Carlos Salvador Ovalle Torres

Dr. Carlos Salvador Ovalle Torres

orcid

Research Focus & Metrics

Academic Career Length

4Years (2023-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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22 December 2023 in Surgical Neurology International
Verified
Journal Article
Open access
CTCarlos Salvador Ovalle Torres
Carlos Salvador Ovalle Torres
AMAlfredo Espinosa Mora
Alfredo Espinosa Mora
Alvaro CamperoAlvaro Campero
Alvaro Campero
ICIype Cherian
Iype Cherian
ASAlbert Sufianov
Albert Sufianov
Nicola MontemurroNicola Montemurro
Nicola Montemurro
Background: The main objectives of this paper are to outline the essential tools, instruments, and equipment needed to set up a functional microsurgery laboratory that is affordable for low-income hospitals and to identify cost-effective alternatives for acquiring microsurgical equipment, such as refurbished or donated instruments, collaborating with medical device manufacturers for discounted rates, or exploring local suppliers. Methods: Step-by-step instructions were provided on setting up the microsurgery laboratory, including recommendations for the layout, ergonomic considerations, lighting, and sterilization processes while ensuring cost-effectiveness, as well as comprehensive training protocols and a curriculum specifically tailored to enhance microsurgical skills in neurosurgery residents. Results: We explored cost-effective options for obtaining microsurgery simulators and utilizing open-source or low-cost virtual training platforms. We also included guidelines for regular equipment maintenance, instrument sterilization, and establishing protocols for infection control to ensure a safe and hygienic learning environment. To foster collaboration between low-income hospitals and external organizations or institutions that can provide support, resources, or mentorship, this paper shows strategies for networking, knowledge exchange, and establishing partnerships to enhance microsurgical training opportunities further. We evaluated the impact and effectiveness of the low-cost microsurgery laboratory by assessing the impact and effectiveness of the established microsurgery laboratory in improving the microsurgical skills of neurosurgery residents. About microsutures and microanastomosis, after three weeks of training, residents showed improvement in “surgical time” for ten separate simple stitches (30.06 vs. 8.65 min) and ten continuous single stitches (19.84 vs. 6.51 min). Similarly, there was an increase in the “good quality” of the stitches and the suture pattern from 36.36% to 63.63%. Conclusion: By achieving these objectives, this guide aims to empower low-income hospitals and neurosurgery residents with the necessary resources and knowledge to establish and operate an affordable microsurgery laboratory, ultimately enhancing the quality of microsurgical training and patient care in low-income countries.

27 May 2024 in Brain Sciences
Verified
Journal Article
Open access
PDF file
ASAlbert Sufianov
Albert Sufianov
CTCarlos Salvador Ovalle Torres
Carlos Salvador Ovalle Torres
NTNoel Omar Cruz Torres
Noel Omar Cruz Torres
JGJavier Contreras Guerrero
Javier Contreras Guerrero
Emir BegagićEmir Begagić
Emir Begagić
Manuel De Jesus Encarnacion RamirezManuel De Jesus Encarnacion Ramirez
Manuel De Jesus Encarnacion Ramirez
Background and Objectives: Spinal surgery, particularly for cervical pathologies such as myelopathy and radiculopathy, requires a blend of theoretical knowledge and practical skill. The complexity of these conditions, often necessitating surgical intervention, underscores the need for intricate understanding and precision in execution. Advancements in neurosurgical training, especially with the use of low-cost 3D models for simulating cervical spine tumor removal, are revolutionizing this field. These models provide the realistic and hands-on experience crucial for mastering complex neurosurgical techniques, filling gaps left by traditional educational methods. Materials and Methods: This study aimed to assess the effectiveness of 3D-printed cervical vertebrae models in enhancing surgical skills, focusing on tumor removal, and involving 20 young neurosurgery residents. These models, featuring silicone materials to simulate the spinal cord and tumor tissues, provided a realistic training experience. The training protocol included a laminectomy, dural incision, and tumor resection, using a range of microsurgical tools, focusing on steps usually performed by senior surgeons. Results: The training program received high satisfaction rates, with 85% of participants extremely satisfied and 15% satisfied. The 3D models were deemed very realistic by 85% of participants, effectively replicating real-life scenarios. A total of 80% found that the simulated pathologies were varied and accurate, and 90% appreciated the models’ accurate tactile feedback. The training was extremely useful for 85% of the participants in developing surgical skills, with significant post-training confidence boosts and a strong willingness to recommend the program to peers. Conclusions: Continuing laboratory training for residents is crucial. Our model offers essential, accessible training for all hospitals, regardless of their resources, promising improved surgical quality and patient outcomes across various pathologies.

