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1.
Acta cir. bras ; 39: e390324, 2024. tab, graf, ilus
Article in English | LILACS, VETINDEX | ID: biblio-1533359

ABSTRACT

Purpose: The current study aimed at evaluating the repair of a partial defect of the trachea with a muscle flap, an advanced technique that employs combined suture patterns. Methods: Sixteen healthy male New Zealand white rabbits were used as an experimental model. A partial defect in the trachea within the ventral region of the fourth to eighth tracheal ring was created. Subsequently, repair was initiated with a flap of the sternocephalicus muscle. The animals were divided into four groups for postoperative evaluation using clinical, tracheoscopic, and histopathological analyses. Each group was separated according to the time of euthanasia, programmed at interval of seven (G7), 15 (G15), 30 (G30), and 60 days (G60). Results: One animal from the G60 group died, whereas the other animals had good surgical recovery without serious changes in the breathing pattern. The major clinical signs observed were stridor and coughing. Tracheoscopy revealed secretions in the tracheal lumen, exuberant granulation, and stenosis. Histopathological analysis showed growth of the ciliary respiratory epithelium at the flap site 30 days after implantation. Conclusions: Partial repair showed satisfactory results owing to the anatomical location of the muscle, adequate vascular support, and structural and physiological maintenance without serious changes in the respiratory system.


Subject(s)
Animals , Rabbits , Rabbits/surgery , Surgical Flaps/veterinary , Tracheal Diseases/veterinary , Endoscopy/veterinary
2.
Acta cir. bras ; 38: e383523, 2023. tab, graf, ilus
Article in English | LILACS, VETINDEX | ID: biblio-1527600

ABSTRACT

Purpose: The aim of this randomized study was to compare the complications and perioperative outcome of three different techniques of laparoscopic cholecystectomy (LC). Changes in the liver function test after LC techniques were investigated. Also, we compared the degree of postoperative adhesions and histopathological changes of the liver bed. Methods: Thirty rabbits were divided into three groups: group A) Fundus-first technique by Hook dissecting instrument and Roeder Slipknot applied for cystic duct (CD) ligation; group B) conventional technique by Maryland dissecting forceps and electrothermal bipolar vessel sealing (EBVS) for CD seal; group C) conventional technique by EBVS for gallbladder (GB) dissection and CD seal. Results: Group A presented a longer GB dissection time than groups B and C. GB perforation and bleeding from tissues adjacent to GB were similar among tested groups. Gamma-glutamyl transferase and alkaline phosphatase levels increased (p ≤ 0.05) on day 3 postoperatively in group A. By the 15th postoperative day, the enzymes returned to the preoperative values. Transient elevation of hepatic transaminases occurred after LC in all groups. Group A had a higher adherence score than groups B and C and was associated with the least predictable technique. Conclusions: LC can be performed using different techniques, although the use of EBVS is highly recommended.


Subject(s)
Animals , Rabbits , Biliary Tract Surgical Procedures/veterinary , Cholecystectomy, Laparoscopic/veterinary , Cystic Duct , Gallbladder Diseases/veterinary
3.
Rev. bras. ciênc. vet ; 28(1): 23-29, jan./mar. 2021. ilus
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1491696

ABSTRACT

Na procura por material alternativo no tratamento de feridas cutâneas, buscou-se com este estudo avaliar o comportamento da túnica vaginal canina conservada em glicerina a 98% como curativo biológico no tratamento de feridas cutâneas provocadas experimentalmente em ratos. Foram utilizados 16 ratos Wistar, nos quais foram induzidas experimentalmente duas lesões cutâneas na região dorsal, sendo uma cranial e a outra caudal. Uma ferida serviu de controle, a qual não recebeu tratamento, a outra recebeu a túnica vaginal recobrindo toda extensão da lesão. A seleção de qual das feridas, cranial ou caudal, iria receber a membrana foi feita de forma aleatória. Os animais foram distribuídos em quatro grupos de igual número para análises clínicas, macroscópicas e histológicas decorridos três, sete, 14 e 21 dias de pós-operatório. Na avaliação clínica e macroscópica pode-se observar que o processo de reparação teve evolução semelhante tanto no grupo controle quanto no grupo membrana. Na análise histopatológica foi constatada grande quantidade de infiltrado inflamatório nos períodos iniciais, no entanto, decorridos 21 dias, a epiderme já se encontrava reparada, e em todos os momentos foi observada maior presença de tecido conjuntivo no grupo membrana, sugerindo maior precocidade na cicatrização. Deste modo, concluiu-se que a túnica vaginal canina pode ser utilizada como nova alternativa no tratamento de feridas cutâneas.


