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1.
ACS Biomater Sci Eng ; 9(6): 2911-2923, 2023 06 12.
Article in English | MEDLINE | ID: mdl-34779601

ABSTRACT

Nanodelivery of drugs aims to ensure drug stability in the face of adverse biochemical conditions in the course of administration, concomitant with appropriate pharmacological action provided by delivery at the targeted site. In this study, the application potential of a nanoparticle produced with biopolymers chitosan-N-arginine and alginate as an oral drug delivery material is evaluated. Both macromolecules being weak polyelectrolytes, the nanoparticle presents strong thermodynamic interactions with a biological model membrane consisting of a charged lipid liposome bilayer, leading to membrane disruption and membrane penetration of the nanoparticles in ideal conditions of pH corresponding to the oral route. The powder form of the nanoparticle was obtained by lyophilization and with a high percentage of entrapment of the anthelmintic drug praziquantel. In vivo studies were conducted with oral administration to Corydoras schwartzi fish with high intensity of intestinal parasites infection. The in vivo experiments confirmed the mucoadhesive and revealed membrane-penetrating properties of the nanoparticle by translocating the parasite cyst, which provided target drug release and reduction of over 97% of the fish intestinal parasites. Thus, it was evidenced that the nanoparticle was effective in transporting and releasing the drug to the target, providing an efficient treatment.


Subject(s)
Chitosan , Nanoparticles , Parasites , Animals , Drug Delivery Systems , Drug Liberation , Nanoparticles/chemistry
2.
Acta sci. vet. (Online) ; 49: Pub. 1810, 15 maio 2021. graf
Article in Portuguese | VETINDEX | ID: vti-30579

ABSTRACT

Background: Perineal hernia is a serious disease characterized by weakening or atrophy and separation of the muscles andfasciae of the perineal musculature, followed by the caudal displacement of pelvic and abdominal organs to the perineumregion. Treatment is invariably surgical and several approaches have been proposed, but complication and recurrence ratesremain high. This study aimed to evaluate 120 cases of perineal hernia treated at the Veterinary Hospital of Uberaba (HVU)from 2005 to 2020, addressing the clinical and surgical aspects and the postoperative period, seeking to identify the mostrelevant factors to improve care and treatment of future patients affected by this disease.Materials, Methods & Results: The medical records of dogs with a definitive diagnosis of perineal hernia were collected.The prevalence of perineal hernia was calculated. Data were obtained regarding sex, being castrated or not, age, bodymass, race, clinical signs, affected side, possibility of hernia reduction, treatments used, associated pathologies. Of the 120cases, only 69 underwent surgery at the HVU and from these cases data were obtained regarding hernia content, surgicaltechniques, surgical wires used, recurrences and postoperative complications. Fishers exact test was applied to assess theinfluence of the type of surgical treatment and surgical thread on the occurrence of complications and recurrences. Perineal hernia was the second most frequently observed hernia. Mixed breed, male, non-neutered and geriatric dogs were themost affected. The most frequently observed clinical signs were related to the digestive and urinary tract, consistent withthe most commonly found hernia contents (bladder, prostate and rectum). The simple herniorrhaphy technique was themost used and showed a high number of complications. The second most used technique was...(AU)


Subject(s)
Animals , Dogs , Dogs , Hernia/veterinary , Perineum/abnormalities , Surgical Fixation Devices/veterinary , Herniorrhaphy/veterinary
3.
Anat Histol Embryol ; 50(3): 588-593, 2021 May.
Article in English | MEDLINE | ID: mdl-33620085

ABSTRACT

The use of biological membranes in surgeries is a reality for years, and one of the most used is the bovine pericardium, so the purpose of this research is to describe the bovine pericardium's biomechanics by comparing two directions of a test, one parallel to the longitudinal heart axis and one perpendicular. 20 adult bovine pericardium were tested for the maximum rupture force and rupture elongation, collecting four samples of each pericardium direction. In phase 2, eight pericardia were conserved for 4 months in a 98% glycerine solution, and the solution in which they were submerged was microbiologically analysed monthly. The Mann-Whitney test was used; there was a very significant difference between the perpendicular and parallel groups (p = .0001). The T test showed no significant difference for the rupture elongation (p = .0938). In pericardium preserved in glycerine, the outliers were removed regarding the maximum rupture force, and a Boxcox transformation was performed (λ = 0.25). Outliers were removed for the rupture elongation, and Bartlett's test (p = .7836), and Cramer-Von Mises (p = .5033) were performed and then, the analysis of variance (p < .0001), followed by the Tukey test at 5%. In the microbiological analysis, there was no presence of microorganisms during conservation. The research has shown that the pericardium collection direction influences its resistance and it can be stored in glycerine for 4 months without losing biomechanical characteristics.


Subject(s)
Pericardium , Animals , Biomechanical Phenomena , Cattle
4.
Acta sci. vet. (Impr.) ; 49: Pub.1810-2021. graf
Article in Portuguese | VETINDEX | ID: biblio-1458449

