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1.
Acta cir. bras ; 34(11): e201901107, Nov. 2019. graf
Article in English | LILACS | ID: biblio-1054678

ABSTRACT

Abstract Purpose: To establish a hypotensive brain death pig model and observe the effects of hypotension on small bowel donors. Methods: The hypotensive brain death model was produced using the modified intracranial water sac inflation method in ten domestic crossbred pigs. Effects of hypotensive brain death on small bowel tissue morphology were evaluated through changes in intestinal tissue pathology, tight junction protein of the intestinal mucosa and plasma intestinal fatty acid-binding protein (i-FABP) levels. The pathophysiological mechanism was examined based on changes in superior mesenteric artery (SMA) blood flow and systemic hemodynamics. Results: After model establishment, SMA blood flow, and the mean arterial pressure (MAP) significantly decreased, while heart rate increased rapidly and fluctuated significantly. Small bowel tissue morphology and levels of tight junction protein of the intestinal mucosa showed that after model establishment, small bowel tissue injury was gradually aggravated over time (P<0.05). Plasma i-FABP levels significantly increased after brain death (P<0.05). Conclusions: A hypotensive brain death pig model was successfully established using an improved intracranial water sac inflation method. This method offers a possibility of describing the injury mechanisms more clearly during and after brain death.


Subject(s)
Animals , Male , Female , Brain Death/physiopathology , Disease Models, Animal , Hypotension/physiopathology , Intestine, Small/pathology , Intestine, Small/transplantation , Swine , Time Factors , Biopsy , Enzyme-Linked Immunosorbent Assay , Blotting, Western , Reproducibility of Results , Microscopy, Electron, Transmission , Fatty Acid-Binding Proteins/blood , Zonula Occludens-1 Protein/analysis , Hemodynamics , Intestine, Small/blood supply
2.
Acta cir. bras ; 31(10): 675-679, Oct. 2016. graf
Article in English | LILACS | ID: biblio-827651

ABSTRACT

ABSTRACT PURPOSE: To evaluate the effect of remote ischemic preconditioning (IPC-R) in the fetal small bowel transplantation model. METHODS: Two groups were constituted: The Isogenic transplant (ISO, C57BL/6 mice, n=24) and the allogenic transplant (ALO, BALB/c mice, n=24). In each group, the animals were distributed with and without IPC-R. It was obtained the following subgroups: Tx, IPC-R, Fk, IPC-Fk, in both strains. Intestinal grafts were stained with hematoxylin and eosin and immunohistochemically. RESULTS: The graft development evaluation in ISO group showed that IPC-R reduced the development compared with ISO-Tx (5.2±0.4 vs 9.0±0.8) and IPC-R-Fk increased the graft development compared with IPC-R (11.2±0.7 and 10.2±0.8). In ALO group, IPC-Fk increased the development compared with ALO-Tx and ALO with IPC-R (6.0±0.8, 9.0±1.2, 0.0±0.0, 0.5±0.3). The PCNA expression was increased in ISO group treated with Fk and IPC-R compared to other groups (12.2±0.8 vs Tx: 8.8±0.9, IPC-R: 8.0±0.4 and Fk: 9.0±0.6). The graft rejection was lower in groups treated with IPC-R (-18%), Fk (-68%) or both (-61%) compared with ALO-Tx. CONCLUSION: Remote ischemic preconditioning showed benefic effect even associate with Tacrolimus on the development and acute rejection of the fetal small bowel graft in the Isogenic and Allogenic transplants.


Subject(s)
Animals , Male , Female , Mice , Fetal Tissue Transplantation/methods , Tacrolimus/therapeutic use , Ischemic Preconditioning/methods , Immunosuppressive Agents/therapeutic use , Intestine, Small/blood supply , Intestine, Small/transplantation , Time Factors , Transplantation, Isogeneic , Immunohistochemistry , Reproducibility of Results , Treatment Outcome , Cell Proliferation/drug effects , Graft Rejection/prevention & control , Mice, Inbred BALB C , Mice, Inbred C57BL
3.
Clinics ; 70(5): 369-372, 05/2015. tab, graf
Article in English | LILACS | ID: lil-748271

ABSTRACT

OBJECTIVES: The ability of the Timed Up and Go test to predict sarcopenia has not been evaluated previously. The objective of this study was to evaluate the accuracy of the Timed Up and Go test for predicting sarcopenia in elderly hospitalized patients. METHODS: This cross-sectional study analyzed 68 elderly patients (≥60 years of age) in a private hospital in the city of Salvador-BA, Brazil, between the 1st and 5th day of hospitalization. The predictive variable was the Timed Up and Go test score, and the outcome of interest was the presence of sarcopenia (reduced muscle mass associated with a reduction in handgrip strength and/or weak physical performance in a 6-m gait-speed test). After the descriptive data analyses, the sensitivity, specificity and accuracy of a test using the predictive variable to predict the presence of sarcopenia were calculated. RESULTS: In total, 68 elderly individuals, with a mean age 70.4±7.7 years, were evaluated. The subjects had a Charlson Comorbidity Index score of 5.35±1.97. Most (64.7%) of the subjects had a clinical admission profile; the main reasons for hospitalization were cardiovascular disorders (22.1%), pneumonia (19.1%) and abdominal disorders (10.2%). The frequency of sarcopenia in the sample was 22.1%, and the mean length of time spent performing the Timed Up and Go test was 10.02±5.38 s. A time longer than or equal to a cutoff of 10.85 s on the Timed Up and Go test predicted sarcopenia with a sensitivity of 67% and a specificity of 88.7%. The accuracy of this cutoff for the Timed Up and Go test was good (0.80; IC=0.66-0.94; p=0.002). CONCLUSION: The Timed Up and Go test was shown to be a predictor of sarcopenia in elderly hospitalized patients. .


