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Emerging point of care tests for influenza: innovation or status quo.

ABSTRACT: Point of care tests (POCTs) for influenza potentially offer earlier diagnosis, enabling specific treatment, infection control measures and greater patient convenience and satisfaction. Current POCTs have limited sensitivity, some cannot distinguish influenza types, none differentiate subtypes and are relatively expensive.?To identify and characterise influenza POCTs expected to be available for clinical use in the U.K. by mid-2013, highlighting those with potential benefits over existing tests.Potential developers of influenza POCTs were identified through known manufacturers' websites, Medical Technology trade associations, the EuroScan International Network, an expert advisory group and by searching relevant online sources. Identified companies were asked to provide standard information on relevant technologies.Fifty-six companies were identified, and 29 (52%) responded, identifying 57 potentially relevant technologies. Of these, 40 (70%) were already available or had undetermined status and 5 (9%) were excluded as time to results took over 60?minutes. Of the remaining 12 emerging POCTs, 10 (83%) reportedly enabled differentiation of influenza types and eight differentiation of A subtypes. Nasopharyngeal swabs were the most commonly acceptable sample type; the sample volume ranging from 80 ?l to 1.4?ml.Most identified emerging influenza POCTs offered differentiation of influenza type and subtype. Tests claiming this capability include several incorporating reverse transcription polymerase chain reaction assays; though, these also had the longest time to result. However, whilst some identified POCTs exhibit high sensitivity and specificity, most lack published clinical data for assessment, and the overall costs of these technologies remains largely unknown.

SUBMITTER: Tayo A

PROVIDER: S-EPMC5779804 | biostudies-other | 2012 Jul

REPOSITORIES: biostudies-other

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Emerging point of care tests for influenza: innovation or status quo.

Tayo Adeoluwa A Ellis Joanna J Linden Phillips Luan L Simpson Sue S Ward Derek J DJ

Influenza and other respiratory viruses 20111122 4

<h4>Background</h4>Point of care tests (POCTs) for influenza potentially offer earlier diagnosis, enabling specific treatment, infection control measures and greater patient convenience and satisfaction. Current POCTs have limited sensitivity, some cannot distinguish influenza types, none differentiate subtypes and are relatively expensive.<h4>Aims</h4> To identify and characterise influenza POCTs expected to be available for clinical use in the U.K. by mid-2013, highlighting those with potentia ...[more]

PMID: 22103966

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Project description:Background, aim, and hypothesisThis randomized controlled trial aimed to compare the impact of a physician's attire on the perceptions of patients with cancer of compassion, professionalism, and physician preference. Our hypothesis was that patients would perceive the physician with formal attire as more compassionate than the physician wearing casual attire.Materials and methodsOne hundred five adult follow-up patients with advanced cancer were randomized to watch two standardized, 3-minute video vignettes with the same script, depicting a routine physician-patient clinic encounter. Videos included a physician in formal attire with tie and buttoned-up white coat and casual attire without a tie or white coat. Actors, patients, and investigators were all blinded to the purpose and videos watched, respectively. After each video, patients completed validated questionnaires rating their perception of physician compassion, professionalism, and their overall preference for the physician.ResultsThere were no significant differences between formal and casual attire for compassion (median [interquartile range], 25 [10-31] vs. 20 [8-27]; p = .31) and professionalism (17 [13-21] vs. 18 [14-22]; p = .42). Thirty percent of patients preferred formal attire, 31% preferred casual attire, and 38% had no preference. Subgroup analysis did not show statistically significant differences among different cohorts of age, sex, marital status, and education level.ConclusionDoctors' attire did not affect the perceptions of patients with cancer of physician's level of compassion and professionalism, nor did it influence the patients' preference for their doctor or their trust and confidence in the doctor's ability to provide care. There is a need for more studies in this area of communications skills. Clinical trial identification number. NCT03168763 IMPLICATIONS FOR PRACTICE: The significance of physician attire as a means of nonverbal communication has not been well characterized. It is an important element to consider, as patient preferences vary geographically, are influenced by cultural beliefs, and may vary based on particular care settings. Previous studies consisted of nonblinded surveys and found increasing confidence in physicians wearing a professional white coat. Unfortunately, there are no randomized controlled trials, to the authors' knowledge, to confirm the survey findings. In this randomized, blinded clinical trial the researchers found that physician's attire did not affect patients' perception of the physician's level of compassion and professionalism. Attire also did not influence the patients' preferences for their doctor or their trust and confidence in the doctor's ability to provide care.

Project description:BackgroundCharacterising dengue virus (DENV) infection history at the point of care is challenging as it relies on intensive laboratory techniques. We investigated how combining different rapid diagnostic tests (RDTs) can be used to accurately determine the primary and post-primary DENV immune status of reporting patients during diagnosis.Methods and findingsSerum from cross-sectional surveys of acute suspected dengue patients in Indonesia (N:200) and Vietnam (N: 1,217) were assayed using dengue laboratory assays and RDTs. Using logistic regression modelling, we determined the probability of being DENV NS1, IgM and IgG RDT positive according to corresponding laboratory viremia, IgM and IgG ELISA metrics. Laboratory test thresholds for RDT positivity/negativity were calculated using Youden's J index and were utilized to estimate the RDT outcomes in patients from the Philippines, where only data for viremia, IgM and IgG were available (N:28,326). Lastly, the probabilities of being primary or post-primary according to every outcome using all RDTs, by day of fever, were calculated. Combining NS1, IgM and IgG RDTs captured 94.6% (52/55) and 95.4% (104/109) of laboratory-confirmed primary and post-primary DENV cases, respectively, during the first 5 days of fever. Laboratory test predicted, and actual, RDT outcomes had high agreement (79.5% (159/200)). Among patients from the Philippines, different combinations of estimated RDT outcomes were indicative of post-primary and primary immune status. Overall, IgG RDT positive results were confirmatory of post-primary infections. In contrast, IgG RDT negative results were suggestive of both primary and post-primary infections on days 1-2 of fever, yet were confirmatory of primary infections on days 3-5 of fever.ConclusionWe demonstrate how the primary and post-primary DENV immune status of reporting patients can be estimated at the point of care by combining NS1, IgM and IgG RDTs and considering the days since symptoms onset. This framework has the potential to strengthen surveillance operations and dengue prognosis, particularly in low resource settings.

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Emerging point of care tests for influenza: innovation or status quo.

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Emerging point of care tests for influenza: innovation or status quo.

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