Single-center Cohort Research Articles

The clinical management and efficacy of metagenomic next-generation sequencing in patients with pyogenic spinal infection: a single-center cohort study

ObjectiveThis study aims to evaluate the clinical management and effectiveness of metagenomic next-generation sequencing (mNGS) in patients with pyogenic spinal infections.MethodsWe conducted a retrospective review of 17 patients diagnosed with pyogenic spinal infections and treated at our institution between October 2022 and February 2024. The cohort included 8 males and 9 females, with a mean age of 63.59 ± 10.18 years (range: 41–71 years). The infections comprised 9 epidural abscesses, 6 intervertebral space infections, and 2 deep abscesses. All patients underwent open surgical procedures and mNGS-based bacterial identification using intraoperative pus or tissue specimens, in addition to conventional blood bacterial cultures. Clinical outcomes were assessed using CRP, PCT, WBC inflammatory markers, and VAS scores postoperatively.ResultsAll 17 patients with pyogenic spinal infections underwent open surgery and mNGS bacterial detection at our institution. Among the 17 patients, mNGS yielded positive results in 14 cases (82.4%), significantly higher than the 5.9% positivity rate of conventional bacterial cultures (p < 0.001). The mNGS test time was notably shorter than conventional cultures (1.0 vs. 5.88 days, p < 0.001). Postoperative antibiotic therapy was adjusted based on mNGS findings. There were significant reductions in postoperative VAS, WBC, PCT, and CRP values compared to preoperative levels (p < 0.01).ConclusionMetagenomic next-generation sequencing is effective in managing pyogenic spinal infections by facilitating rapid and sensitive detection of pathogens. This technique improves the timeliness and accuracy of diagnosis, highlighting its potential for broader clinical use.

Changes in portal pulsatility index induced by a fluid challenge in patients with haemodynamic instability and systemic venous congestion: a prospective cohort study

BackgroundIt is uncertain whether fluid administration can improve patients with systemic venous congestion and haemodynamic instability. This study aimed to describe the changes in systemic venous congestion and peripheral perfusion parameters induced by a fluid challenge in these patients, and to analyse the influence of the fluid responsiveness status on these changes.MethodsThe study is a single-centre prospective cohort study of 36 critically ill ICU patients with haemodynamic instability and a maximum vena cava diameter ≥ 20 mm. Changes in cardiac index during a fluid challenge (4 mL/kg of lactated Ringer’s solution during 5 min) assessed by pulse contour analysis, central venous pressure, ultrasound systemic congestion parameters (portal venous flow pulsatility index, supra hepatic and intrarenal venous Doppler), and peripheral perfusion parameters (capillary refill time and peripheral perfusion index) were assessed in the overall population. All these data were compared between patients presenting a cardiac index increase > 10% during the fluid challenge (fluid responders) and the others (fluid non-responders).ResultsTwenty-eight (78%) patients were admitted for postoperative care following cardiac surgery; their mean ± SD left ventricular ejection fraction was 42 ± 9% and right ventricular dysfunction was found in at least 61% of the patients. The mean ± SD SOFA score was 9 ± 3. Thirteen (36%) patients were fluid responders. The fluid challenge administration induced a significant increase in portal pulsatility index, VExUS score, and central venous pressure without significant difference of these changes between fluid responders and non-responders. No significant change in perfusion parameters was observed.ConclusionFluid administration in patients with haemodynamic instability and systemic venous congestion worsens venous congestion regardless of the fluid responsiveness status, without improving perfusion parameters.

The impact of environmental factors and social determinants of health on mismatch repair status in a single-center endometrial cancer cohort

The impact of environmental factors and social determinants of health on mismatch repair status in a single-center endometrial cancer cohort

Perioperative Management of Pediatric Combined Heart and Liver Transplantation: A 17 year single center experience.

