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The high lateral resolution and sensitivity of the NanoSIMS 50 and 50L series of dynamic SIMS instruments have enabled numerous scientific advances over the past 25 years. Here, we report on the NanoSIMS-HR, the first major upgrade to the series, and analytical tests in a suite of sample types, including an aluminum sample containing silicon crystals, microalgae, and plant roots colonized with a symbiotic fungus. Significant improvements have been made in the Cs + ion source, high voltage (HV) control, stage reproducibility, and other aspects of the instrument that affect performance. The modified design of the NanoSIMS-HR thermal-ionization Cs + source enables a 5 pA primary ion beam to be focused into a 100 nm spot, a ∼2.5-fold increase compared to Cs + sources on previous instruments (∼2 pA at 100 nm). The brightness of the new Cs + source enables an ultimate lateral resolution as high as 30 nm and improved detection limits for a given analysis area. Sample stage movement accuracy is higher than 500 nm, enabling many-fold higher throughput automated analyses. With the new HV control, the primary ion beam impact energy can be reduced from 16 to 2 keV, which enables higher depth resolution during depth profiling (a 2-fold improvement), albeit with a 5-fold decrease in lateral resolution. In the NanoSIMS-HR, the secondary ion column and detection system are identical to those used in the previous series, and the isotopic analysis performance is as precise as in previous NanoSIMS instruments.

Background and Objectives: In 2017, our French 1671-bed university hospital opened a 12-bed unit for very short stays, post-emergency (unit of transitory admission in geriatric [UTAG] area), dedicated to frail patients older than 75 years requiring short-term care. We sought to investigate whether this new organization's shortened length of stay (LOS) was associated or not with a higher rate of readmission., Methods: We conducted a retrospective descriptive study based on the daily activity of the UTAG over 6 months including all patients consecutively hospitalized in the unit via the computerized medical file of the hospital. The data collected included the Rockwood score, the primary diagnoses, the LOS and any 1-month readmission., Results: From August 2019 to January 2020, 646 older adult patients were hospitalized in the UTAG. Two-thirds of the hospitalized patients were women; the mean age of this population was 86.7 ± 6.2 years. The main causes of hospitalization were infectious pathologies (19.8%), falls and their consequences (17.3%), and cardiac pathologies (17.2%). The mean LOS was of 2.7 ± 2.0. Seventy readmissions were observed in the month after discharge. One-month readmissions were more frequent when patients had presented with acute heart failure and among nursing home residents., Conclusion: The creation of the UTAG reduced LOS and so contributed to decreased iatrogenic disabilities without putting patients at increased risk of readmission. The development of cardiac and geriatric dedicated outpatient pathways and a community-based geriatric mobile team intervening in nursing homes could optimize the care of frail older adult patients and avoid readmissions., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)