ABSTRACT

Background: Perineal hernia is a serious disease characterized by weakening or atrophy and separation of the muscles andfasciae of the perineal musculature, followed by the caudal displacement of pelvic and abdominal organs to the perineumregion. Treatment is invariably surgical and several approaches have been proposed, but complication and recurrence ratesremain high. This study aimed to evaluate 120 cases of perineal hernia treated at the Veterinary Hospital of Uberaba (HVU)from 2005 to 2020, addressing the clinical and surgical aspects and the postoperative period, seeking to identify the mostrelevant factors to improve care and treatment of future patients affected by this disease.Materials, Methods & Results: The medical records of dogs with a definitive diagnosis of perineal hernia were collected.The prevalence of perineal hernia was calculated. Data were obtained regarding sex, being castrated or not, age, bodymass, race, clinical signs, affected side, possibility of hernia reduction, treatments used, associated pathologies. Of the 120cases, only 69 underwent surgery at the HVU and from these cases data were obtained regarding hernia content, surgicaltechniques, surgical wires used, recurrences and postoperative complications. Fisher’s exact test was applied to assess theinfluence of the type of surgical treatment and surgical thread on the occurrence of complications and recurrences. Perineal hernia was the second most frequently observed hernia. Mixed breed, male, non-neutered and geriatric dogs were themost affected. The most frequently observed clinical signs were related to the digestive and urinary tract, consistent withthe most commonly found hernia contents (bladder, prostate and rectum). The simple herniorrhaphy technique was themost used and showed a high number of complications. The second most used technique was...


Subject(s)
Animals , Dogs , Dogs , Hernia/veterinary , Perineum/abnormalities , Surgical Fixation Devices/veterinary , Herniorrhaphy/veterinary
5.
Acta sci. vet. (Online) ; 48(suppl.1): Pub. 510, 13 jun. 2020. ilus
Article in Portuguese | VETINDEX | ID: vti-33395

ABSTRACT

Background: Hernias are changes with the displacement of organs from their normal anatomical location to a newly formedcavity, which can cause pain and dysfunction of the affected organ. The diagnosis can be obtained by palpation or by ultrasound.The treatment of choice is surgical and vision to promote the return of the organ to its normal anatomical position and theclosure of the hernial ring. When affixing the edges of the hernial ring is not possible, alternative techniques such as the useof biological or synthetic membranes should be sought. The aim of the present study is to report an atypical case of inguinalhernia with splenic incarceration, in which splenectomy and herniorrhaphy with a bovine phrenic center were performed.Case: An 8-year-old large mestizo male dog was referred to the Veterinary Hospital of Uberaba complaining of the appearance of a mass in the inguinal region that increased significantly in the last 15 days. On physical examination, there was anincrease in volume in the left inguinal region, irreducible and great pain sensitivity in the region. The hemogram showednormochromic normocytic anemia, hyperproteinemia and thrombocytopenia. No changes were observed in the biochemicalanalyzes. Urinalysis revealed the presence of protein and traces of occult blood. Ultrasound showed an enlarged spleen insidethe hernial sac, closing the diagnosis of inguinal hernia. The animal underwent a herniorrhaphy procedure associated with theuse of a biological membrane from a bovine phrenic center and splenectomy. In addition, contralateral inguinal hernia wasobserved. The animal remained hospitalized and under observation for three days. On return, after five days, the guardian..(AU)


Subject(s)
Animals , Male , Dogs , Hernia, Inguinal/surgery , Hernia, Inguinal/veterinary , Spleen/diagnostic imaging , Spleen/surgery , Heterografts , Ultrasonography/veterinary , Abdomen/surgery
6.
Acta sci. vet. (Impr.) ; 48(suppl.1): Pub.510-4 jan. 2020. ilus
Article in Portuguese | VETINDEX | ID: biblio-1458337

ABSTRACT

Background: Hernias are changes with the displacement of organs from their normal anatomical location to a newly formedcavity, which can cause pain and dysfunction of the affected organ. The diagnosis can be obtained by palpation or by ultrasound.The treatment of choice is surgical and vision to promote the return of the organ to its normal anatomical position and theclosure of the hernial ring. When affixing the edges of the hernial ring is not possible, alternative techniques such as the useof biological or synthetic membranes should be sought. The aim of the present study is to report an atypical case of inguinalhernia with splenic incarceration, in which splenectomy and herniorrhaphy with a bovine phrenic center were performed.Case: An 8-year-old large mestizo male dog was referred to the Veterinary Hospital of Uberaba complaining of the appearance of a mass in the inguinal region that increased significantly in the last 15 days. On physical examination, there was anincrease in volume in the left inguinal region, irreducible and great pain sensitivity in the region. The hemogram showednormochromic normocytic anemia, hyperproteinemia and thrombocytopenia. No changes were observed in the biochemicalanalyzes. Urinalysis revealed the presence of protein and traces of occult blood. Ultrasound showed an enlarged spleen insidethe hernial sac, closing the diagnosis of inguinal hernia. The animal underwent a herniorrhaphy procedure associated with theuse of a biological membrane from a bovine phrenic center and splenectomy. In addition, contralateral inguinal hernia wasobserved. The animal remained hospitalized and under observation for three days. On return, after five days, the guardian..


Subject(s)
Male , Animals , Dogs , Spleen/surgery , Spleen/diagnostic imaging , Hernia, Inguinal/surgery , Hernia, Inguinal/veterinary , Heterografts , Abdomen/surgery , Ultrasonography/veterinary
7.
R. cient. eletr. Med. Vet. ; 30jan. 2018. ilus
Article in Portuguese | VETINDEX | ID: vti-738103

ABSTRACT

Um equino macho, com 6 anos de idade, foi atendido no Hospital Veterinário, com carcinoma de células escamosa, após o animal ter sido previamente tratado com quimioterápico 5 Fluorouracil tópico para reduzir a ferida, após o tratamento foi realizado a excisão cirúrgica do tumor, e na lesão resultante do procedimento cirúrgico, foi realizado o curativo com pericárdio bovino conservado em glicerina a 98%, o tratamento durou 30 dias com boa remissão da ferida, apresentando boa contração da ferida, sem produção de secreção. O pericárdio bovino é uma opção barata e de fácil conservação em feridas extensas em equinos.(AU)


