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1.
Amino Acids ; 52(8): 1125-1137, 2020 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-32757125

RESUMO

Interest in adipose tissue pathophysiology and biochemistry have expanded considerably in the past two decades due to the ever increasing and alarming rates of global obesity and its critical outcome defined as metabolic syndrome (MS). This obesity-linked systemic dysfunction generates high risk factors of developing perilous diseases like type 2 diabetes, cardiovascular disease or cancer. Amino acids could play a crucial role in the pathophysiology of the MS onset. Focus of this study was to fully characterize amino acids metabolome modulations in visceral adipose tissues (VAT) from three adult cohorts: (i) obese patients (BMI 43-48) with metabolic syndrome (PO), (ii) obese subjects metabolically well (O), and (iii) non obese individuals (H). 128 metabolites identified as 20 protein amino acids, 85 related compounds and 13 dipeptides were measured by ultrahigh performance liquid chromatography-tandem mass spectroscopy (UPLC-MS/MS) and gas chromatography-/mass spectrometry GC/MS, in visceral fat samples from a total of 53 patients. Our analysis indicates a probable enhanced BCAA (leucine, isoleucine, valine) degradation in both VAT from O and PO subjects, while levels of their oxidation products are increased. Also PO and O VAT samples were characterized by: elevated levels of kynurenine, a catabolic product of tryptophan and precursor of diabetogenic substances, a significant increase of cysteine sulfinic acid levels, a decrease of 1-methylhistidine, and an up regulating trend of 3-methylhistidine levels. We hope this profiling can aid in novel clinical strategies development against the progression from obesity to metabolic syndrome.


Assuntos
Aminoácidos/metabolismo , Gordura Intra-Abdominal/metabolismo , Metabolômica/métodos , Obesidade/metabolismo , Tecido Adiposo/metabolismo , Adulto , Idoso , Aminoácidos de Cadeia Ramificada/metabolismo , Cromatografia Líquida/métodos , Cisteína/metabolismo , Feminino , Cromatografia Gasosa-Espectrometria de Massas/métodos , Histidina/metabolismo , Humanos , Masculino , Metaboloma , Metionina/metabolismo , Pessoa de Meia-Idade , Espectrometria de Massas em Tandem/métodos , Taurina/metabolismo , Triptofano/metabolismo , Adulto Jovem
2.
Obes Surg ; 16(2): 125-31, 2006 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-16469211

RESUMO

BACKGROUND: Gastro-jejunal anastomotic leak and internal hernia can be life-threatening complications of laparoscopic Roux-en-Y gastric bypass (LRYGBP), ranging from 0.1-4.3% and from 0.8-4.5% respectively. The safety and efficacy of a fibrin glue (Tissucol) was assessed when placed around the anastomoses and over the mesenteric openings for prevention of anastomotic leaks and internal hernias after LRYGBP. METHODS: A prospective, randomized, multicenter, clinical trial commenced in January 2004. Patients with BMI 40-59 kg/m2, aged 21-60 years, undergoing LRYGBP, were randomized into: 1) study group (fibrin glue applied on the gastro-jejunal and jejuno-jejunal anastomoses and the mesenteric openings); 2) control group (no fibrin glue, but suture of the mesenteric openings). 322 patients, 161 for each arm, will be enrolled for an estimated period of 24 months. Sex, age, operative time, time to postoperative oral diet and hospital stay, early and late complications rates are evaluated. An interim evaluation was conducted after 15 months. RESULTS: To April 2005, 204 patients were randomized: 111 in the control group (mean age 39.0+/-11.6 years, BMI 46.4 +/- 8.2) and 93 in the fibrin glue group (mean age 42.9+/-11.7 years, BMI 46.9+/-6.4). There was no mortality or conversion in both groups; no differences in operative time and postoperative hospital stay were recorded. Time to postoperative oral diet was shorter for the fibrin glue group (P = 0.0044). Neither leaks nor internal hernias have occurred in the fibrin glue group. The incidence of leaks (2 cases, 1.8%) and the overall reoperation rate were higher in the control group (P=0.0165). CONCLUSION: The preliminary results suggest that Tissucol application has no adverse effects, is not time-consuming, and may be effective in preventing leaks and internal hernias in morbidly obese patients undergoing LRYGBP.