In the search for alternative material in the treatment of cutaneous wounds, this study aimed to evaluate the behavior of canine vaginal tunic conserved in glycerin 98% as a biological dressing in the treatment of cutaneous wounds provoked experimentally in rats. Sixteen animals were used in which two cutaneous lesions were caused in the dorsal region, one cranial and the other caudal. One wound served as a control which did not receive treatment, the other received the vaginal tunic covering all extension of the lesion. The selection of which of the wounds, cranial or caudal, would receive the membrane was made at random. The animals were divided into four groups of equal numbers for clinical, macroscopic, and histological analyzes after three, seven, 14 and 21 postoperative days. In the clinical and macroscopic evaluation, it can be observed that the healing process had similar evolution in both the control group and the membrane group. In the histopathological analysis, a large amount of inflammatory infiltrate was observed in the initial periods; however, after 21 days the epidermis was already healed, and at all times a greater presence of connective tissue was observed in the membrane group, suggesting a greater precocity in healing. Thus, it was concluded that the canine vaginal tunic can be used as a new alternative in the treatment of cutaneous wounds.


Subject(s)
Animals , Rats , Wound Healing , Glycerol , Biocompatible Materials , Rats, Wistar/injuries
4.
Rev. bras. ciênc. vet ; 28(1): 23-29, jan./mar. 2021. il.
Article in Portuguese | LILACS, VETINDEX | ID: biblio-1368354

ABSTRACT

Na procura por material alternativo no tratamento de feridas cutâneas, buscou-se com este estudo avaliar o comportamento da túnica vaginal canina conservada em glicerina a 98% como curativo biológico no tratamento de feridas cutâneas provocadas experimentalmente em ratos. Foram utilizados 16 ratos Wistar, nos quais foram induzidas experimentalmente duas lesões cutâneas na região dorsal, sendo uma cranial e a outra caudal. Uma ferida serviu de controle, a qual não recebeu tratamento, a outra recebeu a túnica vaginal recobrindo toda extensão da lesão. A seleção de qual das feridas, cranial ou caudal, iria receber a membrana foi feita de forma aleatória. Os animais foram distribuídos em quatro grupos de igual número para análises clínicas, macroscópicas e histológicas decorridos três, sete, 14 e 21 dias de pós-operatório. Na avaliação clínica e macroscópica pode-se observar que o processo de reparação teve evolução semelhante tanto no grupo controle quanto no grupo membrana. Na análise histopatológica foi constatada grande quantidade de infiltrado inflamatório nos períodos iniciais, no entanto, decorridos 21 dias, a epiderme já se encontrava reparada, e em todos os momentos foi observada maior presença de tecido conjuntivo no grupo membrana, sugerindo maior precocidade na cicatrização. Deste modo, concluiu-se que a túnica vaginal canina pode ser utilizada como nova alternativa no tratamento de feridas cutâneas.


In the search for alternative material in the treatment of cutaneous wounds, this study aimed to evaluate the behavior of canine vaginal tunic conserved in glycerin 98% as a biological dressing in the treatment of cutaneous wounds provoked experimentally in rats. Sixteen animals were used in which two cutaneous lesions were caused in the dorsal region, one cranial and the other caudal. One wound served as a control which did not receive treatment, the other received the vaginal tunic covering all extension of the lesion. The selection of which of the wounds, cranial or caudal, would receive the membrane was made at random. The animals were divided into four groups of equal numbers for clinical, macroscopic, and histological analyzes after three, seven, 14 and 21 postoperative days. In the clinical and macroscopic evaluation, it can be observed that the healing process had similar evolution in both the control group and the membrane group. In the histopathological analysis, a large amount of inflammatory infiltrate was observed in the initial periods; however, after 21 days the epidermis was already healed, and at all times a greater presence of connective tissue was observed in the membrane group, suggesting a greater precocity in healing. Thus, it was concluded that the canine vaginal tunic can be used as a new alternative in the treatment of cutaneous wounds.


