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Context Before updating the French guidelines on postoperative pain treatment in 2015, the Pain Committee of the French Society of Anaesthesiology and Intensive Care (SFAR) conducted a survey on the medical use of ketamine in France. Methods An online questionnaire was nationally distributed to members of SFAR, the French Pain Society (SFETD) and the French Society of Emergency Medicine (SFMU). The questionnaire included questions on demographic data, the type of patients for whom ketamine was prescribed, the doses used, the side effects and safety measures associated with the administration of ketamine. Results A total of 1388 questionnaires were analysed. Ninety-two percent of the responders declared that they used ketamine. Ketamine was widely used as anti-hyperalgesic medication but the modalities of administration and the doses varied greatly and were not in accordance with the guidelines. Despite the lack of evidence and guidelines, ketamine has also been used to treat acute and chronic pain. Doses, duration and localization of the patients during administration have varied greatly. Psychedelic effects and hallucinations are the most feared side effects. In terms of monitoring during ketamine infusion, 15% of physicians declared that no monitoring was necessary while 59%, 55%, 59% and 77% monitored heart rate, SpO 2 , blood pressure and level of consciousness, respectively. Conclusion Anaesthesiologists have integrated the benefit of ketamine in preventing hyperalgesia but there is no consensus on doses and duration. For other indications (acute and chronic pain treatment), toxicity and the absence of significant benefit call for guidelines from scientific societies. [ABSTRACT FROM AUTHOR]

Background: Little is known about postdischarge healthcare resource use (HCU) among patients hospitalized for coronavirus disease 2019 (COVID-19). The objective was to identify distinct profiles of patients based on postdischarge cares., Methods: This was a retrospective cohort study using the French National Health System claims database. We followed up all patients hospitalized for COVID-19 between 2020/02/01 and 2020/06/30 for 6 months; the discharge date was the index date. We excluded patients who died during the index stay or within 30 days after discharge. We described patients' HCU over 5 months from day 31 after the index date to the end of follow-up, i.e., the post-COVID-19 period. We described the sociodemographic and clinical characteristics of the participants and 44 selected types of HCU, including medical and emergency room visits, medications, medical and biological tests, oxygen therapy, rehabilitation, rehospitalization, nurse visits, and sick leave. We performed Ward's ascendant hierarchical clustering (AHC) analysis to identify groups of patients with similar post-COVID-19 HCU and described HCU and clinical characteristics by cluster., Results: The study population included 68,822 patients (median age: 64.8 years, 47% women). Eight clusters of patients were identified, each comprising between 1,163 and 35,501 patients. Four clusters were characterized by older patients and high proportions of comorbidities, i.e. cancer (cluster 3), mental disorders (cluster 4), cardiac insufficiency (cluster 5) and respiratory failure (cluster 6). Cluster 8 was characterized by younger patients, often obese and with low mortality. Another cluster was characterized by complex index stays (cluster 7) and a last cluster (cluster 2) by specific medical contacts and therapy. The main cluster (cluster 1, n = 35,501) was similar to the overall study population. The duration and complexity of the index stay also varied across clusters., Conclusions: Based on HCU data, AHC identified 8 clinically relevant profiles of patients surviving the acute episode of COVID-19 hospitalization. The clusters illustrate the many impacts of COVID on the health status of infected patients and may help anticipate future needs of care in a similar context., Competing Interests: Declarations. Ethics approval and consent to participate: This study was approved by the ethic committee of the French Health Data Hub (no. 4653731, 2021/07/08). It was conducted using anonymized data and approved by the ethics committee of the National Informatics and Liberty Committee (CNIL, no. 921290, 2021/07/19). This study was registered on clinicaltrials.gov under the number NCT05073328. The data used were secondary data from the French healthcare claims database (SNDS). This is an anonymized database; thus we did not have access to patients to request their consent to participate. However, the persons concerned wishing to assert their rights should make a request to their health insurance to attachment (CPAM), in accordance with article 111 of the implementing decree of the Data Protection Act ( https://www.snds.gouv.fr/SNDS/Protection-de-la - donnee). Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)