[Subacute cerebellar ataxia, an uncommon SARS-CoV-2 complication infection in older adults]. / Ataxie cérébelleuse subaiguë : une atteinte atypique par le SARS-CoV-2 chez la personne âgée.

Cerebellar ataxia can be caused by neoplasia, toxics (drugs, heavy metals, alcohol), infection, vascular lesions or auto-immune and paraneoplastic pathologies. Neuroimaging must be performed urgently in case of sudden onset and serologies as well as a lumbar puncture should be performed. Several case reports of ataxia associated with COVID-19 have been published, however the underlying pathogenic mechanisms remain unclear. This is a diagnosis of exclusion when other causes are ruled out and when the ataxia appears simultaneously to COVID-19 infection. We lack data on best management, but the prognosis appears mostly favorable with good functional recovery without any specific treatment. This paper describes the case of a patient who developed a cerebellar ataxia as the only neurological manifestation of a SARS-CoV-2 infection.

Une ataxie cérébelleuse peut être causée par un processus (para)néoplasique, auto-imun, une exposition toxique, une infection ou une lésion vasculaire. Une imagerie doit être réalisée en urgence devant toute atteinte aiguë et le bilan devrait être complété par des sérologies larges et une ponction lombaire. Plusieurs cas d'ataxie liée au Covid-19 ont été décrits, dont le mécanisme étiopathogénique reste incomplètement élucidé, le diagnostic se faisant plutôt par exclusion lorsque les symptômes apparaissent de manière concomitante à l'infection. Des données manquent sur la prise en charge mais le pronostic semble favorable, avec une bonne récupération fonctionnelle. Cet article décrit le cas d'une patiente ayant présenté une ataxie cérébelleuse comme symptôme neurologique isolé contemporain d'une infection à SARS-CoV-2.

[Fast-evolving cognitive impairment: a home-based diagnosis]. / Troubles neurocognitifs d'évolution rapide.

Syphilis is a sexually transmitted disease which incidence increased over the last 10 years in Switzerland. The clinical and neurocognitive manifestations observed in case of symptomatic neurosyphilis can be very heterogeneous and can mimic neurocognitive disorders of other origins. This article discusses the diagnostic and management pitfalls in an older patient whose diagnosis of neurosyphilis was initially suspected during a home visit.

La syphilis est une maladie à transmission sexuelle dont l'incidence est en constante augmentation ces 10 dernières années en Suisse. Les manifestations cliniques et neurocognitives observées en cas de neurosyphilis symptomatique sont très hétérogènes et peu spécifiques, pouvant mimer des troubles neurocognitifs d'autre origine. Cet article discute des écueils diagnostiques et de prise en charge d'un patient âgé chez lequel un diagnostic de neurosyphilis a été évoqué lors d'une visite à domicile.

[Geriatrics]. / Gériatrie.

Sleeping enough is associated with a reduced risk of mortality and dementia. New evidence support regular physical exercise, including at home, as a corner stone intervention to prevent falls and fractures. In contrast, supplementation with high doses of vitamin D is ineffective and even deleterious in this indication and a routine screening in asymptomatic adults is not recommended. Several studies illustrate our difficulties in prescribing and deprescribing in frail older patients and a study suggests that statins in cardiovascular primary prevention should considered only when a patient's life expectancy exceeds 2.5 years. Finally, several studies have fueled the debate about screening for hearing impairment.

Dormir ni trop ni trop peu est associé à une réduction du risque de mortalité et de déclin cognitif. De nouvelles études confirment que l'exercice physique régulier, y compris à domicile, constitue la clé de voûte de la prévention des chutes et des fractures. Par contre, la supplémentation par de hautes doses de vitamine D n'est pas efficace, voire délétère, dans cette indication et le dépistage systématique d'un déficit n'est pas recommandé chez les patients adultes asymptomatiques. Plusieurs études illustrent nos difficultés à prescrire et déprescrire, chez les patients âgés fragiles, et une étude suggère qu'un traitement de statines en prévention cardiovasculaire primaire ne se justifie que si l'espérance de vie du patient dépasse 2,5 ans. Finalement, plusieurs études sont venues nourrir le débat sur le dépistage de la presbyacousie.

Unknown osteoporosis in older patients admitted to post-acute rehabilitation.