A 6-year-old male horse was treated at the Veterinary Hospital with squamous cell carcinoma after the animal had been previously treated with topical Fluorouracil 5 to reduce the wound, after the treatment the tumor was excised surgically, and in the lesion resulting from the surgical procedure, the dressing was performed with 98% glycerin preserved bovine pericardium, the treatment lasted for 30 days with good wound remission, showing good contraction of the wound, without secretion. The bovine pericardium is an inexpensive and easy-care option in extensive wounds on horses.(AU)


Subject(s)
Animals , Pericardium/transplantation , Organ Preservation/veterinary , Carcinoma, Squamous Cell/surgery , Carcinoma, Squamous Cell/veterinary , Horses/surgery , Surgical Wound/veterinary , Glycerol , Cattle , Wound Healing
8.
Article in Portuguese | VETINDEX | ID: biblio-1494284

ABSTRACT

Um equino macho, com 6 anos de idade, foi atendido no Hospital Veterinário, com carcinoma de células escamosa, após o animal ter sido previamente tratado com quimioterápico 5 Fluorouracil tópico para reduzir a ferida, após o tratamento foi realizado a excisão cirúrgica do tumor, e na lesão resultante do procedimento cirúrgico, foi realizado o curativo com pericárdio bovino conservado em glicerina a 98%, o tratamento durou 30 dias com boa remissão da ferida, apresentando boa contração da ferida, sem produção de secreção. O pericárdio bovino é uma opção barata e de fácil conservação em feridas extensas em equinos.


A 6-year-old male horse was treated at the Veterinary Hospital with squamous cell carcinoma after the animal had been previously treated with topical Fluorouracil 5 to reduce the wound, after the treatment the tumor was excised surgically, and in the lesion resulting from the surgical procedure, the dressing was performed with 98% glycerin preserved bovine pericardium, the treatment lasted for 30 days with good wound remission, showing good contraction of the wound, without secretion. The bovine pericardium is an inexpensive and easy-care option in extensive wounds on horses.


Subject(s)
Animals , Carcinoma, Squamous Cell/surgery , Carcinoma, Squamous Cell/veterinary , Horses/surgery , Surgical Wound/veterinary , Pericardium/transplantation , Organ Preservation/veterinary , Cattle , Wound Healing , Glycerol
9.
Nosso Clín. ; 18(104): 12-18, Mar.-Apr.2015. ilus
Article in Portuguese | VETINDEX | ID: vti-737516

ABSTRACT

As membranas biológicas e implantes sintéticos vêm sendo pesquisados com o objetivo de avaliar sua eficiência e ausência de efeitos indesejáveis, (como rejeição e resposta inflamatória exacerbada)na reparação de alterações anatômicas congênitas ou adquiridas. Dentre as membranas biológicas utilizadas, o pericárdio bovino é utilizado devido a algumas características desejáveis, como baixo custo e um nível insignificante de complicações. A glicerina a 98% é bastante utilizada para a preservação do pericárdio bovino devido a suas características químicas e biológicas. Assim sendo, este trabalho tem por objetivo mostrar a diversidade de indicação da utilização do pericárdio bovino conservado em glicerina 98% em 22 pacientes submetidos a procedimentos cirúrgicos em cães. Os resultados obtidos foram satisfatórios, não observando rejeição ao implante.(AU)


The biological membranes and synthetic implants have been studied aiming to evaluate it sefficiency and absence of un desirable effects such as rejection and exacerbated inflammatory response in the repair of congenital or acquired anatomical changes. Among the biological membranes used bovine pericardium is used mainly due to some desirable characteristics such as low cost and negligible level of complications. A 98% glycerin is widely used for the preservation of bovine pericardium because of its chemical and biological characteristics. Thus, this work aims to show the diversity of indication of theuse of bovine pericardium preserved in glycerol 98% in 22 patients undergoing surgical procedures indogs. The results observed is satisfactory and don't see rejection of the implant ar another undesirable complications.(AU)


Las membranas biológicas y los implantes sintéticos han sido estudiados con el objetivo de evaluar su eficacia y falta de efectos indeseables, tales como rechazo y exacerbada respuesta inflamatoria en la reparación de los cambios anatómicos congénitos o adquiridos. Entre las membranas biológicas utilizadas pericardio bovino se utiliza principalmente debido ai bajo costo y las un nivel insignificante de complicaciones. Un glicerina 98% es ampliamente utilizado para la preservación de pericardio bovino para dividir sus características químicas y biológicas. Para tanto, este trabajo pretende mostrar la diversidad de la indicación dei uso de pericardio bovino conservado en glicerol ai 98% en 22 pacientes sometidos a procedimientos quirúrgicos en los perros. Los resultados fureran buenos y no observaron rechazo dei implante.(AU)


Subject(s)
Animals , Dogs , Pericardium/transplantation , Glycerol , Transplants , Membranes , Organ Preservation/veterinary
10.
Nosso clínico ; 18(104): 12-18, Mar.-Apr.2015. ilus
Article in Portuguese | VETINDEX | ID: biblio-1485863

ABSTRACT

As membranas biológicas e implantes sintéticos vêm sendo pesquisados com o objetivo de avaliar sua eficiência e ausência de efeitos indesejáveis, (como rejeição e resposta inflamatória exacerbada)na reparação de alterações anatômicas congênitas ou adquiridas. Dentre as membranas biológicas utilizadas, o pericárdio bovino é utilizado devido a algumas características desejáveis, como baixo custo e um nível insignificante de complicações. A glicerina a 98% é bastante utilizada para a preservação do pericárdio bovino devido a suas características químicas e biológicas. Assim sendo, este trabalho tem por objetivo mostrar a diversidade de indicação da utilização do pericárdio bovino conservado em glicerina 98% em 22 pacientes submetidos a procedimentos cirúrgicos em cães. Os resultados obtidos foram satisfatórios, não observando rejeição ao implante.


