Search Results (16,075)

Background. Hematological inflammatory indices from the complete blood count have been proposed as inexpensive prognostic markers in sepsis. The systemic immune-inflammation index (SII) and neutrophil-to-lymphocyte ratio (NLR) are the most studied, but the performance of monocyte-containing alternatives (SIRI, AISI) in the elderly, in whom immunosenescence may alter the leukocyte phenotype, remains poorly characterized. Methods. In a single-center retrospective cohort of patients aged ≥65 years admitted to a tertiary ICU with Sepsis-3-defined sepsis (n = 127, 33 deaths), we compared the discrimination of six indices (NLR, PLR, MLR, SII, SIRI, AISI) for 30-day all-cause mortality using AUROC with bootstrap confidence intervals and pairwise DeLong tests. Independent associations were assessed by logistic regression adjusted for APACHE II and age; incremental value over APACHE II was explored using IDI, cNRI, calibration and decision curve analysis, with bootstrap optimism correction. Results. Thirty-day mortality was 26.0%. The monocyte-containing indices (AISI, SIRI, MLR) discriminated better than SII and NLR, and AISI was significantly superior to SII, NLR and PLR on DeLong testing, though not to SIRI, MLR or APACHE II. After adjustment for APACHE II and age, AISI, SIRI and MLR remained independently associated with mortality, whereas SII and PLR did not. Adding AISI to APACHE II improved reclassification and calibration and yielded higher net clinical benefit across clinically relevant thresholds. Conclusions. In this exploratory, single-center analysis, monocyte-containing indices, particularly AISI, were more strongly associated with 30-day mortality in elderly ICU sepsis than SII or NLR. AISI, SIRI and MLR were strongly intercorrelated and near-equivalent, and AISI did not significantly exceed APACHE II in discrimination. These hypothesis-generating findings require prospective external validation before clinical use. Full article

Background/Objectives: Adult patients supported with extracorporeal membrane oxygenation (ECMO) frequently require invasive diagnostic, therapeutic, surgical, or bedside procedures during ongoing extracorporeal support. These procedures are clinically challenging because ECMO-related anticoagulation, platelet dysfunction, acquired coagulopathy, and circuit-related coagulation activation may increase both bleeding and thrombotic risks. This systematic review evaluated the safety of invasive procedures performed during adult ECMO support, excluding tracheostomy/tracheotomy because this procedure has recently been addressed in a dedicated systematic review. Methods: A systematic search of PubMed/MEDLINE and Scopus was performed. The final bibliographic data collection was completed in April 2026. Studies were eligible if they included adult ECMO or extracorporeal life support patients undergoing invasive procedures during ongoing ECMO support, or with ECMO used as procedural support, and reported at least one procedure-specific safety outcome. Primary outcomes were procedure-related complications, bleeding, major bleeding, and transfusion requirements. Secondary outcomes included thrombotic and circuit-related complications, oxygenator exchange, reintervention, reoperation, procedural failure, ECMO duration, intensive care unit and hospital length of stay, and mortality. Results: The final qualitative synthesis included 46 studies, comprising 26 studies from PubMed/MEDLINE and 20 additional unique studies from Scopus. Included procedures were grouped into six domains: airway, bronchoscopic, and tracheobronchial procedures; thoracic surgery and lung resections; abdominal surgery, gastrointestinal endoscopy, and decompressive laparotomy; lung transplantation and perioperative extracorporeal life support; cardiovascular, vascular, pulmonary embolism-related, and mechanical circulatory support-related procedures; and mixed non-cardiac surgery. Airway and bronchoscopic procedures generally showed high procedural success in selected cohorts, although registry-level tracheal procedure data reported hemorrhagic complications in 26.0% and surgical-site bleeding in 13.0%. Emergency thoracic and abdominal procedures carried the highest bleeding, transfusion, reintervention, and mortality burden. Lung transplantation studies showed that ECMO can be integrated into perioperative pathways, but hemothorax, transfusion, thromboembolism, and anticoagulation strategy remained central safety issues. Conclusions: Invasive procedures during adult ECMO are feasible in selected patients and experienced centers, but procedural safety varies markedly by procedure type, urgency, baseline disease severity, and anticoagulation strategy. A procedure-centered, multidisciplinary approach with individualized anticoagulation management and careful planning is essential. Full article

