Effects of acetate on cerebral blood flow, systemic inflammation, and behavior in alcohol use disorder.

BACKGROUND: Alcohol use disorders (AUDs) are associated with altered regulation of physiological processes in the brain. Acetate, a metabolite of ethanol, has been implicated in several processes that are disrupted in AUDs including transcriptional regulation, metabolism, inflammation, and neurotransmission. To further understand the effects of acetate on brain function in AUDs, we investigated the effects of acetate on cerebral blood flow (CBF), systemic inflammatory cytokines, and behavior in AUD. METHODS: Sixteen participants with AUD were recruited from a nonmedical, clinically managed detoxification center. Each participant received acetate and placebo in a randomly assigned order of infusion and underwent 3T MR scanning using quantitative pseudo-continuous arterial spin labeling. Participants and the study team were blinded to the infusion. CBF values (ml/100 g/min) extracted from thalamus were compared between placebo and acetate using a mixed effect linear regression model accounting for infusion order. Voxel-wise CBF comparisons were set at threshold of p < 0.05 cluster-corrected for multiple comparisons, voxel-level p < 0.0001. Plasma cytokine levels and behavior were also assessed between infusions. RESULTS: Fifteen men and 1 woman were enrolled with Alcohol Use Disorders Identification Test (AUDIT) scores between 13 and 38 with a mean of 28.3 ± 9.1. Compared to placebo, acetate administration increased CBF in the thalamus bilaterally (Left: 51.2 vs. 68.8, p < 0.001; Right: 53.7 vs. 69.6, p = 0.001), as well as the cerebellum, brainstem, and cortex. Older age and higher AUDIT scores were associated with increases in acetate-induced thalamic blood flow. Cytokine levels and behavioral measures did not differ between placebo and acetate infusions. CONCLUSIONS: This pilot study in AUD suggests that during the first week of abstinence from alcohol, the brain's response to acetate differs by brain region and this response may be associated with the severity of alcohol dependence.

Teleconsultation improves primary care clinicians' confidence about caring for HIV.

BACKGROUND: Telemedicine can facilitate communication between primary care clinicians and specialists. Generalists who use telemedicine for consultation (teleconsultation) may be able to practice more independently and reduce the number of formal referrals to specialists. In the United States, a federally funded human immunodeficiency virus (HIV) teleconsultation service (HIV Warmline) offers clinicians live telephone access to HIV specialists; however, its impact on clinicians' self-perceived clinical competence and referral rates has not been studied. OBJECTIVE: To determine if primary care clinicians who used the HIV Warmline felt more capable of managing HIV in their own practices. DESIGN: Online survey. PARTICIPANTS: Primary care physicians and mid-level practitioners who used the HIV Warmline for teleconsultation between 1/2008 and 3/2010. MAIN MEASURES: Participants compared the HIV Warmline to other methods of obtaining HIV clinical support, and then rated its impact on their confidence in their HIV skills and their referral patterns. KEY RESULTS: Respondents (N = 191, 59% response rate) found the HIV Warmline to be quicker (65%), more applicable (70%), and more trustworthy (57%) than other sources of HIV information. After using the HIV Warmline, 90% had improved confidence about caring for HIV, 67% stated it changed the way they managed HIV, and 74% were able to avoid referring patients to specialists. All valued the availability of live, free consultation. CONCLUSIONS: Primary care clinicians who called the HIV Warmline reported increased confidence in their HIV care and less need to refer patients to specialists. Teleconsultation may be a powerful tool to help consolidate HIV care in the primary care setting, and could be adapted for use with a variety of other medical conditions. The direct impact of teleconsultation on actual referral rates, quality of care and clinical outcomes needs to be studied.

Health care provider satisfaction with telephone consultations provided by pharmacists and physicians at the National HIV/AIDS Clinicians' Consultation Center.

