernia recurrence. The most frequent postoperative complication was wound infection, which was directly related to the repair performed. The relative odds of recurrence versus the risk factors of age, sex, perioperative steroid use, wound infection, defect size, and the presence of enterocutaneous fistula were studied with a logistic regression analysis. These factors did not possess statistical significance for predicting hernia recurrence. The preoperative presence of mesh was independently significant for hernia recurrence, increasing the relative odds 2.2 times (p = 0.01). Similarly, when other risk factors were controlled for, increasing the complexity of the treatment group, from study group 1 (wide tissue undermining) to study group 3 (interpositional fascia lata graft), also increased the odds of hernia recurrence 1.5-fold per group (p = 0.04). Average inpatient cost was $24,488. The length of inpatient stay ranged from 2 to 172 days (average, 12.8 days). The length of inpatient stay and costs were directly related to the extent of repair required. Using the analysis of variance test for multiple factors, the presence of an enterocutaneous fistula (p = 0.0014) or a postoperative wound infection (p = 0.008) independently increased the length of inpatient stay and hospital costs. A total of 108 successfully repaired patients were contacted by telephone and agreed to participate in a self-reported satisfaction survey. The patients noticed improvements in the appearance of their abdomen, in their postoperative emotional state, and in their ability to lift objects, arise from a chair or a bed, and exercise. These results suggest that recalcitrant hernia defects should be solved, when possible, by reconstructing a dynamic abdominal wall.


Assuntos
Hérnia Ventral/cirurgia , Músculos Abdominais/cirurgia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Custos e Análise de Custo , Fascia Lata/transplante , Feminino , Hérnia Ventral/economia , Humanos , Masculino , Pessoa de Meia-Idade , Complicações Pós-Operatórias , Recidiva , Reoperação , Estudos Retrospectivos , Fatores de Risco , Transplante de Pele , Telas Cirúrgicas , Infecção da Ferida Cirúrgica , Transplante Autólogo
15.
Plast Reconstr Surg ; 119(4): 1238-1246, 2007 Apr 01.
Artigo em Inglês | MEDLINE | ID: mdl-17496596

RESUMO

BACKGROUND: Synthetic mesh is used for chest wall reconstruction, but infection or exposure can occur and necessitate removal. Human acellular dermal matrix (AlloDerm) has been used to reconstruct musculofascial defects in the trunk with low infection and herniation rates. AlloDerm may have advantages over synthetic mesh for chest wall reconstruction. This study compared outcomes and repair strengths of AlloDerm to expanded polytetrafluoroethylene mesh used for repair of rib cage defects. METHODS: A 3 x 3-cm, full-thickness, lateral rib cage defect was created in each rabbit and repaired with expanded polytetrafluoroethylene (n = 8) or acellular dermal matrix (n = 9). At 4 weeks, the animals were euthanized and evaluated for lung herniation/dehiscence, strength of adhesions between the implant and intrapleural structures, and breaking strength of the implant materials and the implant-fascia interface. Tissue sections were analyzed with histologic and immunohistochemical staining to evaluate cellular infiltration and vascularization. RESULTS: No herniation or dehiscence occurred with either material. The incidence and strength of adhesions was similar between materials. The mean breaking strength of the AlloDerm-fascia interface (14.5 +/- 8.9 N) was greater than the expanded polytetrafluoroethylene-fascia interface (8.7 +/- 4.4 N; p = 0.027) and similar to the rib-intercostal-rib interface of the contralateral native chest wall (14.0 +/- 5.6 N). The AlloDerm grafts became infiltrated with cells and vascularized after implantation. CONCLUSIONS: AlloDerm used for chest wall reconstruction results in greater implant-defect interface strength than expanded polytetrafluoroethylene. The ability of AlloDerm to become vascularized and remodeled by autologous cells and to resist infection may be advantageous for chest wall reconstruction.