Subject(s)
Adolescent , Adult , Child , Child, Preschool , Female , Humans , Infant , Male , Middle Aged , Young Adult , Graft Rejection/etiology , Graft Rejection/mortality , Ileum/microbiology , Intestine, Small/transplantation , Intestines/microbiology , Postoperative Complications , /genetics , Follow-Up Studies , Graft Rejection/diagnosis , Intestine, Small/pathology , Intestine, Small/surgery , Metagenome/genetics , Prognosis , Prospective Studies , Risk Factors , Survival Rate
4.
Acta cir. bras ; 30(2): 143-150, 02/2015. tab
Article in English | LILACS | ID: lil-741026

ABSTRACT

PURPOSE: To evaluate the current model of small bowel resection and intestinal transplantation in pigs. METHODS: Forty two Large White pigs were distributed in five groups: G1(n=6), G2(n=6) and G3(n=6) were submitted to 80%,100% and 100% plus right colon resection respectively and G4(n=7) and G5(n=5) to 100% SBR plus IT without and with immunosuppression based on Tacrolimus and Mycophenolic acid. Evaluation included weight control, clinical status, biochemical analysis and endoscopies for graft biopsies. Follow-up in G1 and 2 was 84 days, while in G3, four and five was ± three weeks. RESULTS: G1 increased weight suggesting adaptation while G2 and 3 loused weight and inadequate adaptation. G4 and 5 died of acute cellular rejection (ACR) and sepses respectively. Overall survival in G1, 2, 3, 4 and 5 at 30 days was 100, 100, 0 and 20 %, respectively. Medium survival in G4 and 5 was 14 and 16 days. CONCLUSIONS: The resection of 80% of small intestine in pigs is not suitable for short bowel syndrome induction. Intestinal transplantation with the proposed immunosuppression protocol was effective in prevent the occurrence of severe acute rejection, but inappropriate to increase recipients survival. .


Subject(s)
Animals , Female , Male , Intestine, Small/transplantation , Models, Animal , Short Bowel Syndrome/surgery , Biopsy , Body Weight , Cholesterol/blood , Graft Rejection/pathology , Immunosuppression Therapy/methods , Immunosuppressive Agents/blood , Immunosuppressive Agents/therapeutic use , Intestine, Small/pathology , Organ Transplantation/methods , Proteins/analysis , Reproducibility of Results , Swine , Short Bowel Syndrome/etiology , Time Factors , Treatment Outcome , Triglycerides/blood
5.
ABCD (São Paulo, Impr.) ; 26(3): 223-229, jul.-set. 2013. ilus
Article in Portuguese | LILACS | ID: lil-689682

ABSTRACT

INTRODUÇÃO: O transplante de intestino delgado, em razão de sua complexidade, apresentou evolução mais lenta que os demais órgãos sólidos. Diversos avanços permitiram sua aplicação clínica. OBJETIVO: Revisão da evolução do transplante de intestino delgado e seu estado atual. MÉTODO: levantamento bibliográfico nas bases de dados MEDLINE e ScIELO. Os termos usados como descritores foram: intestinal failure, intestinal transplant, small bowel transplant, multivisceral transplant. Foram analisados dados sobre evolução histórica, centros, indicações, tipos de enxertos, seleção e captação de órgãos, manejo pós-operatório, complicações e resultados. CONCLUSÃO: Apesar de desenvolvimento mais lento, o transplante intestinal é hoje a terapia para pacientes portadores de falência intestinal irreversível que apresentam complicações da nutrição parenteral. Envolve algumas modalidades: intestino delgado isolado, fígado-intestino, multivisceral e multivisceral modificado. Atualmente a sobrevida é semelhante aos demais órgãos sólidos. A maioria dos pacientes fica livre da nutrição parenteral.


BACKGROUND: Small bowel transplantation evolution, because of its complexity, was slower than other solid organs. Several advances have enabled its clinical application. AIM: To review intestinal transplantation evolution and its current status. METHOD: Search in MEDLINE and ScIELO literature. The terms used as descriptors were: intestinal failure, intestinal transplantation, small bowel transplantation, multivisceral transplantation. Were analyzed data on historical evolution, centers experience, indications, types of grafts, selection and organ procurement, postoperative management, complications and results. CONCLUSION: Despite a slower evolution, intestinal transplantation is currently the standard therapy for patients with intestinal failure and life-threatening parenteral nutrition complications. It involves some modalities: small bowel transplantation, liver-intestinal transplantation, multivisceral transplantation and modified multivisceral transplantation. Currently, survival rate is similar to other solid organs. Most of the patients become free of parenteral nutrition.