The biological membranes and synthetic implants have been studied aiming to evaluate it sefficiency and absence of un desirable effects such as rejection and exacerbated inflammatory response in the repair of congenital or acquired anatomical changes. Among the biological membranes used bovine pericardium is used mainly due to some desirable characteristics such as low cost and negligible level of complications. A 98% glycerin is widely used for the preservation of bovine pericardium because of its chemical and biological characteristics. Thus, this work aims to show the diversity of indication of theuse of bovine pericardium preserved in glycerol 98% in 22 patients undergoing surgical procedures indogs. The results observed is satisfactory and don't see rejection of the implant ar another undesirable complications.


Las membranas biológicas y los implantes sintéticos han sido estudiados con el objetivo de evaluar su eficacia y falta de efectos indeseables, tales como rechazo y exacerbada respuesta inflamatoria en la reparación de los cambios anatómicos congénitos o adquiridos. Entre las membranas biológicas utilizadas pericardio bovino se utiliza principalmente debido ai bajo costo y las un nivel insignificante de complicaciones. Un glicerina 98% es ampliamente utilizado para la preservación de pericardio bovino para dividir sus características químicas y biológicas. Para tanto, este trabajo pretende mostrar la diversidad de la indicación dei uso de pericardio bovino conservado en glicerol ai 98% en 22 pacientes sometidos a procedimientos quirúrgicos en los perros. Los resultados fureran buenos y no observaron rechazo dei implante.


Subject(s)
Animals , Dogs , Glycerol , Membranes , Pericardium/transplantation , Transplants , Organ Preservation/veterinary
11.
Arq. bras. med. vet. zootec ; 66(5): 1383-1391, Sep-Oct/2014. graf
Article in Portuguese | VETINDEX | ID: vti-12243

ABSTRACT

Na busca de material biológico alternativo para a realização de implantes, objetivou-se com o presente estudo avaliar comparativamente a implantação do peritônio de paca, uma nova opção de biomaterial, conservado em solução supersaturada de açúcar a 300 por cento e conservado em glicerina a 98 por cento na parede abdominal de ratos Wistar. Foram utilizados 60 ratos, machos, da linhagem Wistar, pesando entre 150 e 200 gramas, organizados nos seguintes grupos experimentais: grupo controle (GI), grupo peritônio conservado em solução supersaturada de açúcar a 300 por cento (GII) e grupo peritônio conservado em glicerina a 98 por cento (GIII), cada um com 20 animais. Os grupos GII e GIII receberam o enxerto de peritônio da paca conservado em solução de açúcar 300 por cento e glicerina 98 por cento, respectivamente, e o grupo GI não recebeu a membrana. Cinco ratos de cada grupo foram submetidos à eutanásia em quatro momentos distintos: sete, 15, 30 e 60 dias de pós-operatório para avaliações macroscópicas e microscópicas da interface implante-tecido nativo. Apesar de reações adversas observadas em 57,5 por cento dos animais do grupo GII e GIII, em 95 por cento dos animais desses grupos houve boa cicatrização da membrana. Na análise histológica, verificou-se a presença de grande infiltrado inflamatório nos períodos iniciais (sete e 15 dias) e grande presença de tecido conjuntivo nos momentos finais (30 e 60 dias). Concluiu-se que o peritônio da paca como membrana biológica conservado nos meios estudados pode ser utilizado com segurança na parede abdominal de ratos; ainda, que sua conservação em solução supersaturada de açúcar a 300 por cento permitiu melhor maleabilidade no ato cirúrgico.(AU)


In the search for alternative biological material to perform implants, this study aimed to compare the implantation of paca peritoneum, a new biomaterial option, preserved in supersaturated sugar solution 300 percent and preserved in glycerin 98 percent in the abdominal wall of Wistar rats. A total of 60 male rats from the Wistar strain weighing between 150 and 200 grams were housed into three different experimental groups: control group (GI), peritoneum preserved in supersaturated sugar solution 300 percent group (GII) and peritoneum preserved in glycerin 98 percent group (GIII), with 20 animals each. The GII and GIII received the paca peritoneum graft preserved in sugar solution 300 percent and glycerin 98 percent, respectively and group GI did not receive any membrane. Five rats from each group were euthanized at four different times: seven, 15, 30 and 60 days post-surgery for macroscopic and microscopic evaluations in graft-native tissue interface. Despite the adverse reactions observed in 57.5 percent of GII and GIII, there was good healing of the membrane in 95 percent of the animals in these groups. Upon histological examination there was a large presence of inflammatory infiltrates in the initial periods (seven and 15 days) and a large presence of connective tissue in the final stages (30 and 60). It was concluded that the paca peritoneum as biological membrane preserved as presented in this study can be used safely in the abdominal wall of rats, the preservation in supersaturated sugar solution 300 percent allowed better flexibility during surgery.(AU)


Subject(s)
Animals , Cattle , Biocompatible Materials/analysis , Peritoneum , Cuniculidae , Rats, Wistar , Abdominal Wall , Wound Healing , General Surgery/trends
12.
Arq. bras. med. vet. zootec ; Arq. bras. med. vet. zootec. (Online);66(5): 1383-1391, Sep-Oct/2014. graf
Article in Portuguese | LILACS | ID: lil-729753

