Barriers to and facilitators for use of augmentative and alternative communication and voice restorative devices in the adult intensive care unit: a scoping review protocol

The primary aim of this scoping review is to answer the question: What are stakeholder reported barriers to and facilitators for patient communication strategy utilization for adults with an advanced airway in the ICU? To answer this question, we will conduct a scoping review with the primary aim of mapping of the current evidence on barriers to and facilitators for patient communication strategy (including AAC and voice restorative device) utilization for adults with an advanced airway in the ICU. The secondary aim of this review is to use the TDF to better understand barriers to and facilitators for communication strategy utilization, highlight key trends and gaps, and to inform evidence-based patient-centered practice, policy, and research. To our knowledge, this will be the first scoping review to map and synthesize reported barriers to and facilitators for to communication strategy utilization in the adult ICU using a theoretical framework.

The research team developed a comprehensive search strategy (Additional file 2) in consultation with a health sciences information specialist. Our search strategy will be used in Ovid Medline Epub Ahead of Print, In-Process and Other Non-Indexed Citations, Ovid Medline Daily and Ovid Medline, Ovid Embase, and translated to Ovid PsycINFO, EBSCO Cumulative Index to Nursing and Allied Health Literature (CINAHL), and the Cochrane Library.

Including a complete gray literature search can be time consuming with very minimal relevant results and questionable replicability [31]. Omitting the gray literature as part of a rapid evidence assessment introduces the risk of selection bias [30, 31]. To mitigate the risk of missing relevant studies, we will hand search reference lists of included studies and recent systematic reviews and include those meeting inclusion criteria [18, 19, 30].

We will combine and deduplicate all electronic database searches in Endnote™ X9 [32]. One reviewer (LI) will perform an initial screen of titles and abstracts removing studies not meeting the eligibility criteria. The eligibility criteria are listed in Table 1. The remaining studies will be imported into Covidence™. Two independent reviewers (LI/FG) will screen study titles and abstracts against the eligibility criteria and subsequently screen full-text articles to aid in decision making about inclusion. Discrepancies will be resolved by discussion and a third reviewer (CD) as arbiter if necessary. Reference lists of included studies and recent systematic reviews will be screened by title and then full text by the process described above to decide about inclusion [18, 19].

We will include published studies from 1990 to present reporting quantitative, qualitative, mixed or multi-method designs, including both comparative (e.g., randomized, controlled, cohort, quasi-experimental) and non-comparative (e.g., survey, narrative, audit) methods. We will include all study designs to keep our search broad enough to capture diverse stakeholder reported barriers or facilitators of patient communication strategy utilization in the ICU. We will, however, exclude reviews, protocols, and opinion pieces including editorials and letters since these designs will likely not report our outcome of interest. For practical reasons, our search will be limited to English language studies. The 1990-year limit aligns with the paradigm shift to minimal ICU sedation practices. We also consider studies published more than 25 years ago may not be relevant to current barriers and facilitators to patient communication strategy utilization in the ICU.

Two reviewers (LI/FG) will independently extract data using an iteratively developed data extraction form. Study identifiers and data to be extracted are listed in Table 2.

Stakeholder-reported outcomes will be extracted if they are reported as barriers or facilitators to patient communication strategy utilization. Stakeholders include patients and their communication partners (e.g., nurses, physicians, interdisciplinary clinicians, family members). We will define barriers as any physiological, psychological, cognitive, or contextual conditions reported to reduce or negatively affect patient communication strategy utilization in the adult ICU [33]. We will define facilitators as physiological, psychological, cognitive, or contextual conditions reported to enhance or positively affect patient communication strategy utilization in the adult ICU [33].

We anticipate the extraction of the data will be an iterative process that depends on the evidence found in our search [27]. We also anticipate that data extracted will vary based on the type of study and data presented [27]. For example, for qualitative studies, descriptions of individual barriers and facilitators will be extracted verbatim unless only reported in a synthesized format. For quantitative studies, reported outcomes will be extracted and categorized as barriers or facilitators according to the approach described by Weatherson et al. (2017) (i.e., if 50% or more participants identify ease of use of a communication device/strategy, “ease of use” will be categorized as a facilitator) [34]. We will note the reporting stakeholder source of each extracted barrier and facilitator.