Assuntos
Anastomose Cirúrgica/efeitos adversos , Adesivo Tecidual de Fibrina/uso terapêutico , Derivação Gástrica/efeitos adversos , Hérnia Abdominal/prevenção & controle , Laparoscopia/efeitos adversos , Adulto , Anastomose Cirúrgica/métodos , Estudos de Avaliação como Assunto , Feminino , Seguimentos , Derivação Gástrica/métodos , Hérnia Abdominal/etiologia , Humanos , Laparoscopia/métodos , Masculino , Pessoa de Meia-Idade , Obesidade Mórbida/diagnóstico , Obesidade Mórbida/cirurgia , Complicações Pós-Operatórias/prevenção & controle , Probabilidade , Estudos Prospectivos , Valores de Referência , Medição de Risco , Sensibilidade e Especificidade , Adesivos Teciduais/uso terapêutico , Resultado do Tratamento
3.
Transplant Proc ; 37(10): 4563-6, 2005 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16387171

RESUMO

The success of recovery after liver resection depends on the regeneration and functions of the remnant liver. In this study we investigated whether liver regeneration was facilitated by nandrolone decaonate after two-thirds partial hepatectomy in rats. Study animals were pretreated with nandrolone (5 mg/kg), while control animals received a placebo. Animal were sacrificed at 12, 24, 48, and 72 hours. We compared the survival rates, liver function tests as well as the amount of apoptosis by terminal deoxynucleotidyl transferase-mediated deoxyuridine-biotin nick end labeling assay, and regeneration, which was expressed as ratio of proliferating cell nuclear antigen and restoration ratio. A significant increase in hepatocyte regeneration at 24 and 48 hours in partially hepatectomized rats treated with nandrolone decaonate was observed compared to controls. This observation was confirmed by the significant acceleration of the liver restoration rate, which was 1/5 faster than in partially hepatectomized controls. The results of this study indicate that liver regeneration in rats treated with nandrolone show a prompt, faster regeneration after partial hepatectomy.


Assuntos
Anabolizantes/farmacologia , Regeneração Hepática/fisiologia , Fígado/citologia , Nandrolona/farmacologia , Animais , Hepatócitos/citologia , Hepatócitos/efeitos dos fármacos , Fígado/efeitos dos fármacos , Fígado/patologia , Regeneração Hepática/efeitos dos fármacos , Masculino , Ratos , Ratos Endogâmicos Lew , Vacúolos/efeitos dos fármacos , Vacúolos/ultraestrutura
4.
Nutr Diabetes ; 5: e175, 2015 Aug 10.
Artigo em Inglês | MEDLINE | ID: mdl-26258766

RESUMO

BACKGROUND/OBJECTIVES: The unresolved chronic inflammation of white adipose tissue (WAT) in obesity leads to interstitial deposition of fibrogenic proteins as reparative process. The contribution of omental adipose tissue (oWAT) fibrosis to obesity-related complications remains controversial. The aim of our study was to investigate whether oWAT fibrosis may be related to insulin resistance in severely obese population. SUBJECTS/METHODS: Forty obese subjects were studied by glucose clamp before undergoing bariatric surgery and thus stratified according to insulin resistance severity (M-value). From the first (Group B: n=13; M=1.9±0.7 mg kg(-1) min(-1)) and the highest (Group A: n=14; M=4.5±1.4 mg kg(-1) min(-1)) M-value tertiles, which were age-, waist- and body mass index-matched, oWAT samples were then obtained.Gene expression of collagen type I, III and VI, interleukin-6, profibrotic mediators (transforming growth factor (TGF)-ß1, activin A, connective tissue growth factor), hypoxia inducible factor-1α (HIF-1α) and macrophage (CD68, monocyte chemotactic protein (MCP)-1, CD86, CD206, CD150) markers were analyzed by quantitative reverse transcription PCR. Adipocyte size and total fibrosis were assessed by histomorphometry techniques. RESULTS: Fibrosis at morphological level resulted significantly greater in Group B compared with Group A, although collagens gene expression did not differ. Notably, collagen VI messenger RNA significantly correlated with collagen I, collagen III, HIF-1α, TGF-ß1, CD68, MCP-1 and CD86 transcription levels, supporting their relation with fibrosis development. CONCLUSIONS: In conclusion, we show for the first time that human oWAT fibrosis in severe obesity is consistent with a higher degree of insulin resistance measured by glucose clamp. Therefore, collagen deposition could represent a maladaptive mechanism contributing to obesity-related metabolic complications.