ABSTRACT

Na busca de material biológico alternativo para a realização de implantes, objetivou-se com o presente estudo avaliar comparativamente a implantação do peritônio de paca, uma nova opção de biomaterial, conservado em solução supersaturada de açúcar a 300 por cento e conservado em glicerina a 98 por cento na parede abdominal de ratos Wistar. Foram utilizados 60 ratos, machos, da linhagem Wistar, pesando entre 150 e 200 gramas, organizados nos seguintes grupos experimentais: grupo controle (GI), grupo peritônio conservado em solução supersaturada de açúcar a 300 por cento (GII) e grupo peritônio conservado em glicerina a 98 por cento (GIII), cada um com 20 animais. Os grupos GII e GIII receberam o enxerto de peritônio da paca conservado em solução de açúcar 300 por cento e glicerina 98 por cento, respectivamente, e o grupo GI não recebeu a membrana. Cinco ratos de cada grupo foram submetidos à eutanásia em quatro momentos distintos: sete, 15, 30 e 60 dias de pós-operatório para avaliações macroscópicas e microscópicas da interface implante-tecido nativo. Apesar de reações adversas observadas em 57,5 por cento dos animais do grupo GII e GIII, em 95 por cento dos animais desses grupos houve boa cicatrização da membrana. Na análise histológica, verificou-se a presença de grande infiltrado inflamatório nos períodos iniciais (sete e 15 dias) e grande presença de tecido conjuntivo nos momentos finais (30 e 60 dias). Concluiu-se que o peritônio da paca como membrana biológica conservado nos meios estudados pode ser utilizado com segurança na parede abdominal de ratos; ainda, que sua conservação em solução supersaturada de açúcar a 300 por cento permitiu melhor maleabilidade no ato cirúrgico...


In the search for alternative biological material to perform implants, this study aimed to compare the implantation of paca peritoneum, a new biomaterial option, preserved in supersaturated sugar solution 300 percent and preserved in glycerin 98 percent in the abdominal wall of Wistar rats. A total of 60 male rats from the Wistar strain weighing between 150 and 200 grams were housed into three different experimental groups: control group (GI), peritoneum preserved in supersaturated sugar solution 300 percent group (GII) and peritoneum preserved in glycerin 98 percent group (GIII), with 20 animals each. The GII and GIII received the paca peritoneum graft preserved in sugar solution 300 percent and glycerin 98 percent, respectively and group GI did not receive any membrane. Five rats from each group were euthanized at four different times: seven, 15, 30 and 60 days post-surgery for macroscopic and microscopic evaluations in graft-native tissue interface. Despite the adverse reactions observed in 57.5 percent of GII and GIII, there was good healing of the membrane in 95 percent of the animals in these groups. Upon histological examination there was a large presence of inflammatory infiltrates in the initial periods (seven and 15 days) and a large presence of connective tissue in the final stages (30 and 60). It was concluded that the paca peritoneum as biological membrane preserved as presented in this study can be used safely in the abdominal wall of rats, the preservation in supersaturated sugar solution 300 percent allowed better flexibility during surgery...


Subject(s)
Animals , Cattle , Cuniculidae , Biocompatible Materials/analysis , Peritoneum , Abdominal Wall , General Surgery/trends , Rats, Wistar , Wound Healing
13.
Arq. bras. med. vet. zootec ; 66(1): 177-184, fev. 2014. ilus
Article in Portuguese | VETINDEX | ID: vti-10300

ABSTRACT

Neste estudo foi implantado um retalho de biomembrana de látex natural em substituição a um fragmento da parede de estômago de coelhos albinos, raça Nova Zelândia, adultos, machos não castrados (n=12), com o intuito de avaliar o processo de reparação tecidual no que se refere à biocompatibilidade, à capacidade de reparação tecidual e a possíveis complicações. Aos 15, 30 e 60 dias de pós-operatório, os animais foram sacrificados, mediante o emprego de tiopental sódico (200mg kg-1), para posterior avaliação macroscópica e análise histopatológica da interface do implante com o tecido nativo. Macroscopicamente, aos 15, 30 e 60 dias de pós-operatório observou-se presença de aderências na face serosa. Aos 60 dias de pós-operatório, em todos os animais avaliados, a biomembrana não foi encontrada. Sob microscopia de luz, aos 15 e 30 dias, verificaram-se descontinuidade das camadas muscular e mucosa, presença de infiltrado inflamatório polimorfonuclear. Foram visualizados vasos sanguíneos e fibras musculares. Aos 60 dias, as camadas mucosa, muscular estavam completamente reconstituídas. O implante foi biocompatível e forneceu arcabouço para orientação e desenvolvimento das camadas teciduais do estômago, mediante processos de reparação, restabelecendo a estrutura do órgão.(AU)


In this study, biomembrane of natural latex was utilized to replace a section of the stomach wall of New Zealand rabbits, adult and non-castrated males (n=12), in order to evaluate the tissue repair process in regards to its biocompatility, scar formation ability and possible complications. The animals were euthanized at fifteen, 30 and 60 days post operation, by use of sodium thiopental (200mg kg-1), followed by macroscopic and histopathological analysis of the implant interface with the native tissue. Macroscopically, at fifteen, 30, and 60 days post operation adherence was observed in the serosal wall. At 60 days post operation, the biomembrane is not in the stomach. Under light microscopy, at fifteen and 30 days, discontinuity of muscle layer and mucosa layer, and presence of polimorfonuclear population of inflammatory cells was observed. New vessels and muscle fibers were observed. At 60 days, the mucosa and muscle layers were complete reconstituted. The implants were biocompatible and had provided the mainframe for orientation and development of the tissue layers through repairing processes, thus reestablishing the organ structure.(AU)


