Alcino Lázaro da Silva's research while affiliated with Federal University of Minas Gerais and other places

Publications (148)

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The dengue fever is a major public health problem in the world. In Brazil, in 2015, there were 1,534,932 cases, being 20,320 cases of severe form, and 811 deaths related to this disease. The distribution of Aedes aegypti, the vector, is extensive. Recently, Zika and Chikungunya viruses had arisen, sharing the same vector as dengue and became a huge...
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Background: The jejunal pouch interposition between the gastric body and the duodenum after the gastrectomy, although not frequent in the surgical practice today, has been successfully employed for the prevention and treatment of the postgastrectomy syndromes. In the latter, it is included the dumping syndrome, which affects 13-58% of the patients...
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To evaluate the effects of isoxsuprine and nicotine on TRAM. Forty eight 48 Wistar rats distributed into four Groups (n=12). All rats received medication managed daily for 20 days: saline solution (SA), nicotine solution (NI), isoxsuprine solution (IS) and nicotine solution (NI) + isoxsuprine solution (IS). On day 21st the rats were submitted to th...
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To avoid recurrences there has always been research in new inguinal hernia surgical techniques. Aim: Show the technique using the hernial sac in reinforcement of the wall in inguinal hernia surgery. Methods: 251 patients were submitted to inguinal hernia surgery using the hernial sac from January 2006 to December 2013. Ten patients had bilateral he...
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The most common injury to indicate definitive stoma is rectal cancer. Despite advances in surgical treatment, the abdominoperineal resection is still the most effective operation in radical treatment of malignancies of the distal rectum invading the sphincter and anal canal. Even with all the effort that surgeons have to preserve anal sphincters, a...
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O artigo em questão aborda os motivos pelos quais a Medicina Defensiva é largamente utilizada no Brasil e no Mundo. A Medicina Defensiva, na prática, se caracteriza pela utilização exagerada de exames complementares, pelo uso de procedimentos terapêuticos supostamente mais seguros, pelo encaminhamento frequente de pacientes a outros especialistas e...
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For a few decades the long-term use of proton pump inhibitors has had wide application in the treatment of several gastrointestinal diseases. Since then, however, several studies have called attention to the possible development of anatomical and pathological changes of gastric mucosa, resulting from the long term use of this therapeutic modality....
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BACKGROUND:The intestinal interpositions are important in various operations of the digestive tract. However, they are capable to produce serious immediate and late complications. To compare clinical and surgical outcomes, as well as intestinal pathological findings, in dogs submitted to jejunum and colon interposition. Forty male mongreal dogs wer...
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We discuss the reasons why Defensive Medicine is widely used in Brazil and worldwide. The Defensive Medicine is characterized by excessive use of complementary tests, the use of supposedly safer therapeutic procedures, the frequent referral of patients to other specialists and by the refusal to care for critically ill patients and with greater pote...
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To investigate immunohistochemical aspects of the myenteric plexus of valves constructed in the colon of rats to verify whether any denervation occurs both at the operative site and in those areas adjacent to the third valve. Thirty six male Wistar rats divided into the following three groups were used: Control Group (CG); Amputated Group (AG); Amp...
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To compare the wound healing of the abdominal wall of rabbits exposed to nicotine and submitted to abdominoplasty using 2-octyl cyanoacrylate or nylon thread for the surgery suture. Thirty two rabbits were used. They were divided in subgroups: A1, A2, B1 e B2. Group A received saline 0.9%; group B received nicotine, both groups for 14 days before s...
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Objective: To analyze, through molecular biology, the diversity of the intestinal microbiota before and after resection of the ileocecal junction and reconstruction of intestinal transit with and without the creation of a neosphincter. Methods: Fourteen Wistar rats were divided into two groups: Group A (n = 7), submitted to resection of the ileo...
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Acute appendicitis is the most common cause of acute abdominal surgery. Despite nearly three decades comparing laparoscopic with laparotomic appendectomy, the available scientific evidence does not show consensus of opinion about the best access for the treatment of acute appendicitis. The transumbilical laparoscopic assisted appendectomy combines...
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To investigate the microscopic changes in the rectus abdominis muscle in rats subjected to five delay procedure. 30 male Holtzmann rats, weighting between 250 and 350 grams, were used. The animals were divided into five groups (n=6): A - cranial section of the right muscle; B - caudal section of the right muscle; C - craniocaudal section of the rig...
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To evaluate the impact on the AgNORs expression and apoptosis in the prostate of the hamster-Mesocricetus auratus (HMA) submitted to the application of finasteride. Twenty male rodents of the species HMA (n = 20) were randomly assigned to groups of ten animals: Finasteride group (n = 10) and the Control group (n = 10). In the finasteride group 7.14...
