Research ArticleResearchMedication SafetyQuality Improvement

ICU trial of targeted temperature management for heatstroke finds 35°C cooling provides no survival benefit and increases severe gastrointestinal injury and arrhythmias

Critical care medicine (PubMed)Oct 1, 2026

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Brief summary

A randomized controlled trial in ICU heatstroke patients found that therapeutic hypothermia at 35°C conferred no neurological or 28-day survival advantage over normothermia at 37°C, but caused severe acute gastrointestinal injury in 52.9% of patients and quadrupled cardiac arrhythmias.

What NurseJet pulled from the source

Severe heatstroke is a life-threatening medical emergency characterized by extreme core hyperthermia, central nervous system dysfunction, and systemic inflammatory response leading to multi-organ failure. While immediate cooling is vital in the acute resuscitation phase, whether deeper therapeutic hypothermia in the intensive care unit improves recovery remains unproven. This multicenter pilot randomized clinical trial evaluated targeted temperature management (TTM) comparing therapeutic hypothermia (target 35°C) to controlled normothermia (target 37°C) in adult heatstroke patients admitted to intensive care. Protocol adherence exceeded 88%, with 83.7% recruitment and 97.2% retention. Clinical efficacy endpoints showed no significant differences in 28-day poor functional outcome (17.6% for hypothermia vs 16.7% for normothermia) or 28-day survival (82.4% vs 83.3%). However, therapeutic hypothermia resulted in profound safety hazards: severe acute gastrointestinal injury (AGI grade 3–4) developed in 52.9% of hypothermia patients compared to 0% of normothermia patients (P < 0.001), and cardiac arrhythmias occurred in 41.2% versus 11.1% (P = 0.045). Additionally, pharmacological shivering suppression was required in 100% of the hypothermia group versus 27.8% in the normothermia group (P < 0.001).

Why this matters for nurses

Critical care nurses are directly responsible for managing surface or intravascular targeted temperature cooling devices, monitoring core bladder/esophageal temperatures, and managing shivering protocols. This trial provides crucial safety evidence warning nurses and intensivist teams against overcooling heatstroke patients below 37°C due to high gastrointestinal and cardiac toxicity.

Bedside takeaway

In an ICU heatstroke trial, cooling to 35°C offered no survival or functional benefit over 37°C (survival 82.4% vs 83.3%) but sharply increased severe gastrointestinal injury (52.9% vs 0%, p<0.001) and arrhythmias (41.2% vs 11.1%, p=0.045).

Key takeaways

Multicenter ICU pilot randomized trial evaluated targeted temperature management at 35°C versus 37°C in severe heatstroke.
Therapeutic hypothermia (35°C) yielded no difference in 28-day poor functional outcome (17.6% vs 16.7%) or survival (82.4% vs 83.3%).
Hypothermia caused marked organ toxicity, including severe grade 3–4 acute gastrointestinal injury (52.9% vs 0%, P < 0.001) and arrhythmias (41.2% vs 11.1%, P = 0.045).
Universal pharmacological shivering control was required at 35°C (100% vs 27.8%), leading investigators to recommend against routine therapeutic hypothermia for heatstroke.

Practice implications

Once initial emergency cooling lowers core temperature below 38°C, target normothermia (37°C) rather than deeper hypothermia (35°C), monitor continuously for cardiac dysrhythmias and feed intolerance, and assess frequently for shivering without excessive sedation.

Limitations & cautions

Pilot sample size; focused on ICU inpatient phase following initial acute prehospital/ED resuscitation; long-term cognitive and functional trajectories beyond 28 days were not evaluated.
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Citations

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Critical care medicine (PubMed)

Critical care medicine (PubMed). Targeted Temperature Management at 35°C vs. 37°C for Heatstroke in ICU: A Pilot Randomized Controlled Trial.

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https://pubmed.ncbi.nlm.nih.gov/42560130/

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.

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Trauma, violence & abuse (PubMed)Oct 17, 2026Systematic Review

A systematic review and meta-analysis of 20 emergency department studies encompassing 7,498 women found intimate partner violence was associated with a three-fold increased risk of suicide attempt, with psychological violence showing a stronger association than physical violence.

Emergency PsychAI summaryReview source

Systematic ReviewResearchWorkflowQuality ImprovementAI summary · original source linked below

Women experiencing intimate partner violence (IPV) and acute suicidality frequently seek medical evaluation in emergency departments (EDs), but the intersection between these two acute presentations is often overlooked during fast-paced triage. This systematic review, meta-analysis, and narrative synthesis synthesized 20 ED-based studies comprising 7,498 women across three global databases. Investigators used random-effects models and evaluated study quality with the Joanna Briggs Institute (JBI) checklist. Overall, 22% (95% CI: 11%–36%) of women presenting to the ED for suicide-related care had a history of physical IPV, while 13% (95% CI: 8%–18%) of women with known IPV histories reported active suicidality. A history of IPV was associated with a three-fold increase in the risk of suicide attempt (risk ratio [RR] 3.00; 95% CI: 1.39–6.47). Notably, psychological IPV demonstrated a stronger association with suicide risk (RR 3.23; 95% CI: 1.68–6.19) than physical IPV alone (RR 2.00; 95% CI: 1.26–3.17).

