Integrating Buprenorphine for Opioid Use Disorder into Rural, Primary Care Settings.

BACKGROUND: Medications for opioid use disorder (MOUD) including buprenorphine are effective, but underutilized. Rural patients experience pronounced disparities in access. To reach rural patients, the US Department of Veterans Affairs (VA) has sought to expand buprenorphine prescribing beyond specialty settings and into primary care. OBJECTIVE: Although challenges remain, some rural VA health care systems have begun offering opioid use disorder (OUD) treatment with buprenorphine in primary care. We conducted interviews with clinicians, leaders, and staff within these systems to understand how this outcome had been achieved. DESIGN: Using administrative data from the VA Corporate Data Warehouse (CDW), we identified rural VA health care systems that had improved their rate of primary care-based buprenorphine prescribing over the period 2015-2020. We conducted qualitative interviews (n = 30) with staff involved in implementing or prescribing buprenorphine in these systems to understand the processes that had facilitated implementation. PARTICIPANTS: Clinicians, staff, and leaders embedded within rural VA health care systems located in the Northwest, West, Midwest (2), South, and Northeast. APPROACH: Qualitative interviews were analyzed using a mixed inductive/deductive approach. KEY RESULTS: Interviews revealed the processes through which buprenorphine was integrated into primary care, as well as processes insufficient to enact change. Implementation was often initially catalyzed through a targeted hire. Champions then engaged clinicians and leaders one-on-one to "pitch" the case, describe concordance between buprenorphine prescribing and existing goals, and delineate the supportive role that they could provide. Sites were prepared for implementation by developing new clinical teams and redesigning clinical processes. Each of these processes was made possible with the active, instrumental support of leadership. CONCLUSIONS: Results suggest that rural systems seeking to improve buprenorphine accessibility in primary care may need to alter primary care structures to accommodate buprenorphine prescribing, whether through new hires, team development, or clinical redesign.

"They Ask Questions, But They Don't Want the Answers"-Perceptions of Clinical Communication Among Veterans Discontinuing Buprenorphine for the Treatment of Opioid Use Disorder.

BACKGROUND: Many patients with opioid use disorder (OUD) discontinue treatment prematurely, increasing their risk of opioid-related overdose and death. While patient-centered care is considered the gold standard in treating chronic illness, it may be practiced less frequently in the context of OUD care. Patient-provider communication can influence patients' care experiences, potentially having an impact on treatment retention and care decision-making. METHODS: This study was conducted at the VA Portland Health Care System from March 2021 to April 2022. We conducted qualitive interviews with patients who had discontinued buprenorphine for the treatment of OUD within the past year. Coding and analysis were guided by inductive qualitative content analysis. Retrospective medical record review identified clinical and demographic characteristics of participants. RESULTS: Twenty patients completed an interview. Participant age ranged from 28 to 74 years (median 63 years). Ninety percent of participants were white and 90% male. Many participants expressed frustration and feelings of disempowerment in OUD care processes. Patients with a history of long-term prescribed opioid use frequently expressed stigmatizing views of OUD, and perceptions of disagreement with providers over diagnosis and care choices. Elderly patients and those with multiple comorbidities expressed confusion over significant aspects of their care, as well as difficulty navigating treatment logistics like appointment requirements and medication dose changes. Some patients reported later restarting buprenorphine in new settings, and described feeling respected and involved in care decisions as a facilitator for continuing treatment. CONCLUSIONS: Prioritizing patient-centered communication in OUD treatment could improve the patient experience and potentially support treatment retention. Subgroups of OUD patients, such as those with a history of long-term prescribed opioid use, elderly patients with multiple comorbidities, or those who express stigmatizing medication views, could particularly benefit from tailored communication strategies that address their individual concerns.

Patients' Perspectives on Discontinuing Buprenorphine for the Treatment of Opioid Use Disorder.

OBJECTIVES: Buprenorphine and other medications for opioid use disorder (OUD) are recommended as standard of care in the treatment of OUD and are associated with positive health and addiction-related outcomes. Despite benefits, discontinuation is common, with half of patients discontinuing in the first year of treatment. Addressing OUD is a major clinical priority, yet little is known about the causes of medication discontinuation from the patient perspective. METHODS: From March 2021 to April 2022, we conducted qualitative interviews with patients who had discontinued buprenorphine for the treatment of OUD within the past 12 months. Eligible participants were selected from 2 Veterans Health Administration Health Care Systems in Oregon. Coding and analysis were guided by conventional qualitative content analysis. RESULTS: Twenty participants completed an interview; 90% were White and 90% were male, and the mean age was 54.2 years. Before discontinuation, participants had received buprenorphine for 8.3 months on average (range, 1-40 months); 80% had received buprenorphine for less than 12 months. Qualitative analysis identified the following themes relating to discontinuation: health system barriers (eg, logistical hurdles, rules and policy violations), medication effects (adverse effects; attributed adverse effects, lack of efficacy in treating chronic pain) and desire for opioid use. Patient description of decisions to discontinue buprenorphine could be multicausal, reflecting provider or system-level barriers in interaction with patient complexity or medication ambivalence. CONCLUSIONS: Study results identify several actionable ways OUD treatment could be modified to enhance patient retention.

Improving access to buprenorphine for rural veterans in a learning health care system.