Subject(s)
Humans , Intestine, Small/transplantation , Digestive System Surgical Procedures/methods , Organ Transplantation/methods
6.
Clinics ; 67(8): 871-875, Aug. 2012. graf, tab
Article in English | LILACS | ID: lil-647788

ABSTRACT

OBJECTIVE: The aim of this study was to compare female sexual function after surgical treatment of anterior vaginal prolapse with either small intestine submucosa grafting or traditional colporrhaphy. METHODS: Subjects were randomly assigned, preoperatively, to the small intestine submucosa graft (n = 29) or traditional colporrhaphy (n = 27) treatment group. Postoperative outcomes were analyzed at 12 months. The Female Sexual Function Index questionnaire was used to assess sexual function. Data were compared with independent samples or a paired Student's t-test. RESULTS: In the small intestine submucosa group, the total mean Female Sexual Function Index score increased from 15.5±7.2 to 24.4±7.5 (p<0.001). In the traditional colporrhaphy group, the total mean Female Sexual Function Index score increased from 15.3±6.8 to 24.2±7.0 (p<0.001). Improvements were noted in the domains of desire, arousal, lubrication, orgasm, satisfaction, and pain. There were no differences between the two groups at the 12-month follow-up. CONCLUSIONS: Small intestine submucosa repair and traditional colporrhaphy both improved sexual function postoperatively. However, no differences were observed between the two techniques.


Subject(s)
Female , Humans , Middle Aged , Intestine, Small/transplantation , Sexual Dysfunction, Physiological , Sexual Behavior/physiology , Uterine Prolapse/surgery , Vagina/surgery , Gynecologic Surgical Procedures/methods , Postoperative Complications , Postoperative Period , Pelvic Floor/surgery , Quality of Life , Statistics, Nonparametric , Surveys and Questionnaires , Sexual Dysfunction, Physiological/etiology , Sexual Dysfunction, Physiological/psychology , Treatment Outcome
7.
Oman Medical Journal. 2012; 27 (6): 497-500
in English | IMEMR | ID: emr-155721

ABSTRACT

Microvillous Inclusion Disease [MVID] is one of the congenital diarrheal disorders [CDD] caused by genetic defects in enterocyte differentiation and polarization. Its prevalence is higher in countries with a high degree of consanguinity. It causes severe, intractable secretory diarrhea leading to permanent and definitive intestinal failure with resultant dependency on parenteral nutrition [PN]. Small bowel transplantation is the only curative treatment. The gold standard for diagnosis are the typical morphological abnormalities in small bowel biopsies on light and electron microscopy [EM]. In recent times, histochemistry and immunohistochemistry have shown sufficient diagnostic accuracy replacing EM if the facility is unavailable or EM findings are inconclusive. We describe a neonate with CDD who was diagnosed to have MVID on the duodenal biopsy by morphohistochemical and immunophenotypic methods used for the first time in Oman. By utilizing such easy and accessible diagnostic methods, a rare genetic disorder could be diagnosed with certainty and the family could be counseled accordingly. With a high degree of consanguinity in the region, the prevalence of MVID in Oman needs to be identified once these patients are diagnosed by utilizing appropriate investigations. Care of such patients necessitates improving current parenteral nutrition services and addressing the future need for small bowel transplantation [SBTx], in Oman


Subject(s)
Humans , Female , Infant, Newborn , Microvilli/pathology , Mucolipidoses , Intestine, Small/pathology , Intestine, Small/transplantation , Biopsy
8.
Journal of Veterinary Science ; : 327-330, 2012.
Article in English | WPRIM | ID: wpr-65158

ABSTRACT

Here, we describe two dogs in which canine small intestinal submucosa (SIS) was implanted as a biomaterial scaffold during perineal herniorrhaphy. Both dogs had developed severe muscle weakness, unilaterally herniated rectal protrusions, and heart problems with potential anesthetic risks. Areas affected by the perineal hernia (PH) located between the internal obturator and external anal sphincter muscles were reconstructed with naive canine SIS sheets. In 12 months, post-operative complications such as wound infections, sciatic paralysis, rectal prolapse, or recurrence of the hernia were not observed. Symptoms of defecatory tenesmus also improved. Neither case showed any signs of rejection or specific immune responses as determined by complete and differential cell counts. Our findings demonstrate that canine SIS can be used as a biomaterial scaffold for PH repair in dogs.


