Browsing by Author "Vial, Gustavo"
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Item Cierre de bolsillo subpectoral para la reconstrucción mamaria: descripción de una nueva técnica quirúrgica mediante el uso de celulosa oxidada regenerada NU-KNIT(Sociedad de Cirujanos de Chile, 2017) Gantz, Jose; Villalón, Javier; Salazar, Victor; Cadiz, Fernando; Pradenas, Sebastian; Romagnoli, Militza; Allamand, Juan; Vial, Gustavo; Santos, Maria; Fuster, Felipe; Fischer, Diego; Castillo, Martin; Rivera, MatiasIntroduction: The use of breast expander, prior to the final prosthetic reconstruction, is not exempt from complications. They not only relate to the presence of peri-operative radiation therapy, or patient-related issues; but also related to the muscle integrate coverage of the breast expander. Material and methods: Retrospective review of patients undergoing deferred breast reconstruction using a modification of the technique of sub muscular pocket closing with oxidized regenerated cellulose NU-KNITTM for the breast expander. Between January 1, 2014 and December 31, 2015 one plastic surgeon (J.V.), from the Breast Pathology Unit at Clínica Alemana de Santiago, performed reconstruction surgeries with this technique in 31 patients. In the present article, the technique modification, demographic data, histological data and the complications which arose during the expansion phase of the same, will be described. Results: 40 breast reconstructions were performed in 31 patients. 11 seromas (27.5% of total expanders), 2 sufferings of skin flap wound dehiscence (5% expanders) and 1 wound infection (2.5% of expanders) were presented. Two patients required surgical debridement due to surgical dehiscence and infection. One patient required explantation of the expander (2.5% of total expanders). Discussion: The modification of the surgical technique represents a safe and reproducible alternative to achieve a complete closure of the muscular pocket and thus a complete coverage of the expander, consequently; avoiding some of the secondary complications drawn from an insufficient coverage of the expander.Item Cierre de bolsillo subpectoral para la reconstrucción mamaria: descripción de una nueva técnica quirúrgica mediante el uso de celulosa oxidada regenerada NU-KNIT®(Sociedad de Cirujanos de Chile, 2017) Gantz, José; Villalón, Javier; Salazar, Víctor; Cadiz, Fernando; Pradenas, Sebastián; Romagnoli, Militza; Allamand, Juan; Vial, Gustavo; Santos, María; Fuster, Felipe; Fischer, Diego; Castillo, Martin; Rivera, MatiasIntroduction: The use of breast expander, prior to the final prosthetic reconstruction, is not exempt from complications. They not only relate to the presence of peri-operative radiation therapy, or patient-related issues; but also related to the muscle integrate coverage of the breast expander. Material and methods: Retrospective review of patients undergoing deferred breast reconstruction using a modification of the technique of sub muscular pocket closing with oxidized regenerated cellulose NU-KNITTM for the breast expander. Between January 1, 2014 and December 31, 2015 one plastic surgeon (J.V.), from the Breast Pathology Unit at Clínica Alemana de Santiago, performed reconstruction surgeries with this technique in 31 patients. In the present article, the technique modification, demographic data, histological data and the complications which arose during the expansion phase of the same, will be described. Results: 40 breast reconstructions were performed in 31 patients. 11 seromas (27.5% of total expanders), 2 sufferings of skin flap wound dehiscence (5% expanders) and 1 wound infection (2.5% of expanders) were presented. Two patients required surgical debridement due to surgical dehiscence and infection. One patient required explantation of the expander (2.5% of total expanders). Discussion: The modification of the surgical technique represents a safe and reproducible alternative to achieve a complete closure of the muscular pocket and thus a complete coverage of the expander, consequently; avoiding some of the secondary complications drawn from an insufficient coverage of the expander.Publication Spatial navigation entropy suggests allocentric dysfunction in PPPD(2025) Faúndez, Felipe; Arévalo-Romero, Camilo; Villarroel, Karen; Lavín, Claudio; Alarcón, Kevin; Vial, Gustavo; Artus, Francisco; Billeke, Pablo; Delano, Paul H.; Breinbauer, HayoIntroduction: Persistent postural-perceptual dizziness (PPPD) is a common chronic dizziness disorder with an unclear pathophysiology. It is hypothesized that PPPD may involve functional dysfunction of the construction of inner cognitive maps, leading to disrupted spatial cognition processes as a core feature. The present studies attempt to unravel the neural mechanisms that underlie spatial navigation in PPPD. Methods: Fifty-two participants completed the study: 19 PPPD patients, 20 control subjects with vestibular disorders but without PPPD (with comparable peripheral vestibular function to the PPPD group, and 13 healthy volunteers). All underwent a virtual Morris Water Maze (vMWM) task in both, non-immersive (NI) and virtual reality (VR) modalities, assessing spatial navigation performance, gaze behavior, and head kinematics. Results: PPPD patients exhibited significantly worse navigation performance than both control groups across all metrics, with greater impairments in predominantly allocentric tasks. They also showed increased exploratory gaze behavior, unaffected by NI vs. VR modality or task condition. Head kinematics did not significantly differ between the three groups, though a non-significant trend indicated reduced head movement in both PPPD and vestibular controls. VR intolerance was highest in PPPD patients, followed by vestibular controls, with healthy volunteers showing the lowest discomfort. Discussion: Our findings suggest that PPPD involves deficits in allocentric spatial navigation, likely due to predictive coding errors and impaired internal model updating, rather than sensory input dysfunction. Increased gaze scanning may reflect compensatory mechanisms for spatial uncertainty. Notably, VR immersion did not alter navigation performance, suggesting visuo-vestibular conflict is not the primary driver of PPPD-related spatial deficits. These findings offer new insights into PPPD as a disorder of spatial cognition, opening avenues for novel diagnostic and therapeutic approaches.Item Tumor Desmoides en una Paciente Post Parto(Sociedad de Cirujanos de Chile, 2016) Salazar, Victor; Guiñez, Gonzalo; Vial, Gustavo; Aguayo, Juan; Vivanco, Marcelo; Rojas, HugoDescripción de caso con imágenes.