To ensure reliability, two reviewers (LI/FG) will pilot the barrier and facilitator extraction process then meet to compare findings. They will repeat this process for 3–5 articles, or until reliability is reached and the extraction tool is adapted. Upon completing the extraction, the two reviewers will meet to determine agreement on the presence or absence of barriers and facilitators within each paper. The authors will solve discrepancies through discussion, rereading source material and collaboration. In the event that agreement cannot be reached, the opinion of a third reviewer (CD) will determine the final result.

Following the PRIMSA-ScR scoping review extension guide, we will present study screening and inclusion in a PRISMA chart [35]. We will also present a summary table of the studies meeting eligibility criteria including the stated aims of the study, study design, study setting, participant characteristics, and patient communication strategy. We will present extracted and coded barriers and facilitators both quantitatively and qualitatively.

Barriers and facilitators will be coded and categorized into the 14 domains of the TDF using a recommended coding approach [25, 36, 37]. A coding book will be developed by the research team prior to the coding process and iteratively modified to ensure accuracy, consistency, and transparency of the interpretive process of categorizing barriers and facilitators to the TDF domains [37]. Two reviewers will independently and deductively code the barriers and facilitators and will meet to discuss coding discrepancies until a final TDF categorization is accomplished. The resulting TDF categorization will be reviewed by the entire authorship team to determine if any alternative categorizations are plausible. We will then review the full list of extracted barriers and facilitators categorized each domain and determine the number of unique barriers and facilitators in each. Three criteria will be used to judge relevance of a TDF domain: (1) relatively high frequency of barriers or facilitators, (2) presence of conflicting barriers or facilitators, and (3) evidence of stakeholder beliefs that impact utilization of a communication strategy [25]. The authors will solve discrepancies through discussion, rereading source material, and collaboration.

We will present a quantitative summary of the barriers and facilitators to patient communication strategy utilization in the adult ICU including the frequency of reported barriers and facilitators in included studies (as counts within each TDF domain and proportions overall). We will also present the frequency (proportion) of barriers and facilitators in each TDF domain according to study design, communication strategy, and the stakeholder reporting the barrier or facilitator.

A qualitative analysis will be performed to provide major themes of barriers and facilitators of each TDF domain with reference to stakeholder and communication strategy [38]. Following an immersive reading of the coded TDF domains, we will look for recurring patterns in the data. Peer debriefing and reflexive writing will be used to bring meaning and coherence to barrier and facilitator concepts linking substantial portions of the data together. The overarching themes will represent patterns identified in the data comprising domain concepts most likely to influence communication behaviors including those that are potentially modifiable. Verbatim exemplars will be provided for the included TDF domains.

We will appraise the risk of bias of included studies using the Mixed Methods Appraisal Tool (MMAT)—Version 2018 [39, 40]. The MMAT is an easy to use tool demonstrating moderate to perfect interrater reliability [41]. Two reviewers (LI/FG) will independently appraise study quality. Though we will not exclude studies of low quality, we will use the results to describe the rigor of the included studies.

The strengths of this scoping protocol include the use of a transparent and established scoping review methodology and reporting structure; a systematic search of five electronic databases developed in consultation with a health sciences information specialist; systematic screening and data extraction carried out by two independent reviewers for all steps except the initial screen; the inclusion of qualitative and mixed methods studies; the inclusion of a quality assessment step using the MMAT; and the use of a theoretical framework to map and synthesize barriers and facilitators to patient communication strategy utilization that spans multiple levels of influence in the adult ICU.

Limitations of our protocol include selection bias by restricting our search to publications in English after 1990, the use of a rapid review approach including omission of gray literature, and single reviewer first screen of titles and abstracts. To mitigate risk of selection bias introduced by our rapid evidence selection processes, we will follow recommended strategies to ensure replicability (methodological transparency), objectivity and accuracy (two independent screeners for second review of titles/abstracts and full text, two independent data extractors with a detailed process of reaching agreement, use of a quality assessment tool), and comprehensiveness (multiple databases and hand-searching of reference lists) [42, 43].