An increasing number of centers are undertaking combined heart and liver transplantation in adult and pediatric patients with congenital heart disease. The primary aim of this study was to describe the perioperative management of a single center cohort, identifying challenges and potential solutions. We conducted a retrospective review of all patients undergoing combined heart and liver transplantation at Stanford Children's Hospital from 2006 to 2022. Preoperative information included cardiac diagnosis, hemodynamics, and severity of liver disease. Intraoperative data included length of surgery, cardiopulmonary bypass time, and blood products transfused. Postoperative data included blood products transfused in the intensive care unit, time to extubation, length of intensive care unit stay, survival outcomes and 30-day adverse events. Eighteen patients underwent en bloc combined heart and liver transplantation at Stanford Children's Hospital from 2006 to 2022, and the majority 15 (83%) were transplanted for failing Fontan circulation with Fontan Associated Liver Disease. Median surgical procedure time was 13.4 [11.5, 14.5] h with a cardiopulmonary bypass time of 4.3 [3.9, 5.8] h. Median total blood products transfused in the operating room post cardiopulmonary bypass was 89.4 [63.9, 127.0] mLs/kg. Nine patients (50%) had vasoplegia during cardiopulmonary bypass. Activated prothrombin complex concentrates were used post cardiopulmonary bypass in 15 (83%) patients with a 30-day thromboembolism rate of 22%. Median time to extubation was 4.0 [2.8, 6.5] days, median intensive care unit length of stay 20.0 [7.8, 48.3] days and median hospital length of stay 54.0 [30.5, 68.3] days. Incidence of renal replacement therapy was 11%; however, none required renal replacement therapy by the time of hospital discharge. Neurological events within 30 days were 17% and the 30 day and 1 year survival was 89%. Perioperative challenges include major perioperative bleeding, unstable hemodynamics, and end organ injury including acute kidney injury and neurological events. Successful outcomes for en bloc combined heart and liver transplantation are possible with careful multidisciplinary planning, communication, patient selection, and integrated peri-operative management.

Suspicious of Acute Kidney Graft Rejection: Tacrolimus Pharmacokinetics Under Methylprednisolone Therapy.

Acute rejection remains one of the main complications in the first months after transplantation and may influence long-term outcomes. Tacrolimus has proven its usefulness in solid organ transplants and its monitoring through the application of pharmacokinetic concepts to optimize individual drug therapy. This research proposes to evaluate the tacrolimus pharmacokinetic parameters in patients suspected of acute kidney graft rejection under methylprednisolone pulse therapy. Eleven adult tacrolimus-treated renal recipients were selected from a prospective, single-arm, single-center cohort study, with suspicion of acute rejection although in use of methylprednisolone pulses therapy. They were followed up for three months posttransplantation, being tacrolimus trough serum concentrations determined using a chemiluminescent magnetic immunoassay, and pharmacokinetic parameters were estimated by using a nonlinear mixed-effects model implemented by Monolix 2020R1. A tacrolimus trough serum concentration range of 8 to 12 ng.mL-1 was considered therapeutic. Six patients showed acute cellular rejection, and two of them in addition had an antibody- mediated rejection. Tacrolimus trough serum concentration was below the reference range in eight patients. Most patients showed a high tacrolimus concentration intrapatient and pharmacokinetic parameters variability. The obtained pharmacokinetics parameters helped in understanding the kidney recipient patients' tacrolimus behavior, assisting in the improvement of individual drug therapy and reducing the risk of acute rejection episodes.

Short-term mortality and associated factors among older hospitalized patients: A narrative retrospective analysis of end-of-life care in an acute geriatric unit

ObjectivesTo explore short-term mortality and its predictors among older patients hospitalized in a acute geriatric ward (AGW) in Northwestern Italy. DesignRetrospective observational single-center cohort study. Material and methodsPatients consecutively admitted for any reason between June 2021 and May 2022 were included in the analysis. Along with sociodemographic, clinical, and functional variables, prognosis estimation (Palliative Prognostic Index; PPI) at the time of admission was registered. Short-term all-cause mortality (in-hospital and within 3 months of discharge) was the primary outcome. ResultsAbout one-third of the total sample died in the short-term (32.4 %). Along with PPI score (OR 1.115, 95 %CI 1.034–1.202), short-term mortality was independently associated with functional dependency (OR 1.278, 95 %CI 1.170–1.395). ConclusionsThe high short-term mortality in our sample should call for the inclusion of palliative prognostic tools within the in-hospital comprehensive geriatric assessment to better recognize and appropriately manage older patients at the end of life.

