Browsing by Author "Parra, Sonia"

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    Hands-On Training Courses for Cervical Cancer Screening, Diagnosis, and Treatment Procedures in Low- and Middle-Income Countries
    (American Society of Clinical Oncology, 2022) Phoolcharoen, Natacha; Varon, Melissa Lopez; Baker, Ellen; Parra, Sonia; Carns, Jennifer; Cherry, Katelin; Smith, Chelsey; Sonka, Theresa; Doughtie, Kathleen; Lorenzoni, Cesaltina; Richards-Kortum, Rebecca; Schmeler, Kathleen; Salcedo, Mila Pontremoli; Bioengineering
    In 2018, there were approximately 570,000 new cases of cervical cancer worldwide. More than 85% of cases occurred in low- and middle-income countries (LMICs), primarily because of poor access to screening and a limited number of medical providers trained to diagnose and treat cervical precancerous lesions. Our objective was to provide locally arranged, hands-on training courses for medical providers in LMICs to learn to perform cervical cancer screening, diagnosis, and treatment procedures. The courses included didactic lectures and hands-on training stations using low-cost simulation models developed by bioengineers and students at Rice University in Houston, TX, United States, and the Malawi Polytechnic in Blantyre, Malawi. The hands-on training stations included visual inspection with acetic acid (VIA), colposcopy, cervical biopsy, endocervical curettage, loop electrosurgical excision procedure (LEEP), and thermal ablation. Provider pre- and postcourse confidence levels in performing the procedures were evaluated. From February 2017 to January 2020, we arranged 15 hands-on training courses in seven cities across six countries (El Salvador, Mozambique, Trinidad and Tobago, Lesotho, Malawi, and Nepal). Overall, there were 506 participants. The average number of participants per course was 38 (range 19-92). The participants included doctors, nurses, and midwives. The course duration varied from 1 to 3 days. Increased confidence in performing VIA, colposcopy and cervical biopsy, ablation, and LEEP was reported by 69%, 71%, 61%, and 76% of participants, respectively. Our findings suggest that locally arranged, hands-on cervical cancer prevention training courses in LMICs can improve provider confidence in performing cervical cancer screening, diagnosis, and treatment procedures. These courses are part of a larger strategy to build local capacity for delivering and improving cervical cancer prevention services in LMICs.
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    Is Proflavine Exposure Associated with Disease Progression in Women with Cervical Dysplasia? A Brief Report
    (Wiley, 2018) Pantano, Naitielle; Hunt, Brady; Schwarz, Richard A.; Parra, Sonia; Cherry, Katelin; Possati‐Resende, Júlio César; Longatto‐Filho, Adhemar; Fregnani, José Humberto Tavares Guerreiro; Castle, Philip E.; Schmeler, Kathleen; Richards‐Kortum, Rebecca; Bioengineering
    Proflavine is an acridine dye used with high-resolution microendoscopy for in vivo diagnostic evaluation of cervical epithelial cells. However, there are concerns that even short-term exposure of cervical tissue to dilute proflavine may increase cervical cancer risk. We performed a retrospective analysis of women referred for colposcopy to Barretos Cancer Hospital comparing the risk of cervical disease progression in those whose cervical tissue was (n = 232) or was not exposed (n = 160) to proflavine. Patients in both groups underwent treatment and follow-up based on histopathologic results and per the local standards of care. Progression of disease was evaluated by comparing histopathology from the initial visit to the worst subsequent histopathology result from all follow-up visits. Mean duration of follow-up was 18.7 and 20.1 months for the proflavine-exposed and controls groups, respectively. There were no significant differences in disease progression from normal/CIN1 to CIN2/3 or from any initial diagnosis to invasive cancer between the proflavine exposed and control groups overall. Risks of cervical dysplasia progression observed in this study are in agreement with those of the natural history of cervical cancer. Our results suggest that cervical exposure to dilute proflavine does not increase the risk of cervical precancer and cancer.
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    Low-Cost Instructional Apparatus to Improve Training for Cervical Cancer Screening and Prevention
    (Wolters Kluwer, 2019) Parra, Sonia; Oden, Maria; Schmeler, Kathleen; Richards-Kortum, Rebecca; Rice360 Student Team; Bioengineering
    BACKGROUND: Cervical cancer remains one of the leading causes of cancer for women in medically underserved areas. This is in part due to a lack of trained clinicians to provide the necessary diagnosis and treatment of precancerous lesions to prevent cervical cancer. Increasing medical provider knowledge and skills is important for the early detection and prevention of cervical precancer and cancer in medically underserved areas of the United States and globally. METHOD: LUCIA is a low-cost, universal cervical cancer instructional apparatus that can be used to teach and practice a variety of essential skills for cervical cancer screening, diagnosis, and treatment, including: visual inspection with acetic acid, Pap and human papillomavirus DNA specimen collection, colposcopy, endocervical curettage, cervical biopsy, cryotherapy, and loop electrosurgical excision procedure. EXPERIENCE: LUCIA was used to provide hands-on training in six courses held in Texas (n=3), El Salvador (n=1), and Mozambique, Africa (n=2). Standardized provider evaluations were administered at three of these courses and resulted in mean scores of 4.12/5 for usefulness, 4.46/5 for skill improvement, and 4.43/5 for ease of skill evaluation. CONCLUSION: LUCIA provides dynamic, real-time feedback that allows trainees to learn and practice important skills related to cervical cancer prevention while simulating a patient exam.