Research ArticleResearchMedication Safety

Libre 2 produced acceptable clinical error grids in ICU testing, but neither glucose method met ISO accuracy criteria

Clinical medicine insights. Endocrinology and diabetes (PubMed)Jul 18, 2026

AI-summarized from the linked source. Educational brief, not medical advice.

Brief summary

In 157 paired ICU measurements, FreeStyle Libre 2 had a mean absolute relative difference similar to capillary testing and placed all readings in clinically acceptable error-grid zones, but neither method met ISO numerical accuracy criteria and hypoglycemic measurements were limited.

What NurseJet pulled from the source

This diagnostic accuracy study compared FreeStyle Libre 2 interstitial glucose and StatStrip capillary glucose with central laboratory venous or arterial glucose in critically ill adults receiving insulin plus ventilatory or vasopressor support. Across 157 paired measurements, mean absolute relative difference was 10.43% for Libre 2 and 7.58% for capillary glucose, a nonsignificant difference. Neither method met ISO 15197:2013 numerical accuracy criteria. Libre 2 placed 100% of readings in zones A and B on both Clarke and Parkes clinical error grids; capillary glucose placed 97.6% and 100%, respectively. Few hypoglycemic events limit conclusions in the range where confirmation is especially safety critical.

Why this matters for nurses

Critical-care nurses titrate insulin and respond to glucose trends in patients whose perfusion, edema, medications, and rapid physiologic changes may affect bedside measurements. The study supports cautious trend use while reinforcing laboratory or protocol-directed confirmation when readings are discordant or clinically consequential.

Bedside takeaway

Libre 2 trends may be clinically useful in selected ICU patients, but low or discordant values still require protocol-directed confirmation.

How This Applies in Practice

Use this when: Monitoring an ICU patient receiving insulin with a facility-approved continuous glucose system.

On your shift

Assess the glucose trend alongside perfusion, medications, nutrition, and the patient's current clinical condition.
Inspect the sensor and obtain the required confirmatory sample when a value is low, rapidly changing, unexpected, or inconsistent with symptoms.
Document the device reading, confirmatory result, and response when escalating a clinically important discrepancy.

Keep in mind: Do not change insulin solely from this study or bypass required confirmation. Follow the ICU glucose protocol, facility policy, and patient-specific provider orders.

Explain this for my unit

Key takeaways

The study evaluated 157 paired measurements against central laboratory glucose in critically ill adults receiving insulin.
Libre 2 and capillary glucose had comparable mean absolute relative difference in this sample.
Neither monitoring method met ISO 15197:2013 numerical accuracy criteria.
All Libre 2 readings fell in clinically acceptable error-grid zones, but too few hypoglycemic events were captured to establish low-range reliability.

Practice implications

Use continuous glucose data only within the ICU's approved insulin and confirmation protocol. Compare unexpected readings with the patient's condition and trend, inspect the sensor site, and obtain the required confirmatory sample before a treatment change when values are low, rapidly changing, or discordant.

Limitations & cautions

The abstract reports 157 paired measurements but not the number of participants or all clinical subgroups. Few hypoglycemic measurements were available, both index methods missed the ISO numerical standard, and error-grid placement does not establish interchangeability with laboratory testing. The findings may not generalize to other sensors, perfusion states, or insulin protocols.
AI-summarized from the linked source. Review the original article before applying to practice.

Citations

Exact source links

Open source

Public citations are filtered to exact credible source pages. Homepage-only or invalid links stay in admin review and are not shown here.

Clinical medicine insights. Endocrinology and diabetes (PubMed)

Clinical medicine insights. Endocrinology and diabetes (PubMed). Numerical and Clinical Accuracy of the FreeStyle Libre 2 System: A Diagnostic Accuracy Study in Critically Ill Patients.

Open original source

https://pubmed.ncbi.nlm.nih.gov/42473549/

Professional education only

This summary does not replace clinical judgment, facility policy, provider orders, or official guidelines. Verify practice changes against the original source and local protocol.