Subject(s)
Animals , Dogs , Male , Biocompatible Materials , Dog Diseases/surgery , Hernia, Abdominal/surgery , Herniorrhaphy/veterinary , Intestinal Mucosa/transplantation , Intestine, Small/transplantation , Perineum/surgery , Postoperative Complications/veterinary , Transplantation, Homologous/veterinary
9.
Acta cir. bras ; 26(6): 496-502, Nov.-Dec. 2011. ilus
Article in English | LILACS | ID: lil-604200

ABSTRACT

PURPOSE: To investigate the clinical evolution of orthotopic small bowel transplantation in outbred rats. METHODS: Seventy-two outbred Wistar rats weighting from 250 to 300g were used as donor and recipient in 36 consecutives ortothopic small intestine transplantation without immunosuppression. The graft was transplanted into the recipient using end-to-side aortic and portacaval microvascular anastomosis. Procedure duration, animal clinical course and survival were evaluated. Survival shorter than four days was considered technical failure. Recipients were sacrificed with signs of severe graft rejection or survival longer than 120 days. Necropsies were performed in all recipients to access histopathological changes in the graft. RESULTS: Median time for the procedure was 107 minutes. Six recipients (16.7 percent) presented technical failure. Twenty-seven recipients were sacrificed due to rejection, being nineteen (52.7 percent) between 7th and 15th postoperative day and eight (22.2 percent) between 34th and 47th postoperative day. Graft histology confirmed severe acute cellular rejection in those recipients. Uneventful evolution and survival longer than 120 days without rejection were observed in three recipients (8.3 percent). CONCLUSION: Intestinal transplantation in outbred rats without immunosuppressant regiment accomplishes variable clinical evolution.


OBJETIVO: Investigar a evolução clínica do transplante de intestino delgado ortotópico em ratos não-isogênicos. MÉTODOS: Setenta e dois ratos Wistar não-isogênicos, com peso variando entre 250 e 300g, foram utilizados como doadores e receptores em 36 transplantes ortotópicos de intestino delgado sem regime de imunossupressão. Os enxertos foram implantados nos receptores por meio de anastomose microvascular término-lateral aorta-aorta e porto-cava. A duração do procedimento, evolução clínica dos animais e sobrevida foram avaliados. Sobrevida menor que quatro dias foi considerada falha técnica. Os receptores foram sacrificados quando apresentaram sinais de rejeição grave do enxerto ou sobrevida maior que 120 dias. Necropsias foram realizadas em todos os receptores para avaliar alterações histopatológicas no enxerto. RESULTADOS: O tempo médio para o procedimento foi de 107 minutos. Seis receptores (16,7 por cento) apresentaram falha técnica Vinte e sete receptores (75 por cento) foram sacrificados por rejeição sendo dezenove (52,7 por cento) entre o 7º e 15º dia de pós-operatório e oito (22,2 por cento) entre o 34º e 47º. Análise histopatológica confirmou rejeição celular aguda severa nesses recipientes. Evolução sem complicações e sobrevida maior que 120 dias sem sinais de rejeição foi observada em três receptores (8,3 por cento). CONCLUSÃO: O transplante de intestino delgado ortotópico em ratos Wistar não-isogênicos sem regime de imunossupressão apresenta evolução clínica variada.


Subject(s)
Animals , Male , Rats , Graft Rejection/pathology , Intestine, Small/transplantation , Acute Disease , Graft Rejection/mortality , Intestine, Small/pathology , Models, Animal , Rats, Wistar/classification , Severity of Illness Index , Time Factors
10.
Rev. med. (Säo Paulo) ; 88(3/4): 207-218, jul.-dez. 2009. ilus
Article in Portuguese | LILACS | ID: lil-556387

ABSTRACT

Introdução: A necessidade de sutura microvascular complexa dificulta a pesquisa do transplante intestinal no rato. A técnica de microanastomose com dispositivo tubular (cuff) é simples, porém, a persistência do dispositivo na anastomose desencadeia reação de corpo estranho e trombose. Neste trabalho descrevemos um modelo de transplante intestinal no rato com nova técnica de anastomose sem sutura com cuff e cola...


Introduction: Microsurgical difficulties hamper intestinal transplantation in the rat. Cuff anastomosis is a simple microanastomosis technique, but the tube inside anastomosis grounds foreign body reaction and thrombosis. We describe an intestinal transplantation in the rat using a new microanastomosis using adhesive called Cuff-Glue...


Subject(s)
Animals , Rats , Anastomosis, Surgical , Intestine, Small/transplantation , Microsurgery , Organ Transplantation , Rats, Wistar
11.
Acta cir. bras ; 24(2): 128-135, Mar.-Apr. 2009. ilus, graf, tab
Article in English | LILACS | ID: lil-511327

ABSTRACT

PURPOSE: To assess intraperitoneal adhesion formation in rats after the single implantation of intraperitoneal polypropylene mesh versus SIS mesh, and the effect of PAF as a polypropylene mesh barrier. METHODS: A total of 55 albino rats randomized into three groups were assessed. The type of adhesions, the percentage of mash covered with adhesions, and the rupture strength of the adhesions were evaluated. RESULTS: The type 2 and 3 adhesions were more frequent in group 1 (polypropylene mesh) and group 3 (Polypropylene+PAF), while type 0 and 1 adhesions were more frequent in group 2 (SIS). The mean rupture strength was 1,58 N (±0,719N) in group 1, 0,42 N (±0,432N) in group 2 and 1,23 N (±0,432N) in group 3. Over 50% of the mash was covered with adhesions in 12 (80%) cases of the group 1, in 4 (20%) cases of the group 2 and in 16 (84,2%) cases of the group 3. Group 2 differed significantly (p<0.001) from the other groups. CONCLUSIONS: Implantation of intraperitoneal polypropylene mesh yielded higher rates of adhesion and the use of PAF as a mesh barrier didn't reduced the rates of adhesion. SIS mesh implantation revealed lower rates of peritoneal adhesions.