Background/Objectives: Foot and ankle presentations during Hajj occur in a dense mass-gathering environment where prolonged walking, heat exposure, crowding, variable footwear, and limited self-care can interact with chronic disease and wound vulnerability. Previous Hajj studies have described foot injuries and diabetes-related complications, but less is known about whether simple high-risk foot documentation flags identify presentation records with higher care-pathway intensity. The primary objective was to estimate the presentation-level burden of core high-risk foot profiles among pilgrims presenting with foot and ankle conditions during Hajj 2025. Secondary objectives were to evaluate associations with a surgery-coded care-intensity indicator, hospital referral, and component heterogeneity. Methods: This observational presentation-level analysis included 3957 foot and ankle presentation records. The unit of analysis was the presentation/case record, not a unique individual pilgrim. A core high-risk foot profile was defined as diabetes, neuropathy, diabetic foot ulcer, foot ulcer, complications of open wound, or osteomyelitis. The primary outcome was a surgery-coded care-intensity indicator, defined solely from treatment documentation containing “Surgery” and interpreted as a care-pathway proxy rather than confirmed operating-room surgery. Logistic regression estimated crude and adjusted odds ratios (ORs); exploratory risk-category analyses assessed heterogeneity within the composite profile. Results: Core high-risk foot profiles were identified in 1793/3957 presentations (45.3%). The primary outcome occurred in 239/1793 high-risk presentations (13.3%) and 201/2164 non-high-risk presentations (9.3%), an absolute difference of 4.0 percentage points. The crude OR was 1.50 (95% CI 1.23–1.83; p < 0.001). The association persisted in the primary adjusted model (adjusted OR 1.47; 95% CI 1.20–1.79; p < 0.001) and in the extended clinical sensitivity model (adjusted OR 1.47; 95% CI 1.20–1.80; p < 0.001). Care pathways and secondary outcomes are summarized was also more frequent in high-risk presentations (12.2% vs. 9.8%; crude OR 1.28; 95% CI 1.05–1.57; p = 0.017). Exploratory category analysis showed that chronic-risk-only presentations had a primary outcome rate similar to non-high-risk presentations (9.0% vs. 9.3%), whereas ulcer/wound/deep-infection presentations had a higher rate (17.3%; crude OR 2.04; 95% CI 1.63–2.55; p < 0.001). Model discrimination was modest (C-statistics 0.55–0.64). Conclusions: Core high-risk foot flags were common among Hajj foot and ankle presentation records and were associated with surgery-coded care-intensity and referral documentation. However, the composite was clinically heterogeneous, the outcome was not a validated surgery endpoint, and the models were not prediction tools. These findings support cautious use of high-risk foot flags as operational prompts for assessment and pathway planning rather than as standalone clinical risk estimates. Full article

Background: Stroke significantly increases morbidity and mortality in patients receiving extracorporeal membrane oxygenation (ECMO). This study evaluates the prognostic impact of stroke subtypes, acute ischemic stroke (AIS) and hemorrhagic stroke (HS), and neurologic injury severity in a contemporary adult population. Methods: We conducted a retrospective cohort study using the TriNetX federated electronic health record network, including adult patients who underwent ECMO between 1 October 2015 and 31 December 2025. Stroke was defined as a first-instance diagnosis of AIS, HS, or unspecified cerebrovascular event occurring within 24 h of ECMO cannulation during the index hospitalization. Propensity score matching (1:1 nearest neighbor) was performed to balance baseline demographics, comorbidities, anticoagulant use, and ECMO modality between the stroke and non-stroke cohorts. Primary outcomes included all-cause mortality at 30 days, 90 days, and 1 year. Secondary outcomes included cardiac arrest, seizures, palliative care utilization, and hospital readmission. Kaplan–Meier survival analysis and multivariable Cox proportional hazards modeling were performed. Results: Among 18,981 ECMO patients, 1481 (7.8%) developed a stroke within 24 h of ECMO cannulation, including 814 AIS (54.9%), 454 HS (30.6%), and 213 unspecified cerebrovascular events (14.4%). After propensity score matching, stroke was associated with significantly higher all-cause mortality at 30 days (RR 1.16), 90 days (RR 1.18), and 1 year (RR 1.18), all p < 0.05. Stroke was also associated with higher rates of cardiac arrest, seizures, hospital readmission, and palliative care utilization (all p < 0.001). AIS was associated with significantly lower mortality than HS at 30 days, 90 days, and 1 year (all p < 0.0001). In multivariable Cox regression, only HS was independently associated with increased 30-day mortality compared with no stroke. Markers of neurologic injury severity, including cerebral edema, brain compression, and coma, were among the strongest independent predictors of mortality. Conclusions: Stroke occurring early after ECMO cannulation is associated with substantially worse short- and long-term survival, with hemorrhagic subtype and markers of neurologic injury severity driving the strongest prognostic signals. These findings support early stroke recognition and subtype-informed prognostic discussions in ECMO patients. Full article

