MARCELO ROSA DE REZENDE
Projetos de Pesquisa
Unidades Organizacionais
Instituto de Ortopedia e Traumatologia, Hospital das Clínicas, Faculdade de Medicina - Médico
LIM/41 - Laboratório de Investigação Médica do Sistema Músculoesquelético, Hospital das Clínicas, Faculdade de Medicina
LIM/41 - Laboratório de Investigação Médica do Sistema Músculoesquelético, Hospital das Clínicas, Faculdade de Medicina
3 resultados
Resultados de Busca
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- GRACILIS MUSCLE TRANSFER TO ELBOW FLEXION IN BRACHIAL PLEXUS INJURIES(2020) SILVA, Gustavo Bersani; LIMA NETO, Mauricio Rodrigues; CHO, Alvaro Baik; IAMAGUCHI, Raquel Bernardelli; RESENDE, Marcelo Rosa de; WEI, Teng HsiangObjective: Brachial plexus injury can lead to significant functional deficit for the patient. Elbow flexion restoration is a priority in surgical treatment. Free functional muscle transfer is an option for early or late treatment failure. This study evaluated patient characteristics and elbow flexion muscle strength after gracilis functioning muscle transfer. Methods: Medical records of 95 patients operated from 2003 to 2019 were analyzed and the following variables recorded: age, gender, nerve transfer used to motorize the gracilis muscle, time between trauma and surgery, age at surgery and elbow flexion strength after a minimum of 12 months following functioning muscle transfer. Results: 87 patients were included, averaging 30 years of age (17 to 57 years). Fifty-five achieved elbow flexion muscle strength >= M3 (55/87, 65%), with a mean follow-up of 37 months. The nerves used for activation of the transferred gracilis were: 45 spinal accessory, 10 intercostal, 8 median n. fascicles, 22 ulnar n. fascicles and 2 phrenic nerves. Conclusion: Functional muscle transfer is a viable surgical procedure for elbow flexion in chronic traumatic brachial plexus injuries in adults.
- THE DESIGN OF THE ARTERIOVENOUS VASCULAR LOOP DOES NOT AFFECT ITS PATENCY: EXPERIMENTAL STUDY(2020) SAITO, Mateus; REZENDE, Marcelo Rosa de; SANTOS, Gustavo Bispo dos; BITTENCOURT, Thiago; NUNES, Maria do Carmo; MATTAR JUNIOR, RamesObjective: To evaluate the effect of the design of a femoral vascular loop with anastomosis in the femoral artery of rabbits on the presence of flow (patency) after seven days. Methods: A total of 39 rabbits underwent arteriovenous microanastomosis using the microsurgical technique. Two loop designs were used: one circular and the other angled. The parameters evaluated were presence or absence of flow, signs of hemolysis and hemodynamic changes. Results: After seven days, flow was present in 68% of the angled loops and 75% of the circular loops (p > 0.05). There was a significant intragroup decrease in pCO(2) and a significant increase in pH. For the other parameters evaluated, no significant differences between the two loop models were found. Conclusions: A reproducible vascular loop model was shown. There was no significant difference between the two vascular loop models about the presence of flow after seven days.
- RANDOMIZED CONTROLLED TRIAL OF LIMITED FASCIOTOMY WITH INJECTION OF ADIPOSE GRAFT FOR DUPUYTREN'S DISEASE(2020) SAMBUY, Marina Tommasini C.; NAKAMOTO, Hugo A.; BOLLIGER NETO, Raul; JR, Rames Mattar; REZENDE, Marcelo R.; WEI, Teng HsiangObjective: Dupuytren's disease is a genetic disorder related to the proliferation of myofibroblasts. The pluripotent property of stem cells present in adipose tissue inhibits myofibroblast proliferation. Our study sought to evaluate the effect of stem cell-rich fat grafts in patients that underwent limited fasciotomy. Methods: We studied 45 patients, in a single-blind, prospective, randomized clinical trial. All patients underwent limited fasciotomy. In one group, fat graft was injected. Results: The total passive extension deficit results did not exhibit a significant difference. Fat group exhibited worse functional score at 6 months and 1 year postoperatively, such as higher complication rates (43%), when compared with control group (8%), and more pain at 6 weeks follow-up. Conclusion: Fat grafting associated with limited fasciotomy promotes worse functional results compared to conventional limited fasciotomy in the short term. However, long-term results and recurrence rates should be further assessed.