MARIA CRISTINA CHAVANTES
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- Is it possible to prevent morbidity on post cardiovascular surgery applying low level laser therapy?(2014) PINTO, Nathali Cordeiro; BAPTISTA, Ivany Machado de Carvalho; PEREIRA, Mara Helena Corso; SERRAO JUNIOR, Nelson Francisco; POMERANTZEFF, Pablo M. A.; CHAVANTES, Maria CristinaBackground and Objective: Complications following cardiovascular surgery incision are common in mediastinitis and wound dehiscence form, a 47% mortality rate remaining. Low Level Laser Therapy (LLLT) has been employed mainly to its effectiveness analgesic and anti-inflammatory actions, aiding the tissue repair process. The aim of this study was to evaluate infrared LLLT onto surgical incision in patients submitted to cardiovascular surgery. Materials and Methods: 40 patients were divided in two groups: Placebo Group (G1) - conventional therapy + ""Laser pointer"" and Laser Group (G2) - conventional therapy + Infrared Laser irradiation on surgical incision. Diode Laser was employed, C. W. mode, around the surgical wound bed, on immediate Post Operative (PO), 1st PO and 3rd PO with the following parameters: wavelength (lambda): 830nm, P=35mW, E=0,75J. Results: G2 didn't present any complication and 5% of patients in G1 developed incision dehiscence and infection. On 7thPO, still a large amount of G1 patients showed pain and unquestionable inflammatory signs surrounding the surgical wound, when compared to G2. Besides, hospital stay in Laser Group was 2 times shorter than in Placebo Group (p-value=0.001). Conclusion: Infrared Laser denoted to be safe and exceptionally valuable tools in preventing morbidities on post cardiovascular surgeries.
conferenceObject LASER THERAPY: AN ADJUVANT TREATMENT IN ACUTE AND CHRONIC WOUNDS REPAIRING(2013) BAPTISTA, Ivany; CHAVANTES, Maria Cristina; PINTO, Nathali; MONETTA, LinaconferenceObject LOW LEVEL LASER THERAPY IMPROVES CARDIOVASCULAR AUTONOMIC ACTIVITY IN SPONTANEOUSLY HYPERTENSIVE RATS(2015) SILVA, Bianca; TOMIMURA, Suely; SANCHES, Iris; CANAL, Marina; PINTO, Nathali; MADI, Otavio; CONTI, Felipe; ANGELIS, Katia De; COLOMBO, Fernanda; CHAVANTES, M. CristinaconferenceObject LOWLEVEL LASER THERAPY CAN IMPROVE THE THYROID VASCULARIZATION IN PATIENTS WITH CHRONIC AUTOIMMUNE THROIDITIS(2012) HOEFLING, Danilo; CHAVANTES, Maria Cristina; JULIANO, Adriana; CERRI, Giovanni; KNOBEL, Meyer; YOSHIMURA, Elisabeth; CHAMMAS, Maria CristinaBackground: Chronic autoimmune thyroiditis (CAT) frequently alters thyroid vascularization, likely as a result of the autoimmune process. Therefore, the objective of this study was to evaluate the effects of low-level laser therapy (LLLT) on the thyroid vascularization of patients with hypothyroidism induced by CAT using color Doppler ultrasound parameters. Study: A randomized clinical trial was conducted from 2006 to 2009 at the Hospital das Clínicas, University of Sao Paulo Medical School. Forty-three patients who underwent levothyroxine replacement for CAT-induced hypothyroidism were randomly assigned to receive either 10 sessions of LLLT (L group, n=23) or 10 sessions of a placebo treatment (P group, n=20). Color Doppler ultrasounds were performed before and 30 days after the end of the interventions. All of the patients in both groups continued taking their previous levothyroxine doses for the duration of the study. To verify the vascularization of the thyroid parenchyma, power Doppler was performed. The systolic peak velocity (SPV) and resistance index (RI) in the superior and inferior thyroid arteries were measured by pulsed Doppler. Results: All of the patients completed the study. The frequency of normal vascularization of the thyroid lobes observed in the post-intervention power Doppler examination was significantly higher in the L than in the P group (P=0.023). The pulsed Doppler examination revealed an increase in the SPV of the inferior thyroid arteries in the L group compared with the P group (P=0.016), whereas no significant difference in the SPV of the superior thyroid arteries was found between the groups. There was also no significant difference in the RI between the groups. Conclusion: These results suggest that LLLT can ameliorate thyroid parenchyma vascularization and increase the SPV of the inferior thyroid arteries of patients with hypothyroidism caused by CAT.conferenceObject ANALYSIS OF OPTICAL DOSIMETRY IN RAT-TAIL MAY CORROBORATE TRANSCUTANEOUS LOW-LEVEL LASER THERAPY IN BLOOD RESPONSE(2013) SOUSA, Marcelo; PINTO, Nathali; YOSHIMURA, Elisabeth; CANAL, Marina; NAKATA, Leticia; PEREIRA, Mara; MARTINS, Luis; CHAVANTES, Maria Cristina- Post-operative uses of low-level laser therapy(2016) CHAVANTES, M. C.; PINTO, N. C.; HOLANDA, V. M.In our surgical experience, the use of low-level laser therapy (LLLT) can decrease complications in several major surgeries such as neurosurgery, major abdominal surgery (bariatric surgery), breast reconstruction (TRAM flap) surgical procedures, major burn surgery, and thoracic-cardiovascular surgery. LLLT can accelerate tissue repair, facilitating cicatrization and providing an analgesic effect in post-surgical pain. LLLT can also prevent morbidity, avoiding undesirable outcomes that could be evolving to post-operative death [1]. Although no single tool or technique is yet available to address the many complex issues surgeons face in their everyday practice, this remarkable devicemay be highly beneficial for patients by mitigating their suffering and quite rewarding for doctors. © 2017 Pan Stanford Publishing Pte. Ltd.