Key takeaways

Systematic review synthesized 20 emergency department studies encompassing 7,498 women.
Nearly 1 in 4 women (22%; 95% CI: 11%–36%) presenting to the ED with suicidality had experienced physical IPV.
IPV was associated with a three-fold higher risk of suicide attempt (RR 3.00; 95% CI: 1.39–6.47).
Psychological IPV showed a higher risk ratio for suicide attempts (RR 3.23; 95% CI: 1.68–6.19) than physical IPV (RR 2.00; 95% CI: 1.26–3.17).

Why this matters on shift

Emergency nurses are the primary healthcare professionals conducting universal triage, suicide risk screening (e.g., C-SSRS), and domestic violence assessments. Recognizing that nearly one-quarter of suicidal female presentations co-occur with IPV—and that non-physical, psychological abuse carries an even higher relative risk for suicide attempt—demands that ED nursing assessments integrate trauma-informed safety planning rather than treating suicidality and relationship violence in isolation.

Bedside takeaway

In an ED meta-analysis of 7,498 women, intimate partner violence tripled suicide attempt risk (RR 3.00), with psychological IPV (RR 3.23) linked more strongly than physical IPV (RR 2.00).

Nursing implications

Conduct routine IPV and suicide screenings privately away from companions or visitors, assess for emotional and psychological coercion even when physical injury is absent, and connect patients showing combined risk immediately to hospital social work, victim advocacy, and safe crisis intervention pathways.

Limitations & cautions

High between-study heterogeneity across meta-analytic models (I² > 75%); high risk of bias identified in half of the included primary studies; relied largely on cross-sectional self-reported survey measures.
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Citations · exact source links

Trauma, violence & abuse (PubMed). Intimate Partner Violence and Suicide Risk among Women Presenting to Emergency Departments: A Systematic Review, Meta-Analysis, and Narrative Synthesis.

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Western journal of nursing research (PubMed)Oct 15, 2026Systematic Review

A systematic review and meta-analysis of 38 studies including 19,033 patients identified clinical severity scales—specifically Modified Fisher grade and Fisher grade—and hemodynamic status as the strongest predictors of cerebral vasospasm following subarachnoid hemorrhage.

Emergency ICUAI summaryReview source

Systematic ReviewResearchQuality ImprovementAI summary · original source linked below

Cerebral vasospasm is a severe complication of aneurysmal subarachnoid hemorrhage (SAH) that frequently precipitates delayed cerebral ischemia and increases patient mortality. To clarify clinical predictors and inform intensive care nursing assessments, investigators conducted a systematic review and meta-analysis across eight databases through August 2024, evaluating study quality with the Joanna Briggs Institute checklist and Risk of Bias 2.0 tool. Across 38 included studies (27 in the meta-analysis) encompassing 19,033 patients, clinical severity metrics showed the strongest association with cerebral vasospasm: Modified Fisher grade (odds ratio [OR] 2.88; 95% CI, 2.04–4.07), Fisher grade (OR 2.27; 95% CI, 1.91–2.69), and hemodynamic status (OR 2.56; 95% CI, 1.17–5.59). Aneurysm-related characteristics and comorbid conditions were also linked to increased vasospasm risk, whereas clinical biomarkers and inflammatory markers demonstrated comparatively smaller effect sizes.

Key takeaways

Systematic review and meta-analysis synthesized 38 studies (27 in meta-analysis) encompassing 19,033 patients after subarachnoid hemorrhage.
Radiographic and clinical severity scales showed the strongest association with cerebral vasospasm: Modified Fisher grade (OR 2.88; 95% CI, 2.04–4.07) and Fisher grade (OR 2.27; 95% CI, 1.91–2.69).
Hemodynamic instability was strongly associated with vasospasm risk (OR 2.56; 95% CI, 1.17–5.59).
Aneurysm features and comorbidities also increased risk, while clinical biomarkers and inflammatory markers demonstrated smaller effect sizes.

Why this matters on shift

Neurocritical care nurses are the first line of defense in detecting subtle neurological deterioration and hemodynamic shifts in patients hospitalized for subarachnoid hemorrhage. Understanding that initial Fisher grade and hemodynamic status carry the highest statistical odds for vasospasm reinforces rigorous serial neurological scoring and strict blood pressure monitoring during the peak vasospasm window.

Bedside takeaway

In a meta-analysis of 19,033 SAH patients, Modified Fisher grade (OR 2.88), Fisher grade (OR 2.27), and hemodynamic status (OR 2.56) were the strongest predictors of cerebral vasospasm.