Candida auris is a multidrug-resistant fungal pathogen associated with high mortality in healthcare settings. Although colonization is recognized as the harbinger of invasive infection, predicting which patients will develop bloodstream infection (BSI) and when this transition will occur remains a clinical challenge. In this study, patients aged ≥18 years with C. auris colonization identified at İzmir City Hospital between January 2023 and June 2025 were retrospectively analyzed. Colonization was confirmed by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Of 71 colonized patients (median age 65 years; 69.0% male; 93.0% intensive care unit (ICU)-admitted), 31 (43.7%) developed bloodstream infection (BSI). In-hospital mortality was 62.0%, rising to 74.2% in the BSI group, though this difference did not reach statistical significance (p = 0.105). Competing risks analysis using the Aalen–Johansen method showed a cumulative BSI incidence of 38.2% (95% confidence interval (CI): 28–50%) by day 10 and 43.0% (95% CI: 32–54%) by day 30 following colonization detection. On multivariate logistic regression, diabetes mellitus was the sole variable independently associated with a lower risk of BSI development (adjusted odds ratio (OR): 0.19; 95% CI: 0.06–0.68; p = 0.010); this finding was directionally consistent but did not reach statistical significance in the multivariable Fine–Gray competing risks model (subdistribution hazard ratio (SHR): 0.334; 95% CI: 0.108–1.040; p = 0.057). All 40 tested isolates had high fluconazole minimum inhibitory concentration (MIC) values; micafungin susceptibility was 92.5%, while anidulafungin resistance was observed in 32.5% of isolates. Our findings demonstrate that nearly half of colonized patients developed BSI, with no identifiable safe window for intervention, underscoring the necessity of sustained infection control measures and susceptibility-guided antifungal therapy. Full article

Background: Sepsis is a life-threatening syndrome characterized by a dysregulated host response and organ dysfunction and remains a major cause of mortality in intensive care units (ICUs). Early risk stratification is essential for clinical management. C-C motif chemokine ligand 4 (CCL4), a pro-inflammatory chemokine involved in immune cell recruitment, may reflect the severity of systemic inflammation; however, its prognostic value in adult patients with sepsis has not been fully elucidated. Methods: In this prospective, single-center observational study, 75 adult patients with sepsis admitted to the ICU were enrolled. Plasma CCL4 levels were measured at admission using an enzyme-linked immunosorbent assay (ELISA). Logistic regression, receiver operating characteristic (ROC) curve analysis, DeLong testing, and reclassification analyses using net reclassification improvement (NRI) and integrated discrimination improvement (IDI) were performed. Results: CCL4 levels were significantly higher in non-survivors than survivors (1784 ± 752 vs. 1397 ± 528 pg/mL, p = 0.011). In multivariable analysis, the CCL4 (odds ratio [OR] 1.001, p = 0.023) and Pitt bacteremia score (OR 1.523, p = 0.003) were independently associated with ICU mortality. CCL4 alone showed modest discriminative performance (AUC 0.645, 95% confidence interval [CI] 0.508–0.782). However, the addition of CCL4 to clinical severity scores significantly improved discrimination, with the highest observed in the combined model (AUC 0.885). Reclassification analyses further supported the incremental prognostic value of CCL4. Conclusions: CCL4 is independently associated with ICU mortality in sepsis, and its integration with clinical severity scores may improve prognostic accuracy for risk stratification. Full article

