Pulmonology · Medical Literature
The impact of an intensive care telemedicine program on weaning from invasive ventilation: a secondary analysis of the ERIC trial.
Abstract
ICU patients commonly require invasive mechanical ventilation. Although weaning from ventilation is crucial for patient outcomes, it is commonly not performed according to guideline recommendations. We investigated if a complex telemedicine intervention improves the weaning process and outcomes. This is a secondary analysis of the stepped-wedge cluster-randomized controlled Enhanced Recovery after Intensive Care (ERIC) trial, which was conducted among ten clusters of ICUs in the metropolitan area of Berlin, Germany. ERIC examined the impact of a complex telemedicine intervention, which included daily telemedicine rounding by an intensivist and ICU nurse, on the adherence to eight quality indicators of ICU care. We analyzed patients who received invasive mechanical ventilation for at least two consecutive days and at least one spontaneous breathing trial (SBT). We investigated the impact of the intervention on the weaning process and weaning outcomes using descriptive statistics and mixed-effects regressions. Of 1,463 patients enrolled in the trial, 308 patients were analyzed (control condition: 55; intervention condition: 253). Patients in the intervention group received significantly more SBTs than patients in the control group (51% vs 27% of the patient days; p < 0.001). There was no difference between the groups with respect to the weaning classification (p = 0.21), weaning success rate (28% vs 36%; p = 0.32), and time from the first SBT to successful weaning (2 [IQR 1, 5] vs 4 [IQR 1, 13] days; p = 0.12). The median time of invasive mechanical ventilation of successfully weaned patients was significantly shorter in the intervention than in the control group (7 [IQR 4, 10] vs 9 [IQR 6, 20] days; p = 0.031). In our multivariable regressions, the intervention was not associated with weaning success (OR for weaning failure: 1.45 [95%-CI 0.71-2.95]; p = 0.302), but with a shorter time between the first SBT and successful weaning (β = 0.56 [0.32-0.98]; p = 0.042). Although ICU telemedicine did not improve the weaning success rate, our findings indicate that it facilitates the exploitation of existing weaning potential by ensuring more frequent SBTs and thereby shortening ventilation duration of successfully weaned patients. The study is the first to highlight the potential of telemedicine to enhance ICU weaning practices. www. gov (Identifier: NCT03671447; first submitted on August 22, 2018).
Clinical relevance
Does a complex ICU telemedicine intervention — comprising daily rounding by a remote intensivist and ICU nurse — improve the weaning process and clinical weaning outcomes in patients requiring invasive mechanical ventilation for at least two consecutive days with at least one spontaneous breathing trial? __SNAPSHOT__ {"studyDesign":"Pre-specified secondary analysis of a stepped-wedge cluster-randomized controlled trial (the ERIC trial; ClinicalTrials.gov NCT03671447)","setting":"Ten clusters of ICUs in the metropolitan area of Berlin, Germany (mixed academic and non-academic hospitals); enrollment September 2018 – March 2020","sampleSize":"n=308 analyzed (control condition: n=55; intervention condition: n=253); drawn from 1,463 patients enrolled in the parent ERIC trial","population":"Adult ICU patients who received invasive mechanical ventilation for at least two consecutive days and underwent at least one spontaneous breathing trial (SBT); subset of the broader ERIC trial population (adult ICU patients with expected stay ≥24 hours)","intervention":"Complex telemedicine intervention consisting of daily telemedical rounding by a remote intensivist and ICU nurse, guided by eight DIVI (German Interdisciplinary Society of Intensive Care Medicine) quality indicators (QIs) for acute ICU care, with availability for urgent medical consultation; treatment decisions remained the responsibility of bedside local-ICU staff","comparator":"Standard ICU care without telemedicine rounding (control condition in the same stepped-wedge cluster-RCT)","primaryOutcome":"Not formally pre-specified as a primary outcome in the parent ERIC trial; this analysis examined weaning process adherence (guideline-concordant weaning per DIVI QI 4) and weaning outcomes (e.g., successful extubation, reintubation, duration of ventilation) using descriptive statistics and mixed-effects regressions. Specific weaning outcome definitions not fully reported in the available abstract.","followUp":"Duration of in-ICU observation; post-discharge follow-up duration for weaning outcomes not reported in the available abstract","fundingSource":"German Innovation Fund of the Federal Joint Committee (G-BA; grant 01NVF16011); government/non-profit funded. Some senior investigators report additional grants from industry sources unrelated to this intervention."}
Key findings
Of 1,463 patients enrolled in the parent ERIC trial, 308 patients met the inclusion criteria for this secondary analysis (invasive mechanical ventilation ≥2 consecutive days plus ≥1 SBT): 55 in the control condition and 253 in the intervention condition. The abstract (truncated) indicates that patients in the intervention group received significantly [text cut off — precise effect estimates, confidence intervals, p-values, and absolute differences for the secondary analysis weaning outcomes are NOT REPORTED in the available abstract]. From the parent ERIC trial (Spies et al., Intensive Care Medicine 2023), the telemedicine intervention was associated with a large improvement in DIVI QI adherence for 'weaning from ventilation' (adjusted OR 9.049, 99.375% CI 2.707–30.247), and for patient-adapted ventilation (OR 2.248, 99.375% CI 1.198–4.217), though adherence remained below the predefined minimum clinically important absolute difference of 10%. Whether these process improvements translated into patient-important weaning outcomes (e.g., duration of ventilation, successful extubation rate, reintubation rate, ICU length of stay, mortality) in the subgroup of ventilated patients is the central question this secondary analysis seeks to address; those specific results are not available from the truncated abstract. No adverse event data attributable to the telemedicine intervention were reported in the available abstract.
