Pulmonary Microwave Ablation Near the Heart: Antenna Positioning Can Mitigate Cardiac Complications in a Porcine Model.

Purpose To determine how close to the heart pulmonary microwave ablation can be performed without causing cardiac tissue injury or significant arrhythmia. Materials and Methods The study was performed with approval from the institutional animal care and use committee. Computed tomographic fluoroscopically guided microwave ablation of the lung was performed in 12 swine. Antennas were randomized to either parallel (180° ± 20°) or perpendicular (90° ± 20°) orientation relative to the heart surface and to distances of 0-10 mm from the heart. Ablations were performed at 65 W for 5 minutes or until a significant arrhythmia (asystole, heart block, bradycardia, supraventricular or ventricular tachycardia) developed. Heart tissue was evaluated with vital staining and histologic examination. Data were analyzed with mixed effects logistic regression, receiver operating characteristic curves, and the Fisher exact test. Results Thirty-four pulmonary microwave ablations were performed with the antenna a median distance of 4 mm from the heart in both perpendicular (n = 17) and parallel (n = 17) orientation. Significant arrhythmias developed during six (18%) ablations. Cardiac tissue injury occurred with 17 ablations (50%). Risk of arrhythmia and tissue injury decreased with increasing antenna distance from the heart with both antenna orientations. No cardiac complication occurred with a distance of greater than or equal to 4.4 mm from the heart. The ablation zone extended to the pleural surface adjacent to the heart in 71% of parallel and 17% of perpendicular ablations performed 5-10 mm from the heart. Conclusion Microwave lung ablations performed more than or equal to 5 mm from the heart were associated with a low risk of cardiac complications. © RSNA, 2016.

African American women's experiences of menopause: A focus group study.

OBJECTIVES: This study aimed to characterize African American women's experiences of menopause and their interactions with the health care system related to menopausal symptoms. STUDY DESIGN: We conducted four focus groups with community-dwelling midlife African American women. MAIN OUTCOMES MEASURES: Women who consented to participate completed demographic surveys. Transcripts of the four focus groups (n = 26) were analyzed and themes were elucidated. RESULTS: In total, 26 midlife African American women participated in the four focus groups. Participants revealed unmet needs regarding obtaining menopause information from their clinicians. Clinician discussions about menopause tended to be initiated by patients based on their symptoms. Some women reported feeling ignored and/or dismissed by the clinician when they initiated discussions of menopause. Women wanted their clinicians to provide information on menopause, which included receiving information prior to the menopause transition to help them know what to expect. CONCLUSION: Women wanted their clinicians to initiate discussions of menopause rather than wait for women to mention symptoms. Prioritizing menopause training for clinicians taking care of midlife African American women may help to improve discussions of menopause.

Promoting research engagement among women with addiction: Impact of recovery peer support in a pilot randomized mixed-methods study.

OBJECTIVE: The impact of involving peers on research engagement is largely unknown. The purpose of this pilot study, a part of a larger research, was to evaluate the impact of recovery peer involvement as a study team member on recruitment/retention of persons with lived experience of SUD during pregnancy and to assess participant perceptions about factors impacting engagement of this population and their children in research, especially brain magnetic resonance imaging (MRI). METHODS: This study randomly assigned participants (1:1) to either Peer or Research Coordinator (RC) arms. Eligible participants were English-speaking adult, non-pregnant females with lived experience of substance use during pregnancy. Certified Peers were recruited word of mouth and completed study-specific training. The impact of trained, certified Peer versus RC on research engagement was assessed by between-arm comparison of retention rates. Quantitative and qualitative survey data on participant perceptions were summarized. RESULTS: Thirty-eight individuals enrolled into the study (19 Peer, 19 RC). Peer versus RC had 7.2 times greater odds of completing Visit 2 (Fisher's exact test; 95%CI: 1.2, 81.8; p = 0.03). The majority (70.4%) of respondents identified being accompanied by a peer and getting a tour of the MRI facility/procedures as 'extremely' helpful for improving participant comfort and engagement in future studies. Motivators of future research engagement also included creating a trusting, supportive, non-judgmental research environment, and linkages to treatment and other services. CONCLUSION: Findings support the notion that peers involved as research team members could boost research engagement among persons with substance use during pregnancy.

Recruitment and retention of pregnant women in prospective birth cohort studies: A scoping review and content analysis of the literature.

Longitudinal cohort studies present unique methodological challenges, especially when they focus on vulnerable populations, such as pregnant women. The purpose of this review is to synthesize the existing knowledge on recruitment and retention (RR) of pregnant women in birth cohort studies and to make recommendations for researchers to improve research engagement of this population. A scoping review and content analysis were conducted to identify facilitators and barriers to the RR of pregnant women in cohort studies. The search retrieved 574 articles, with 38 meeting eligibility criteria and focused on RR among English-speaking, adult women, who are pregnant or in early postpartum period, enrolled in birth cohort studies. Selected studies were birth cohort (including longitudinal) (n = 20), feasibility (n = 14), and other (n = 4) non-interventional study designs. The majority were from low-risk populations. Abstracted data were coded according to emergent theme clusters. The majority of abstracted data (79%) focused on recruitment practices, with only 21% addressing retention strategies. Overall, facilitators were reported more often (75%) than barriers (25%). Building trusting relationships and employing diverse recruitment methods emerged as major recruitment facilitators; major barriers included heterogeneous participant reasons for refusal and cultural factors. Key retention facilitators included flexibility with scheduling, frequent communication, and culturally sensitive practices, whereas participant factors such as loss of interest, pregnancy loss, relocation, multiple caregiver shifts, and substance use/psychiatric problems were cited as major barriers. Better understanding of facilitators and barriers of RR can help enhance the internal and external validity of future birth/pre-birth cohorts. Strategies presented in this review can help inform investigators and funding agencies of best practices for RR of pregnant women in longitudinal studies.

A socioecological framework for engaging substance-using pregnant persons in longitudinal research: Multi-stakeholder perspectives.

OBJECTIVE: Understanding the impact of substance use during pregnancy on fetal development and child health is essential for designing effective approaches for reducing prenatal substance exposures and improving child outcomes. Research on the developmental impacts of prenatal substance exposure has been limited by legal, ethical, and practical challenges. This study examined approaches to engage substance-using (with an emphasis on opioids) pregnant persons in longitudinal research, from multi-stakeholder perspectives. METHODS: The present study solicited the expertise of 1) an advisory group of community stakeholders, including people with lived experienced of opioid/substance use; and 2) an online survey with content experts. Qualitative analysis examined facilitators and barriers to recruiting and retaining substance-using pregnant persons through a socioecological lens at the individual, interpersonal, organizational, community, and policy levels. RESULTS: Stakeholders (N = 19) prioritized stigma, loss of confidentiality, legal consequences, and instability (e.g., homelessness and poverty) as important barriers that prevent substance-using persons from enrolling in research studies. Of 70 survey respondents, most self-identified as researchers (n = 37), followed by clinicians (n = 19), and 'others' (n = 14). Survey respondents focused on retention strategies that build trusting relationships with participants, including incentives (e.g., transportation and childcare support), participant-friendly study design, and team-related factors, (e.g., attitudes and practices). CONCLUSION: The stakeholder input and survey data offer key insights strengthening our understanding of facilitators and barriers to research participation, and ways to overcome barriers among substance-using pregnant persons. A socioecological framework can be used to identify and address these factors to increase recruitment and long-term retention of high-risk populations.