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Acta cir. bras. ; 35(10): e202001007, 2020. ilus, tab
Artigo em Inglês | VETINDEX | ID: vti-30299


Purpose: Previous studies have questioned whether the triceps brachii muscle tendon (TBMT) has a double or single insertion on the ulna. Aiming to provide an answer, we describe the anatomy of the TBMT and review a magnetic resonance imaging (MRI) series of the elbow. Methods: Forty-one elbows were dissected to assess the details of the triceps brachii insertion. Elbow plastination slices were analyzed to determine whether there was a space on the TBMT. Magnetic resonance imaging from the records of the authors were also obtained to demonstrate the appearance of the pre-tricipital space on MRI. Results: A virtual space on the medial aspect near the TBTM insertion site in the olecranon was consistently found on anatomic dissections. It was a distal pre-tricipital space. Magnetic resonance imaging demonstrated the appearance of the pre-tricipital space on MRI, and its extension was measured longitudinally either in elbow flexion or extension. There was no statistically significant difference between the measurements of this space in the right and left elbows or between flexion and extension (p > 0.05). The coefficient of variation was 10% for all measurements. Conclusion: Knowledge of this structure may be essential to avoid incorrect diagnosis and unnecessary therapeutic interventions.(AU)

Tendões/anatomia & histologia , Imageamento por Ressonância Magnética , Músculos
Acta cir. bras. ; 34(6): e201900610, Sept. 19, 2019. graf, ilus
Artigo em Inglês | VETINDEX | ID: vti-23300


Purpose: To identify whether the colon mucosa is affected by ten days of gastric restriction in an animal model. Methods: An experimental model of gastric restriction was devised using rats. The animals were submitted to surgical gastrostomy, and a cylindrical loofah was inserted into the stomach. We studied 30 adult male Wistar rats divided into three groups: the stomach restriction group (R10); the sham group (S10), which underwent the same procedure except for the loofah insertion; and the control group (C10). The expression of neutral and acid mucins was evaluated using histochemical techniques. Goblet cells and protein content were compared between groups using generalized estimation equations (GEEs). Bonferronis multiple comparison was applied to identify differences between the groups. All tests considered a 5% significance level. Results: There was an increased expression of neutral mucins, acid mucins and goblet cells in the R10 group. Collagen was also enhanced in the R10 group. Conclusion: The colon mucosa is affected by ten days of gastric restriction in an animal model, increasing neutral mucins, acid mucins and collagen content with trophic maintenance.(AU)

Animais , Ratos , Mucosa Intestinal/anatomia & histologia , Colo/anatomia & histologia , Cirurgia Bariátrica , Mucinas Gástricas/análise , Modelos Animais , Ratos Wistar/anatomia & histologia , Ratos Wistar/cirurgia
Acta cir. bras. ; 30(9): 639-645, Sep. 2015. tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-334064


To investigate the effect of Botulinum toxin A (BoNTA) on skin flap viability in healthy, tobacco-exposed and diabetic rats. Ninety male Wistar rats (250-300g) were randomly divided into six groups: control+saline (C1), control+BoNTA (C2), tobacco-exposed+saline (T1), tobacco-exposed+BoNTA (T2) diabetes+saline (D1) and diabetes+BoNTA (D2). A dorsal cutaneous flap (3×10cm) was performed. Survival area and total area of the flaps were measured. Lumen diameter, external arterial diameter and lumen/wall thickness ratio were recorded. Survival area increased in control group with BoNTA injection compared with control animals injected with saline (C2 x C1; 0.9±0.1 vs0.67±0.15, p= 0.001). A similar result was found in diabetes group injected with BontA (D2 x D1; 0.97±0.2 vs0.61±0.24, p=0.018). No difference was observed in skin flap viability in tobacco-exposed groups (T2 x T1; 0.74±0.24 vs 0.64±0.21, p=0.871). Lumen diameter (p= 0.004), external arterial diameter (p = 0.0046,) and lumen/wall thickness ratio (p= 0.003) were increased in diabetes+BoNTA-treated animals. This effect was not observed in control or in tobacco-exposed groups. Botulinum toxin A increased skin flap viability in control and diabetic rats on the seventh post-operative day. Increased lumen diameter, external arterial diameter, and lumen/wall thickness ratio were observed in the diabetes+BoNTA group. BoNTA had no effect in the tobacco-exposed group on the seventh postoperative day.(AU)

Humanos , Animais , Masculino , Toxinas Botulínicas Tipo A/farmacologia , Diabetes Mellitus Experimental/complicações , Fármacos Neuromusculares/farmacologia , Pele , Retalhos Cirúrgicos , Poluição por Fumaça de Tabaco/efeitos adversos , Sobrevivência de Enxerto , Necrose , Distribuição Aleatória , Ratos Wistar , Reprodutibilidade dos Testes , Pele/patologia , Estreptozocina , Retalhos Cirúrgicos/patologia , Fatores de Tempo
Acta cir. bras. ; 29(3): 166-170, 03/2014. tab, graf
Artigo em Inglês | VETINDEX | ID: vti-10212


To describe a new experimental flap for studying skin viability in rats. METHODS: Twenty male Wistar rats weighing between 250-300g were divided into two groups: group A - McFarlane technique, a 4 x 10cm flap was used (McFarlane); and in group B modified McFarlane technique, a 3 x 10cm flap was used. Seven days later, the animals were sacrificed and the area of necrosis was evaluated in both groups. RESULTS: Group A presented necrosis in 3% of the total area of the flap (CI: 0.01-0.05), Group B presented necrosis in 37% of the total area of the flap (CI: 0.29-0.46), (p<0.001). CONCLUSION: The modified McFarlane flap presented a larger area of necrosis and could be an adequate experimental model of skin flap viability.(AU)

Animais , Pele/anatomia & histologia , Retalhos Cirúrgicos , Necrose/patologia , Ratos/classificação
Acta cir. bras. ; 29(7): 417-422, 07/2014. ilus, graf
Artigo em Inglês | VETINDEX | ID: vti-12370


PURPOSE: To describe an effective experimental model to study the Achilles tendon healing. METHODS: Forty male Rattus norvegicus albinus, Wistar lineage adult male weighing 250 to 300g were used for this experiment and thirty were surgically submitted to bilateral partial transverse section of the Achilles tendon. The right tendon was treated with radio waves (RF) whereas the left tendon served as control. On the third postoperative day, the rats were divided into four experimental groups consisting of ten rats each which were treated with monopolar RF adjusted to 650 kHz and 2w, for two minutes twice a week and a group of normal animals without any intervention, until they were sacrificed on the 7th, 14th and 28th days, respectively. Tendons were weighed and collagen quantification was evaluated by hydroxyprolin content. RESULTS: Significant reduction in collagen content on day 7, 14 and 28 was related to control experiment to normal tendon (7 days, p<0.01; 14 e 28 days, p<0.05). CONCLUSION: The experimental model has been effective and available to be used to study Achilles tendon healing.(AU)

Humanos , Animais , Ratos , Tendão do Calcâneo/cirurgia , Hidroxiprolina , Colágeno Tipo I , Pró-Colágeno , Hidroxiprolina/análise , Modelos Animais , Ratos Wistar