Rayan Haquim Pinheiro Santos

Schinus terebinthifolius raddi (anacardiaceae) no processo de cicatrização de gastrorrafias em ratos

BACKGROUND: Gastrorraphy, isolated or associated with the use of biological adhesives, was throughout the history of surgery the usual way to promote healing in gastric lesions and the use of herbal medicine has been increasingly more employed. AIM: To evaluate the wound healing in the stomach of rats with the use of the hydroalcoholic extract of Schinus terebinthifolius Raddi (aroeira). METHODS: Sixty rats, adult males, were divided into two groups: aroeira group and control group. Each one was subdivided into four subgroups of 15 animals (test groups). Each subdivided subgroup was also subdivided into three subgroups of five rats (deaths periods of 7, 14 and 21 days). All animals underwent the same surgical procedure (injury and stomach suture); animals in the aroeira group received daily dose of 100 mg/kg of hydroalcoholic extract via gavage while the control group received isotonic saline solution. Parameters evaluated were: macroscopic and microscopic changes, test for resistance to insufflation of atmospheric air and test for tensile strength. RESULTS: All animals had good healing of the abdominal wall and gastrorraphies without infection and dehiscence. Both groups had adhesions to the gastrorraphies surfaces with neighboring organs. The resistance test by insufflation of atmospheric air and tensile strength showed higher average of pressure on the 7th day and breaking strength in the time periods for the aroeira group. The intensity of chronic inflammation revealed statistically significant differences in the variables fibroblast proliferation and collagen. CONCLUSION: The use of hydroalcoholic extract of Schinus terebinthifolius Raddi accelerated the stomach healing in rats.

Efeito de Schinus terebinthifolius Raddi (aroeira) e Carapa guianensis Aublet (andiroba) na cicatrização de gastrorrafias

BACKGROUND: The gastrorraphy isolated or associated with the use of biological adhesives formed throughout the history of surgery the usual way to promote healing in gastric lesions; however, the use of herbal medicine has been increasingly employed to help the wound healing. AIM: To evaluate the wound healing caused in the stomach of rats using extract of Schinus terebinthifolius Raddi and Carapa guianensis Aublet oil. METHODS: Ninety rats, adult males were divided into three groups: aroeira, andiroba and control group, which were subdivided into three subgroups of five animals according to the time of the deaths (seven, 14 and 21 days). All underwent the same surgical procedure (injury and suture the stomach) differing only to the animals in groups aroeira and andiroba that received a daily dose of 100 mg / kg of hydroalcoholic extract and oil, by gavage, while the control group received normal saline. The parameters evaluated were the macroscopic and microscopic test of resistance to air insufflation and test the traction force. RESULTS: All animals showed good healing of gastric and abdominal wall without infection and dehiscence. Both groups presented neighboring organs adhesions on the gastric surface. The endurance test for air insufflation showed higher average pressure within seven days and the test revealed greater traction force of rupture between seven and 14 days in groups aroeira and andiroba. The intensity of chronic inflammation revealed statistically significant differences in angiogenesis and fibroblast proliferation. CONCLUSION: The use of extract of Schinus terebinthifolius Raddi and Carapa guianensis Aublet oil favored the gastric wound healing in rats.

Use of 2-octyl cyanoacrylate adhesive in rat liver induced lesion

PURPOSE To evaluate the healing process of rat traumatic liver lesion corrected with the use of 2-octyl cyanoacrylate adhesive, compared to the use of biologically absorbable chromed catgut thread suture. METHODS Thirty mail adult rats were divided into two groups (15 per group) according to the used method for liver lesion correction as follows: adhesive group (AG), and catgut group (CG); each group being divided into three subsets of five animals (7th, 14th, and 21st day), respectively, according to post-surgery evaluation. All animals were submitted to homogeneous lesion applying synthetic bonding to AG and using chromed catgut suture to CG for lesion correction. Macroscopic and microscopic parameters of healing processes were evaluated. RESULTS Both groups of animals showed excellent abdominal wall healing, with no evidence of infection, and no abdominal cavity peritonitis or abscess. The presence of adherence was observed in both groups with no statistically significant difference. As to macroscopic evaluation, there was statistically significant difference with respect to specific factors of clinical inflammation (ischemic inflammation and giant celular inflammatory reaction) between animals evaluated on the 10th day (ischemic necrosis and giant cellular inflammatory reaction) among animals evaluated on the 14th day (A14 versus C14). CONCLUSION Applying 2-octyl-cyanoacrylate adhesive for correcting rat liver lesion does not change healing process when compared to the use of chromed catgut stitch.