Subject(s)
Animals , Rabbits , Prostheses and Implants/veterinary , Tissue Engineering , Stomach/anatomy & histology , Rabbits/classification
14.
Arq. bras. med. vet. zootec ; Arq. bras. med. vet. zootec. (Online);66(1): 177-184, fev. 2014. ilus
Article in Portuguese | LILACS | ID: lil-704022

ABSTRACT

Neste estudo foi implantado um retalho de biomembrana de látex natural em substituição a um fragmento da parede de estômago de coelhos albinos, raça Nova Zelândia, adultos, machos não castrados (n=12), com o intuito de avaliar o processo de reparação tecidual no que se refere à biocompatibilidade, à capacidade de reparação tecidual e a possíveis complicações. Aos 15, 30 e 60 dias de pós-operatório, os animais foram sacrificados, mediante o emprego de tiopental sódico (200mg kg-1), para posterior avaliação macroscópica e análise histopatológica da interface do implante com o tecido nativo. Macroscopicamente, aos 15, 30 e 60 dias de pós-operatório observou-se presença de aderências na face serosa. Aos 60 dias de pós-operatório, em todos os animais avaliados, a biomembrana não foi encontrada. Sob microscopia de luz, aos 15 e 30 dias, verificaram-se descontinuidade das camadas muscular e mucosa, presença de infiltrado inflamatório polimorfonuclear. Foram visualizados vasos sanguíneos e fibras musculares. Aos 60 dias, as camadas mucosa, muscular estavam completamente reconstituídas. O implante foi biocompatível e forneceu arcabouço para orientação e desenvolvimento das camadas teciduais do estômago, mediante processos de reparação, restabelecendo a estrutura do órgão.


In this study, biomembrane of natural latex was utilized to replace a section of the stomach wall of New Zealand rabbits, adult and non-castrated males (n=12), in order to evaluate the tissue repair process in regards to its biocompatility, scar formation ability and possible complications. The animals were euthanized at fifteen, 30 and 60 days post operation, by use of sodium thiopental (200mg kg-1), followed by macroscopic and histopathological analysis of the implant interface with the native tissue. Macroscopically, at fifteen, 30, and 60 days post operation adherence was observed in the serosal wall. At 60 days post operation, the biomembrane is not in the stomach. Under light microscopy, at fifteen and 30 days, discontinuity of muscle layer and mucosa layer, and presence of polimorfonuclear population of inflammatory cells was observed. New vessels and muscle fibers were observed. At 60 days, the mucosa and muscle layers were complete reconstituted. The implants were biocompatible and had provided the mainframe for orientation and development of the tissue layers through repairing processes, thus reestablishing the organ structure.


Subject(s)
Animals , Rabbits , Stomach/anatomy & histology , Prostheses and Implants , Tissue Engineering , Rabbits/classification
15.
Clín. Vet. ; 19(109): 58-66, 2014.
Article in English, Spanish, Portuguese | VETINDEX | ID: vti-10357

ABSTRACT

Um cão da raça shih tzu, apresentando tecido pigmentado com presença de pelos na córnea direita foi atendido em um hospital-escola. O exame oftálmico levou ao diagnóstico de tumor dermoide que acometia a córnea. O paciente foi submetido a ceratectomia superficial e ceratoplastia lamelar com utilização de membrana amniótica bovina preservada em glicerina 99%. Após quinze dias da cirurgia, foi observada a presença de tecido de granulação, vascularização, edema corneal e incorporação da membrana à córnea. Após 39 dias, a córnea apresentou moderada opacidade, e aos 74 dias da cirurgia ela havia diminuído significativamente, adquirindo assim uma satisfatória transparência corneal, o que denota um resultado positivo. De acordo com o resultado obtido, conclui-se que a membrana amniótica bovina, utilizada nas condições descritas, foi eficaz na reconstrução corneal, após ceratectomia superficial para remoção de tumor dermoide corneano, pois sua utilização permitiu tanto a reparação da córnea como um resultado estético satisfatório.(AU)


Abstract: A Shih Tzu with pigmented tissue containing hair in the right cornea was presented to a teaching hospital. A corneal dermoid tumor was diagnosed after ophthalmic examination. The patient underwent superficial keratectomy and lamellar keratoplasty using bovine amniotic membrane preserved in 99% glycerin. At fifteen days post-surgery, the presence of granulation tissue, vascularization, corneal edema and incorporation of the membrane to the cornea were observed. After thirty-nine days, the cornea presented moderate opacity, and seventy-four days after the surgery it had decreased considerably and was satisfactorily transparent, indicating a positive result. Taken together, the results presented herewith lead us to conclude that the bovine amniotic membrane was effective in corneal reconstruction after superficial keratectomy to remove the corneal dermoid tumor, since its use allowed the repair of the cornea.(AU)


Se atendió en un hospital escuela un perro Shih Tzu que presentaba tejido pigmentado y pelos en la cornea derecha. El examen oftalmológico llevó al diagnóstico de un tumor dermoide de córnea. El paciente fue sometido a una queratectomía superficial y queratoplastia lamelar utilizando membrana amniótica bovina preservada en glicerina al 99%. Después de quince días de realizada la cirugía, se pudo observar la presencia de tejido de granulación, vascularización, edema corneal e incorporación de la membrana a la córnea. Después de 39 días, la córnea presentaba una opacidad moderada, y a los 74 días la misma había disminuido significativamente, con una transparencia corneal satisfactoria, que fue considerada un resultado positivo. De acuerdo a estos resultados se puede concluir que la membrana amniótica bovina, utilizada bajo las condiciones de este trabajo, fue eficiente en la reconstrucción corneal, después de haberse realizado una queratectomía superficial para la retirada de un tumor dermoide corneal, ya que su uso permitió tanto la reparación de la cornea como un resultado estético satisfactorio.(AU)