Objectives: The optimal conduit strategy for coronary artery bypass grafting (CABG) in patients with moderate left ventricular dysfunction (LVEF 30–49%) remains debated. While total arterial grafting (TAG) has shown benefits in broader populations, its role in this higher-risk subgroup is unclear. This study aimed to compare short-term outcomes and long-term survival between single arterial grafting (SAG) and TAG in patients with moderate LV dysfunction undergoing CABG. Methods: A retrospective analysis of 1866 patients was performed, with 640 patients matched using propensity scores (320 SAG vs. 320 TAG). Preoperative, intraoperative, and postoperative variables were assessed. Survival was evaluated using Kaplan–Meier analysis and Cox regression. Results: Matched cohorts were well balanced across baseline characteristics. Long-term survival at 10 and 15 years was numerically higher in the TAG group (85.8% and 79.7%) compared to SAG (81.7% and 74.2%), though not statistically significant (log-rank p = 0.862). Multivariate Cox regression identified age (HR 1.045, p < 0.001), NYHA class (NYHA III HR 0.610, p = 0.003), previous cardiac surgery (HR 0.501, p = 0.006), and off-pump CABG (HR 1.521, p < 0.001) as independent predictors of mortality. Grafting strategy (TAG vs. SAG) was not independently associated with long-term mortality (HR 1.005, p = 0.966). Conclusion: TAG is safe and feasible in patients with moderate LV dysfunction undergoing isolated CABG, with comparable short-term outcomes. Although unadjusted analyses suggested improved long-term survival, this difference was not observed after propensity matching or multivariable adjustment, and grafting strategy was not independently associated with mortality. Full article

Background: Early-onset ventilator-associated pneumonia (EO-VAP) is a frequent complication in comatose patients requiring endotracheal intubation. This systematic review and Bayesian meta-analysis assesses the effectiveness of antibiotic prophylaxis in preventing EO-VAP in this population. Methods: Randomized controlled trials (RCTs) and observational studies enrolling adult comatose patients (GCS ≤ 8) requiring endotracheal intubation and reporting EO-VAP incidence, late-onset VAP, ICU mortality, 28-day mortality, or ICU length of stay were included. Studies without a control group or not focused on comatose patients were excluded. Following PRISMA 2020 guidelines, a comprehensive search was conducted across three databases from inception to 31 March 2026. Risk of bias was assessed using the RoB2 tool for RCTs and the ROBINS-I tool for observational studies. Results: In accordance with Cochrane Handbook recommendations, only RCTs were included in the quantitative analysis. Five RCTs (735 patients) demonstrated a significant reduction in EO-VAP incidence with antibiotic prophylaxis (RR 0.46 [95% CI: 0.35–0.59], p = 0.001, I² = 0%), with the strongest effect in neurological patients (RR 0.41 [95% CI: 0.32–0.53], NNT = 5.4). No significant effect on mortality was demonstrated. Bayesian analysis confirmed these findings (posterior median RR 0.44 [95% CrI: 0.33–0.59], P(benefit) = 100%). Limitations: The analysis was limited by the small number of RCTs and the absence of data on antimicrobial resistance. Conclusions: Antibiotic prophylaxis reduces EO-VAP incidence in comatose patients, particularly neurological patients. A general recommendation cannot currently be made pending further evidence on mortality and antimicrobial resistance. Registration: This systematic review was prospectively registered on PROSPERO (CRD42024580280). Full article