OBJETIVO: Avaliar a formação de aderência intraperitoneal em ratos após o implante peritoneal da tela de polipropileno comparada à tela de SIS, e o efeito do PAF como barreira anti-aderente à tela de polipropileno. MÉTODOS: 55 ratos albinos foram randomizados em três grupos. O tipo de aderência, o percentual de tela coberta por aderência, e a força de rupturas das aderências foram avaliadas. RESULTADOS: Os tipos de aderência 2 e 3 foram mais freqüentes no grupo 1 (polipropileno) e no grupo 3 (polipropileno+PAF); as do tipo 0 e 1 foram mais freqüentes no grupo 2 (SIS). A força media de ruptura foi de 1,58N (±0,719N) no grupo 1, 0,42N (±0,432N) no grupo 2 e 1,23N (±0,432N) no grupo3. Mais de 50% da tela estava coberta por aderências em 12 (80%) casos do grupo 1, em 4 (20%) casos do grupo 2 e em 16 (84,2%) casos do grupo 3. O grupo 2 foi significativamente diferente (p<0.001) dos outros grupos. CONCLUSÕES: O uso intraperitoneal da tela de polipropileno levou a elevados índices de aderência, e o uso de PAF como barreira anti-aderente não reduziu os índices de aderência. O implante intraperitoneal de SIS revelou índices baixos de aderências peritoneais.


Subject(s)
Animals , Rats , Intestinal Mucosa/transplantation , Intestine, Small/transplantation , Peritoneal Diseases/etiology , Polypropylenes/adverse effects , Postoperative Complications/etiology , Surgical Mesh/adverse effects , Analysis of Variance , Chi-Square Distribution , Peritoneal Diseases/prevention & control , Random Allocation , Rats, Wistar , Swine , Tissue Adhesions/etiology , Tissue Adhesions/prevention & control
12.
Rev. méd. Chile ; 137(2): 259-263, feb. 2009. ilus, tab
Article in Spanish | LILACS | ID: lil-516092

ABSTRACT

Small bowel transplantation is associated with a patient survival atone and five years, of 80% and 63%, respectively. We report a 36 year-old female with short bowel syndrome, subjected to the first small bowel transplantation performed in Chile. A cadaveric graft was used. Immunosuppression was achieved by means of alemtuzumab, tacrolimus, sirolimus, micofenolate mofetil and steroids. Serial endoscopies and biopsies were performed during sevenmonths after transplantation. The most important late complications were a drug induced renal failure, infections caused by opportunistic agents and a gastrointestinal bleeding probably induced by drugs. After 29 months of follow up, the patient is ambulatory, on oral diet only, and with no evidence of graft rejection.


Subject(s)
Adult , Female , Humans , Intestine, Small/transplantation , Short Bowel Syndrome/surgery , Chile , Graft Rejection/prevention & control , Immunosuppressive Agents/therapeutic use , Short Bowel Syndrome/immunology , Tacrolimus/therapeutic use
13.
Int. braz. j. urol ; 34(2): 191-197, Mar.-Apr. 2008. tab
Article in English | LILACS | ID: lil-484451

ABSTRACT

OBJECTIVE: Report the results using porcine small intestinal submucosa (SIS) as a graft material in the surgical management of Peyronie's disease (PD). MATERIALS AND METHODS: We performed a retrospective chart review of men with PD who underwent surgical correction of the curvature by plaque “H” incision and patch grafting with 4-ply SIS (Cook, Bloomington, IN) by a single surgeon at our institution. Degree and direction of curvature, sexual function, and co-morbidities were assessed pre- and postoperatively. RESULTS: Thirteen patients were identified. Mean age was 57 ± 8, range 42-70 years. Median follow-up was 14 months, range 3-89 months. At presentation, all reported penile curvature. Also reported were difficulty with vaginal penetration (determined by question number 2 of the sexual encounter profile questionnaire - SEP2), palpable plaque, hourglass deformity, difficulty with firmness, and difficulty with sustaining erection (determined by SEP3) in77 percent, 69 percent, 77 percent, 62 percent, and 46 percent of patients, respectively. Mean and median degrees of curvature of the primary deformity were 71 and 67.5 degrees, respectively. Three patients had secondary curves of less than 30 degrees in a different direction. Mean and median plaque size were 3.5 and 2.7 cm², respectively. Seven patients had one graft and six patients had two grafts placed with a mean size of 15 ± 0 cm². CONCLUSIONS: For the patient with PD, SIS grafting can achieve a functionally straight erection with durable results yet with relatively high rates of erectile dysfunction. SIS is a viable graft material for use in the surgical treatment of PD.


