RESUMO
PURPOSE: This study aims to assess the efficacy of current measurement strategies for lung sizing and the feasibility of future use of computed tomography (CT)-derived lung volumes to predict a donor-recipient lung size match during bilateral lung transplants. METHODS: We reviewed the data of 62 patients who underwent bilateral lung transplantation for interstitial lung disease and/or idiopathic pulmonary fibrosis from 2018 to 2019. Data for recipients was retrieved from the department's transplant database and medical records, and the donor's data was retrieved from the DonorNet. The data included demographic data, lung heights, measured total lung capacity (TLC) from plethysmography for recipients and estimated TLC for donors, clinical data, and CT-derived lung volumes in both pre- and post-transplant recipients. The post-transplant CT-derived lung volume in recipients was used as a surrogate for donor lung CT volumes due to inadequate or poor donor CT data. Computed tomography-derived lung volumes were calculated using thresholding, region growing, and cutting techniques on Computer-Aided Design and Mimics (Materialise NV, Leuven, Belgium) programs. Preoperative CT-derived lung volumes in recipients were compared with the plethysmography TLC, Frustum Model, and donor-predicted TLC. The ratio of the recipient's pre-and postoperative CT-derived volumes, the ratio of preoperative CT-derived lung volume, and donor-estimated TLC were studied to detect a correlation with 1-year outcomes. RESULTS: The recipient preoperative CT-derived volume correlated with the recipient preoperative plethysmography TLC (Pearson correlation coefficient [PCC] of 0.688) and with the recipient Frustum model volume (PCC of 0.593). The recipient postoperative CT-derived volume correlated with the recipient's postoperative plethysmography TLC (PCC of 0.651). There was no statistically significant correlation between recipients' CT-derived pre- or postoperative volume with donor-estimated TLC. The ratio of preoperative CT-derived volume to donor-estimated TLC correlated inversely with the length of ventilation (P value = .0031). The ratio of postoperative CT-derived volume to preoperative CT-derived volume correlated inversely with delayed sternal closure (P = .0039). No statistically significant correlations were found in evaluating outcomes related to lung oversizing in the recipient (defined as a postoperative to preoperative CT-derived lung volume ratio of >1.2). CONCLUSIONS: Generating CT-derived lung volumes is a valid and convenient method for evaluating lung volumes for transplantation in patients with ILD and/or IPF. Donor-estimated TLC should be interpreted carefully. Further studies should derive donor lung volumes from CT scans for a more accurate evaluation of lung size matching.
Assuntos
Fibrose Pulmonar Idiopática , Doenças Pulmonares Intersticiais , Transplante de Pulmão , Humanos , Medidas de Volume Pulmonar , Pulmão/diagnóstico por imagem , Pulmão/cirurgia , Doenças Pulmonares Intersticiais/diagnóstico por imagem , Doenças Pulmonares Intersticiais/cirurgia , Tomografia Computadorizada por Raios X , Fibrose Pulmonar Idiopática/diagnóstico por imagem , Fibrose Pulmonar Idiopática/cirurgiaRESUMO
OBJECTIVES: This study examined the extent, range and nature of the published literature, prison policies and technical guidance relating to the ethical conduct of health research in prisons in low- and middle-income countries (LMICs). STUDY DESIGN: Scoping Review. METHODS: We adhered to the five stages of the scoping review iterative process: identifying the research question, identifying relevant studies, study selection, charting the data, and collating, summarizing and content analysis of polices. Disagreements around allocation of content were resolved through team discussion. We also appraised the quality of the included articles. RESULTS: We included nine records that examined the ethical aspects of the conduct of health research in prisons in LMICs; eight of these were peer-reviewed publications, and one was a toolkit. Despite the unique vulnerabilities of this group, we could find no comprehensive guidelines on the ethical conduct of health research in prisons in LMICs. CONCLUSIONS: The majority of the world's imprisoned populations are in LMICs, and they have considerable health needs. Research plays an important role in addressing these needs and in so doing, will contribute to the achievement of the Sustainable Development Goals. With regards to health research, imprisoned people in LMICs are 'left behind'; there is a lack of clear, prison-focused guidance and oversight to ensure high quality ethical health research so necessary in LMICs. There is an urgent need for prison health experts to work with health research ethics experts and custodial practitioners for procedural issues in the development of prison-specific ethical guidance for health research in LMICs aligned with international standards.