Subject(s)
Animals , Cattle , Cornea/anatomy & histology , Ophthalmology , Corneal Edema/pathology , Dogs/classification , Cattle/classification
16.
Article in English, Spanish, Portuguese | VETINDEX | ID: biblio-1480960

ABSTRACT

Um cão da raça shih tzu, apresentando tecido pigmentado com presença de pelos na córnea direita foi atendido em um hospital-escola. O exame oftálmico levou ao diagnóstico de tumor dermoide que acometia a córnea. O paciente foi submetido a ceratectomia superficial e ceratoplastia lamelar com utilização de membrana amniótica bovina preservada em glicerina 99%. Após quinze dias da cirurgia, foi observada a presença de tecido de granulação, vascularização, edema corneal e incorporação da membrana à córnea. Após 39 dias, a córnea apresentou moderada opacidade, e aos 74 dias da cirurgia ela havia diminuído significativamente, adquirindo assim uma satisfatória transparência corneal, o que denota um resultado positivo. De acordo com o resultado obtido, conclui-se que a membrana amniótica bovina, utilizada nas condições descritas, foi eficaz na reconstrução corneal, após ceratectomia superficial para remoção de tumor dermoide corneano, pois sua utilização permitiu tanto a reparação da córnea como um resultado estético satisfatório.


Abstract: A Shih Tzu with pigmented tissue containing hair in the right cornea was presented to a teaching hospital. A corneal dermoid tumor was diagnosed after ophthalmic examination. The patient underwent superficial keratectomy and lamellar keratoplasty using bovine amniotic membrane preserved in 99% glycerin. At fifteen days post-surgery, the presence of granulation tissue, vascularization, corneal edema and incorporation of the membrane to the cornea were observed. After thirty-nine days, the cornea presented moderate opacity, and seventy-four days after the surgery it had decreased considerably and was satisfactorily transparent, indicating a positive result. Taken together, the results presented herewith lead us to conclude that the bovine amniotic membrane was effective in corneal reconstruction after superficial keratectomy to remove the corneal dermoid tumor, since its use allowed the repair of the cornea.


Se atendió en un hospital escuela un perro Shih Tzu que presentaba tejido pigmentado y pelos en la cornea derecha. El examen oftalmológico llevó al diagnóstico de un tumor dermoide de córnea. El paciente fue sometido a una queratectomía superficial y queratoplastia lamelar utilizando membrana amniótica bovina preservada en glicerina al 99%. Después de quince días de realizada la cirugía, se pudo observar la presencia de tejido de granulación, vascularización, edema corneal e incorporación de la membrana a la córnea. Después de 39 días, la córnea presentaba una opacidad moderada, y a los 74 días la misma había disminuido significativamente, con una transparencia corneal satisfactoria, que fue considerada un resultado positivo. De acuerdo a estos resultados se puede concluir que la membrana amniótica bovina, utilizada bajo las condiciones de este trabajo, fue eficiente en la reconstrucción corneal, después de haberse realizado una queratectomía superficial para la retirada de un tumor dermoide corneal, ya que su uso permitió tanto la reparación de la cornea como un resultado estético satisfactorio.


Subject(s)
Animals , Cattle , Cornea/anatomy & histology , Corneal Edema/pathology , Ophthalmology , Cattle/classification , Dogs/classification
17.
Ciênc. rural ; Ciênc. rural (Online);41(12): 2120-2127, Dec. 2011. ilus
Article in Portuguese | LILACS | ID: lil-608064

ABSTRACT

Os eventos que fazem parte do processo de reparação de lesões da córnea ocorrem simultaneamente e envolvem proliferação, migração, diferenciação e apoptose celular, além da comunicação intercelular. Vários fatores solúveis, além de proteínas da matriz mesenquimal, proteoglicanos, enzimas proteolíticas e alguns tipos celulares são abordados nesta revisão, na qual explicam-se os processos de reparação de lesões superficiais ou penetrantes da córnea. A membrana amniótica, muito utilizada na cirurgia oftálmica, foi estudada por apresentar funções que colaboram com o processo de reparação. Entretanto, tais funções poderão ser perdidas quando tal tecido for submetido à conservação. Assim, torna-se importante conhecer o processo de reparação de lesões que envolvem, ou não, a córnea em toda a sua espessura e escolher a melhor forma de utilização da membrana amniótica quando ela for indicada na terapia para estas lesões.


The events included in the process of repair of corneal damage occur simultaneously and involve proliferation, migration, differentiation, cell apoptosis and intercellular communication. Several soluble factors, mesenchymal matrix proteins, proteoglycans, proteolytic enzymes and some cell types are covered in this review, which explains the processes of repair of corneal wounds, either superficial or penetrating. The amniotic membrane, used in ophthalmic surgery, was studied because of the contribution of its functions to the repair process. However, these functions may be lost when the amniotic membrane is subjected to conservation. Therefore, it is important to understand the repair process of lesions involving or not the entire thickness of the cornea, and choose the best use of the amniotic membrane, when it is indicated for the treatment of these lesions.

18.
Ci. Rural ; 41(12)2011.
Article in Portuguese | VETINDEX | ID: vti-707459

ABSTRACT

The events included in the process of repair of corneal damage occur simultaneously and involve proliferation, migration, differentiation, cell apoptosis and intercellular communication. Several soluble factors, mesenchymal matrix proteins, proteoglycans, proteolytic enzymes and some cell types are covered in this review, which explains the processes of repair of corneal wounds, either superficial or penetrating. The amniotic membrane, used in ophthalmic surgery, was studied because of the contribution of its functions to the repair process. However, these functions may be lost when the amniotic membrane is subjected to conservation. Therefore, it is important to understand the repair process of lesions involving or not the entire thickness of the cornea, and choose the best use of the amniotic membrane, when it is indicated for the treatment of these lesions.


