Factors associated with limitation of life support: Post-ICU mortality case study of a tertiary hospital.

BACKGROUND: Life-sustaining treatment limitation (LSV) is the medical act of withdrawing or not initiating measures that are considered futile in a patient's specific situation. LSV in critically ill patients remains a difficult topic to study, due to the multitude of factors that condition it. OBJECTIVE: To determine factors related to LSV in ICU in cases of post-ICU in-hospital mortality, as well as factors associated with survival after discharge from ICU. DESIGN: Retrospective longitudinal study. AMBIT: Intensive care unit of a tertiary hospital. PATIENTS: People who died in the hospitalization ward after ICU treatment between January 2014 and December 2019. INTERVENTIONS: None. This is an observational study. VARIABLES OF INTEREST: Age, sex, probability of death, type of admission, LSV in ICU, oncological disease, dependence, invasive mechanical ventilation, emergency hemodialysis, transfusion of blood products, nosocomial infection (NI), pre-ICU, intra-ICU and post-ICU stays. RESULTS: Of 114 patients who died outside the ICU, 49 had LSV registered in the ICU (42.98%). Age and stay prior to ICU admission were positively associated with LSV (OR 1,03 and 1,08, respectively). Patients without LSV had a higher post-ICU stay, while it was lower for male patients. CONCLUSIONS: Our results support that LSV established within the ICU can avoid complications commonly associated with unnecessary prolongation of stay, such as NI.

Concordance between freehand SPECT and conventional scintigraphy for sentinel lymph node detection in breast cancer.

INTRODUCTION: Freehand SPECT can be a useful imaging technique for preoperative planning of sentinel lymph node biopsy (SLNB) as it allows localization of the sentinel node by 3D and real-time tomographic imaging and determines its depth after a few minutes of scanning. The aim of the study was to evaluate the correlation between the number of detected SNs between freehand SPECT images and lymphoscintigraphy (LS). MATERIALS AND METHODS: 100 patients with a diagnosis of invasive breast cancer and no clinical evidence of lymph node involvement prospectively underwent SLNB. The preoperative study included freehand SPECT imaging at 15min after injection and LS imaging at 25 and 60-90min after injection (early and late). The observed agreement was analyzed and a concordance study was performed between the number of SNs detected with freehand SPECT and LS. RESULTS: The observed agreement in the detection of SNs between freehand SPECT and early LS was 72%; between freehand SPECT and late LS was 85%; and between early and late LS was 87%. In the concordance study, there was moderate concordance between freehand SPECT and early LS (kappa coefficient: 0.42); moderate-high concordance between freehand SPECT and late LS (kappa coefficient: 0.60); and moderate-high concordance between early and late LS (kappa coefficient: 0.70), with no significant differences between them (p-value=0.16). CONCLUSION: Freehand SPECT showed a moderate-high concordance with conventional imaging studies and could be a valid alternative for the presurgical study of SLNB in breast cancer.

Exploring the opinion of Spanish medical specialists about the usefulness of radiomics in oncology.

AIM: To describe the knowledge and opinion of health professionals regarding the usefulness of radiomics in oncology. METHODS: A 12-question questionnaire (multiple-choice responses, Likert-type scale, and open response) was developed and sent to professionals related to diagnosis/treatment of oncological diseases (Oncology, Radiodiagnosis, Nuclear Medicine, Radiation Oncology, Hematology-Oncology, Radiophysics and Pathology). Participants were classified into two groups according to their level of training: attending physicians and residents. RESULTS: 114 professionals completed the survey (54% residents, mostly from Nuclear Medicine and Radiodiagnostic specialties). Attending physicians obtained a better performance in the area pf knowledge compared to residents. Both groups of respondents agreed regarding the usefulness of radiomics to help make more accurate diagnoses and promoting the work of medical teams and the most frequent disadvantages were related to the lack of systematization in the acquisition of images and extraction of parameters, the need for the training of professionals and concern about the replacement of human work by technological tools. CONCLUSIONS: Radiomics is a novel field and the most general aspects are known by health professionals. The professionals surveyed were optimistic about the benefits provided by radiomics and other types of tools. The main problem detected was the lack of systematization in its implementation. The replacement of professionals and job loss is a concern, albeit less prevalent, and may respond to a generational phenomenon.

Progress and current utility of radiomics in PET/CT study of non-metastatic breast cancer: A systematic review.

AIM: To synthesize the current evidence of the usefulness of radiomics in PET/CT image analysis in local and locally advanced breast cancer. Also, to evaluate the methodological quality of the radiomic studies published. METHODS: Systematic review of articles in different databases until 2021 using the terms "PET", "radiomics", "texture", "breast". Only articles with human data and that included a PET image were included. Studies with simulated data and with less than 20 patients were excluded. Were extracted sample size, radiotracer used, imaging technique, and radiomics characteristics from each article. The methodological quality of the studies was determined using the QUADAS-2 tool. RESULTS: 18 articles were selected. The retrospective design was the most used. The most studied radiomic characteristic was SUVmax. Several radiomic parameters were correlated with tumor characterization, and tumor heterogeneity proved useful for predicting disease course and response to treatment. Most articles showed a high risk of bias, mainly from the patient selection. CONCLUSIONS: A high probability of bias was observed in most of the published articles. Radiomics is a developing field and more studies are needed to demonstrate its usefulness in routine clinical practice. The QUADAS-2 tool allows critical assessment of the methodological quality of the available evidence. Despite its limitations, radiomics is shown to be an instrument that can help to achieve personalized oncologic management of breast cancer.