BACKGROUND: Osteoporotic fractures are associated with increased morbidity, mortality, and increased health care use. As the number of older adults increases, identifying those at increased risk for osteoporotic fractures has become of utmost importance to providing them with preventive and therapeutic interventions. AIMS: To determine the prevalence of unknown clinical and densitometric osteoporosis and to investigate the performance of different diagnostic strategies for osteoporosis in elderly patients admitted to rehabilitation. METHOD: This is an observational study. Eligible participants were older adults admitted to rehabilitation in an academic hospital in Switzerland over an 11-month period. Patients with previously unknown osteoporosis underwent dual-energy X-ray absorptiometry (DXA), vertebral fracture assessment (VFA), and history review for past fractures. RESULTS: Complete assessment was available for 252 patients. Previously undiagnosed osteoporosis was identified in 62.3% of these patients, a proportion that was higher among women (71.5%) than men (44.8%). DXA proved most sensitive, followed by VFA and history review. Results differed across gender: DXA remained the most sensitive single test among women, but VFA proved most sensitive in men. The best test to combine with history review was DXA in women (detection increasing from 47.5 to 93.2%) and VFA in men (detection increasing from 35.9 to 84.6%). CONCLUSIONS: Prevalence of previously unknown osteoporosis appears very high in elderly patients admitted to post-acute rehabilitation. The combination of history review of previous fractures with DXA in women and with VFA in men appears the best two-step strategy to improving detection of osteoporosis in this population.

[Cancer-related cognitive impairment in older adults]. / Troubles neurocognitifs chez les personnes âgées avec maladie oncologique.

Chemotherapy is associated with transient or permanent cognitive dysfunction ranging from subjective complaints to measurable deficits in working memory, attention and language. Given that old age may be related to cognitive decline, the interaction between chemotherapy-induced cognitive impairment and the effects of age is of growing concern in view of our aging population. Chemotherapy-associated cognitive dysfunction may have an additive impact on pre-existing age-related cognitive performance decline, which calls for awareness in its detection, to reduce impact on quality of life and improve management of older patients. We discuss here the « chemobrain ¼, concept, review the existing evidence about pathophysiology, neuroimaging and cognitive phenotype and propose practical tools for routine detection in the outpatient setting.

Les chimiothérapies peuvent induire une dysfonction cognitive transitoire ou permanente, pouvant aller d'une plainte cognitive subjective à une atteinte réelle de la mémoire de travail, de l'attention ou du langage. L'interaction entre l'atteinte cognitive attribuée à ces thérapies et celle liée à l'âge est une question grandissante compte tenu du vieillissement de la population. Elle justifie une attention particulière à la détection précoce de troubles cognitifs afin d'en réduire l'impact négatif sur la qualité de vie et optimiser la prise en charge médicale. Dans cet article, nous abordons le concept de « chemobrain ¼, et en revoyons les connaissances actuelles de physiopathologie, de neuro-imagerie ainsi que les phénotypes neuropsychologiques, afin de proposer quelques outils de détection et de prise en charge au cabinet.

[COVID-19 infection in the elderly in French-speaking Switzerland: an inventory of beliefs, convictions and certainties]. / Infection COVID-19 chez les personnes âgées en Suisse Romande - Un état des lieux entre croyances, convictions et certitudes.

Most patients hospitalized for COVID-19 are aged over 70 years old, and half of those who die are over 83 years old. Older patients do not always present with typical symptoms (fever, cough and dyspnoea) but sometimes are and remain asymptomatic (contact screening), or have aspecific presentations (altered general condition, falls, delirium, unusual fatigue). Rectal swab, which minimizes exposition risk, appears useful in long-term care patients with diarrhea. Older age is associated with worse prognosis, but the analysis should be refined by means of prognostic indexes that account for the heterogeneous health, functional, and cognitive status of the elderly population. Gathering elderly patients' wishes and assessing their remaining life expectancy allows to anticipate care decisions according to the level of tension in the health system.