Subject(s)
Adult , Aged , Animals , Humans , Male , Middle Aged , Intestinal Mucosa/transplantation , Intestine, Small/transplantation , Penile Induration/surgery , Surgical Flaps , Erectile Dysfunction/etiology , Follow-Up Studies , Patient Satisfaction , Penile Induration/complications , Retrospective Studies , Swine , Treatment Outcome
14.
Botucatu; s.n; 2008. 99 p. ilus, tab, graf.
Thesis in Portuguese | LILACS | ID: lil-499523

ABSTRACT

Para melhor compreender as alterações hidro-eletrolíticas, metabólicas e nutricionais em animais de grande porte submetidos a ressecções intestinais extensas e transplante intestinal, propusemos o presente estudo no intuito de se estabelecer um modelo experimental para a Síndrome do Intestino Curto e transplantes intestinais em suínos. MÉTODO: Quarenta e dois porcos Landrace - Large White foram ressecados e divididos em cinco grupos: Grupo 1 (n igual 6) 80% ressecção intestinal; Grupo 2 (n igual 6), ressecção intestinal total; Grupo 3 (n igual 6) ressecção intestinal total e de cólon parcial incluindo válvula ileocecal; Grupo 4 (n igual 7) ressecção intestinal total e transplante intestinal sem imunossupressão e Grupo 5 (n igual 5) ressecção intestinal total e transplante intestinal com utilização de tacrolimo e micofenolato de sódio como imunossupressores. O tacrolimo foi administrado por via oral na dose de 0,2 mg/kg/dia e o micofenolato sódico na dose de 15 mg/kg/dia. O nível sérico do tacrolimo foi ajustado para 15-20 ng/ml. O tempo de acompanhamento dos grupos 1 e 2 foi de 84 dias, enquanto nos grupos 3, 4 e 5 foi de aproximadamente 3 semanas. A avaliação pós-operatória incluiu peso semanal, avaliação clinica e análise bioquímica (sódio, potássio, cálcio, glicemia, uréia, creatinina, triglicérides, colesterol total, proteínas totais, albumina e leucograma). Foi realizada endoscopia convencional com biópsia de enxerto semanal para avaliar a rejeição. RESULTADOS: Grupo 1 ganhou peso corpóreo sugerindo adaptação intestinal, os grupos 2 e 3 perderam peso mostrando inadequada adaptação à ressecção intestinal. Os porcos do grupo 4 e 5 morreram de rejeição celular aguda grave e sepse, respectivamente. Só 1 animal no grupo 5 foi à óbito por intussuscepção. A sobrevivência total em grupos 1, 2, 3, 4 e 5 no dia 30 foi 100%, 100%, 0%, 0% e 20%, respectivamente. A sobrevivência mediana no grupo 4 e 5 foi 14 e 16 dias, respectivamente...


Subject(s)
Animals , Intestine, Small/surgery , Intestine, Small/transplantation , Swine , Short Bowel Syndrome/surgery , Short Bowel Syndrome/veterinary
15.
Rev. bras. otorrinolaringol ; 72(2): 195-199, mar.-abr. 2006. ilus
Article in Portuguese | LILACS | ID: lil-434165

ABSTRACT

OBJETIVO: O objetivo do presente estudo consiste em avaliar a regeneração óssea em defeito criado na mandíbula de ratos utilizando dois bioenxertos: hidroxiapatita de cálcio sintética e submucosa de intestino delgado porcina. FORMA DE ESTUDO: Experimental randomizado. MATERIAL E MÉTODO: Foram utilizados 24 ratos da linhagem Wisthar-Furth. Um defeito ósseo de 0,75cm x 1,5cm no corpo de cada hemimandíbula foi realizado em todos os animais com broca esférica de baixa rotação. Padronizou-se à esquerda o preenchimento do defeito ósseo, no grupo I com 15 microgramas de hidroxiapatita e no grupo II com preenchimento de submucosa de intestino delgado porcina (SID), e à direita o não-preenchimento serviu como controle. A eutanásia foi realizada no 40° dia de pós-operatório, após a qual se procederam as análises macroscópicas e histológicas das peças. RESULTADOS: O comprimento médio em milímetros das hemimandíbulas do grupo hidroxiapatita foi de 3,75, e o do grupo SID 3,03 e o do grupo controle foi de 2,63 (p: 0,0022). No grupo hidroxiapatita a neoformação óssea perfez uma área correspondente à 76,64 por cento do total já no grupo SID 63,64 por cento do total. CONCLUSÃO: Os resultados macroscópios e microscópicos foram superiores com a utilização do enxerto de hidroxiapatita quando comparado ao grupo submucosa de intestino delgado porcino. Entretanto os dois bioenxertos mostraram-se osteoindutores quando comparados ao controle.