Os eventos que fazem parte do processo de reparação de lesões da córnea ocorrem simultaneamente e envolvem proliferação, migração, diferenciação e apoptose celular, além da comunicação intercelular. Vários fatores solúveis, além de proteínas da matriz mesenquimal, proteoglicanos, enzimas proteolíticas e alguns tipos celulares são abordados nesta revisão, na qual explicam-se os processos de reparação de lesões superficiais ou penetrantes da córnea. A membrana amniótica, muito utilizada na cirurgia oftálmica, foi estudada por apresentar funções que colaboram com o processo de reparação. Entretanto, tais funções poderão ser perdidas quando tal tecido for submetido à conservação. Assim, torna-se importante conhecer o processo de reparação de lesões que envolvem, ou não, a córnea em toda a sua espessura e escolher a melhor forma de utilização da membrana amniótica quando ela for indicada na terapia para estas lesões.

19.
Article in Portuguese | LILACS-Express | VETINDEX | ID: biblio-1478453

ABSTRACT

The events included in the process of repair of corneal damage occur simultaneously and involve proliferation, migration, differentiation, cell apoptosis and intercellular communication. Several soluble factors, mesenchymal matrix proteins, proteoglycans, proteolytic enzymes and some cell types are covered in this review, which explains the processes of repair of corneal wounds, either superficial or penetrating. The amniotic membrane, used in ophthalmic surgery, was studied because of the contribution of its functions to the repair process. However, these functions may be lost when the amniotic membrane is subjected to conservation. Therefore, it is important to understand the repair process of lesions involving or not the entire thickness of the cornea, and choose the best use of the amniotic membrane, when it is indicated for the treatment of these lesions.


Os eventos que fazem parte do processo de reparação de lesões da córnea ocorrem simultaneamente e envolvem proliferação, migração, diferenciação e apoptose celular, além da comunicação intercelular. Vários fatores solúveis, além de proteínas da matriz mesenquimal, proteoglicanos, enzimas proteolíticas e alguns tipos celulares são abordados nesta revisão, na qual explicam-se os processos de reparação de lesões superficiais ou penetrantes da córnea. A membrana amniótica, muito utilizada na cirurgia oftálmica, foi estudada por apresentar funções que colaboram com o processo de reparação. Entretanto, tais funções poderão ser perdidas quando tal tecido for submetido à conservação. Assim, torna-se importante conhecer o processo de reparação de lesões que envolvem, ou não, a córnea em toda a sua espessura e escolher a melhor forma de utilização da membrana amniótica quando ela for indicada na terapia para estas lesões.

20.
Arq. bras. med. vet. zootec ; 62(2): 324-331, abr. 2010. ilus
Article in Portuguese | VETINDEX | ID: vti-5792

ABSTRACT

Avaliou-se o efeito da eletroacupuntura (EA) sobre os aspectos macroscópicos e microscópicos em 36 coelhos que tiveram o tendão calcanear comum seccionado e que, após 30 dias, receberam enxerto de peritônio bovino conservado em solução saturada de sal. Após a cirurgia, os animais foram distribuídos em três grupos de igual número: os do grupo E10 foram estimulados pela EA do segundo ao 11º dia de pós-operatório, os do grupo E20 do 11º ao 31º dia de pós-operatório e os do grupo C não foram estimulados. Posteriormente, os animais foram redistribuídos em três subgrupos de igual número, os quais foram observados no pós-operatório por 11, 31 e 91 dias. Nos coelhos do E10 e E20, ocorreu diminuição de aderência da área enxertada aos tecidos circunvizinhos. Aos 31 dias de pós-operatório, observou-se nos do E10 tecido conjuntivo. Verificou-se intensa neovascularização no local enxertado em todos os animais que receberam estímulo pela EA. Nos coelhos do E10, aos 91 dias, verificou-se intensa quantidade de tecido conjuntivo, com fibras colágenas organizadas e paralelas ao eixo do tendão. O estímulo pela EA na fase precoce do pós-operatório estimulou a maturação cicatricial com mínima reação inflamatória.(AU)


The effects of eletro-acupuncture (EA) were evaluated on clinical and histological aspects in 36 rabbits that had the acchiles tendon sectioned and grafted after 30 days using bovine peritoneum graft preserved in saturated salt solution. The animals were randomly distributed into three groups. They were stimulated by EA from the 2nd to the 11th post-operative day (S10 group), from the 11th to the 31st post-operative day (S20 group), and were not stimulated (C group). Then, the rabbits were distributed into three sub-groups and were observed for 11, 31, and 91 days. The rabbits from S10 and S20 groups presented decreased adhesions between graft and adjacent tissues. The rabbits from S10 group showed connective tissue at 31 days of the post-operative period. Intense graft neovascularization was observed in all animals stimulated by EA. Large amounts of connective tissue with organized and parallel to the tendon axis collagen fibers were detected on the day 91st in the S10 group animals. The early EA stimulation during the post-operative period stimulated the tendon healing with minimal inflammatory reaction.(AU)


Subject(s)
Male , Female , Adult , Rabbits , Achilles Tendon/blood supply , Achilles Tendon/surgery , Achilles Tendon/transplantation , Electroacupuncture/methods , Electroacupuncture/trends , Electroacupuncture/veterinary , Peritoneum/transplantation , Rabbits/surgery
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