5.
Obes Surg ; 11(4): 469-73, 2001 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-11501357

RESUMO

BACKGROUND: A Silastic ring has been used to prevent dilation of the gastrojejunostomy in Roux-en-Y gastric bypass (RYGBP). The use of a bio-membrane may prevent dilation of the anastomosis without the risks associated with prostheses. The aim of this study was to evaluate the feasibility and safety of applying such a bio-membrane around the gastrojejunostomy in Laparoscopic RYGBP (LRYGBP). METHODS: We used a new bio-membrane, that is derived from porcine small intestinal submucosa (SIS) and acts as a scaffolding for the ingrowth of connective tissue. Over a 4-month period, 14 LRYGBP patients had their proximal anastomosis wrapped with 10 x 2.5 cm SIS by a single surgeon. We compared these patients to a control group of LRYGBP patients matched for BMI. RESULTS: The average age of the patients was 35.0 years (control group: 45.1 years). The patients had a mean initial BMI of 44.7 kg/m2 (+/- 5.9) standard error, and the control subjects had a mean initial BMI of 46.7 kg/m2 (+/- 6.5). SIS application took a mean time of 11 (+/- 3) minutes without any intraoperative complication. The median hospital stay was 3.5 days in the experimental group and 3.7 days in controls. Three patients developed a symptomatic stenosis at the gastrojejunostomy following surgery. In the control group there were two stenoses. At an average follow-up of 87 days (controls: 95 days), the mean reduction in BMI was 7.8 (+/- 0.8) kg/m2 [controls 8.6 kg/m2 (+/- 1.5)]. CONCLUSION: Application of SIS around the gastrojejunostomy in patients undergoing LRYGBP is feasible and safe. Further follow-up is required, however, to evaluate the effectiveness in preventing dilation of the anastomosis.


Assuntos
Anastomose em-Y de Roux/métodos , Curativos Biológicos/normas , Derivação Gástrica/métodos , Gastroscopia/métodos , Gastrostomia/métodos , Mucosa Intestinal/transplante , Jejunostomia/métodos , Adulto , Anastomose em-Y de Roux/efeitos adversos , Animais , Biodegradação Ambiental , Curativos Biológicos/efeitos adversos , Índice de Massa Corporal , Constrição Patológica/etiologia , Estudos de Viabilidade , Feminino , Seguimentos , Derivação Gástrica/efeitos adversos , Gastroscopia/efeitos adversos , Gastrostomia/efeitos adversos , Humanos , Jejunostomia/efeitos adversos , Tempo de Internação/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Estômago/patologia , Suínos , Resultado do Tratamento , Redução de Peso , Cicatrização
6.
Surg Endosc ; 15(6): 566-9, 2001 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-11591941

RESUMO

BACKGROUND: Lap Group Roma was established in 1999 to promote and control the development of laparoscopic surgery in the area of Rome and its province. Complications during the creation of pneumoperitoneum were given a high priority of investigation, and a retrospective enquiry was immediately carried out. METHODS: A questionnaire about all laparoscopic surgical practice performed from January 1994 to December 1998 was sent to the supervisors of 28 centers of general surgery in the area of Rome and its province participating to the Lap Group Roma, requesting demographics, type of procedure for the creation of pneumoperitoneum, type and timing of operation, and major vascular, visceral, and minor vascular injuries related to the creation of pneumoperitoneum. RESULTS: The questionnaire was returned by 57% of the centers, for a total of 12,919 laparoscopic procedures. The type of procedure used to create the pneumoperitoneum involved a standard closed approach (Veress needle + first trocar) in 82% of the cases, an open (Hasson) approach in 9% of the cases, and the use of an optical trocar in 9% of the cases. There were seven major vascular injuries (0.05%), eight visceral lesions (0.06%), and nine minor vascular lesions (0.07%), for an overall morbility of 0.18%. There was no death related to these complications. The rate of complications differed significantly (p < 0.0001) depending on the type of approach used. It was 0.27% with the optical trocar (3 of 1,009 cases), 0.18% with the closed approach (20 of 10,664 cases), and 0.09% with the open approach (1 of 1,135 cases). CONCLUSIONS: There is no foolproof technique for the creation of pneumoperitoneum, and this inquiry confirms the need of a constant search for prevention and early treatment of complications encountered during this obligatory phase of any laparoscopic approach. A well-conducted and prolonged prospective audit of clinical practice could help in identifying the risk factors that can make an alternative approach (open or video controlled) preferable to the widely used closed approach.


