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Supplemental material, sj-docx-1-cet-10.1177_14777509231156050 for Justifying non-violent resistance: The perspectives of healthcare workers by Ryan Essex, Hil Aked, Rebecca Daniels, Paul Newton and Sharon M. Weldon in Clinical Ethics

Background Non-violent resistance which has involved healthcare workers has been instrumental in securing a number of health-related gains and a force in opposing threats to health. Despite this, we know little about healthcare workers who have engaged in acts of non-violent resistance. Research aim Amongst a sample of healthcare workers who had engaged in acts of resistance this study sought to explore their understanding of non-violent resistance and how or whether they felt healthcare workers made a distinct contribution to such action. Research design Cross-sectional survey Participants and research context Healthcare workers (doctors, nurses, academics and others) from the UK and Europe who had engaged in acts of non-violent resistance. Ethical considerations Ethical approval for this study was granted by the University of Greenwich Human Research Ethics Committee (UREC/20.5.6.11). Findings/results Most participants spoke about the nature of non-violent resistance, its oppositional, didactic and symbolic functions and the role of violence or harm. While most people understood non-violent resistance as a public, oppositional and collective act, many identified more subtle everyday acts in the workplace that undermined policy or procedures they saw as harmful. When asked about distinctions in non-violent resistance carried out by healthcare workers, most participants referred to their standing in society, noting that healthcare works were a trusted and authoritative source. Some identified an ethical imperative to act while others identified the risks that came with such action, noting their accountability and responsibility they had to patients. About a quarter of participants felt that such action was no different to others carrying out non-violent resistance or dependent on the issue or nature of the action. Conclusions These findings speak to the complex and multifaceted nature of non-violent resistance. Additionally our findings suggest healthcare workers have a distinct role to play in leading and supporting non-violent actions.

Supplemental Material for Exploring the concept of non-violent resistance amongst healthcare workers by Ryan Essex, Hil Aked, Rebecca Daniels, Paul Newton and Sharon Weldon in Nursing Ethics

Despite strong suspicion that abnormal Ca(2+) handling in Purkinje cells (P-cells) is implicated in life-threatening forms of ventricular tachycardias, the mechanism underlying the Ca(2+) cycling of these cells under normal conditions is still unclear. There is mounting evidence that P-cells have a unique Ca(2+) handling system. Notably complex spontaneous Ca(2+) activity was previously recorded in canine P-cells and was explained by a mechanistic hypothesis involving a triple layered system of Ca(2+) release channels. Here we examined the validity of this hypothesis for the electrically evoked Ca(2+) transient which was shown, in the dog and rabbit, to occur progressively from the periphery to the interior of the cell. To do so, the hypothesis was incorporated in a model of intracellular Ca(2+) dynamics which was then used to reproduce numerically the Ca(2+) activity of P-cells under stimulated conditions. The modelling was thus performed through a 2D computational array that encompassed three distinct Ca(2+) release nodes arranged, respectively, into three consecutive adjacent regions. A system of partial differential equations (PDEs) expressed numerically the principal cellular functions that modulate the local cytosolic Ca(2+) concentration (Cai). The apparent node-to-node progression of elevated Cai was obtained by combining Ca(2+) diffusion and 'Ca(2+)-induced Ca(2+) release'. To provide the modelling with a reliable experimental reference, we first re-examined the Ca(2+) mobilization in swine stimulated P-cells by 2D confocal microscopy. As reported earlier for the dog and rabbit, a centripetal Ca(2+) transient was readily visible in 22 stimulated P-cells from six adult Yucatan swine hearts (pacing rate: 0.1 Hz; pulse duration: 25 ms, pulse amplitude: 10% above threshold; 1 mm Ca(2+); 35°C; pH 7.3). An accurate replication of the observed centripetal Ca(2+) propagation was generated by the model for four representative cell examples and confirmed by statistical comparisons of simulations against cell data. Selective inactivation of Ca(2+) release regions of the computational array showed that an intermediate layer of Ca(2+) release nodes with an ~30-40% lower Ca(2+) activation threshold was required to reproduce the phenomenon. Our computational analysis was therefore fully consistent with the activation of a triple layered system of Ca(2+) release channels as a mechanism of centripetal Ca(2+) signalling in P-cells. Moreover, the model clearly indicated that the intermediate Ca(2+) release layer with increased sensitivity for Ca(2+) plays an important role in the specific intracellular Ca(2+) mobilization of Purkinje fibres and could therefore be a relevant determinant of cardiac conduction.