Assuntos
Colágeno/uso terapêutico , Procedimentos de Cirurgia Plástica/métodos , Telas Cirúrgicas , Parede Torácica/cirurgia , Animais , Modelos Animais de Doenças , Masculino , Politetrafluoretileno , Coelhos , Fatores de Risco , Sensibilidade e Especificidade , Resistência à Tração , Traumatismos Torácicos/cirurgia , Cicatrização/fisiologia
16.
Ann Plast Surg ; 57(4): 435-9, 2006 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16998338

RESUMO

Implantable ventricular-assist devices (VADs) have been approved for use both as a bridge to heart transplantation and as a destination therapy. Rising numbers of patients are surviving with these devices for several years. However, infections of these foreign bodies are serious and frequent complications, often requiring removal of the implant, with serious health consequences. Given the increased use of VADs as life-preserving destination therapy, explantation of these devices in the face of infection is impractical. We evaluated and successfully treated 2 patients with VAD pocket infections referred by the cardiac surgery service at our institution using aggressive surgical and pharmacologic therapy, with the goal of preserving the VADs. However, this is still a largely unsolved dilemma requiring further exploration into prevention and treatment since these devastating infections will likely become a more frequent reconstructive challenge.


Assuntos
Coração Auxiliar/efeitos adversos , Infecções Relacionadas à Prótese/tratamento farmacológico , Infecções Relacionadas à Prótese/cirurgia , Idoso , Antibacterianos/uso terapêutico , Terapia Combinada , Remoção de Dispositivo , Evolução Fatal , Humanos , Masculino , Pessoa de Meia-Idade , Infecções Relacionadas à Prótese/etiologia , Retalhos Cirúrgicos
17.
Ann Plast Surg ; 56(2): 133-8, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16432319

RESUMO

BACKGROUND: This cadaver study investigates the efficacy and safety of the Biomet knife and technique for percutaneous A1 pulley release. We also evaluate the anatomic relationship between specific palmar surface landmarks and relevant underlying structures and identify differences between genders. METHODS: Eighty percutaneous A1 pulley releases, excluding the thumb, were performed on 20 fresh human cadaver hands (10 male, 10 female). RESULTS: Complete release was obtained in 60 of 80 fingers. Success rates for each surgeon improved markedly as the study progressed. There were no significant differences between males and females regarding the distance between a standardized incision site and the proximal edge of the A1 pulley. CONCLUSIONS: A learning curve exists for percutaneous A1 pulley release using the Biomet knife and technique. The extended distal palmar crease is a reasonable incision site for percutaneous release of the index, middle, and ring A1 pulleys in both men and women as the A1 pulley begins just distal to this surface landmark.


Assuntos
Articulações dos Dedos/cirurgia , Mãos/anatomia & histologia , Caracteres Sexuais , Tendões/cirurgia , Tenossinovite/cirurgia , Feminino , Humanos , Masculino , Procedimentos Ortopédicos/instrumentação , Procedimentos Ortopédicos/métodos , Instrumentos Cirúrgicos , Tendões/anatomia & histologia , Tenossinovite/patologia
18.
Breast J ; 12(5): 442-5, 2006.
Artigo em Inglês | MEDLINE | ID: mdl-16958963

RESUMO

Seroma formation is common following mastectomy and autologous breast reconstruction and is a potential cause of significant morbidity in patients. For this reason, many methods have been investigated to prevent this complication. BD Cell-Tak is a tissue adhesive formulated from the proteins excreted by the marine mussel Mytilus edulis. The purpose of this study was to determine if Cell-Tak is able to prevent seroma formation in a rat mastectomy seroma model. Twenty Sprague-Dawley rats underwent unilateral radical mastectomy, partial axillary lymph node dissection, and disruption of the dermal lymphatics. The animals were randomly assigned to either control (n = 10) or experimental groups (n = 10). The experimental animals received 0.3 ml of the topical adhesive in the wound prior to closure, whereas control animals received no treatment. On postoperative day 7, seroma collections were aspirated and quantified and the tissue flaps were sent for histologic analysis. The control rats had a mean seroma volume of 5.3 +/- 2.6 ml, whereas the rats treated with Cell-Tak tissue adhesive had a mean seroma volume of 1.8 +/- 1.5 ml (p < 0.004). Histologic analysis revealed mild inflammation consistent with postoperative changes in both groups and no evidence of foreign body reaction to the adhesive. BD Cell-Tak tissue adhesive significantly reduces seroma formation in the rat mastectomy model. This tissue adhesive may prove beneficial in patients undergoing mastectomy with or without breast reconstruction.