Assuntos
Vasos Sanguíneos/lesões , Sistema Digestório/lesões , Laparoscopia/métodos , Pneumoperitônio Artificial/efeitos adversos , Ferimentos Penetrantes/etiologia , Cirurgia Geral/estatística & dados numéricos , Humanos , Incidência , Itália , Laparoscopia/estatística & dados numéricos , Pneumoperitônio Artificial/métodos , Pneumoperitônio Artificial/estatística & dados numéricos , Vigilância da População , Medição de Risco , Instrumentos Cirúrgicos/efeitos adversos , Inquéritos e Questionários , Ferimentos Penetrantes/epidemiologia
7.
Surg Endosc ; 16(5): 736-44, 2002 May.
Artigo em Inglês | MEDLINE | ID: mdl-11997813

RESUMO

BACKGROUND: The aim of this study was to perform an evidence-based analysis of the literature on open and laparoscopic surgery for morbid obesity. METHODS: Human studies on surgery for morbid obesity were conducted. Multiple publications of the same studies, abstracts, and case reports were reviewed. Current Contents, MEDLINE, EMBASE, and Cochrane Library databases were investigated. RESULTS: Open Roux-en-Y gastric by pass (RYGB) for morbidly obese patients and long-limb RYGB for superobese patients are highly effective procedures. Randomized controlled trials comparing malabsorptive procedures with other bariatric operations are needed. The long-term efficacy of adjustable silicone gastric banding (ASGB) still is undetermined because of poor evidence. Laparoscopic RYGB is as safe as its open counterpart, although its long-term results are lacking. Laparoscopic ASGB is less invasive than open ASGB, although its efficacy cannot be determined because of poor evidence. Laparoscopic vertical banded gastroplasty (VBG) is becoming unpopular since the decreasing trend of open VBG. Laparoscopic biliopancreatic diversion with duodenal switch is feasible, but needs further studies. CONCLUSIONS: Randomized controlled trials comparing the various laparoscopic operations are strongly needed.


Assuntos
Medicina Baseada em Evidências/métodos , Laparoscopia/métodos , Obesidade Mórbida/cirurgia , Anastomose em-Y de Roux/métodos , Estudos de Casos e Controles , Estudos de Coortes , Contraindicações , Endoscopia Gastrointestinal/métodos , Derivação Gástrica/métodos , Gastroplastia/métodos , Humanos , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto , Silicones/uso terapêutico , Resultado do Tratamento
8.
Surg Endosc ; 18(4): 638-41, 2004 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-14752639

RESUMO

BACKGROUND: The need to administer antibiotic prophylaxis (ABP) during laparoscopic cholecystectomy (LC) is still a matter of significant controversy. The purpose of this study was to resolve this issue by performing a meta-analysis of the available randomized controlled trials (RCT) on this topic. METHODS: Papers identified via a systematic literature search were evaluated according to standard criteria. Data regarding the patient sample, study methods, and outcomes were abstracted and summarized across studies. The outcome measures were the rates of all perioperative infections, the rates of surgical site infections, and the rates of infections at other sites. Results were examined for 974 patients randomized to ABP or placebo prior to LC in six RCT published from 1997 to 2001. RESULTS: The cumulative rates of all infections were 2.8% in the ABP group and 4.4% in the placebo group. The pooled odds ratio (OR) (95% confidence interval [CI]) was 0.69 (0.34-1.43; p = 0.32). The cumulative rates of surgical site infections were 2.1% in the ABP group and 2.9% in the placebo group. The pooled OR (95% CI) was 0.82 (0.36-1.86; p = 0.63). The cumulative rates of infections at other sites were 0.7% in the ABP group and 1.5% in the placebo group. Pooled OR (95% CI) was 0.82 (0.18-1.90; p = 0.37). No significant heterogeneity was found in any data pooling. CONCLUSIONS: Based on the available evidence, there appears to be no need to administer routine ABP to low-risk patients during LC. However, the number of patients enrolled to date into RCT is insufficient to avoid a type II error. A large and well-designed trial is urgently needed to find a conclusive answer to this question.


