EDNA FRASSON DE SOUZA MONTERO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Cirurgia, Faculdade de Medicina - Docente
LIM/08 - Laboratório de Anestesiologia, Hospital das Clínicas, Faculdade de Medicina - Líder
LIM/08 - Laboratório de Anestesiologia, Hospital das Clínicas, Faculdade de Medicina - Líder
2 resultados
Resultados de Busca
Agora exibindo 1 - 2 de 2
- Continuous peritoneal lavage with vacuum perito-neostomy: an experimental study(2019) RODRIGUES, Adilson Costa; SAAD, Karen Ruggeri; SAAD, Paulo Fernandes; OTSUKI, Denise Aya; SANTOS, Luana Carla dos; RASSLAN, Samir; MONTERO, Edna Frasson de Souza; UTIYAMA, Edivaldo M.OBJECTIVE: Despite advances in diffuse peritonitis treatment protocols, some cases develop unfavorably. With the advent of vacuum therapy, the use of laparostomy to treat peritonitis has gained traction. Another treatment modality is continuous peritoneal lavage. However, maintaining this technique is difficult and has been associated with controversial results. We propose a new model of continuous peritoneal lavage that takes advantage of the features and benefits of vacuum laparostomy. METHOD: Pigs (Landrace and Large White) under general anesthesia were submitted to laparostomy through which a multiperforated tube was placed along each flank and exteriorized in the left and lower right quadrants. A vacuum dressing was applied, and intermittent negative pressure was maintained. Peritoneal dialysis solution (PDS) was then infused through the tubes for 36 hours. The stability of peritoneostomy with intermittent infusion of fluids, the system resistance to obstruction and leakage, water balance, hemodynamic and biochemical parameters were evaluated. Fluid disposition in the abdominal cavity was analyzed through CT. RESULTS: Even when negative pressure was not applied, the dressing maintained the integrity of the system, and there were no leaks or blockage of the catheters during the procedure. The aspirated volume by vacuum laparostomy was similar to the infused volume (9073.5 +/- 1496.35 mL versus 10165 +/- 235.73 mL, p=0.25), and there were no major changes in hemodynamic or biochemical analysis. According to CT images, 60 ml/kg PDS was sufficient to occupy all intra-abdominal spaces. CONCLUSION: Continuous peritoneal lavage with negative pressure proved to be technically possible and may be an option in the treatment of diffuse peritonitis.
- Hypertonic saline and pentoxifylline enhance survival, reducing apoptosis and oxidative stress in a rat model of strangulated closed loop small bowel obstruction(2019) SCAPINI, Gustavo; RASSLAN, Roberto; CAYUELA, Natalie Chaves; GOES, Miguel Angelo; KOIKE, Marcia Kiyomi; UTIYAMA, Edivaldo Massazo; MONTERO, Edna Frasson de Souza; RASSLAN, SamirOBJECTIVES: Intestinal obstruction has a high mortality rate when therapeutic treatment is delayed. Resuscitation in intestinal obstruction requires a large volume of fluid, and fluid combinations have been studied. Therefore, we evaluated the effects of hypertonic saline solution (HS) with pentoxifylline (PTX) on apoptosis, oxidative stress and survival rate. METHODS: Wistar rats were subjected to intestinal obstruction and ischemia through a closed loop ligation of the terminal ileum and its vessels. After 24 hours, the necrotic bowel segment was resected, and the animals were randomized into four groups according to the following resuscitation strategies: Ringer's lactate solution (RL) (RL-32 ml/kg); RL+ PTX (25mg/kg); HS+ PTX (HS, 7.5%, 4 ml/kg), and no resuscitation (IO-intestinal obstruction and ischemia). Euthanasia was performed 3 hours after resuscitation to obtain kidney and intestine samples. A malondialdehyde (MDA) assay was performed to evaluate oxidative stress, and histochemical analyses (terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling [TUNEL], Bcl-2 and Bax) were conducted to evaluate kidney apoptosis. Survival was analyzed with another series of animals that were observed for 15 days. RESULTS: PTX in combination with RL or HS reduced the MDA levels (nmol/mg of protein), as follows: kidney IO=0.42; RL=0.49; RL+ PTX=0.31; HS+ PTX=0.34 (p<0.05); intestine: IO=0.42; RL=0.48; RL+ PTX=0.29; HS + PTX=0.26 (p<0.05). The number of labeled cells for TUNEL and Bax was lower in the HS+ PTX group than in the other groups (p<0.05). The Bax/Bcl-2 ratio was lower in the HS+ PTX group than in the other groups (p<0.05). The survival rate on the 15 th day was higher in the HS+ PTX group (77%) than in the RL+ PTX group (11%). CONCLUSION: PTX in combination with HS enhanced survival and attenuated oxidative stress and apoptosis. However, when combined with RL, PTX did not reduce apoptosis or mortality.