Palliative Care Clinical Studies Collaborative (PaCCSC) - Collected Works
Permanent URI for this collection
Browsing Palliative Care Clinical Studies Collaborative (PaCCSC) - Collected Works by Author "Bull, Janet"
Now showing 1 - 2 of 2
Results Per Page
ItemThe longitudinal pattern of response when morphine is used to treat chronic refractory dyspnea(Mary Ann Liebert, Inc., 2013-07-22) Currow, David Christopher ; Quinn, Stephen ; Greene, Aine ; Bull, Janet ; Johnson, Miriam J ; Abernethy, Amy PickarBackground: While evidence supports using sustained release morphine for chronic refractory breathlessness, little is known about the longitudinal pattern of breathlessness intensity as people achieve symptomatic benefit. The aim of this study is to describe this pattern. Methods: This secondary analysis used breathlessness intensity scores (100mm visual analogue scale (VAS)) from a prospective, dose increment study of once daily (morning) sustained release morphine for chronic refractory breathlessness. Participants who achieved < 10% improvement over their own baseline at one week (10 mg) were titrated to 20mg and if no response, another week later to 30mg for one week. Time was standardized at the first day of the week in which participants responded generating twice daily data one week either side of symptomatic benefit. Analysis used random effect mixed modeling. Results: Of the 83 participants, 17/52 responders required > 10 mg: 13 participants (20 mg) and 4 (30 mg), contributing 634 VAS observations. In the week leading to a response, average VAS scores worsened by 0.3mm/ day ( p = 0.16); the average improvement in the first 24 hours of response was 10.9mm (7.0 to 14.7; p < 0.0001), with continued improvement of 2.2 mm/day ( p < 0.001) for six more days. Conclusion: When treating chronic refractory breathlessness with once daily sustained release morphine, titrate to effect, since inadequate dose may generate no response; and following an initial response, further dose increases should not occur for at least one week. Whether further benefit would be derived beyond day six on the dose to which people respond, and what net effect a further dose increase would have are questions yet to be answered.
ItemA strategy to advance the evidence base in palliative medicine: formation of a palliative care research cooperative group(Mary Ann Liebert, Inc., 2010-11-24) Abernethy, Amy Pickar ; Aziz, Noreen M ; Basch, Ethan ; Bull, Janet ; Cleeland, Charles S ; Currow, David Christopher ; Fairclough, Diane ; Hanson, Laura ; Hauser, Joshua ; Ko, Danielle N ; Lloyd, Linda ; Morrison, R Sean ; Otis-Green, Shirley ; Pantilat, Steve ; Portenoy, Russell K ; Ritchie, Christine ; Rocker, Graeme ; Wheeler, Jane L ; Zafar, S Yousuf ; Kutner, Jean SBackground: Palliative medicine has made rapid progress in establishing its scientific and clinical legitimacy, yet the evidence base to support clinical practice remains deficient in both the quantity and quality of published studies. Historically, the conduct of research in palliative care populations has been impeded by multiple barriers including health care system fragmentation, small number and size of potential sites for recruitment, vulnerability of the population, perceptions of inappropriateness, ethical concerns, and gate-keeping. Methods: A group of experienced investigators with backgrounds in palliative care research convened to consider developing a research cooperative group as a mechanism for generating high-quality evidence on prioritized, clinically relevant topics in palliative care. Results: The resulting Palliative Care Research Cooperative (PCRC) agreed on a set of core principles: active, interdisciplinary membership; commitment to shared research purposes; heterogeneity of participating sites; development of research capacity in participating sites; standardization of methodologies, such as consenting and data collection/management; agile response to research requests from government, industry, and investigators; focus on translation; education and training of future palliative care researchers; actionable results that can inform clinical practice and policy. Consensus was achieved on a first collaborative study, a randomized clinical trial of statin discontinuation versus continuation in patients with a prognosis of less than 6 months who are taking statins for primary or secondary prevention. This article describes the formation of the PCRC, highlighting processes and decisions taken to optimize the cooperative group's success.