Assuntos
Antibioticoprofilaxia , Colecistectomia Laparoscópica/estatística & dados numéricos , Antibioticoprofilaxia/estatística & dados numéricos , Colecistectomia/estatística & dados numéricos , Intervalos de Confiança , Bases de Dados Bibliográficas , Medicina Baseada em Evidências , Humanos , Incidência , Razão de Chances , Estudos Prospectivos , Ensaios Clínicos Controlados Aleatórios como Assunto/métodos , Ensaios Clínicos Controlados Aleatórios como Assunto/estatística & dados numéricos , Infecção da Ferida Cirúrgica/epidemiologia , Infecção da Ferida Cirúrgica/prevenção & controle , Resultado do Tratamento
9.
Surg Endosc ; 16(12): 1786-9, 2002 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-12239647

RESUMO

BACKGROUND: Small bowel transplantation represents a valid therapeutic option for patients with intestinal failure, obviating the need for long-term total parenteral nutrition. Recently, reports have shown the feasibility of performing living related intestinal transplantation using segmental small bowel grafts. The limitations of this technique include inadequate harvested small bowel lengths, as compared with the lengths obtained in cadaveric small bowel harvests, and large incisions for the donor. In this pilot study, we evaluated the feasibility of laparoscopically harvesting long segments of proximal jejunum for small bowel transplantation using a porcine model. The results can be used to evaluate the potential for applying this technique in human cases. METHODS: For this study 10 yorkshire pigs were used. Under general anesthesia, each pig underwent laparoscopic segmental resection of 200 cm of proximal jejunum on a vascular pedicle. The harvested graft then was autoreimplanted using an open technique by anastomosing the vascular pedicle to the superior mesenteric vessels. Success was determined 2 hours after anastomosis by visually identifying a pink graft with viable-appearing mucosa, an artery with a strong thrill, and palpable venous flow. The animals were then sacrificed. RESULTS: The mean operation time required to laparoscopically harvest the small bowel graft was 80 min (range, 35-120 min), and the mean length of harvested graft was 220 cm (range, 200-260 cm). The mean length of the graft's vascular pedicle was 4.5 cm (range, 4-5 cm). All 10 grafts were successfully harvested laparoscopically and then reimplanted using an open technique. All the grafts maintained good vascular flow, and showed no evidence of mucosal necrosis at necropsy. Obviously, further studies would be required to examine the long-term results of reimplanting a laparoscopically harvested small bowel graft, but proposals for such studies is beyond the scope of this report. CONCLUSION: Minimally invasive techniques can be used to harvest proximal small bowel grafts for living related small bowel transplantation.


Assuntos
Intestino Delgado/transplante , Laparoscopia/métodos , Coleta de Tecidos e Órgãos/métodos , Animais , Jejuno/cirurgia , Jejuno/transplante , Doadores Vivos , Projetos Piloto , Suínos , Transplante Autólogo
10.
Surg Endosc ; 18(2): 232-6, 2004 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-14691705

RESUMO

BACKGROUND: Bile duct injuries (BDIs) during laparoscopic cholecystectomy (LC) still are reported with greater frequency than during open cholecystectomy (OC). METHODS: In 1999, a retrospective study evaluating the incidence of BDIs during LC in the area of Rome from 1994 to 1998 (group A) was performed. In addition, a prospective audit was started, ending in December 2001 (group B). RESULTS: In group A, 6,419 LCs were performed (222 were converted to OC; 3.4%). In group B, 7,299 LCs were performed (225 were converted to OC; 3.1%). Seventeen BDIs (0.26%) occurred in group A and 16 (0.22%) in group B. Overall, mortality and major morbidity rates were 12.1% and 30.3%, respectively, without significant differences between the two groups. CONCLUSIONS: The incidence and clinical relevance of BDIs during LC in the area of Rome appeared to be stable over the past 8 years and were not influenced by the use of a prospective audit, as compared with a retrospective survey.


Assuntos
Ductos Biliares/lesões , Colecistectomia Laparoscópica/estatística & dados numéricos , Complicações Intraoperatórias/epidemiologia , Idoso , Ductos Biliares/cirurgia , Colecistectomia/estatística & dados numéricos , Colelitíase/cirurgia , Feminino , Seguimentos , Humanos , Incidência , Complicações Intraoperatórias/mortalidade , Complicações Intraoperatórias/cirurgia , Jejuno/cirurgia , Fígado/cirurgia , Masculino , Auditoria Médica , Pessoa de Meia-Idade , Estudos Prospectivos , Estudos Retrospectivos , Cidade de Roma/epidemiologia , Inquéritos e Questionários
11.
Transplant Proc ; 36(2): 283-5, 2004 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-15050134