BACKGROUND: The federally funded National HIV/AIDS Clinicians' Consultation Center (NCCC) offers US health care providers expert telephone consultations for managing HIV/AIDS and occupational exposures to blood-borne pathogens through 3 telephone services: the National Clinicians' Post-Exposure Prophylaxis Hotline (PEPline), the National HIV Telephone Consultation Service (Warmline), and the Perinatal HIV Hotline. Callers to the NCCC receive consultation from either a clinical pharmacist (PharmD) or a physician (MD) with HIV expertise. OBJECTIVE: To compare the satisfaction of NCCC callers who received clinical consultations from clinical pharmacists and physicians with HIV expertise. METHODS: We prospectively mailed 1256 satisfaction surveys to NCCC health care provider callers during a 7-month period. Survey recipients were not aware that satisfaction surveys compared PharmD and MD consultation services. Respondents rated their level of agreement with 8 statements about the quality of consultation, the quality of clinical information given, and future calls to the NCCC. RESULTS: Survey return rates were 43% for PEPline and 40% for Warmline and Perinatal HIV Hotline combined. Overall, caller satisfaction with the telephone consultation service was extremely high (>4 in all categories on a 1-5 Likert scale). There was no significant difference in PEPline caller satisfaction ratings between PharmD and MD consultations. Callers to the Warmline and Perinatal HIV Hotline agreed with all 8 satisfaction statements. For the following 3 statements, however, satisfaction was higher when Warmline and Perinatal HIV Hotline consultation was provided by an MD: "Overall, I was pleased with the quality of my consultation" (p = 0.04); "I would use this service again" (p < 0.02); and "I am likely to recommend this service to my colleagues" (p = 0.02). CONCLUSIONS: Health care provider callers to the NCCC were highly satisfied with the information obtained from this HIV/AIDS telephone consultation service. By measuring callers' survey response to PharmD and MD consultations, the importance of the clinicians' contributions to this advanced HIV/AIDS consultation service is documented.

Teleconsultation for clinicians who provide human immunodeficiency virus care: experience of the national HIV telephone consultation service.

OBJECTIVE: To examine the infrastructure, successes, and challenges of a teleconsultation service for human immunodeficiency virus (HIV) clinicians. MATERIALS AND METHODS: The HIV Warmline is a telephone consultation service providing free, live HIV/AIDS management advice to U.S. clinicians. We present descriptive data about callers, patients, and consultation topics gathered by electronic query of the HIV Warmline database for 2009. Caller satisfaction survey results for 2009 are also presented. RESULTS: The HIV Warmline has provided more than 37,000 consultations since its inception in 1992. The service provides consultations to clinicians from all 50 states, from a variety of professional backgrounds, and with a wide range of HIV experience levels. The majority of call topics concern antiretroviral therapy. Callers are generally pleased with the service, giving a mean Likert scale rating of 4.7 on satisfaction survey questions. CONCLUSION: The experience of the HIV Warmline can serve as a model for other programs planning to develop remote consultation systems. HIV teleconsultation has been relatively simple to implement and can be useful for many types of clinicians. HIV teleconsultation should continue to be evaluated as a way to improve HIV care, especially in areas without easy access to HIV expertise.

Final results of the Lung Screening Study, a randomized feasibility study of spiral CT versus chest X-ray screening for lung cancer.

The Lung Screening Study (LSS) was a pilot study designed to assess the feasibility of conducting a large scale randomized controlled trial (RCT) of low radiation dose spiral computed tomography (LDCT) versus chest X-ray (CXR) for lung cancer screening. Baseline results of LSS have been previously reported. Here, we report on the findings at the year one screen and on the final results of the LSS study. A total of 1660 subjects were randomized to the LDCT arm and 1658 to the CXR arm. Compliance with screening declined from 96% at baseline to 86% at year one in the LDCT arm and declined from 93% at baseline to 80% at year one in the CXR arm. Positivity rates for the year one screen were 25.8% for LDCT and 8.7% for CXR. Cancer yield was significantly less at year one for LDCT, 0.57%, than at baseline, 1.9%; cancer yield for CXR increased from 0.45% at baseline to 0.68% at year one. Forty lung cancers in the LDCT arm and 20 in the CXR arm were diagnosed over the study period. Stage I cancers comprised 48% of cases in the LDCT arm and 40% in the CXR arm. A total of 16 stage III-IV cancers were observed in the LDCT arm versus nine in the CXR arm. The LSS has established the feasibility of a RCT comparing annual spiral CT to chest X-ray for lung cancer screening.