Related briefs

More updates for this clinical area

Back to Discover

Nursing open (PubMed)Jul 1, 2026Research ArticlePractice applicable

A randomized trial of 170 adults scheduled for intestinal stoma surgery found that adding practice with a wearable stoma-care training belt to standard preoperative education improved self-care skills, adjustment, anxiety, and education satisfaction through 30 days after discharge.

Med-SurgAI summaryReview source

Research ArticleResearchPatient EducationWorkflowPractice applicableAI summary · original source linked below

Patients at two university hospitals were randomized to standard care alone or standard care plus preoperative belt-based practice. The intervention group had higher stoma-care skill and adjustment scores at every postoperative assessment, lower anxiety from discharge through day 30, and higher satisfaction at the preoperative and discharge assessments. The study evaluated short-term patient-reported and skill outcomes rather than complications or readmissions.

Key takeaways

The trial randomized 170 patients preparing for intestinal stoma surgery at two university hospitals.
The training belt allowed preoperative practice without applying an adhesive system directly to the abdomen.
Skill and adjustment scores favored belt-based practice at discharge and through 30 days after discharge.
The abstract does not establish effects on stoma complications, healthcare use, or outcomes beyond the first postoperative month.

Why this matters on shift

Wound and ostomy nurses help patients build confidence with equipment before they must manage a new stoma at home. The trial supports hands-on rehearsal as an addition to the established teaching pathway while keeping the evidence focused on early skills, adjustment, anxiety, and satisfaction.

Bedside takeaway

Hands-on preoperative stoma practice improved early skills and adjustment, but clinical and longer-term outcomes were not measured.

Nursing implications

When an approved simulation device is available, integrate supervised practice into the existing preoperative stoma-education plan. Observe the patient's technique, revisit difficult steps before discharge, and arrange follow-up for ongoing skill or adjustment concerns.

Limitations & cautions

The trial was conducted in general-surgery departments at two university hospitals and followed patients for 30 days after discharge. The abstract does not report blinding, clinical complications, readmissions, long-term self-management, or whether the findings generalize to other devices, stoma types, or care settings.
AI-summarized from the linked source. Review the original article before applying to practice.

Citations · exact source links

Nursing open (PubMed). Effect of a Stoma Care Training Belt on Stoma Care Skills, Adjustment, Anxiety and Satisfaction in Intestinal Stoma Patients: Randomized Controlled Study.

Explain this for my unit

Open original sourceFull brief

AI-summarized from the linked source. Review the original article before applying to practice.

Critical care nursing clinics of North America (PubMed)Jun 22, 2026Systematic ReviewPractice applicable

A clinical review describes ICU nurses as central to coordinated prevention of multidrug-resistant organism transmission through stewardship, pathogen surveillance, appropriate isolation precautions, and evidence-based hygiene practices.

ICU Med-SurgAI summaryReview source

Systematic ReviewInfection ControlWorkflowPatient EducationPractice applicableAI summary · original source linked below

The review links ICU vulnerability to immunosuppression, invasive devices, broad-spectrum antimicrobial exposure, and the care environment. It emphasizes a multimodal, team-based approach rather than a single intervention, including laboratory and antibiotic stewardship, passive and active surveillance, timely use and de-escalation of precautions, and hygiene measures. The abstract does not report a systematic search or pooled patient outcomes.

Key takeaways

Critically ill patients face overlapping exposure risks related to devices, antimicrobials, immune dysfunction, and the ICU environment.
The review frames MDRO prevention as coordinated work across bedside nursing, infection prevention, laboratory, and antimicrobial-stewardship teams.
Nursing responsibilities include surveillance, hygiene, and correct implementation and de-escalation of ordered precautions.
This is a clinical review, so it does not quantify the independent effect of any single prevention measure.

Why this matters on shift

ICU nurses are continuously positioned to recognize new transmission risks, maintain device and hygiene practices, and identify when precaution or antimicrobial plans need clarification. The review supports reliable team coordination while leaving organism-specific actions to current infection-prevention guidance.