RESUMO

Ischemic preconditioning (IP), obtained by exposure to brief periods of vascular occlusion, improves organ tolerance to prolonged ischemia. The aim of this study was to evaluate the effects of IP on intestinal morphology. Forty rats were subjected to sham surgery (n = 20, group I) or intestinal preconditioning (n = 20, group II) with a cycle of brief ischemia/reperfusion (10-minute occlusion of superior mesenteric artery [SMA], followed by 10-minute reperfusion) before prolonged ischemia produced by SMA occlusion (45 minutes). Five animals in each group were sacrificed 2, 12, 24, and 48 hours after reperfusion. Intestinal samples were processed for light and electron microscopy. A TUNEL assay was performed to detect apoptosis. Statistical analysis used Student t test and Kaplan-Meier survival curves. The overall mortality for the sham-operated group was 15%, while no animals of group II died (NS). Histological evaluation showed early detachment of epithelial cells from villous stroma accompanied by marked congestion and edema. Successive morphological changes were represented by leukocyte infiltration, focal necrosis, and marked villus denudation or loss. Group II animals showed significantly reduced inflammatory infiltrates in the lamina propria and a greater villus height compared to group I. The maximum number of apoptotic nuclei was observed in both groups, Following 2 hours of reperfusion group II animals showed significantly, greater apoptosis at 2 and 12 hours after reperfusion (P <.05). Electron microscopy showed severe mitochondrial and basement membrane damage. The findings from this study confirm that IP preconditioning attenuates morphological alterations that are invariably present after prolonged ischemia and reperfusion.


Assuntos
Íleo/irrigação sanguínea , Precondicionamento Isquêmico/métodos , Traumatismo por Reperfusão/prevenção & controle , Animais , Membrana Basal/patologia , Membrana Basal/ultraestrutura , Íleo/patologia , Íleo/ultraestrutura , Masculino , Mitocôndrias/patologia , Mitocôndrias/ultraestrutura , Ratos , Ratos Endogâmicos ACI
12.
Transplant Proc ; 36(10): 2944-6, 2004 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-15686666

RESUMO

Melatonin, the primary pineal hormone, has been reported to protect from oxidative injury after ischemia-reperfusion (IR). The aim of this study was to evaluate the effects of exogenous melatonin on intestinal integrity, ileal colonization, and bacterial translocation 45-minute after mesenteric IR. Sixteen male ACI rats randomly divided into two groups underwent 45-minutes intestinal ischemia by clamping the superior mesenteric artery. One hour prior to ischemia, study animals (n=8, group A) were treated with melatonin (10 mg/kg IP) while control animals (n=8, group B) received the same volume of saline solution. An additional six animals underwent laparotomy and served as a sham-operated group. Animals were sacrificed 24 hours after reperfusion; peritoneal swabs and biopsies of liver, spleen, lung, mesenteric lymph nodes, cecum, and terminal ileum were obtained for microbiology. The ileum samples were also processed for histopathological evaluation of IR-induced injury. Twenty-four hours after reperfusion bacterial translocation to the peritoneal cavity present in all group B animals was reduced to 37.5% among those that were melatonin-treated (group A; P <.05). Furthermore bacterial translocation to mesenteric lymph nodes, spleen, and liver was significantly lower in group A than group B (P <.05). Although cecal and ileal counts did not differ between the two groups, ileal counts from control animals showed increased colonization. Accordingly, a single injection of exogenous melatonin significantly reduced the intestinal IR injury and prevented bacterial translocation.


Assuntos
Translocação Bacteriana/efeitos dos fármacos , Intestinos/irrigação sanguínea , Melatonina/farmacologia , Traumatismo por Reperfusão/prevenção & controle , Animais , Modelos Animais de Doenças , Fígado/microbiologia , Pulmão/microbiologia , Linfonodos/microbiologia , Masculino , Peritônio/microbiologia , Ratos , Ratos Endogâmicos ACI , Baço/microbiologia
13.
J Laparoendosc Adv Surg Tech A ; 11(4): 223-8, 2001 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-11569512