Objective: Based on the Person-Centered Approach, this study targeted parents of very preterm (VPT) infants in Neonatal Intensive Care Units (NICUs) from Italy and Portugal. The primary aim was to classify parents by identifying latent classes of perceived risks (NICU stressors) and resources (sources of social support). Potential specificities in class membership according to Country of Belonging and sociodemographic factors were also investigated. Methods: Overall, 303 parents (92 Italian; 211 Portuguese) completed a survey including sociodemographic factors, Parental-Stressor-Scale-NICU, and Multidimensional-Scale-of-Perceived-Social-Support. Data were analyzed by multigroup latent class analysis and multinomial logistic regression. Results: Three statistically valid and cross-country classes were identified and labelled as Class 1, Adjusted/Beneficial-and-Supported-System, Class 2, Stressed-and-Supported-System, and Class 3, Parental-Role-Alteration-with-Family-Supported-System. Portuguese parents were mainly grouped in Classes 1 and 2, while Italian parents were in Class 3. Men were less likely to belong to Classes 2 and 3, while older parents having another child were more likely to belong to Class 3. Conclusions: The experience of parents of VPT infants in NICUs is inherently challenging, yet identifying specific risk profiles featured by the unique nuances of stressors and sources of support while accounting for further factors (Country of Belonging, Gender, Age, Having another child) can foster the customization of interventions aimed at providing parents with the necessary resources for adjusting to this extremely demanding experience. Full article

Background/Objectives: Post-extubation stridor (PES) is common in pediatric critical care and may contribute to extubation failure, particularly in children with heart disease. Prophylactic corticosteroids are frequently used before extubation, but their benefit in pediatric cardiac patients remains uncertain. We evaluated the association of prophylactic corticosteroids with PES and extubation failure and explored whether PES mediated any association with failure. Methods: We performed a retrospective, single-center, observational cohort study of extubation events in a pediatric cardiac critical care unit from July 2016 to June 2024. Exposure was prophylactic intravenous corticosteroids before planned extubation, most commonly dexamethasone (0.15–0.5 mg/kg per dose) or methylprednisolone (1–2 mg/kg per dose), administered 6–24 h before extubation in single- or multi-dose regimens. The primary outcome was clinically defined PES; the secondary outcome was extubation failure, defined as reintubation within 48 h. Confounding was addressed using propensity scores with inverse-probability weighting after common-support restriction. Causal interpretation of the weighted and mediation estimates was considered conditional on the no-unmeasured-confounding (ignorability) assumption. Subgroup analyses were stratified by PES status, and exploratory mediation analysis used structural equation modeling. Results: Among 494 extubation events, prophylactic corticosteroid use was not associated with lower odds of PES after weighting (OR 1.06, 95% CI 0.53–2.10) or extubation failure (OR 0.49, 95% CI 0.19–1.24). Among patients with PES, corticosteroid use was associated with a non-significant reduction in extubation failure (OR 0.70, 95% CI 0.14–3.43). Exploratory mediation analysis, interpreted under the ignorability assumption, did not support PES as a meaningful mediator. Conclusions: In this single-center cohort, prophylactic corticosteroid use was not associated with reduced PES or extubation failure. The findings do not support clinically defined PES as a key mediator of any potential treatment effect. Prospective studies are required for confirmation. Full article

The management of acute myeloid leukemia (AML) remains characterized by high relapse rates despite advances in induction and consolidation therapy. Relapse prevention represents a major unmet need, particularly in patients ineligible for allogeneic hematopoietic stem cell transplantation (allo-HSCT) or at high risk of post-transplant recurrence. This review examines current evidence supporting maintenance strategies following intensive chemotherapy or allo-HSCT, with emphasis on measurable residual disease (MRD)-guided approaches and targeted therapies. We summarize data from randomized and phase II/III trials evaluating hypomethylating agents, FLT3 inhibitors, IDH inhibitors, and immunotherapeutic strategies in post-remission settings. Oral azacitidine (CC-486) demonstrated overall survival benefit in older patients in first complete remission who were not transplant candidates, establishing a standard of care in this population. In FLT3-mutated AML, post-transplant maintenance with sorafenib and gilteritinib reduces relapse risk, with emerging evidence supporting MRD as a predictive biomarker for benefit. Other targeted agents and immunotherapies have shown promising early-phase results, although confirmatory data are limited. Ongoing phase III studies will clarify optimal patient selection, treatment duration, and integration with transplantation, aiming to transform post-remission management from passive surveillance to precision-based relapse prevention. Full article