Cicatrização gástrica com uso do extrato da Euphorbia Tirucalli L.: estudo em ratos

BACKGROUND The use of plants in the prevention and treatment of disease is age-old practice. The aveloz (Euphorbia tirucalli) is a plant native of Africa and has been associated with antimicrobial, antiulcers, anticarcinogenic, antiviral, healing, anti-helminthic, antisiphilitic effects. AIM To analyze the effect of the crude extract of Euphorbia tirucalli L. in the stomach healing process of mice. METHODS Sixteen Swiss mice, adult females were subjected to 1 cm longitudinal incision in the gastric body and sutured with 6-0 polypropylene stitches. After the procedure, the animals were randomly divided into two groups of eight animals. These were redistributed into four subgroups: Aveloz (GA7) and Control (CG7) with programmed death for 7th day postoperatively and Aveloz (GA14) and Control (GC14) with programmed death for 14 days postoperatively. The group GA used 1 ml of hydroalcoholic solution of the crude extract of Euphorbia tirucalli at 30 mg/ml orally by gavage route and the CG, 0.9% saline solution at the same volume and route. After death, the inventory of the abdominal cavity was conducted and the stomach removal was performed, fixing in formalin and sent for microscopic analysis. In the comparative analysis between the two groups were evaluated the macroscopic and microscopic parameters of healing. RESULTS There were no signs of peritonitis, fistulas or hematomas in the animals. There were adhesions of the stomach, especially with the liver and omentum in the animals at 7 and 14 days postoperatively in both groups. The analysis of histological parameters showed no statistically significant difference between groups in any of the parameters evaluated. CONCLUSION The evaluation of the use of the crude extract of Euphorbia tirucalli L. on stomach wound healing in mice showed equivalence in comparison to the control group.

Evaluation of the use of raw extract of Euphorbia tirucalli L. in the healing process of skin wounds in mice

PURPOSE To evaluate the effects of crude extract of Euphorbia tirucalli in cutaneous wound healing. METHODS A total of 20 Swiss mice were randomly divided into two groups, aveloz (GA) and control (CG), and each group was further divided into two subgroups based on the deaths scheduled for the 7th and 14th days after surgery. The animals underwent a resection of cutaneous fragment with 1cm in diameter on the dorsum; the GA was applied in each animal on the subsequent days, 0.1 mL (30 mg/mL) hydroalcoholic extract of Euphorbia tirucalli was applied on the wound, while the same volume of 0.9% saline solution was applied to the GC. It was evaluated the lesion diameter and after programmed death, a surgical specimen was resected for histopathology. RESULTS In the macroscopic analysis, no statistically significant difference was observed (p = 0.120 and p = 0.186, for the 7th and 14th days of death, respectively). The histological evaluation revealed no statistically significant difference in the variables acute inflammation (p = 0.014) and fibrosis (p = 0.018), when compared the group aveloz with the control group on day 14. CONCLUSION The crude hydroalcoholic extract of Euphorbia tirucalli L. demonstrated better outcomes in the healing process, acute inflammation and fibrosis on the 14 day postoperatively.

Encefalocele basal esfenoetmoidal associada a fissura labiopalatina mediana: relato de caso

Association of basal sphenoethmoidal encephalocele with midline cleft lip and palate is extremely rare. The authors report the case of a nine-year-old girl presenting a midline facial cleft with meningocele that was noticeable through the palatine defect as a medial intranasal pulsatile mass. An analysis of clinical and radiological findings of the present case of cranial dysraphism is carried out.