RESUMO

PURPOSE: To verify the technical feasibility of laparoscopic aortorenal bypass in a porcine model and to evaluate renal pathologic findings after a short survival time. MATERIALS AND METHODS: Laparoscopic aorta-to-left-renal artery bypass using an interposition Gore-Tex graft was performed in five animals. Renal function was assessed 1 week postoperatively and euthanasia performed after 14 days for histologic examination. RESULTS: The median surgical time was 210 minutes (range 160-260 minutes). The median time needed to perform the aorta-to-graft anastomosis was 65 minutes (range 50-75 minutes), and the median time required to create the graft-to-renal artery anastomosis was 50 minutes (range 45-60 minutes). No conversion to open surgery was needed. Two intraoperative complications were observed: one large-bowel perforation, which was managed laparoscopically, and one obstruction of the aorta-to-graft anastomosis caused by clots, which was managed by removal of clots with a balloon catheter. No major postoperative complications were observed. The mean preoperative and postoperative serum creatinine concentrations were 0.8 +/- 1.2 and 0.7 +/- 1.6 mg/dL, respectively. At autopsy, all but one of the pigs were found to have a patent aortorenal bypass. In one pig, we found a partially clotted graft. Histologic examination demonstrated an unremarkable kidney in four cases and a kidney showing aspects of coagulative necrosis with viable cells in the animal with the partially clotted graft. CONCLUSIONS: Laparoscopic aortorenal bypass is feasible. The short-term effect of the bypass on kidney vascularization seems promising, as demonstrated by pathologic findings. Laparoscopic aortorenal bypass could extend the indications for renal revascularization surgery.


Assuntos
Aorta Abdominal/cirurgia , Laparoscopia/métodos , Artéria Renal/cirurgia , Anastomose Cirúrgica/efeitos adversos , Anastomose Cirúrgica/métodos , Animais , Estudos de Viabilidade , Período Intraoperatório , Rim/patologia , Rim/fisiologia , Politetrafluoretileno , Suínos , Fatores de Tempo
15.
Minerva Chir ; 52(7-8): 891-900, 1997.
Artigo em Italiano | MEDLINE | ID: mdl-9411290

RESUMO

We have analysed the results of surgical treatment for microcarcinoma of the thyroid (MCT). In sixteen patient clinical and follow-up data were retrospectively evaluated during a 35.1-month follow-up. Thyroid hyperfunctional state us was present in two subjects. A single nodule was detected by echotomography in 11 patients, while multinodular diffuse goitre was revealed in 3 patients. In the last two subjects, thyroid gland appeared completely normal at ultrasonography, despite laterocervical lymph node metastases. Fine-needle aspiration biopsy was performed in 6 patients and its diagnostic accuracy was high (83,3%). MCT was classified as "incidental" in 12 patients and "occult" in the remaining 4 patients. Eight subjects underwent total thyroidectomy and 8 hemithyroidectomy plus isthmectomy. No postoperative complications were recorded. In 10 patients MCT histotype was papillar adenocarcinoma, in 5 was follicular adenocarcinoma and in the remaining case it was medullary carcinoma. Goitre was associated in 75% of the cases. Only in a patient disease progressed to death because of hematogenous metastases. In conclusion, we believe that incidental MCT is a low-grade malignancy with a benign biological behaviour. Occult MCT is a potentially lethal disease. We did not observe differences in the long-term results between different surgical treatments of MCT.


Assuntos
Adenocarcinoma Folicular/cirurgia , Adenocarcinoma Papilar/cirurgia , Carcinoma Medular/cirurgia , Neoplasias da Glândula Tireoide/cirurgia , Adenocarcinoma Folicular/diagnóstico , Adenocarcinoma Folicular/patologia , Adenocarcinoma Papilar/diagnóstico , Adenocarcinoma Papilar/patologia , Adulto , Idoso , Biópsia por Agulha , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/secundário , Carcinoma Medular/diagnóstico , Carcinoma Medular/patologia , Diagnóstico Diferencial , Feminino , Seguimentos , Bócio Nodular/diagnóstico , Humanos , Metástase Linfática , Masculino , Pessoa de Meia-Idade , Cintilografia , Estudos Retrospectivos , Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/patologia , Fatores de Tempo
16.
Chir Ital ; 53(3): 279-89, 2001.
Artigo em Inglês | MEDLINE | ID: mdl-11452812