OBJECTIVE: To describe a learning health care system research process designed to increase buprenorphine prescribing for the treatment of opioid use disorder (OUD) in rural primary care settings within U.S. Department of Veterans Affairs (VA) treatment facilities. DATA SOURCES AND STUDY SETTING: Using national administrative data from the VA Corporate Data Warehouse, we identified six rural VA health care systems that had improved their rate of buprenorphine prescribing within primary care from 2015 to 2020 (positive deviants). We conducted qualitative interviews with leaders, clinicians, and staff involved in buprenorphine prescribing within primary care from these sites to inform the design of an implementation strategy. STUDY DESIGN: Qualitative interviews to inform implementation strategy development. DATA COLLECTION/EXTRACTION METHODS: Interviews were audio-recorded, transcribed verbatim, and coded by a primary coder and secondary reviewer. Analysis utilized a mixed inductive/deductive approach. To develop an implementation strategy, we matched clinical needs identified within interviews with resources and strategies participants had utilized to address these needs in their own sites. PRINCIPAL FINDINGS: Interview participants (n = 30) identified key clinical needs and strategies for implementing buprenorphine in rural, primary care settings. Common suggestions included the need for clinical mentorship or a consult service, buprenorphine training, and educational resources. Building upon interview findings and in partnership with a clinical team, we developed an implementation strategy composed of an engaging case-based training, an audit and feedback process, and educational resources (e.g., Buprenorphine Frequently Asked Questions, Rural Care Model Infographic). CONCLUSIONS: We describe a learning health care system research process that leveraged national administrative data, health care provider interviews, and clinical partnership to develop an implementation strategy to encourage buprenorphine prescribing in rural primary care settings.

Ecological consequences of scaling of chew cycle duration and daily feeding time in primates.

Feeding systems and behaviors must evolve to satisfy the metabolic needs of organisms. This includes modifications to feeding systems as body size and metabolic needs change. Using our own data and data from the literature, we examine how size-related changes in metabolic needs are met by size-related changes in daily feeding time, chew cycle duration, volume of food processed per chew, and daily food volume intake in primates. Increases in chew cycle duration with body mass in haplorhine primates are described by a simple power function (cycle time alpha body mass(0.181)). Daily feeding time increases with body mass when analyzed using raw data from the "tips" of the primate phylogenetic tree, but not when using phylogenetically independent contrasts. Whether or not daily feeding time remains constant or increases with body mass, isometry of ingested bite size and the slow rate of increase in chew cycle time with body size combine to allow daily ingested food volume to scale faster than predicted by metabolic rate. This positive allometry of daily ingested food volume may compensate for negative allometry of nutrient concentration in primate foods. Food material properties such as toughness and hardness have little impact on scaling of chew cycle durations, sequence durations, or numbers of chews in a sequence. Size-related changes in food processing abilities appear to accommodate size-related changes in food material properties, and primates may alter ingested bite sizes in order to minimize the impacts of food material properties on temporal variables such as chew cycle duration and chew sequence duration.

Scaling of chew cycle duration in primates.

The biomechanical determinants of the scaling of chew cycle duration are important components of models of primate feeding systems at all levels, from the neuromechanical to the ecological. Chew cycle durations were estimated in 35 species of primates and analyzed in conjunction with data on morphological variables of the feeding system estimating moment of inertia of the mandible and force production capacity of the chewing muscles. Data on scaling of primate chew cycle duration were compared with the predictions of simple pendulum and forced mass-spring system models of the feeding system. The gravity-driven pendulum model best predicts the observed cycle duration scaling but is rejected as biomechanically unrealistic. The forced mass-spring model predicts larger increases in chew cycle duration with size than observed, but provides reasonable predictions of cycle duration scaling. We hypothesize that intrinsic properties of the muscles predict spring-like behavior of the jaw elevator muscles during opening and fast close phases of the jaw cycle and that modulation of stiffness by the central nervous system leads to spring-like properties during the slow close/power stroke phase. Strepsirrhines show no predictable relationship between chew cycle duration and jaw length. Anthropoids have longer chew cycle durations than nonprimate mammals with similar mandible lengths, possibly due to their enlarged symphyses, which increase the moment of inertia of the mandible. Deviations from general scaling trends suggest that both scaling of the jaw muscles and the inertial properties of the mandible are important in determining the scaling of chew cycle duration in primates.

Modulation of intra-oral processing in mammals and lepidosaurs.

The mammalian masticatory apparatus is distinguished from the intra-oral processing systems of other amniotes by a number of morphological and functional features, including transverse movements of the teeth during the power stroke, precise occlusion, suspension of the teeth in the socket by a periodontal ligament, diphyodonty (reduction to two generations of teeth), a hard palate, and the presence of a single bone (the dentary) in the lower jaw which articulates with the skull at the temporomandibular jaw joint. The evolution of these features is commonly argued to have improved the efficiency of food processing in the oral cavity. The present aricle highlights the existence in mammals of the fusimotor system and afferent fibers from the periodontal ligament through which the CNS modulates the responses by the muscle spindles. Published data suggest that the fusimotor system and the periodontal afferents are important components in feed-forward (or anticipatory) control of chewing behavior. We hypothesize that this feed-forward control is used to maintain relatively constant cycle lengths in mammals in the face of intra-sequence and inter-sequence variation in material properties of the food, and that this enables them to maintain a higher average chewing frequency than that of lizards. These predictions were evaluated using data on mean cycle length and its variance from the literature and from our own files. On average, mammals have less variable cycle lengths than do lizards and shorter cycle lengths than do lizards of similar size. We hypothesize that by decreasing variance in cycle length, presumably close to the natural frequency of their feeding systems, mammals minimize energy expenditure during chewing, allowing them to chew for longer, thereby maintaining the high rates of food intake required for their high metabolic rates.