Nursing implications

Identify admission Fisher or Modified Fisher scores during shift handoff, maintain strict hemodynamic parameters per provider orders, and immediately escalate focal neurological deficits, altered sensorium, or transcranial Doppler velocity increases.

Limitations & cautions

Synthesized observational studies with heterogeneous definitions and reporting standards; meta-analysis reflects statistical associations rather than prospective causal prediction models; abstract does not detail specific individual biomarker cutoff values.
AI-summarized from the linked source. Review the original article before applying to practice.

Citations · exact source links

Western journal of nursing research (PubMed). Key Predictors of Cerebral Vasospasm Following Subarachnoid Hemorrhage: A Systematic Review and Meta-Analysis.

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Clinical research in cardiology : official journal of the German Cardiac Society (PubMed)Sep 28, 2026Research Article

A prespecified sex-specific secondary analysis of the PUSH-AHF trial in 310 patients found natriuresis-guided diuretic therapy increased 24-hour sodium excretion and reduced 180-day mortality or heart failure readmission in men, but not in women.

Telemetry ICUAI summaryReview source

Research ArticleResearchMedication SafetyAI summary · original source linked below

Natriuresis-guided loop diuretic titration uses spot urinary sodium measurements to tailor decongestive therapy in acute heart failure (AHF). In this sex-specific analysis of the randomized PUSH-AHF trial, investigators evaluated 310 patients (45% women) assigned to natriuresis-guided therapy versus standard of care. In men, natriuresis-guided therapy produced significantly greater mean 24-hour total natriuresis compared with standard care (443 vs 354 mmol, p = 0.004), whereas women showed no significant difference between treatment arms (357 vs 336 mmol, p = 0.533; adjusted p-interaction = 0.276). Notably, the median 24-hour natriuretic response per milligram of loop diuretic (bumetanide equivalents) was significantly lower in women receiving natriuresis-guided therapy than standard care (23 vs 52 mmol/mg, p = 0.001), while no difference was observed in men (38 vs 45 mmol/mg, p = 0.337; adjusted p-interaction = 0.009). Clinically, natriuresis guidance was associated with a 49% lower risk of 180-day all-cause mortality or HF rehospitalization in men (adjusted HR 0.51; 95% CI, 0.30–0.86; p = 0.011), but showed no benefit in women (adjusted HR 1.40; 95% CI, 0.67–2.91; p = 0.368; adjusted p-interaction = 0.026).

Key takeaways

Sex-specific analysis of the PUSH-AHF randomized trial evaluated 310 patients (45% women) with acute heart failure.
In men, natriuresis-guided therapy increased 24-hour urinary sodium excretion (443 vs 354 mmol, p = 0.004) and reduced 180-day mortality/rehospitalization by 49% (adjusted HR 0.51, p = 0.011).
In women, natriuresis guidance did not increase total natriuresis (357 vs 336 mmol, p = 0.533) or improve 180-day clinical outcomes (adjusted HR 1.40, p = 0.368; p-interaction = 0.026).
Women in the guided arm exhibited a blunted natriuretic response per milligram of loop diuretic (23 vs 52 mmol/mg bumetanide, p = 0.001).

Why this matters on shift

Cardiology and telemetry nurses frequently manage intensive loop diuretic infusions and collect spot urinary sodium samples during acute decompensated heart failure admissions. These findings demonstrate that diuretic responsiveness and natriuresis-guided protocols may operate differently by biological sex, warning clinicians that intensifying diuretic doses based solely on spot sodium targets may not yield uniform decongestive or prognostic benefits across all patient groups.

Bedside takeaway

In the PUSH-AHF trial (310 patients), natriuresis-guided diuretic therapy reduced 180-day mortality/readmission in men (aHR 0.51) but showed no benefit in women (aHR 1.40; p-interaction=0.026).

Nursing implications

Collect urine samples for spot sodium strictly at ordered intervals during acute decongestion, maintain accurate intake/output records, monitor serum electrolytes and renal function closely during diuretic uptitration, and recognize that blunted urinary sodium output in female patients may reflect altered pharmacodynamics rather than simple noncompliance with fluid restrictions.

Limitations & cautions

Post-hoc subgroup analysis of a randomized trial with limited sample size (n = 310, including 139 women); findings are hypothesis-generating and require prospective validation in sex-stratified clinical trials before modifying clinical guidelines.
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Citations · exact source links

Clinical research in cardiology : official journal of the German Cardiac Society (PubMed). Effects of natriuresis-guided diuretic therapy in men and women with acute heart failure: insights from PUSH-AHF.

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Key takeaways

Practice implications

Limitations & cautions

Exact source links

More updates for this clinical area

Meta-analysis of 20 emergency department studies links intimate partner violence to three-fold higher suicide attempt risk

Meta-analysis of 19,033 SAH patients identifies clinical severity and hemodynamics as top predictors of cerebral vasospasm

PUSH-AHF trial analysis finds natriuresis-guided diuretic therapy reduces 180-day events in men but not women with acute heart failure