22 July 2024 in Medical Sciences
Verified
Journal Article
Open access
PDF file
RNRenat Nurmukhametov
Renat Nurmukhametov
Manuel De Jesus Encarnacion RamirezManuel De Jesus Encarnacion Ramirez
Manuel De Jesus Encarnacion Ramirez
MDMedet Dosanov
Medet Dosanov
AMAbakirov Medetbek
Abakirov Medetbek
SKStepan Kudryakov
Stepan Kudryakov
SSSalman Sharif
Salman Sharif
Introduction: Lumbar foraminal stenosis (LFS) occurs primarily due to degenerative changes in older adults, affecting the spinal foramina and leading to nerve compression. Characterized by pain, numbness, and muscle weakness, LFS arises from structural changes in discs, joints, and ligaments, further complicated by factors like inflammation and spondylolisthesis. Diagnosis combines patient history, physical examination, and imaging, while management ranges from conservative treatment to surgical intervention, underscoring the need for a tailored approach. Materials and Methods: This multicenter study, conducted over six years at a tertiary hospital, analyzed the volumetric dimensions of lumbar foramina and their correlation with nerve structures in 500 patients without lumbar pathology. Utilizing high-resolution MRI with a standardized imaging protocol, eight experienced researchers independently reviewed the images for accurate measurements. The study emphasized quality control through the calibration of measurement tools, double data entry, validation checks, and comprehensive training for researchers. To ensure reliability, interobserver and intraobserver agreements were analyzed, with statistical significance determined by kappa statistics and the Student’s t-test. Efforts to minimize bias included blinding observers to patient information and employing broad inclusion criteria to mitigate referral and selection biases. The methodology and findings aim to enhance the understanding of normal lumbar foramina anatomy and its implications for diagnosing and treating lumbar conditions. Results: The study’s volumetric analysis of lumbar foramina in 500 patients showed a progressive increase in foraminal volume from the L1/L2 to the L5/S1 levels, with significant enlargement at L5/S1 indicating anatomical and biomechanical complexity in the lumbar spine. Lateral asymmetry suggested further exploration. High interobserver and intraobserver agreement levels (ICC values of 0.91 and 0.95, respectively) demonstrated the reliability and reproducibility of measurements. The patient cohort comprised 58% males and 42% females, highlighting a balanced gender distribution. These findings underscore the importance of understanding foraminal volume variations for lumbar spinal health and pathology. Conclusion: Our study significantly advances spinal research by quantifying lumbar foraminal volumes, revealing a clear increase from the L1/L2 to the L5/S1 levels, indicative of the spine’s adaptation to biomechanical stresses. This provides clinicians with a precise tool to differentiate between pathological narrowing and normal variations, enhancing the detection and treatment of lumbar foraminal stenosis. Despite limitations like its cross-sectional design, the strong agreement in measurements underscores the method’s reliability, encouraging future research to further explore these findings’ clinical implications.

