Magnetic nanoparticles are of interest for biomedical applications because of their biocompatibility, tunable surface chemistry, and actuation using applied magnetic fields. Magnetic nanoparticles respond to time-varying magnetic fields via physical particle rotation or internal dipole reorientation, which can result in signal generation or conversion of magnetic energy to heat. This dynamic magnetization response enables their use as tracers in magnetic particle imaging (MPI), an emerging biomedical imaging modality in which signal is quantitative of tracer mass and there is no tissue background signal or signal attenuation. Conversion of magnetic energy to heat motivates use in nanoscale thermal cancer therapy, magnetic actuation of drug release, and rapid rewarming of cryopreserved organs. This review introduces basic concepts of magnetic nanoparticle response to time-varying magnetic fields and presents recent advances in the field, with an emphasis on MPI and conversion of magnetic energy to heat. The liver-to-spleen signal intensity ratio (LSR) on magnetic resonance imaging with gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid has been used as a parameter to assess liver function. LSR of the future remnant liver region (FR-LSR) is included in preoperative assessment of regional liver function. The aim of this study was to investigate the predictability of post-hepatectomy liver failure (PHLF) by FR-LSR. Between May 2013 and May 2019, 127 patients underwent standardized EOB-MRI for diagnosis of liver tumor before major hepatectomy. The FR-LSR on EOB-MRI was calculated by a semiautomated three-dimensional volumetric analysis system. The cutoff value of FR-LSR in association with clinically relevant PHLF was determined according to the areas under the receiver operating characteristic curves. Then, FR-LSR and clinical variables were analyzed to assess the risk of clinically relevant PHLF. In patients with preoperative biliary drainage, metastatic liver tumor, estimated future remnant livatio of the future remnant liver region might be a reliable preoperative parameter in liver functional assessment, enabling safe performance of major hepatectomy.As women surgeons continue to represent a minority within the surgical field while also holding lower ranked positions, gaining a sub-specialized set of clinical skills through surgical fellowships, like surgical critical care (SCC), is one approach to advance within the surgical field. A cross-sectional analysis was performed investigating the websites of all 106 US-based SCC fellowships. A total of 116 SCC fellows were included in this analysis, comprising 67 (59.3%) men and 46 (40.7%) women. There were 977 SCC fellowship faculty were evaluated, comprising 619 (67.9%) men and 292 (32.1%) women. Additionally, 103 SCC fellowship program directors were analyzed, consisting of 77 (74.8%) men and 26 (25.2%) women. There is a significantly lower proportion of women fellows and faculty members (P less then .001) compared to men. SCC programs with female program directors on average have higher proportions of female fellows and faculty compared to programs with male program directors (52% and 36% vs 31% and 29%, respectively). There is a stable yet unbalanced gender distribution throughout all positions in SCC fellowship programs. Actively supporting women surgeons pursuing SCC fellowship and removing barriers to their advancement through effective interventions can disrupt the persistently low prevalence of women SCC fellows, faculty, and program directors.The understanding and management of hemorrhagic shock have evolved significantly over the last 400 years. Injured patients in shock mandate immediate surgeon involvement. Every graduating surgical resident and every surgeon taking trauma call should thoroughly understand the concepts of damage control resuscitation and be prepared to care for these patients. This review seeks to revisit the history of hemorrhagic shock and the evolution of damage control resuscitation. Acromioclavicular joint (ACJ) injuries are common. Despite this, it remains unclear how best to assess, classify, and manage these cases. A simple, reliable, valid, and accurate radiographic parameter to measure ACJ displacement would allow improved consistency of diagnosis and subsequent treatment pathways. To evaluate "the circles measurement" and associated "ABC classification" as a tool for assessing ACJ displacement and injury classification. Descriptive laboratory study. The circles measurement is taken from a lateral Alexander radiograph of the shoulder. selleck The measurement is the center-to-center distance between 2 circles drawn to define the lateral extent of the clavicle and the anteromedial extent of the acromion; it is independent of the displacement plane, judging total ACJ displacement in any direction rather than trying to quantify vertical and/or horizontal displacement. When utilized clinically, the circles measurement is a single measurement calculated as the difference between values restinguish between the previously defined stable (Rockwood IIIA) and unstable (Rockwood IIIB) injuries. The results permitted objective, statistically sound parameters for the proposed ABC classification system. The circles measurement is a simple, reliable, valid, accurate, and resilient parameter for assessing ACJ displacement and can be used in conjunction with the proposed ABC classification to define ACJ injuries more accurately and objectively than previously described. This novel parameter has the potential to standardize the initial assessment and possibly the subsequent clinical management of ACJ injuries, in addition to providing a standardized measure for future research.This novel parameter has the potential to standardize the initial assessment and possibly the subsequent clinical management of ACJ injuries, in addition to providing a standardized measure for future research. Oncologic outcomes for colon cancer are optimal when chemotherapy is started within 6 to 8weeks after surgery. The study objective was to investigate the impact of operative modality and urgency on the time interval from surgery to adjuvant chemotherapy. This is a retrospective institutional tumor registry cohort study of open and laparoscopic/robotic colorectal resections for stage II-IV cancer between April 2010 and January 2018. Primary outcome was time from surgery to chemotherapy. Predictor variables were adjusted for imbalances by propensity score weighting. A total of 220 patients met inclusion criteria 171 elective (108 laparoscopic/robotic and 63 open) and 49 urgent colectomies. After propensity score weighting, there was no significant difference in time to chemotherapy between elective minimally invasive and open surgical approaches (48days vs. 58days, = .187). Only 68.9% of minimally invasive and 50.8% of open colectomy patients started chemotherapy within 8weeks of surgery. There was a significant difference ( = .