Subject(s)
Animals , Rats , Wound Healing/physiology , Biological Dressings/veterinary , Rats, Wistar/injuries , Wounds and Injuries/therapy , Biocompatible Materials/therapeutic use
5.
Acta cir. bras ; 34(7): e201900705, 2019. graf
Article in English | LILACS | ID: biblio-1038115

ABSTRACT

Abstract Purpose: The denervation of the intestine with benzalkonium chloride (BAC) reduces mortality and improves weight gain in rats with short bowel syndrome (SBS). Nevertheless, translating these promising findings from bench to bedside is not feasible because BAC promotes peritonitis and irreversible denervation which may be followed by an uncontrolled dilatation of the viscera. The use of botulinum toxin (BT) instead of BAC to achieve the denervation of the remaining small intestine in SBS could be an interesting option because it leads to a mild and transient denervation of the intestine. Methods: Here we evaluated the effects of the ileal denervation with BT in rats with SBS by verifying the body weight variation and intestinal morphological parameters. Four groups with 6 animals each were submitted to enterectomy with an ileal injection of saline (group E) or BT (group EBT). Control groups were submitted to simulated surgery with an ileal injection of BT (group BT) or saline (group C - control). Results: We observed that the treatment of the remaining ileum with BT completely reversed the weight loss associated to extensive small bowel resection. Conclusion: This may provide a new promising approach to the surgical treatment of SBS.


Subject(s)
Animals , Rats , Short Bowel Syndrome/surgery , Botulinum Toxins/pharmacology , Denervation/methods , Ileum/innervation , Short Bowel Syndrome/pathology , Benzalkonium Compounds/pharmacology , Body Weight/drug effects , Rats, Wistar , Muscle Weakness/pathology , Disease Models, Animal , Ileum/pathology , Jejunum/innervation
6.
Braz. dent. j ; 28(3): 287-295, May-June 2017. tab, graf
Article in English | LILACS | ID: biblio-888644

ABSTRACT

Abstract Innovative biomaterials can provide a promising new direction for the treatment of bone defects, stimulating a proper repair process, with no damage to adjacent tissues. The purpose of this in vivo study was to evaluate the biocompatibility and the osteoinductive capacity of chitosan-collagen biomembrane and scaffold containing calcium aluminate cement. Eighteen New Zealand white rabbits (Oryctolagus cuniculus) were distributed according to the experimental times of analysis (7, 15 and 30 days). Four bone defects were created in the rabbits calvaria, which were individually filled with the biomembrane, scaffold, blood clot (negative control) and autologous bone (positive control). Histopathological analysis was performed using optical microscope at 32´, 64´, 125´ and 320´ magnifications. Cell response to inflammation and new bone tissue formation was quantified using a score system. The biomembrane group presented greater inflammatory response at 15 days, with significant difference to autologous bone group (p<0.05). There was no statistically significant difference for foreign body type reaction among groups (p>0.05). Concerning new bone formation, linear closure of the defect area was observed more evidently in the group with autologous bone. The scaffold group presented similar results compared with the autologous bone group at 30 days (p>0.05). Both tested biomaterials presented similar biocompatibility compared with the control groups. In addition, the biomembrane and scaffold presented similar osteoinductive capacity, stimulating bone repair process in the course of the experimental time intervals.


Resumo Biomateriais inovadores podem fornecer uma promissora nova direção para o tratamento de defeitos ósseos, estimulando um processo de reparo adequado, sem danos aos tecidos adjacentes. O objetivo deste estudo in vivo foi avaliar a biocompatibilidade e a capacidade osteoindutora de uma biomembrana e um scaffold compostos por colágeno e quitosana, contendo cimento de aluminato de cálcio. Dezoito coelhos (New Zealand White, Oryctolagus cuniculus) foram distribuídos de acordo com os períodos experimentais de análise (7, 15 e 30 dias). Quatro defeitos foram criados na calvaria dos coelhos, que foram individualmente preenchidos com a biomembrana, scaffold, coágulo (controle negativo) e osso autólogo (controle positivo). A avaliação histopatológica foi realizada em microscópio óptico em aumentos de 32´, 64´, 125´ e 320´. A resposta celular à inflamação e à formação de novo tecido ósseo foi quantificada utilizando um sistema de escore. O grupo da biomembrana apresentou maior resposta inflamatória no período de 15 dias, com diferença significativa para o grupo do osso autólogo (p<0,05). Não houve diferença estatística significante para a reação do tipo corpo estranho entre os grupos (p>0,05). Em relação à neoformação óssea, observou-se fechamento linear da área do defeito, que foi mais evidente no grupo em que se utilizou o osso autólogo. O grupo scaffold apresentou resultados semelhantes ao grupo do osso autólogo no período de 30 dias (p>0,05). Ambos os biomateriais testados apresentaram biocompatibilidade similar em comparação com os grupos controle. Além disso, a biomembrana e o scaffold apresentaram capacidade osteoindutora similar, estimulando o reparo ósseo ao longo dos intervalos de tempo experimentais.