Subject(s)
Animals , Rats , Hydroxyapatites/therapeutic use , Intestinal Mucosa/transplantation , Osseointegration/physiology , Bone Substitutes/therapeutic use , Mandibular Injuries/surgery , Disease Models, Animal , Intestine, Small/transplantation , Osteogenesis/physiology , Rats, Inbred WF
16.
Acta cir. bras ; 21(supl.1): 67-71, 2006. tab
Article in English, Portuguese | LILACS | ID: lil-438810

ABSTRACT

The introduction of the Total Parenteral Nutrition (TPN) has given rise to a new hope in the treatment of intestinal failure (LF) associated with the Short Bowel Syndrome (SBS). However, together with the TPN and the increase of survival of these patients, new problems and questions have emerged, as well as new therapeutical procedures. Taking into consideration this emerging reality, this paper has the purpose to undertake a review of current concepts and available treatments for patients with IF associated-liver disease. Although TPN provides an increase of survival of patients with intestinal failure, it is a potential source of complication such as: septicemia, hyperglycemia, venous thrombosis and liver disease. There are several hypothesis conceived to explain the liver disease associated to intestinal failure, however the only definite treatment as a potential to reverse the non-cirrhotic liver disease is the small intestine transplantation. Despite indications for intestine transplantation are not entirely defined in literature, the trend is its early indication in high-risk patients, preserving the liver integrity and preventing the eventual need of both liver and intestine transplantations altogether.


A introdução da Nutrição Parenteral Total (NPT) despertou uma nova esperança para o tratamento da falência intestina (FI) associada a Síndrome do Intestino Curto (SIC). No entanto, junto com a NPT e o aumento da sobrevida destes pacientes, novos problemas e perguntas emergiram, assim como novas terapêuticas. Tendo em vista esta realidade emergente, o intuito deste artigo é realizar uma revisão dos conceitos atuais e dos tratamentos disponíveis para pacientes com doença hepática associada a FI. A NPT apesar de proporcionar aumento da sobrevida nos pacientes com falência intestinal é fonte potencial de complicações, como: septicemia, hiperglicemia, trombose venosa e doença hepática. Diversas são as hipóteses aventadas para explicar a doença hepática associada a falência intestinal, no entanto, o único tratamento definitivo, com potencial para reverter à doença hepática não cirrótica, é o transplante de intestino delgado. Apesar das indicações do transplante de intestino não estarem totalmente definidas na literatura, a tendência é indicá-lo precocemente em pacientes de alto risco, preservando a integridade hepática e prevenindo a eventual necessidade de transplante de fígado e intestino combinados.


Subject(s)
Humans , Intestinal Absorption/physiology , Intestinal Diseases/etiology , Intestine, Small/physiopathology , Liver Diseases/complications , Parenteral Nutrition, Total/adverse effects , Short Bowel Syndrome/etiology , Bacterial Translocation , Intestinal Diseases/therapy , Intestine, Small/transplantation , Liver Transplantation , Short Bowel Syndrome/therapy
17.
Arq. gastroenterol ; 42(3): 182-185, jul.-set. 2005. ilus
Article in English | LILACS | ID: lil-412770

ABSTRACT

RACIONAL: O transplante de intestino delgado é atualmente indicado para tratar casos complexos de falência entérica. Transplante intestinal em cão é importante modelo experimental para treino da técnica cirúrgica e para estudar as complicações desse procedimento. Drenagem sistêmica do enxerto é freqüentemente realizada nos transplantes clínicos, embora sua conseqüência seja desconhecida. OBJETIVO: Descrever a técnica cirúrgica e a evolução clínica e histopatológica de modelo de transplante de intestino em cão. MÉTODO: Cães mestiços adultos foram usados como doadores e receptores em 10 transplantes ortotópico de intestino delgado com drenagem mesentérico-cava do enxerto. Exame clínico e verificação do peso corpóreo dos receptores foram realizados diariamente. Sacrifício sob anestesia e necropsia foi realizado quando os animais apresentavam estado clínico precário (postura letárgica, diarréia, e perda de peso maior do que 35%) ou óbito, para determinação do diagnóstico. RESULTADOS: Três recipientes morreram antes do segundo dia de pós-operatório por erro técnico e foram excluídos do experimento. Os setes receptores restantes apresentaram início de sinais clínicos de rejeição entre os dias 3-4 de pós-operatório e morreram ou foram sacrificados apresentando rejeição severa do enxerto entre os dias 7-9. Necropsia e histologia do enxerto confirmaram o diagnóstico de rejeição aguda grave. CONCLUSÃO: O transplante de intestino delgado com drenagem sistêmica em cão cursa com similar e letal evolução entre os dias de pós-operatórios 7-9 devido a forte rejeição do enxerto. Este modelo é excelente para o estudo pré-clínico das complicações do transplante de intestinal.


Subject(s)
Animals , Dogs , Female , Male , Graft Rejection/pathology , Intestine, Small/transplantation , Intestine, Small/blood supply , Intestine, Small/pathology
18.
Acta cir. bras ; 19(6): 670-676, nov.-dez. 2004. ilus, tab
Article in Portuguese | LILACS | ID: lil-392767

