Asunto(s)
Trasplante de Riñón/métodos , Trasplante de Hígado/métodos , Metanol/envenenamiento , Obtención de Tejidos y Órganos , Adolescente , Biopsia con Aguja , Muerte Encefálica , Rechazo de Injerto , Supervivencia de Injerto , Humanos , Inmunohistoquímica , Trasplante de Riñón/efectos adversos , Trasplante de Hígado/efectos adversos , Masculino , Cuidados Preoperatorios , Pronóstico , Medición de Riesgo , Muestreo , Tasa de Supervivencia , Adulto JovenRESUMEN
In general, there is no perfect method for esophageal replacement under consideration of the numerous associated risks and complications. The aim of this study was to examine a new material--small intestinal submucosa (SIS)--in alloplastic esophageal replacement. We implanted tubular SIS prosthesis about 4 cm in length in the cervical esophagus of 14 piglets (weight 9-13 kg). For the first 10 days, the animals were fed parenterally, supplemented by free given water, followed by an oral feeding phase. Four weeks after surgery, the animals were sacrificed. Only 1 of the 14 animals survived the study period of 4 weeks. The other piglets had to be sacrificed prematurely because of severe esophageal stenosis. On postmortem exploration, the prosthesis could not be found either macroscopically or histologically. Sutures between the prosthesis and the cervical muscles did not improve the results. Until now, the use of alloplastic materials in esophageal replacement has failed irrespective of the kind of material. As well as in our experiments, severe stenosis had been reported in several animal studies. The reasons for this unacceptable high rate of stenosis after alloplastic esophageal replacement seem to be multifactorial. Possible solutions could be transanastomotic splints, less inert materials, the decrease of anastomotic tension by stay sutures, the use of adult stem cells, and tissue engineering.
Asunto(s)
Bioprótesis , Esofagoplastia/instrumentación , Esófago/cirugía , Mucosa Intestinal/trasplante , Intestino Delgado/trasplante , Animales , Animales Recién Nacidos , Estenosis Esofágica/etiología , Estenosis Esofágica/patología , Esofagoplastia/efectos adversos , Esofagoscopía , Esófago/patología , Gastroscopía , Diseño de Prótesis , Técnicas de Sutura , Porcinos , Factores de TiempoRESUMEN
Disabling pansclerotic morphea of childhood (DPMC) is a rare and severe variant of scleroderma. This report presents 3 cases that presented to the authors and studies 25 patients from the literature (English language only) for the presence of chronic nonhealing ulcers of skin and skin cancer. The authors identified a total of 30 patients (9 male and 21 female) aged between 1 and 37 years at time of presentation. All cases were less than 14 years old when the disease started. The majority of patients had an aggressive course with deep sclerotic lesions leading to joint contractures and immobility. Five patients suffered from chronic nonhealing leg ulcers (17%), but ulcers were present on other parts of the body (upper limbs, trunk, head) as well (n = 6). Four patients died because of complications of the disease such as sepsis or gangrene. Two patients developed a squamous cell carcinoma at the age of 16 years and 19 years, respectively (6.7%). The available treatment of DMPC-associated ulcers is unsatisfying. Only temporary improvements have been seen in a minority of patients. We report on marked improvement of chronic leg ulcers by a combination of sildenafil 3 x 20 mg/day and repeated application of a porcine small intestinal submucosal acellular matrix.