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RACIONAL: Descrita há mais de 70 anos, a colangiografia transoperatória é método eficaz de estudo da via biliar. Existem diversas formas de sua realização. OBJETIVO: Acrescentar uma nova forma de colangiografia em relação à técnica clássica usando somente duas radiografias para interpretação estática e dinâmica. MÉTODOS: A colangiografia é feita co...
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INTRODUÇÃO: As perdas de substância da parede abdominal são substituídas por próteses sintéticas. Acontecem vantagens e desvantagens. O omento maior é uma estrutura totipotente e se aplica, também, à reparação. OBJETIVO: Apresentar possibilidade técnica de fechamento de parede abdominal com omento após ressecção da parte muscular. MÉTODO: Operou-se...
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To evaluate the effect of hyperbaric oxygen therapy on the survival and weight of rats submitted to subtotal splenectomy and on the viability and growth of the inferior pole. Forty Wistar rats underwent subtotal splenectomy with preservation of the inferior pole and distributed into two groups: Group A (n=20) - not treated with hyperbaric oxygen, G...
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INTRODUÇÃO: Quando se faz ileostomia com a papila, a perda líquida é bem menor e a irritação local às vezes é nula, podendo o paciente viver sem o uso da bolsa. OBJETIVO: Mostrar uma técnica operatória em que se preserva a papila na ileostomia ou na anastomose íleo-retal. Ela consta da preservação da vasculatura do ceco e íleo terminal e secção do...
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Chronic groin pain after herniorrhaphy is a concern, as approximately 10% of patients undergoing inguinal hernia repair have symptoms, which often limit physical ability. The etiopathogenesis is related to periostitis pubis (somatic pain) and more often to nerve injury (neuropathic pain). It is clinically important to distinguish between these two...
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To evaluate the feasibility and safety of subtotal splenectomy by laparoscopy with inferior pole preservation and to determine the viability of the splenic remnant. Twenty male Wistar rats weighing between 365 g and 474 g (mean 417.92 ± 36.15g SD) were operated and randomly assigned to two groups : Group 1 rats were killed on postoperative day 10 (...
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INTRODUCTION: Electrosurgery technology is known in a long time ago, and has gained increasing prominence. Nevertheless, it still presents many risks as to its use. Several lesions can be caused by electrocautery, and burns are the most frequent complications. There is not always patient's cooperation regarding preventive measures. METHOD: Review o...
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To study the functional and morphological features of splenic autoimplants in rats subjected, or not, to postoperative hyperbaric oxygen therapy. One hundred and five male Wistar rats, weighing 251.6 g ± 29.5 g, were studied ot early (11th day) and late (70th day ) postoperative periods. For each period the animals were distributed in the following...
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OBJETIVO: Estudar aspectos morfológicos e funcionais dos autoimplantes esplênicos de ratos submetidos ou não à oxigenioterapia hiperbárica (OHB). MÉTODOS: Foram estudados em dois períodos distintos 105 ratos Wistar. No período mediato (n= 56) os animais foram avaliados até o 11º dia de pós-operatório, e no período tardio (n= 49), até o 70º dia. Em...
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BACKGROUND: The physician's greatest effort at the inguinal hernia surgery is to prevent its recurrence. AIM: To communicate the use of free flap of "fascia transversalis" added to a triangular inguinal reinforcement. METHODS: It was proceeded a surgery on a patient who carried a direct inguinal hernia, whose "fascia transversalis" was wide, thick...
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Purpose: Evaluate the effects of finasteride on the serum PSA and on the prostate of hamster-Mesocricetus auratus(hMa). Methods: Twenty hMa male adults were split in groups control and experimental (n=10). Animals of the experimental group received 7.14ng/mL of finasteride, subcutaneously (SC) on the back three times per week, during 90 days. Th...
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To identify the veins draining from the pancreatic tail to the lienal vein and its possible relationship with the loss of the distal splenorenal shunt selectivity. Thirty eight human blocks including stomach, duodenum, spleen, colon and pancreas, removed from fresh corpses, were studied with the replenish and corrosion technique, using vinilic resi...
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To study the correlation between the blood vessels and the smooth muscles in the hernial sac. 250 surgeries were done to correct inguinal hernias, in children and adults from two months to 75 years old, from March 2002 and February 2003. A hundred ninety two hernial sacs were isolated in 184 surgeries and only eight patients were treated of bilater...
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The objective is to alert the surgeon about the indiscriminate use of synthetic prosthesis in the correction of inguinal and incisional hernias. The authors provide a brief history of surgery on hernias and a review of the literature, showing the importance of classifying inguinal hernias to fit the type of surgical correction with the defect found...
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BACKGROUND: This present study shows the preoperative and postoperative serum gastric, a fundamental hormone in the production of gastric chloridric acid, correlating these findings with postoperative complications, in patients submitted to GVBYR. METHODS: We selected 20 patients with body mass index (BMI) over 40 Kg/m2 after a rigorous psychologic...