5 April 2024 in Surgical Neurology International
Verified
Journal Article
Open access
GSGervith Reyes Soto
Gervith Reyes Soto
JCJose Carrillo
Jose Carrillo
BCBernardo Cacho-Díaz
Bernardo Cacho-Díaz
CTCarlos Salvador Ovalle Torres
Carlos Salvador Ovalle Torres
CRCARLOS CASTILLO RANGEL
CARLOS CASTILLO RANGEL
Nicola MontemurroNicola Montemurro
Nicola Montemurro
Background: Orbital tumors, arising within the bony orbit and its contents, present diverse challenges due to their varied origins and complex anatomical context. These tumors, classified as primary, secondary, or metastatic, are further subdivided into intraconal and extraconal based on their relationship with the muscle cone. This classification significantly influences surgical approach and management. This study highlights surgical experiences with orbital tumors, underscoring the importance of tailored surgical approaches based on the lesion’s site and its proximity to the optic nerve. Methods: This retrospective study at the National Institute of Cancer’s Head and Neck Department (2005–2014) analyzed 29 patients with orbital tumors treated with surgery, radiotherapy, chemotherapy, or combinations of them. Patient demographics, tumor characteristics, and treatment responses were evaluated using computed tomography (CT), magnetic resonance imaging, and positron emission tomography-CT imaging. Malignant tumors often required orbital exenteration and reconstruction, highlighting the study’s commitment to advancing orbital tumor treatment. Results: 29 patients (18 females and 11 males, age 18–88 years, mean 53.5 years) with orbital tumors exhibited symptoms such as decreased vision and exophthalmos. Tumors included primary lesions like choroidal melanoma and secondary types like epidermoid carcinoma. Treatments varied, involving a multidisciplinary team for surgical approaches like exenteration, with follow-up from 1 to 9 years. Radiotherapy and chemotherapy were used for specific cases. Conclusion: Our study underscores the need for a multidisciplinary approach in treating orbital tumors, involving various surgical specialists and advanced technologies like neuronavigation for tailored treatment. The integration of surgery with radiotherapy and chemotherapy highlights the effectiveness of multidimensional treatment strategies.

16 May 2025 in Surgical Neurology International
Verified
Journal Article
Open access
CTCarlos Salvador Ovalle Torres
Carlos Salvador Ovalle Torres
GSGervith Reyes Soto
Gervith Reyes Soto
Alvaro CamperoAlvaro Campero
Alvaro Campero
CRCARLOS CASTILLO RANGEL
CARLOS CASTILLO RANGEL
AGAlejandro Gonzalez
Alejandro Gonzalez
AAAgustín Dorantes Argandar
Agustín Dorantes Argandar
Background: The internal carotid artery (ICA) has multiple classification systems; it is essential for brain blood supply, which has bone/neurovascular relationships of wide neurosurgical interest; its anatomy must be known in detail, its angiographic-imaging aspect (endovascular), its ventral aspect (endoscopic endonasal approaches); and its lateral aspect (anterolateral skull base surgery). Our objectives were to identify coincidences/differences between the main classifications of the ICA to improve its surgical-anatomical understanding, unify the terminology of ICA segments, avoid confusion, and carry out a simple description. Methods: There are differences between classifications; however, these may overlap each other and determine the correspondence between segments, regardless of their purpose. Literature on ICA classifications was reviewed; a cadaver endonasal endoscopic and anterolateral skull base dissection was performed, obtaining representative images of the ICA, as well as angiography. The main terminology of ICA segments was collected, and artistic-anatomical illustrations were created to facilitate the study of ICA. Results: We compared the endoscopic roadmap to the ICA by Labib/Kassam, the extradural ICA at its lateral aspect by Cherian, and the classic classification by Bouthillier (as well as a small reference to the classification by Gibo/Rhoton). We found the shared characteristics and differences between classifications, with a total of 17 interrelated segments, with a variety of nomenclature and anatomical extension. Initially, we except the extradural ICA by Cherian because it uses almost the same nomenclature that Labib, varying in one segment, which coincides with the nomenclature of Bouthillier and does not change the total summary. The initial and terminal segments were nominative/anatomically equivalent, and there is anatomical nominal variation in the intermediate segments and its relation/correspondence has been easily demonstrated. Conclusion: Anatomical knowledge of all aspects of ICA using its main classifications, the relation between them, and its diversity of nomenclature is essential to improve its anatomical-surgical understanding and avoid anatomical nominal confusion. It can be achieved through our comparative tables/illustrations.