RESUMO

The extent of reported laparoscopic resections vary from enucleation to pancreaticoduodenectomy. Although initial series have been reported with encouraging results, most patients with pancreatic disease requiring resection are still treated with an open approach. We present a review of our experience and of the world literature on laparoscopic pancreatic resection. Laparoscopic pancreaticoduodenectomy has been attempted in 12 patients with a conversion rate of 33%. Complications occurred in the laparoscopic group. The laparoscopic patients have experienced no benefit in the postoperative recovery and convalescence. Early experience with the hand-assisted approach is promising. Sixty-eight laparoscopic distal pancreatectomies and enucleations have been reported to date. They were 42 distal pancreatectomies and 26 enucleations. Thirteen procedures have been converted to open surgery (19.1%). There was no mortality and the main postoperative complication was pancreatic leak (5 patients, 7.3%). Average hospital stay was 9 days. These results compare favorably with the outcomes after open pancreatic resection. While laparoscopic pancreaticoduodenectomy is not associated with patient benefit and may be accompanied by increased morbidity, laparoscopic distal pancreatectomy and enucleation are safe, carry low morbidity and have encouraging results in terms of postoperative recovery.


Assuntos
Laparoscopia , Pancreatectomia/métodos , Humanos
17.
Ann Ital Chir ; 71(3): 367-72, 2000.
Artigo em Italiano | MEDLINE | ID: mdl-11014017

RESUMO

Although the use of drains is common in clinical practice, its real role in the prophylaxis and therapy of postoperative complications is still not clear. In the literature we can find both supporters of drains, and many opponents who consider their use unnecessary and sometimes even dangerous. In fact, during new experimental and clinical studies, it was impossible to determine the usefulness of prophylactic abdominal drain, at least in the case of colo-rectal anastomosis, it has been demonstrated that use of drains limits the risks of an anastomotic leakage but, in some cases, the same drains could be the cause of some of the complications that should be avoided. Although there is a considerable theoretical and practical evidences in favour of drainage, the dispute about "to drain or not to drain" the peritoneal cavity after elective colo-rectal surgery remains open. This retrospective study made on 150 patients operated on elective surgery for rectal cancer demonstrates that prophylactic drain does not significantly influence the general rate of leakage (3.15% for group A and 5.45% for group B, p > 0.1); in two of the three fistulas in patients with drains, the drains have permitted the diagnosis, but have not permitted the reduction of the number of operations for fistulas.


Assuntos
Drenagem , Neoplasias Retais/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos
18.
G Chir ; 14(2): 117-9, 1993 Feb.
Artigo em Italiano | MEDLINE | ID: mdl-8489893

RESUMO

Sarcoidosis of the breast is rare and only few cases are reported in the literature. A case of sarcoidosis presenting as a breast mass with no other evidence of disease is herein reported. Ultrasound and fine needle aspiration biopsy were performed, but only excisional biopsy with microscopic examination confirmed the diagnosis. Differential diagnosis with other granulomatous lesions is important to select the proper treatment.


Assuntos
Doenças Mamárias/diagnóstico , Sarcoidose/diagnóstico , Biópsia por Agulha , Mama/patologia , Mama/cirurgia , Doenças Mamárias/patologia , Doenças Mamárias/cirurgia , Diagnóstico Diferencial , Feminino , Humanos , Pessoa de Meia-Idade , Sarcoidose/patologia , Sarcoidose/cirurgia
20.
G Chir ; 14(3): 159-63, 1993 Mar.
Artigo em Italiano | MEDLINE | ID: mdl-8518080

RESUMO

Two cases of severe alkaline esophagitis following total gastrectomy, respectively for a gastric sarcoma and a gastric carcinoma, are reported. In the first case digestive continuity was assured through an Omega loop esophagojejunostomy, while in the second one an esophagojejunostomy according to the Moricca technique was performed. Both patients underwent reoperation and a conversion in Roux-en-Y esophagojejunostomy resolved the reflux related problems. The Authors, therefore, confirm Roux-en-Y esophagojejunostomy as the procedure of choice in preventing and curing esophagitis, which can seriously affect the quality of life and nutritional status of gastrectomized patients.


Assuntos
Esofagite Péptica/etiologia , Síndromes Pós-Gastrectomia/etiologia , Adulto , Idoso , Anastomose em-Y de Roux/métodos , Esofagite Péptica/diagnóstico , Esofagite Péptica/cirurgia , Esôfago/cirurgia , Feminino , Humanos , Jejunostomia/métodos , Síndromes Pós-Gastrectomia/diagnóstico , Síndromes Pós-Gastrectomia/cirurgia , Reoperação/métodos
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