conferenceObject LONG-TERM FOLLOW-UP OF PATIENTS WITH HYPOTHYROIDISM INDUCED BY AUTOIMMUNE THYROIDITIS SUBMITTED TO LOW-LEVEL LASER THERAPY(2017) HOFLING, Danilo; CHAVANTES, M. Cristina; BUCHPIGUEL, Carlos Alberto; CERRI, Giovanni Guido; CARNEIRO, Paulo Campos; MARUI, Suemi; CHAMMAS, Maria CristinaconferenceObject HEMODYNAMIC CHANGES POST LOW LEVEL LASER THERAPY IN ELDERLY OBESE RATS: AN EXPERIMENTAL STUDY(2013) CANAL, Marina; CONTI, Filipe; PINTO, Nathali; PINTO, Michael; SILVA, Bianca; SANCHES, Iris; DUARTE, Ivone; ANGELIS, Katia De; CONSOLIM-COLOMBO, Fernanda; CHAVANTES, Maria CristinaconferenceObject LOW LEVEL LASER THERAPY'S EFFECT RELATING TO THE ELECTROMYOGRAPHIC ACTIVITY AND THE POSTURE IN THE TEMPOROMANDIBULARS DISORDERS: PILOT STUDY(2012) SERRAO, Nelson; MARTINICHEN, Marcia; MAGNANI, Rina; PINTO, Nathali; CHAVANTES, Maria Cristina- The use of a high-power laser on swine mitral valve chordae tendineae(2016) PINTO, Nathali Cordeiro; CHAVANTES, M. Cristina; ZEZELL, Denise; DEANA, Alessandro; BENETTI, Carolina; MARCOS, Rodrigo Labat; LOPES, Luciana Almeida; MARTINS, Rodrigo A. B. Lopes; AIELLO, Vera Demarchi; JATENE, Fabio Biscegli; POMERANTZEFF, Pablo M. A.Worldwide, rheumatic fever remains a significant cause of mitral valve insufficiency. It is responsible for approximately 90 % of early childhood valvular surgeries in Brazil. Elongated or flail chordae are frequently responsible and require surgical correction. The purpose of this study was to analyze and compare the histological tissues of the mitral valve chordae and the mechanical resistance generated by the chordae, both with and without the application of a high-power laser. Twenty normal porcine mitral valve chordae were measured and divided randomly into the following two groups: control group (not subjected to a high-power laser) and laser group (subjected to photonic irradiation). Laser surgery was performed under controlled conditions, using following parameters: lambda = 980-nm wavelength, power = 3 W, and energy = 60 J. A mechanical test machine was used in combination with a subsequent histological study to measure chordae tensile properties. A histological analysis demonstrated a typical collagen bundle arrangement in the control group; however, under a particular reached temperature range (48), the collagen bundles assumed different arrangements in the laser group. Significant reductions in the chordae tendineae lengths and changes in their resistance in the laser group were observed, as these chordae exhibited less rigid fibers. The chordae tendineae of normal porcine valves subjected to a high-power laser exhibited its length reduction and less stiffness compared to the control group. A histological analysis of the laser treatment specimens demonstrated differences in collagen bundle spatial organization, following slight changes into tissue temperature.