Background/Objectives: While packed red blood cell transfusions are commonly administered in anemic neonates, transfusion strategies in preterm infants have been the subject of debate for decades, particularly due to questionable long-term benefits and limited evidence regarding short-term physiological effects. In non-intubated preterm infants, established transfusion thresholds are considered, but individual clinical judgment often plays an important role in the final decision. This study aims to assess the short-term cardiorespiratory effects of red blood cell transfusions in non-intubated very-low-birth-weight (VLBW) infants who were either spontaneously breathing or receiving non-invasive respiratory support. Methods: Retrospective, single-center analysis of 68 VLBW infants (<1500 g) who received 99 red blood cell transfusions between 2019 and 2023. Cardiorespiratory parameters were observed over a 24 h period before and after transfusion. Results: Following transfusion, there was a significant decrease in the frequency of bradycardia events per 24 h (6.51 ± 5.55 to 4.24 ± 3.8; p = 0.004), accompanied by an improvement in the depth of oxygen desaturations (78.7 ± 4.18 to 81.0 ± 3.71; p = 0.001). No significant changes were detected in the desaturation frequency, FiO₂ or heart rate. Conclusions: In clinically stable very-low-birth-weight infants receiving non-invasive ventilatory support, packed red blood cell transfusion is associated with modest, short-term improvements in cardiorespiratory stability. However, these effects are limited in scope. Further research is needed to identify which patient subgroups derive the most significant benefit from these transfusions. Full article

Background: Healthcare-associated infections (HAIs) remain a critical patient safety challenge. Hand hygiene is considered the most effective preventive measure, yet traditional monitoring captures only compliance, not technique quality. This prospective before–after study evaluated whether real-time visual feedback via the Semmelweis UV-fluorescence system is associated with improved hand hygiene quality, measured by ATP bioluminescence and microbiological culture. Methods: Three clinical departments (the Intensive Care Unit, Hematology, and Gynecology) at a Romanian tertiary hospital were purposively selected. Seventy-one healthcare workers (HCWs) were enrolled. The 12-week study comprised Phase 1 (baseline, weeks 1–4), Phase 2 (active intervention with Semmelweis feedback, weeks 5–8), a one-week washout (week 9), and Phase 3 (sustainability assessment, weeks 10–12). Paired ATP-CFU samples were collected weekly. Within-group comparisons used Kruskal–Wallis H tests with post hoc Dunn’s tests and Bonferroni correction. Secondary outcomes included Semmelweis global and zone-specific coverage and the correlation between subject-level Semmelweis coverage and ATP bioluminescence (Spearman’s rho). Results: A total of 781 paired ATP-CFU samples and 497 Semmelweis evaluations were analyzed. Mean ATP declined from 195.9 RLU at baseline to 148.2 RLU in Phase 2 (−24.4%) and 154.8 RLU in Phase 3 (−21.0%; Kruskal–Wallis H = 102.73, p < 0.001). CFU/mL declined from 84.8 to 66.2 (−21.9%) and 70.7 (−16.6%; H = 22.48, p < 0.001). Post hoc comparisons confirmed significant Phase 1 versus Phase 2 and Phase 1 versus Phase 3 differences for both markers (all p < 0.01), while Phase 2 versus Phase 3 was non-significant, indicating stabilization at an improved level. Subject-level Semmelweis coverage correlated negatively with ATP (rho = −0.665, 95% CI −0.778 to −0.510, p < 0.001), supporting construct validity at the operator level. Semmelweis global coverage was 93.1% (Phase 2) and 90.6% (Phase 3); interdigital spaces showed the highest inadequacy rate (73.9% protocol-based, 92.5% targeted). Conclusions: Real-time visual feedback via UV-fluorescence imaging was associated with significant and sustained improvements in hand hygiene quality beyond baseline. ATP, CFU, and Semmelweis assessments captured complementary, non-redundant dimensions, supporting multimodal evaluation. Interdigital spaces and fingertips remained persistent failure points requiring targeted educational reinforcement. Full article

