Safety assessment of underground vehicles passing over highly resilient curved tracks in the presence of a broken rail

Vehicle–track interaction for a new resilient slab track designed to reduce noise and vibration levels was analysed, in order to assess the derailment risk on a curved track when encountering a broken rail. Sensitivity of the rail support spacing of the relative position of the rail breakage between two adjacent rail supports and of running speed were analysed for two different elasticities of the rail fastening system. In none of the cases analysed was observed an appreciable difference between either of the elastic systems. As was expected, the most unfavourable situations were those with greater rail support spacing and those with greater distance from the breakage to the nearest rail support, although in none of the simulations performed did a derailment occur when running over the broken rail. When varying the running speed, the most favourable condition was obtained for an intermediate speed, due to the superposition of two antagonistic effects

Coercion During Psychiatric Ambulance Versus Police Transport in Mental Health Crises:A Pre- and Postimplementation Study

OBJECTIVE: Police officers are often the first responders when individuals experience a mental health crisis and typically remain responsible for transport to a psychiatric emergency department. In 2014, a psychiatric ambulance (PA) was introduced in the city of Amsterdam to take over the transport of individuals in a mental health crisis. The purpose of the PA was to use fewer restrictive measures while guaranteeing safety for both patients and personnel. METHODS: A preimplementation-postimplementation design was used to assess the feasibility and utility of a single-vehicle PA service compared with police transport. Data on 498 rides were collected in the 4 months before implementation of the PA (pre-PA cohort) and on 655 rides in the 6 months after implementation (PA cohort). RESULTS: After PA implementation, most patients were transported by the PA (82%), and rides by police vehicle were very rare (1%). Individuals in the PA cohort had a greater transportation delay, compared with those in the pre-PA cohort, but the PA reduced use of coercive measures with no increase in the incidence of patient aggression. Among individuals in the PA cohort, hospitalization was more often voluntary than among those in the pre-PA cohort. CONCLUSIONS: Transporting emergency psychiatric patients by a special PA rather than by the police reduced the use of coercive measures during transport, kept the occurrence of aggressive incidents stable, and was associated with fewer coercive hospital admissions.</p

Suicide risk, personality disorder and hospital admission after assessment by psychiatric emergency services

Background: The main objectives of the mobile Psychiatric Emergency Services (PES) in the Netherlands are to assess the presence of a mental disorder, to estimate risk to self or others, and to initiate continuity of care, including psychiatric hospital admission. The aim of this study was to assess the associations between the level of suicidality and risk of voluntary or involuntary admission in patients with and without a personality disorder who were presented to mobile PES. Methods: Observational data were obtained in three areas of the Netherlands from 2007 to 2016. In total, we included 71,707 contacts of patients aged 18 to 65 years. The outcome variable was voluntary or involuntary psychiatric admission. Suicide risk and personality disorder were assessed by PES-clinicians. Multivariable regression analysis was used to explore associations between suicide risk, personality disorder, and voluntary or involuntary admission. Results: Independently of the level of suicide risk, suicidal patients diagnosed with personality disorder were less likely to be admitted voluntarily than those without such a diagnosis (admission rate .37 versus .46 respectively). However, when the level of suicide risk was moderate or high, those with a personality disorder who were admitted involuntarily had the same probability of involuntary admission as those without such a disorder. Conclusions: While the probability of voluntary admission was lower in those diagnosed with a personality disorder, independent of the level of suicidality, the probability of involuntary admission was only lower in those whose risk of suicide was low. Future longitudinal studies should investigate the associations between (involuntary) admission and course of suicidality in personality disorder