La majorité des patients COVID-19 hospitalisés ont plus de 70 ans et 50 % de ceux qui en décèdent ont plus de 83 ans. La clinique typique n'est pas toujours présente chez les personnes très âgées qui peuvent être et rester totalement asymptomatiques (dépistage contact) ou avoir des manifestations aspécifiques (baisse de l'état général, chutes, delirium, fatigue). Le frottis anal, qui minimise le risque d'exposition, peut s'avérer très utile en EMS lors de diarrhées. L'âge avancé est un marqueur de mauvais pronostic, mais devrait être pondéré à l'aide d'index pronostiques pour tenir compte de l'hétérogénéité de l'état de santé, fonctionnel et cognitif à l'âge avancé. Recueillir les souhaits de la personne et évaluer son espérance de vie restante permet d'anticiper les décisions de soins selon le niveau de tension du système de santé.

[Year in review : geriatrics]. / Gériatrie.

In 2018, new recommendations about the prevention of falls and fractures emphasized the benefits from exercise and from multimodal prevention programs but did not endorse any more vitamin D supplementation for falls prevention. Results were contrasted for several studies testing exercise (negative) and cognitive training (mixed results) in the management of older patients suffering from neurocognitive disorders. The new direct oral anticoagulants are increasingly prescribed in older patients despite the paucity of data. New information has been released in 2018 from « real-world ¼ data that seem reassuring about their risk/benefit ratio in old-old patients, provided a careful prescription. Finally, the Mediterranean diet is still gaining credit with a new study showing its benefits in preventing frailty in community-dwelling older persons.

En 2018, l'intérêt de l'activité physique et des programmes de prévention multimodaux est confirmé pour la prévention des chutes, mais l'utilisation de la vitamine D dans cette indication est remise en question. Pour les pathologies neurocognitives, les résultats sont contrastés concernant l'activité physique, alors qu'une revue systématique confirme les bénéfices, certes modestes, de l'entraînement cognitif sur les performances cognitives et la qualité de vie des patients et de leurs proches. Les nouveaux anticoagulants sont de plus en plus largement utilisés chez les patients âgés malgré des données encore limitées, mais plusieurs études du « monde réel ¼ semblent confirmer leur bon rapport risques/bénéfices aussi chez ces patients. Le régime méditerranéen a le vent en poupe, une étude rapporte un bénéfice sur l'incidence de la fragilité.

Concern about Falling and Complexity of Free-Living Physical Activity Patterns in Well-Functioning Older Adults.

BACKGROUND: Fall-related psychological concerns are common among older adults, potentially contributing to functional decline as well as to restriction of activities and social participation. To effectively prevent such negative consequences, it is important to understand how even very low concern about falling could affect physical activity behavior in everyday life. We hypothesized that concern about falling is associated with a reduction in diversity, dynamics, and performance of daily activities, and that these features can be comprehensively quantified in terms of complexity of physical activity patterns. METHODS: A sample of 40 community-dwelling older adults were assessed for concern about falling using the Falls Efficacy Scale-International (FES-I). Free-living physical activity was assessed using a set of metrics derived from data recorded with a chest-worn tri-axial accelerometer. The devised metrics characterized physical activity behavior in terms of endurance (total locomotion time, longest locomotion period, usual walking cadence), performance (cadence of longest locomotion period, locomotion periods with at least 30 steps and 100 steps/min), and complexity of physical activity patterns. Complexity was quantified according to variations in type, intensity, and duration of activities, and was considered as an adaptive response to environmental exigencies over the course of the day. RESULTS: Based on FES-I score, participants were classified into two groups: not concerned at all/fully confident (n = 25) and concerned/less confident (n = 15). Demographic and health-related variables did not differ significantly between groups. Comparison of physical activity behavior indicated no significant differences for endurance-related metrics. In contrast, performance and complexity metrics were significantly lower in the less confident group compared to the fully confident group. Among all metrics, complexity of physical activity patterns appeared as the most discriminative feature between fully confident and less confident participants (p = 0.001, non-parametric Cliff's delta effect size = 0.63). CONCLUSIONS: These results extend our understanding of the interplay between low concern about falling and physical activity behavior of community-dwelling older persons in their everyday life context. This information could serve to better design and evaluate personalized intervention programs in future prospective studies.

[Staying at home : which dimensions to assess in older persons ?] / Maintien à domicile : quelles dimensions prendre en compte chez les personnes âgées ?