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To study the safety and efficiency of two anesthetic blockages in hemorrhoidectomy and the effect of clonidine on analgesia. 80 patients were studied, randomly divided into four groups: l (n=19)- peridural with a 0,75% ropivacaine; 2 (n=21)-peridural with a 0,75% ropivacaine and 150 microg of clonidine; 3 (n=19)- subarachnoid with a 0,5% bupivacain...
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BACKGROUND: to evaluate the role of artificial valves created by double circumferential seromyotomies in the villi length, in the small intestine diameter and in the weight of rats. METHOD: 40 rats have been distributed into four groups. The R Group animals were submitted to the resection of 50% of the small intestine, without the creation of valve...
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OBJETIVO: Avaliar o papel de válvulas artificiais constituídas por seromiotomias circunferenciais duplas no comprimento dos vilos, no diâmetro do intestino delgado e no peso de ratos. MÉTODO: Foram utilizados 40 ratos, distribuídos em quatro grupos. Os animais do Grupo R foram submetidos à ressecção de 50% do intestino delgado, sem criação de válvu...
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Based on the knowledge of the anti-inflammatory and anti-bacterial actions of local anesthetics (LA), the objective of this study was to determine the effects of peritoneal lavage with bupivacaine on survival of mice with fecal peritonitis. Forty-eight Wistar mice, weighing between 300 and 330 g (311.45 +/- 9.67 g), undergoing laparotomy 6 hours af...
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OBJETIVO: Aplicar o método apendicectomia videoassistida em porta única transumbilical (AVATU) e avaliar a sua efetividade e a sua segurança. MÉTODO: A AVATU visa combinar os benefícios do acesso laparoscópico com a segurança e simplicidade da remoção do apêndice pela técnica convencional. Analisou-se, retrospectivamente, 300 adolescentes e adultos...
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To elaborate an animal model with the objective of studying the continence of the biological valves surgically performed in the left colon of rats. Thirty four rats were operated on and divided into three groups (G). G1 (sham) animals which underwent laparotomy only; G2 (perineal amputation without valves): animals which underwent amputation of the...
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To study the effect of finasteride on the spermatogenesis of adult Mesocricetus auratus. Twenty adult hamsters were evaluated. The animals were one year-older, and were randomly divided in 2 different groups: control group with ten animals (n=10) and experimental group also with ten animals (n=10). The animals in the experimental group were shot 7....
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OBJETIVO: Avaliar as alterações morfológicas ocorridas após à confecção de esfíncteres no intestino delgado de ratos. MÉTODO: Foram estudados 30 ratos, Wistar, distribuídos em três grupos de 10 animais. Grupo A, controle, foi retirado um segmento de intestino delgado de 20mm de extensão. Grupo B, foram realizados dois esfíncteres, um a 100mm e outr...
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BACKGROUND: To evaluate variations in weight and diameter of the bowel rats submitted to small bowel surgical sphincter construction comparing values before and after surgery and to study modifications in the mucosal villus. METHOD: Thirty Wistar rats were submitted to the study divided in three groups of ten. Group A (control) - a segment of small...
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To determine whether the lower pole of the spleen grows after subtotal splenectomy following ligature of major spleen blood vessels. Thirty-nine Wistar rats (328.8 +/- 27.8 g) submitted to subtotal splenectomy with preservation of the lower splenic pole were divided into two groups: group 1 (control, n=20), immediate removal of the lower pole; grou...
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To study the effects of peritoneal lavage with a 2% lidocaine solution, on the survival of the rats submitted to peritonitis caused by their own feces. Forty-eight Wistar rats, weighting between 300 g and 330 g (mean, 311,45 +/-9,67 g), were submitted to laparotomy 6 hours following induction of fecal peritonitis. Animals were randomly divided into...
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OBJETIVO: Estudar aspectos funcionais e morfológicos do pólo inferior do baço de ratos tratados ou não com oxigênio hiperbárico no pós-operatório. MÉTODOS: Foram operados 79 ratos, Wistar, pesando 248,7g ± 27 , distribuídos em dois grupos: A – Simulação (n= 40), B – pólo inferior (n=39), e divididos em dois subgrupos: 11 e 70 dias. Cada subgrupo fo...
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To study the functional and morphological features of the lower pole of the spleen in rats submitted, or not, to postoperative hyperbaric oxygen therapy. Seventy-nine Wistar rats, weighing 248.7 +/- 27 g, divided into two groups [group A - simulation (n=40), group B - lower pole (n=39)] underwent surgery and were subdivided into two groups: 11 and...
