Figueiredo JCA et al. Influence of sildenafil and buflomedil on survival of randomized flaps in rats: an experimental study Influência do buflomedil e do sildenafil na sobrevivência de retalhos randomizados em ratos: estudo experimental ABSTRACT Background: Microcirculation dysfunction, as a consequence of localized vascular insufficiency, is considered to be one of the dominant causes of surgical flap necrosis. Several vasoactive drugs have been tested for the pharmacological treatment of tissue ischemia, with varying degrees of success. This study aimed to assess the impact of buflomedil and sildenafil on the viability of random skin flaps in rats. Methods: Caudally pedicled skin flaps (10 x 3 cm) were created on the backs of rats. The animals were randomly assigned, in groups of 10, to three treatment groups: one group served as the vehicle control group, one group received buflomedil (10 mg/kg/d, orally), and a third group received the same dosage of sildenafil. Following seven days of dosing, the animals were sacrificed, and the viable flap area was determined. Results: The average viable flap area for each group was: 16.2 + 3.56 cm² (control group), 17.69 + 2.54 cm² (buflomedil group), and 18.28 + 3.74 cm² (sildenafil group). Data analysis by the Kruskal-Wallis test failed to show a statistically significant difference between the three groups. Conclusions: Neither buflomedil nor sildenafil showed a reduction in the necrotic area of random skin flaps in rats.
Introduction: Some techniques for total reconstruction of the breast, regardless of complexity, present specific complications, with varying degrees of morbidity. Therefore, the aim of this study was to identify the most frequent complications of the main techniques used for breast reconstruction, and to compare these complications to the relevant independent variables. Methods: This cross-sectional observational study was conducted by reviewing the medical records of patients who had their breasts completely rebuilt after a mastectomy due to breast cancer from January 2007 to December 2009, with a minimum postoperative follow-up of 3 years. The data collected, such as the timing of the intervention, reconstruction techniques, operative time, and adjuvant treatment, were statistically related to the presence of complications. Results: Of the 48 total breast reconstructions analyzed, the technique in which expanders were used followed by replacement with implants showed the lowest prevalence of complications (16.7%, P < 0.000). Some techniques showed specific complications. The operative time for transplantation of transverse rectus abdominis musculocutaneous flap (363.57 ± 59.91 min) was significantly higher than that required for techniques using alloplastic materials (155.71 ± 38.02 min, P = 0.01), but similar to that for the latissimus dorsi flap (309.69 ± 77.66 min). The operative time, timing of surgical intervention, and type of adjuvant treatment did not correlate with the incidence of complications. Conclusions: Each technique has its indications, contraindications, and complications. The application of each technique should be individualized on the basis of the individual characteristics of the patient to obtain better results, avoiding short-and long-term complications.
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