Subject(s)
Animals , Rabbits , Biocompatible Materials , Bone and Bones/drug effects , Collagen/chemistry , Calcium Compounds/chemistry , Aluminum Compounds/chemistry , Dental Cements/chemistry , Chitosan/chemistry , Tissue Scaffolds , Membranes, Artificial , Bone and Bones/abnormalities , Bone Development , Foreign-Body Reaction/pathology , Inflammation/pathology
7.
Braz. oral res ; 27(4): 324-330, Jul-Aug/2013. tab, graf
Article in English | LILACS | ID: lil-679211

ABSTRACT

This study evaluated the pH, calcium ion release and antimicrobial activity of EndoBinder (EB), containing different radiopacifiers: bismuth oxide (Bi2O3), zinc oxide (ZnO) or zirconium oxide (ZrO2), in comparison to MTA. For pH and calcium ion release tests, 5 specimens per group (n = 5) were immersed into 10 mL of distilled and deionized water at 37°C. After 2, 4, 12, 24, 48 h; 7, 14 and 28 days, the pH was measured and calcium ion release quantified in an atomic absorption spectrophotometer. For antimicrobial activity, the cements were tested against S. aureus, E. coli, E. faecalis and C. albicans, in triplicate. MTA presented higher values for pH and calcium ion release than the other groups, however, with no statistically significant difference after 28 days (p > 0.05); and the largest inhibition halos for all strains, with no significant difference (E. coli and E. faecalis) for pure EB and EB + Bi2O3 (p > 0.05). EB presented similar performance to that of MTA as regards pH and calcium ion release; however, when ZnO and ZrO2 were used, EB did not present antimicrobial activity against some strains.


Subject(s)
Aluminum Compounds/chemistry , Anti-Infective Agents/chemistry , Calcium Compounds/chemistry , Dental Cements/chemistry , Analysis of Variance , Aluminum Compounds/pharmacology , Anti-Infective Agents/pharmacology , Bismuth/chemistry , Bismuth/pharmacology , Calcium Compounds/pharmacology , Candida albicans/drug effects , Drug Combinations , Dental Cements/pharmacology , Enterococcus faecalis/drug effects , Escherichia coli/drug effects , Hydrogen-Ion Concentration , Materials Testing , Oxides/chemistry , Oxides/pharmacology , Spectrophotometry, Atomic , Silicates/chemistry , Silicates/pharmacology , Staphylococcus aureus/drug effects , Time Factors , Zinc Oxide/chemistry , Zinc Oxide/pharmacology , Zirconium/chemistry , Zirconium/pharmacology
8.
Ciênc. rural ; 39(8): 2454-2457, nov. 2009. tab, ilus
Article in Portuguese | LILACS | ID: lil-529877

ABSTRACT

O objetivo deste trabalho foi estudar a utilização da vídeo-otoscopia como método diagnóstico para otites externas de cães. Para tanto, foram utilizados 20 cães adultos. O grupo A foi formado por 10 animais (cinco machos e cinco fêmeas) provenientes do canil da Universidade Estadual Paulista, Campus de Jaboticabal, sem sinais clínicos aparentes de otite externa, e o grupo B foi formado por 10 animais (cinco machos e cinco fêmeas) encaminhados pelo setor de Clínica Médica do Hospital Veterinário da faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Campus de Jaboticabal, apresentando sinais clínicos de otite. Para realização dos exames, todos os animais foram submetidos ao mesmo protocolo anestésico (acepromazina na dose de 0,1mg kg-1 e tiletamina-zolazepan na dose de 10mg kg-1). Foram diagnosticadas três otites unilaterais e 13 bilaterais, e dentro dos achados estão secreção purulenta; epitélio ulcerado, hiperêmico ou hiperplásico; estenose do meato e alterações da membrana timpânica. A vídeo-otoscopia mostrou ser um método efetivo e um procedimento fundamental no auxílio diagnóstico e prognóstico das desordens auriculares.