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BACKGROUND: To compare the results of the inguinal hernia repair with the Falci-Lichtenstein (FL) tecnique that uses polypropylene mesh and the Shouldice modified by Berliner (SB) tecnique, a repair in two layers of continuous suture. METHODS: It is presented a prospective study of 312 patients operated on between 1997 and 2004 by one single surgeo...
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To carry out an anatomic study of superior laryngeal nerve in not preserved in formaldehyde and not frozen corpses. Thirty-eight male corpses from the Minas Gerais Medico-legal Institute (IML) were studied. In 18 corpses dissection was performed bilaterally and in 20 only on the left side, total number 56 nerves dissected. Their descriptive segment...
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OBJETIVO: Verificar o efeito da esplenectomia total e da ligadura dos vasos esplênicos principais nos lípides plasmáticos de ratos alimentados com dieta controle ou dieta acrescida de 2,5% de colesterol. MÉTODOS: Foram utilizados 99 ratos Wistar, machos, pesando entre 273 g e 427 g (MA 349,46; DP 35,54), distribuídos aleatoriamente em quatro grupos...
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The objective was to verify the effect of total splenectomy and ligature of the splenic vessels on the plasma lipid levels in rats fed a control diet or a diet supplemented with 2.5% cholesterol. Ninety-nine male Wistar rats weighting between 273 and 427 g (arithmetic mean: 349.46 +/-35.54) were randomly divided into four groups: group 1- control (...
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Purpose: To assess functional and morphological aspects of spleen auto-implants and of the splenic inferior pole of rats, post-operatively treated or not with hyperbaric oxygen, as well as the survival of these animals, were studied. Methods: Seventy-eight male Wistar rats, weighing between 192 and 283 g ( 238,3 +/- 9,6g), were randomly distribu...
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BACKGROUND AND PURPOSE: To undertake a morphometric comparative study of the longitudinal and circular layers of the small bowel muscularis propria in rats, whom underwent surgical construction of one and two pylorus in the small bowel, utilizing the technique of the creation of two pylorus described by Rena et al. METHODS: 52 male Wistar rats were...
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OBJETIVO: Geral: avaliar o desempenho do sistema APACHE II no pré-operatório de operações de grande e pequeno porte como indicador prognóstico. Os objetivos secundários são: (a) avaliar o sistema no pré-operatório para predizer morbidade; (b) comparar resultados entre os dois grupos e; (c) comparar a mortalidade observada com a esperada, calculada...
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To assess the possibility of preserving the lower pole of the spleen, supplied by the inferior lobar vessels and segmental vessels, or by vessels of the gastrosplenic ligament, in subtotal splenectomy; to study the viability and function of the lower pole of the spleen. Thirty-six male Wistar rats were used in this study. Said animals weighed 273-3...
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BACKGROUND: To verify the effect on plasmatic lipid level of rats feed with control diet and diet added with 2.5% pure cholesterol after total splenectomy, ligature of the splenic vessels and partial splenectomy with preservation of the inferior pole. METHODS: One hundred and eleven male Wistar rats weighting between 273 and 427g aged 12 weeks, wer...
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BACKGROUND: To verify the effect on plasmatic lipid level of rats feed with control diet and diet added with 2.5% pure cholesterol after total splenectomy, ligature of the splenic vessels and partial splenectomy with preservation of the inferior pole. METHODS: One hundred and eleven male Wistar rats weighting between 273 and 427g aged 12 weeks, wer...
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Professional responsibility is an inherent factor to the medical activity. Therefore, the adoption of a healthy conduct based on good relationship between the physician and the patient, as well as the understanding of this professional of the several aspects involved in the inguinal hernia repairs, are considered the better means to protect himself...
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Professional responsibility is an inherent factor to the medical activity. Therefore, the adoption of a healthy conduct based on good relationship between the physician and the patient, as well as the understanding of this professional of the several aspects involved in the inguinal hernia repairs, are considered the better means to protect himself...
Article
BACKGROUND: The objective of this work is to verify total PSA in young and adult Syrian Hamster and demonstrate a possible correlation among those levels and sexual anexes histological changes: prostate, seminal vesicles and testicles. METHODS: On this experimental study ten young Hamsters were used, with ages below seven weeks, and twenty animals...
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OBJETIVO: Verificar os níveis de PSA total no Hamster Sírio, Mesocricetus auratus, jovem e adulto e demonstrar possíveis correlações entre esses níveis com as alterações histológicas dos anexos sexuais: próstata, vesículas seminais e testículos. MÉTODO: Foram examinados dez (n=10) Hamsters jovens, com idade inferior a sete semanas de vida e vinte (...
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OBJECTIVE: To investigate the effects of splenic artery and vein ligation and the influence of hyperbaric oxygen after the double vascular ligation on the viability of spleen tissue. Methods: Sixty nine adult male Wistar rats (285-375g) were randomly separated in three groups: group 1, four rats, sham operated, group 2, 34 rats, submitted to simult...