ABSTRACT

Objetivo: Avaliar a biocompatibilidade de um enxerto xenogênico de SID como meio de ampliação da capacidade vesical. Métodos: Oito cães mestiços foram submetidos à laparotomia e abertura da bexiga por incisão mediana de 3cm em sua face ventral. Para aumento da capacidade vesical, bem como sua reconstituição, foi interposto um segmento de submucosa porcina, fixando-o à parede vesical. No 30ºdia de pós-operatório os animais foram sacrificados e procedeu-se à análise macroscópica. As peças foram então encaminhadas para fixação, coloração e análise microscópica. Resultados: Não se observou seroma, hematoma, abscesso, fístula, deiscência, aderências, litíase e a não incorporação do enxerto. Microscopicamente observou-se em todos os casos uma proliferação do urotélio que recobriu toda a superfície do enxerto, além da presença de fibras musculares lisas no local do implante. Verificou-se proliferação conjuntiva, principalmente às custas de colágeno imaturo do tipo III e reação inflamatória crônica em todos os animais. A proliferação vascular foi acentuada e a reabsorção da membrana foram também observadas. Conclusão: Asubmucosa de intestino delgado porcino participou como um substrato para a regeneração da bexiga e pode ser uma futura alternativa na reconstrução do trato urinário.


Subject(s)
Animals , Dogs , Bioprosthesis , Urinary Bladder/surgery , Intestine, Small/transplantation , Intestinal Mucosa/transplantation , Surgical Flaps , Swine
19.
Arq. gastroenterol ; 41(3): 193-198, jul.-set. 2004. ilus, graf
Article in Portuguese | LILACS | ID: lil-392608

ABSTRACT

RACIONAL: O transplante de intestino delgado é procedimento cirúrgico em estudo visando sua aplicação no tratamento dos pacientes portadores da síndrome do intestino curto, com vistas à reabilitação oral. A grande barreira, porém, se deve à rejeição pela grande quantidade de tecido linfóide presente no intestino delgado. OBJETIVO: Estudo da apoptose em alotransplante heterotópico intestinal. MATERIAL E MÉTODOS: Realizaram-se 24 alotransplantes intestinais em ratos da raça Brown-Norway (doador) para Lewis (receptor), sendo subdivididos em três subgrupos de oito animais, sacrificados respectivamente no terceiro dia de pós-operatório (Tx(3)), no quinto dia de pós-operatório (Tx(5)) e no sétimo dia de pós-operatório (Tx(7)) para coleta das biopsias dos enxertos intestinais. Compararam-se os resultados com o grupo isotransplante (C) que envolveu oito animais da raça Lewis (doador) para Lewis (receptor), porém neste grupo realizaram-se biopsias seriadas no mesmo animal, sendo subdivididos em três momentos: biopsia no terceiro dia de pós-operatório (C(3)), no quinto dia de pós-operatório (C(5)) e sacrificados no sétimo dia de pós-operatório (C(7)) para coleta da biopsia. Realizou-se, inicialmente, análise intragrupo entre os momentos C(3), C(5) e C(7) para todos os parâmetros de rejeição citados anteriormente, como também para os três subgrupos Tx(3), Tx(5) e Tx(7). Posteriormente, realizou-se a análise intergrupo de forma transversal e pareada comparando-se o grupo isotransplante com o grupo alotransplante. (C(3) com Tx(3); C(5) com Tx(5) e C(7) com Tx(7)). No grupo isotransplante não houve expressão estatística quanto aos marcadores analisados. Porém, no grupo alotransplante observou-se que alterações da apoptose foram marcantes a partir do terceiro dia de pós-operatório.


Subject(s)
Animals , Male , Rats , Apoptosis , Graft Rejection/pathology , Intestine, Small/transplantation , Short Bowel Syndrome/surgery , Acute Disease , Intestine, Small/pathology , Rats, Inbred BN , Rats, Inbred Lew , Time Factors , Transplantation, Homologous
20.
Rev. Hosp. Clin. Fac. Med. Univ. Säo Paulo ; 59(3): 131-134, June 2004. ilus
Article in English | LILACS | ID: lil-363372

ABSTRACT

A enterite necrosante é uma doença típica do período neo-natal que pode acometer o intestino delgado, colo e/ou estômago. Até o presente, a necrose maciça do intestino delgado com o acometimento concomitante do esôfago nunca foi relatada. É apresentado o caso de um lactente com 6 meses de idade com enterite necrosante e acometimento de todo intestino delgado, ceco e terço inferior do esôfago. Após setenta dias de tratamento, o trânsito intestinal foi re-estabelecido por anastomose entre o primeiro centímetro do jejuno e o colo ascendente. Finalmente, o trânsito esofagiano foi refeito pela transposição gástrica total e anastomose esôfago-gástrica cervical. O paciente foi mantido em nutrição parenteral durante 19 meses e ao fim deste período desenvolveu falência hepática aguda, tendo sido submetido a transplante duplo de fígado e intestino delgado. Dois meses após, faleceu em decorrência de complicações neurológicas, provavelmente relacionadas à infecção ou ao tratamento imunossupressor.


Subject(s)
Humans , Infant , Male , Enterocolitis, Necrotizing/pathology , Esophagus/pathology , Intestine, Small/pathology , Anastomosis, Surgical , Enterocolitis, Necrotizing/complications , Enterocolitis, Necrotizing/surgery , Fatal Outcome , Intestine, Small/transplantation , Liver Transplantation , Liver Failure, Acute/etiology , Liver Failure, Acute/surgery , Necrosis
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