Objective: Preanalytical errors account for the vast majority of preanalytical incidents and remain a fundamental threat to the reliability of test results. Although the types and frequencies of these errors have been extensively studied in the literature, their time-dependent variability has received comparatively little attention. This study aimed to evaluate how preanalytical specimen rejection rates vary across intraday time intervals and to assess the independent influence of time on preanalytical quality. Methods: This retrospective observational study included a total of 579,845 specimens accepted by the central laboratory of Istanbul Atlas University Hospital between January 2024 and December 2025. Specimens were analyzed with respect to preanalytical rejection reasons, the distribution and rate of these reasons across clinical units, and time of day. Each day was divided into six equal four-hour intervals: Z1 (00:00–04:00), Z2 (04:00–08:00), Z3 (08:00–12:00), Z4 (12:00–16:00), Z5 (16:00–20:00), and Z6 (20:00–24:00). Statistical analyses were performed using the Pearson chi-square test, and effect sizes were quantified using Cramér’s V coefficient. Results: Of the 579,845 specimens examined, 4365 were rejected, yielding an overall rejection rate of 0.79%. Rejection rates were found to be non-uniformly distributed across the day (p < 0.001). The highest rejection rate was observed during the Z2 interval (04:00–08:00) at 1.98%, whereas the lowest was recorded during Z3 (08:00–12:00) at 0.45%. Negative binomial regression analysis identified the Z2 interval as the only time period independently associated with an increased rejection risk Incidence Rate Ratio (IRR) = 1.63; 95% Confidence Interval (CI): 1.22–2.19. Among clinical units, the highest rejection rate was recorded in the emergency department (1.92%). Analysis of error types revealed that the majority of rejections were attributable to hemolysis (47.5%) and clotted specimens (26.3%). Hemolysis rates peaked in the emergency department, while clotted specimens occurred more frequently within intensive care units. Analysis of time and error interactions revealed that clotted specimens peaked during Z1 and Z2, whereas hemolysis became the primary cause of rejection during Z3 and Z4. Conclusions: Preanalytical specimen rejection rates exhibited significant variation according to time of day, clinical unit, and error type, with time emerging as a factor independently associated with preanalytical quality. The coexistence of elevated rejection risk during Z2 (04:00–08:00) and markedly low rejection rates during Z3 (08:00–12:00) indicates that the relationship between workload and error frequency is not linear. Although hemolysis and clotted specimens constituted the dominant error types, their distribution followed distinct patterns depending on the clinical unit and time interval. These results underscore the necessity of time-based monitoring to pinpoint unit-specific risks, providing a clear roadmap for targeted quality improvement interventions. Full article

Background/Objectives: Early enteral nutrition (EN) initiation and progressive EN advancement are critical components of nutritional care in critically ill patients; however, not all patients achieve successful early EN advancement in real-world intensive care unit (ICU) settings. We investigated clinical predictors of early EN initiation and successful early EN advancement at ICU admission in a retrospective cohort study at a single tertiary academic medical center in South Korea. Methods: A total of 2112 critically ill adults receiving EN between January 2020 and December 2024 were included. Successful early EN advancement was defined as EN initiation within 48 h of ICU admission, followed by progressive advancement without any reduction or discontinuation during the subsequent seven days. Using a two-stage multivariable logistic regression approach, we identified predictors of each outcome. Results: Among the total cohort, 722 patients (34.2%) achieved early EN initiation, of whom 449 (62.2%) subsequently achieved successful early EN advancement, representing 21.3% of the total cohort. Male sex (adjusted odds ratio [aOR] 0.87, 95% CI 0.78–0.96), higher admission lactate (aOR 0.85, 95% CI 0.74–0.96), prior surgery (aOR 0.81, 95% CI 0.70–0.93), and higher APACHE II score (aOR 0.88, 95% CI 0.79–0.99) were identified as significant negative predictors (all p < 0.05). Admission-time variables (male sex, elevated lactate, prior surgery, and higher APACHE II scores) effectively identify patients at risk of early EN failure. Conclusions: Reflecting distinct predictor profiles between ICU types, the preliminary nomogram can guide tailored nutritional strategies, although prospective external validation remains essential before clinical implementation. Full article