The objective of this study was the use of video-otoscopy as a method to diagnose external otitis in dogs. Hence 20 adult dogs were used. The group A was formed by 10 animals (5 males and 5 females) with no apparent symptoms of the external otitis and the group B, formed by 10 animals (5 males and 5 females) sent by the Medical Clinics section of the Veterinary Hospital at the Universidade Estadual Paulista - Câmpus Jaboticabal, with otitis symptoms. All the animals tested have undergone the same anesthesic protocol (acepromazine in a dosis of 0,1mg kg-1 and tiletamine-zolazepan in a dosis of 10mg kg-1). Three unilateral and 13 bi-lateral otitis were diagnosed and the findings include purulent secretion; ulcerated, hyperemic or hyperplasic epithelium; meathus stenosis and alterations in the timpanic membrane. Video-otoscopy has shown to be an effective and a fundamental procedure to help diagnosing and prognosting auricular disorders.

9.
Ciênc. rural ; 35(6): 1351-1356, nov.-dez. 2005. tab
Article in Portuguese | LILACS | ID: lil-417674

ABSTRACT

Avaliaram-se os efeitos da hipovolemia aguda em cães anestesiados pelo isofluorano sobre a eletrocardiografia com a duração e amplitude da onda P (Pms e PmV, respectivamente); intervalo entre as ondas P e R (P-R); duração do complexo QRS (QRS); amplitude da onda R (RmV); intervalo entre as ondas Q e T (Q-T) e intervalo entre as duas ondas (R-R), freqüência cardíaca (FC), índice cardíaco (IC), índice sistólico (IS) e pressões arteriais sistólica (PAS), diastólica (PAD) e média (PAM). Verificou-se também a possível influência do anestésico sobre a resposta compensatória à hipovolemia aguda. Para tal, foram utilizados 20 cães hígidos, sem raça definida, adultos, machos e fêmeas. Induziu-se a anestesia geral com isofluorano por meio de máscara naso-oral a 2,5 CAM e, após a intubação orotraqueal, o vaporizador foi ajustado em 1,5 CAM. Induziu-se a hipovolemia nos animais retirando-se volume total de 35 mlkg-1 de sangue. As mensurações foram realizadas antes da hipovolemia (M0), imediatamente após a retirada do volume total de sangue calculado (M1), e aos dez (M2), trinta (M3) e sessenta (M4) minutos. A avaliação estatística das variáveis foi efetuada por meio de Análise de Variância (ANOVA), seguida pelo teste de Tukey, considerando nível de significância de 5 por cento (P<0,05). Houve redução do tempo de condução elétrica átrio-ventricular, aumento da impedância da musculatura ventricular, redução da freqüência cardíaca, dos índices cardíacos e sistólico, porém sem alteração na despolarização ventricular, sendo que o isofluorano não influenciou no desencadeamento da resposta compensatória à hipovolemia aguda.


Subject(s)
Animals , Dogs , Electrocardiography , Hypovolemia
10.
Acta cir. bras ; 19(4): 311-317, July-Aug. 2004. ilus, graf
Article in Portuguese | LILACS | ID: lil-363440

ABSTRACT

OBJETIVO: Avaliar a biocompatibilidade do cimento de fosfato de cálcio, para verificar sua eficácia como possível substituto ósseo. MÉTODOS: No presente trabalho, foi utilizado cimento de fosfato de cálcio em rádio de 8 coelhos, separados em dois grupos (GI e GII), referentes aos tempos de observação de 12 e 26 semanas pós-operatórias, a fim de se observar as reações entre este biomaterial e o tecido ósseo do animal. Foram feitas análises radiográficas e de densitometria óptica, além de microscopia óptica e eletrônica de varredura. RESULTADOS: Observou-se, ao final do experimento, que o cimento à base de fosfato de cálcio foi parcialmente reabsorvido durante o tempo de observação de 26 semanas, apresentando biocompatibilidade, com ausência de reações indesejáveis que pudessem ser atribuídas aos implantes. CONCLUSÕES: O cimento à base de fosfato de cálcio foi biocompatível e parcialmente reabsorvido no período de 26 semanas de observação. Tempos maiores de observação são necessários para a avaliação da reabsorção.


Subject(s)
Animals , Male , Female , Rabbits , Bone Cements , Calcium Phosphates , Biocompatible Materials/therapeutic use , Prostheses and Implants , Radius/surgery , Calcification, Physiologic , Densitometry
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