Defining the limits of home long term care is not an easy task. For the health care professionals, deciding whether to support older patients in their plan to stay at home requires a structured approach, based on objective information. It is critical to systematically collect information on a patient's needs resulting from medical problems and their management, from his or her functional, cognitive, affective and nutritional status, as well as on mobility, social, spiritual, and financial resources that can be mobilized by the patient, his or her relatives, and the health care professionals. This information allows to first determine the potential gap between the patient's needs and available resources, and then to define possible scenarios to discuss with the patient and his or her relatives to reach a sustainable decision.

Définir les limites du maintien à domicile d'une personne âgée est rarement simple. Lorsque la situation paraît précaire, la réflexion qui prépare la décision des professionnels de soutenir ou pas un patient dans son projet de rester à domicile doit se baser sur une approche structurée et la récolte d'informations si possible objectives. Il faut aborder systématiquement les besoins en soutien découlant des problèmes médicaux, de l'état fonctionnel, cognitif, affectif et nutritionnel, ainsi que la mobilité, les ressources sociales, spirituelles et financières mobilisables par le patient, son entourage et/ou les professionnels. Une fois l'étendue du décalage entre besoins et ressources déterminée, des scénarios peuvent être élaborés, priorisés, puis discutés avec le patient et, le cas échéant, son entourage afin d'aboutir à une décision.

[Management of infectious diarrhea in nursing homes]. / Prise en charge des diarrhées infectieuses dans les établissements médico-sociaux.

Infectious diarrheas are of great concern in nursing homes and can engender outbreaks. Their importance in terms of morbidity, mortality and health economics justify the implementation of prevention and control measures. Although past studies emphasize the importance of infectious diarrheas occurring during hospitalization, data on nursing homes epidemiology remain scarce. This article is founded on recent data of the literature, on recommendations for the management of infectious diarrheas and for prevention and control of outbreaks in nursing homes.

Les diarrhées infectieuses sont une préoccupation majeure dans les établissements médico-sociaux et peuvent être à l'origine d'épidémies. Leur importance en termes de morbidité, mortalité et d'économie de santé justifie le développement de moyens de prévention et de contrôle. Si des études antérieures soulignent la part des diarrhées infectieuses survenant lors des hospitalisations, peu de travaux se sont intéressés à l'incidence de cette pathologie chez les résidents d'établissements médico-sociaux. Cet article est fondé sur les données récentes de la littérature concernant les diarrhées infectieuses, les recommandations de prise en charge ainsi que celles portant sur la prévention et le contrôle dans les établissements médico-sociaux.

Physical Behavior in Older Persons during Daily Life: Insights from Instrumented Shoes.

Activity level and gait parameters during daily life are important indicators for clinicians because they can provide critical insights into modifications of mobility and function over time. Wearable activity monitoring has been gaining momentum in daily life health assessment. Consequently, this study seeks to validate an algorithm for the classification of daily life activities and to provide a detailed gait analysis in older adults. A system consisting of an inertial sensor combined with a pressure sensing insole has been developed. Using an algorithm that we previously validated during a semi structured protocol, activities in 10 healthy elderly participants were recorded and compared to a wearable reference system over a 4 h recording period at home. Detailed gait parameters were calculated from inertial sensors. Dynamics of physical behavior were characterized using barcodes that express the measure of behavioral complexity. Activity classification based on the algorithm led to a 93% accuracy in classifying basic activities of daily life, i.e., sitting, standing, and walking. Gait analysis emphasizes the importance of metrics such as foot clearance in daily life assessment. Results also underline that measures of physical behavior and gait performance are complementary, especially since gait parameters were not correlated to complexity. Participants gave positive feedback regarding the use of the instrumented shoes. These results extend previous observations in showing the concurrent validity of the instrumented shoes compared to a body-worn reference system for daily-life physical behavior monitoring in older adults.

[Geriatry]. / Gériatrie.

n 2015, several studies about hypertension and TAVI emphasize the importance of individualizing treatment goals in very old or vulnerable patients. The anti-pneumococcal conjugate vaccine has demonstrated its effectiveness in community-acquired pneumonia and the arsenal against shingles is extended by a subunit vaccine. A clinical trial confirms the ineffectiveness of testosterone supplementation in arteriosclerotic disease but not its safety. Regarding dementia, a rigorous study shows that a multimodal approach can reduce the risk of cognitive decline. The value of imaging technologies using Tau protein radiotracers is confirmed for monitoring the evolution of Alzheimer's disease and the latest studies about anti-amyloid vaccines finally demonstrate encouraging results.