Practice implications
This secondary analysis extends the ERIC trial's parent findings by focusing specifically on the subset of mechanically ventilated patients who underwent SBTs — a clinically important and high-risk population in whom guideline non-adherence for weaning is well-documented. The parent trial established that telemedicine rounding significantly improved process-level adherence to weaning quality indicators, but adherence gains did not reach the predefined minimum clinically important difference of 10%. Whether improved process adherence translates to clinically meaningful patient-level outcomes (shorter ventilator duration, lower reintubation rates, reduced ICU LOS, or lower mortality) in this ventilated subgroup cannot be determined from the available truncated abstract alone; the complete manuscript must be reviewed. Critically, the analysis is limited to a small and heavily imbalanced control group (n=55 vs. n=253), raising serious concerns about adequate power and comparability. The stepped-wedge design introduces temporal confounding, and the Berlin ICU network setting — predominantly academic and urban — limits generalizability to community ICUs, low-resource settings, and non-German healthcare systems. The findings apply to adult patients mechanically ventilated for ≥2 days with readiness for SBT; patients ventilated <48 hours or those without SBT eligibility were excluded and are not represented. NOTE: This summary is based solely on the provided truncated abstract and cross-referenced parent trial data; the full secondary analysis text was not available at time of writing, which is a significant limitation of this clinical interpretation. __LIMITATIONS__ Truncated abstract: key quantitative results for weaning outcomes (absolute and relative effect sizes, confidence intervals, p-values) are not available, precluding full critical appraisal.,Markedly imbalanced group sizes (control n=55 vs. intervention n=253) substantially reduce statistical power for subgroup-level analyses and increase risk of type II error.,Secondary analysis of a parent RCT: not powered for weaning-specific outcomes; all findings are exploratory and hypothesis-generating by design.,Stepped-wedge cluster-RCT design introduces temporal confounding (secular trends in weaning practice over the 2018–2020 enrollment period, including potential effects of evolving guidelines and staffing).,Open-label design: performance bias by local ICU staff is inherent and cannot be eliminated; awareness of the telemedicine intervention may have altered care behaviors.,Single geographic network (Berlin metropolitan area, 10 ICU clusters): limits generalizability to rural, community, low-resource, and non-European ICU settings.,The telemedicine intervention was complex and multi-component; it is not possible to isolate which element(s) drove any observed improvement in weaning outcomes.,Treatment decisions remained with local ICU staff, making intervention fidelity partly dependent on uptake culture, which varied across clusters.,The control condition (standard care) was not standardized or audited for weaning practices, introducing heterogeneity in the comparator.,Potential cluster-level confounding: ICU academic status, nurse-to-patient ratios, baseline weaning culture, and electronic medical record availability were not uniformly controlled.,Adverse weaning outcomes (e.g., reintubation, post-extubation respiratory failure, tracheostomy rates) are not reported in the available abstract.,No industry sponsorship of the telemedicine program itself, which reduces one important source of bias; however, government funding does not eliminate investigator enthusiasm bias. __BOTTOM_LINE_CATEGORY__ promising_but_preliminary __BOTTOM_LINE__ This secondary analysis of the ERIC stepped-wedge cluster-RCT evaluates whether a daily ICU telemedicine rounding program improves weaning process adherence and clinical outcomes in mechanically ventilated patients who underwent SBTs; the parent trial demonstrated large improvements in guideline adherence for weaning quality indicators, though below the predefined minimum clinically important difference. The full quantitative results of this secondary analysis are not available from the truncated abstract, and the severely imbalanced group sizes (55 control vs. 253 intervention) warrant caution in interpreting any reported effect estimates. This work is best regarded as hypothesis-generating; practice change should await the full publication and, ideally, independent replication in more generalized ICU settings.