Bedside takeaway

MDRO prevention in the ICU depends on coordinated surveillance, precautions, stewardship, hygiene, and reliable bedside execution.

Nursing implications

Verify the organism-specific precaution plan at handoff, perform the approved hygiene and device-care bundle, and communicate changes in cultures, antimicrobial therapy, or isolation status. Escalate uncertainty promptly to infection prevention and the treating team.

Limitations & cautions

The PubMed abstract describes a narrative clinical review without a reported systematic search, evidence grading, sample, or pooled effect estimates. It does not establish the comparative effectiveness of specific surveillance, isolation, stewardship, or hygiene interventions, and local resistance patterns may change implementation.
AI-summarized from the linked source. Review the original article before applying to practice.

Citations · exact source links

Critical care nursing clinics of North America (PubMed). Infection Prevention and Control in the Intensive Care Unit: Preventing the Spread of Multi-Drug-Resistant Organisms.

Explain this for my unit

Open original sourceFull brief

AI-summarized from the linked source. Review the original article before applying to practice.

Pulmonology (PubMed)Jul 22, 2026Systematic ReviewPractice applicable

An umbrella review of 13 systematic reviews involving 15,363 people with COPD found that digital self-management interventions improved several pooled health-related outcomes, while evidence certainty ranged from very low to moderate and heterogeneity was substantial.

Med-SurgAI summaryReview source

Systematic ReviewResearchPatient EducationWorkflowPractice applicableAI summary · original source linked below

Across 11 meta-analyses and two narrative syntheses, digital interventions were associated with improvements in physical activity, quality of life, lung function, adherence, anxiety, and depression. Results were inconclusive for dyspnea, physical capacity, sedentary time, emergency visits, and mortality. Differences among programs, populations, outcomes, and review methods limit confidence in applying one pooled estimate to a specific tool.

Key takeaways

The umbrella review included 13 systematic reviews representing 15,363 participants with COPD.
Pooled findings favored digital self-management for physical activity, quality of life, lung function, adherence, anxiety, and depression.
Effects on dyspnea, physical capacity, sedentary time, emergency visits, and mortality were inconclusive.
Substantial heterogeneity and very low-to-moderate evidence certainty limit claims about a best platform or long-term clinical benefit.

Why this matters on shift

Medical-surgical nurses reinforce COPD self-management before discharge and help identify whether patients can use a digital plan safely after leaving the hospital. The review suggests digital support can extend education and follow-up, but it does not replace individualized assessment or establish fewer emergency visits or deaths.

Bedside takeaway

Digital COPD support may improve several self-management outcomes, but platform choice and escalation still require individualized clinical oversight.

Nursing implications

Confirm that the digital program is part of the clinical care plan and that the patient can access and understand it. Reinforce how to record symptoms, use the program's escalation pathway, and seek direct assessment when symptoms worsen rather than relying on the platform alone.

Limitations & cautions

This umbrella review synthesized existing reviews rather than individual trials. Interventions, comparators, populations, outcome definitions, and follow-up periods varied; heterogeneity was substantial for most outcomes; and GRADE certainty ranged from very low to moderate. The evidence was inconclusive for emergency visits and mortality.
AI-summarized from the linked source. Review the original article before applying to practice.

Citations · exact source links

Pulmonology (PubMed). Effectiveness of self-management digital interventions in improving health-related outcomes in patients with chronic obstructive pulmonary disease: An umbrella review.

Explain this for my unit

Open original sourceFull brief

AI-summarized from the linked source. Review the original article before applying to practice.

How This Applies in Practice

Key takeaways

Practice implications

Limitations & cautions

Exact source links

More updates for this clinical area

Preoperative stoma-belt practice improved self-care skills and adjustment after surgery

ICU review centers nurses in coordinated prevention of multidrug-resistant organism spread

Digital COPD self-management improved several outcomes, but evidence certainty remained limited