[Review in geriatric medicine 2014]. / Gériatrie.

Several studies contributed to improving the diagnostic and prognostic assessment of delirium in hospitalized older patients. Direct patient education proved efficient in benzodiazepines withdrawal. A position statement of the American Geriatrics Society does not recommend tube feeding when eating difficulties arise in older persons suffering from advanced dementia. Several studies emphasized once again the potential importance of preventative interventions (in particular physical activity) to prevent or delay dementia occurrence. Two randomized controlled trials of monoclonal antibodies that bind amyloid did not show benefit in patients with mild-to-moderate Alzheimer's dementia (AD). In contrast, vitamin E reduced functional decline in these patients, and citalopram reduced agitation among AD patients as well as their caregiver's stress.

Classification and characterization of postural transitions using instrumented shoes.

The frequency and quality of sit-to-stand and stand-to-sit postural transitions decrease with age and are highly relevant for fall risk assessment. Accurate classification and characterization of these transitions in daily life of older adults are therefore needed. In this study, we propose to use instrumented shoes for postural transition classification as well as transition duration estimation from insole force signals. In the first part, data were collected with 10 older adults and 10 young participants performing transitions in the laboratory while wearing the instrumented shoes, without arm assistance. A wavelet approach was used to transform the insole force data, and candidate events were selected for transition duration estimation. Transition durations were then validated against a model based on force plate reference. Vertical force estimation was also compared to force plate measurement. In the second part, postural transitions were classified in daily life using the instrumented shoes and validated against a highly accurate wearable system. Transition duration was estimated with an error ranging from 10 to 20% while the error for vertical force estimation was 7%. Postural transition classification was achieved with excellent sensitivity and precision exceeding 90%. In conclusion, the instrumented shoes are suitable for classifying and characterizing postural transitions in daily life conditions of healthy older adults. Graphical abstract "Experimental setup showing instrumented shoes, reference force plate, as well as IMUs used for postural transition classification and duration estimation comparison".

Instrumented Shoes for Real-Time Activity Monitoring Applications.

Activity monitoring in daily life is gaining momentum as a health assessment tool, especially in older adults and at-risk populations. Several research-based and commercial systems have been proposed with varying performances in classification accuracy. Configurations with many sensors are generally accurate but cumbersome, whereas single sensors tend to have lower accuracies. To this end, we propose an instrumented shoes system capable of accurate activity classification and gait analysis that contains sensors located entirely at the level of the shoes. One challenge in daily activity monitoring is providing punctual and subject-tailored feedback to improve mobility. Therefore, the instrumented shoe system was equipped with a Bluetooth® module to transmit data to a smartphone and perform detailed activity profiling of the monitored subjects. The potential applications of such a system are numerous in mobility and fall risk-assessment as well as in fall prevention.

Instrumented shoes for activity classification in the elderly.

Quantifying daily physical activity in older adults can provide relevant monitoring and diagnostic information about risk of fall and frailty. In this study, we introduce instrumented shoes capable of recording movement and foot loading data unobtrusively throughout the day. Recorded data were used to devise an activity classification algorithm. Ten elderly persons wore the instrumented shoe system consisting of insoles inside the shoes and inertial measurement units on the shoes, and performed a series of activities of daily life as part of a semi-structured protocol. We hypothesized that foot loading, orientation, and elevation can be used to classify postural transitions, locomotion, and walking type. Additional sensors worn at the right thigh and the trunk were used as reference, along with an event marker. An activity classification algorithm was built based on a decision tree that incorporates rules inspired from movement biomechanics. The algorithm revealed excellent performance with respect to the reference system with an overall accuracy of 97% across all activities. The algorithm was also capable of recognizing all postural transitions and locomotion periods with elevation changes. Furthermore, the algorithm proved to be robust against small changes of tuning parameters. This instrumented shoe system is suitable for daily activity monitoring in elderly persons and can additionally provide gait parameters, which, combined with activity parameters, can supply useful clinical information regarding the mobility of elderly persons.