Assuntos
Mastectomia/efeitos adversos , Mytilus edulis/química , Proteínas/química , Seroma/etiologia , Seroma/prevenção & controle , Animais , Modelos Animais de Doenças , Masculino , Mastectomia/métodos , Mytilus edulis/metabolismo , Proteínas/metabolismo , Distribuição Aleatória , Ratos , Ratos Sprague-Dawley , Adesivos Teciduais/farmacologia , Resultado do Tratamento , Cicatrização
19.
Ann Plast Surg ; 55(3): 304-9, 2005 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-16106172

RESUMO

Reconstructed nipples rapidly lose projection. We describe the use of human acellular dermal matrix (ADM) to improve long-term projection of nipple flaps. Athymic rats were randomized to 3 groups; each received 2 nipples: bell flap (control, n = 16 nipples), bell flap with a cylinder of implanted ADM (n = 24), or bell flap with intraflap injection of micronized ADM (MADM) (n = 10). Seven of 24 ADM nipples extruded (30%). By 12 weeks, the control nipples maintained 44% of initial projection compared with 70% for ADM nipples (P = 0.000025). The MADM nipples maintained 49% of initial projection after 12 weeks (P = 0.55 compared with control). No MADM nipples extruded. ADM grafts maintain long-term projection better than local tissue flaps alone. We hypothesize that MADM may limit extrusion and allow for serial injection of nipples. Based on the promising results of this study, clinical trials are warranted using human ADM and/or human MADM for nipple reconstruction.


Assuntos
Derme/transplante , Matriz Extracelular/transplante , Mamilos/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Animais , Neoplasias da Mama/cirurgia , Feminino , Ratos , Fatores de Tempo
20.
Ann Plast Surg ; 50(1): 38-42, 2003 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-12545107

RESUMO

Orbital exenteration is a disfiguring operation that involves the total removal of the orbital contents with partial or total excision of the eyelids. Common methods of orbit reconstruction include pectoralis musculocutaneous pedicled flap and free tissue transfer. The purpose of this study is to illustrate that the entire temporalis muscle may be used by creating a large window in the lateral orbit, without resection of the lateral orbital rim. Orbital exenteration was performed on four cadavers. A window was created in the lateral orbit using a 4-mm pineapple burr. Three parameters were measured: (1) the distance between the zygomatic arch to the superior aspect of the temporalis muscle; (2) the width of the temporalis muscle; and (3) the length and width of the lateral orbit window. The free edge of the transposed temporal muscle was then sutured to the skin edge around the bony orbit. This procedure was then performed on a 73-year-old man who had undergone right orbital exenteration for ocular melanoma and then postoperative radiation. The dimensions of the bony windows in the cadavers were as follows: mean 3.3 cm (SD +/- 0.19 cm) x 1.9 cm (SD +/- 0.18 cm), n = 4. The dimensions of the temporalis muscle in the cadavers were the following: mean 8.45 cm (SD +/- 0.60 cm) x 10.5 cm (SD +/- 0.33 cm), n = 4. In the patient, the size of the bony window was 3.7 cm x 2.1 cm (n = 1), and the dimensions of the temporalis muscle were 8.1 cm x 10.2 cm (n = 1). The patient recovered well without complication, with a well-healed skin graft over the top of the muscle flap. An adequate bony window can be made to allow transfer of the entire temporalis muscle for orbital reconstruction without resecting the lateral orbital rim or entering the middle cranial fossa. This option is a good alternative to the other commonly performed methods of orbital reconstruction because of its completion in one operative stage, short operative time, and minimal donor site morbidity.


Assuntos
Exenteração Orbitária , Órbita/cirurgia , Procedimentos de Cirurgia Plástica/métodos , Retalhos Cirúrgicos , Idoso , Humanos , Masculino
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