Use of raw Euphorbia tirucalli extract for inhibition of ascitic Ehrlich tumor

OBJECTIVE to evaluate the effect of the Euphorbia tirucalli hydroalcoholic extract (ETHE) on the development of Ehrlich Tumor, in its ascitic form. METHODS we intraperitoneally inoculated 15 Swiss mice with 10.44 x 107 cells of Ehrlich Tumor and divided them in two groups one day after: ETHE Group (eight mice), treated with a dosage of 125 mg/kg/day of EHTE for five days; and Control Group (seven mice), treated only with 0.9% isotonic saline solution over the same period. The treatment was done by gavage. Ten days after inoculation, four mice from each group were sacrificed for quantification of tumor cell number, ascitic fluid volume and bone marrow cell number. The remaining animals were maintained to evaluate survival. RESULTS The ascitic fluid volume and the tumor cell number were decreased in the ETHE group when compared with the control group, but with no statistical significance. On the other hand, survival was higher in the ETHE group, as well as the number of bone marrow cells. CONCLUSION Treatment with ETHE after inoculation of Ehrlich Tumor decreases its development and increases survival and the bone marrow cellularity, thus reducing the myelosuppression present in the Ehrlich Tumor bearing mice.

Analysis of the healing process of the wounds occurring in rats using lasertherapy in association with hydrocolloid

PURPOSE To evaluate wound healing in rats by using low-level laser therapy (LLLT) associated with hydrocolloid occlusive dressing. METHODS Forty male, adult, Wistar rats were used, distributed into four groups: LG (received 2 J/cm² of laser therapy); HG (treated with hydrocolloid); LHG (treated with 2 J/cm² of laser therapy and hydrocolloid); and the CG (treated with 1 mL of 0.9% saline). The wound was evaluated at pre-determined periods 3rd and 7th days, considering the macroscopic and histological parameters (inflammatory cells, capillary neoformation, fibroblasts, collagen formation and reepithelialization). RESULTS The LG group at seven days showed increased collagen formation, the LHG group at 3 days showed mild collagen formation. The HG group and the CG at 7 days showed complete reepithelialization. CONCLUSION Low-level laser therapy as well as the hydrocolloid dressing have favored the wound-healing process in rats.

Effects of oxygen in lungs of rats

PURPOSE To analyze microscopically the effects of different concentrations of oxygen in the lungs of rats. METHODS There were 20 rats distributed in three experimental groups (concentration of oxygen to 40%, 70% and 100%) and a control group. The animals were exposed to the oxygen in a chamber of acrylic during three days and after exposition, the animals were submitted to median thoracotomia to remove the lungs. The lung tissue of all of the animals was analyzed as regards presence of acute and chronic inflammation, capillary congestion, alveolar walls thick, interstitial and alveolar edema, alveolar hemorrhage, denudation capillary and alveolar endothelium areas and atelectasis. RESULTS The analysis histopathologic revealed significant statistics difference for acute and chronic inflammation, capillary congestion, alveolar walls thick, interstitial and alveolar edema, alveolar hemorrhage, denudation capillary and alveolar epithelium areas. CONCLUSIONS Exposition to the oxygen during 72 hours in the concentration of 40% does not produce significant histopathologic alterations in the lung tissue; in the concentration of 70%, can promotes the alveolar walls thick and capillary congestion and in the concentration of 100% can cause death and originate diffuse pulmonary lesion.

Chiari I malformation with neurogenic hypertension: case report

Chiari I malformation presents with pain, headache, dizziness, loss of thermal sensitivity, and changes in strength in the limbs. This occurs due to the involvement of the anatomical structures underlying the occipitocervical junction such as the lower cranial nerves, cerebellum, and major ascending and descending pathways. There is a lack of studies that investigate the association between neurogenic hypertension and Chiari I malformation [1]. The studies that exist have shown the connection between hypertension and vascular compression of neural structures at the brainstem, particularly the rostral ventrolateral medulla oblongata. This association suggests that other compressions of the medulla oblongata can present with elevated blood pressure by a similar mechanism [2, 3]. We report a case of a patient with chronic arterial hypertension without classic signs of Chiari with resolution after decompressive surgery. It seems to be the first case reported in Brazil.