Clinical Course and Outcomes of Brain Tumor Patients Admitted to Medical Intensive Care Unit: A Descriptive Analysis

Background: There is a shortage of data on brain tumor patients admitted in to intensive care unit (ICU) from developing countries. We aimed to assess the clinical course and 30-day mortality with factors affecting the mortality of brain tumor patients who were admitted to medical ICU.Methods: This study was a single-centre retrospective observational cohort study and was conducted in a medical ICU of a tertiary care center in India. We included 42 patients admitted in to the medical oncology ICU over 3 years. Data regarding demographics, baseline characteristics, clinical and laboratory data, need for organ support, and 30-day mortality were collected. Factors associated with increased mortality in these patients were determined.Results: Overall 30-day mortality was 30.95%. The most common indication for ICU admission was altered sensorium (57.1%) followed by sepsis (23.8%). Age [odds ratio, OR: 0.843 (95% confidence interval, CI: 0.721–0.986)], and need for invasive mechanical ventilator (IMV) support [OR: 484.62 (95% CI: 2.707–8676.02)] or vasopressor support [OR: 523.83 (95% CI: 2.12– 3,023.13)] were directly associated with 30-day mortality. Severity indices such as Sequential Organ Failure Assessment (SOFA) score, SAPS II (Simplified Acute Physiology Score II), and Acute physiology and chronic health evaluation II (APACHE II), APACHE III and APACHE IV scores were higher in non-survivors than survivors.Conclusion: Advancing age and need for IMV or vasopressor support may be associated with worse prognosis in brain tumor patients admitted in to ICU. A scoring system could be used along with clinical judgement to triage brain tumor patients for ICU admission.

Intraoperative short-term blood pressure variability and postoperative acute kidney injury: a single-center retrospective cohort study using sample entropy analysis

BackgroundTo investigate if intraoperative very short-term variability in blood pressure measured by sample entropy improves discrimination of postoperative acute kidney injury after noncardiac surgery.MethodsAdult surgical patients undergoing general, thoracic, urological, or gynecological surgery between August 2016 to June 2017 at Seoul National University Hospital were included. The primary outcome was acute kidney injury stage 1, defined by the Kidney Disease: Improving Global Outcomes guidelines. Exploratory and explanatory variables included sample entropy of the mean arterial pressure and standard demographic, surgical, anesthesia and hypotension over time indices known to be associated with acute kidney injury respectively. Random forest classification and L1 logistic regression were used to assess four models for discriminating acute kidney injury: (1) Standard risk factors which included demographic, anesthetic, and surgical variables (2) Standard risk factors and cumulative hypotension over time (3) Standard risk factors and sample entropy (4) Standard risk factors, cumulative hypotension over time and sample entropy.ResultsTwo hundred and thirteen (7.4%) cases developed postoperative acute kidney injury. The median and interquartile range for sample entropy of mean arterial pressure was 0.34 and [0.26, 0.42] respectively. C-statistics were identical between the random forest and L1 logistic regression models. Results demonstrated no improvement in discrimination of postoperative acute kidney injury with the addition of the sample entropy of mean arterial pressure: Standard risk factors: 0.81 [0.76, 0.85], Standard risk factors and hypotension over time indices: 0.80 [0.75, 0.85], Standard risk factors and sample entropy of mean arterial pressure: 0.81 [0.76, 0.85] and Standard risk factors, sample entropy of mean arterial pressure and hypotension over time indices: 0.81 [0.76, 0.86].ConclusionAssessment of very short-term blood pressure variability does not improve the discrimination of postoperative acute kidney injury in patients undergoing non-cardiac surgery in this sample.

Clinical outcomes and prognostic factors in patients with nasolacrimal duct obstruction or stenosis using dacryoendoscopy.

To evaluate the effectiveness of dacryoendoscopic-assisted laser dacryoplasty with silicone intubation (DLDI) for the management of nasolacrimal duct obstruction (NLDO) or stenosis, and to identify the factors associated with DLDI failure. This study was designed as a prospective, single-centre cohort study. Patients with NLDO or stenosis who underwent DLDI from December 2019 to December 2021 at Tianjin Eye Hospital were considered for enrolment. The Kaplan-Meier estimator was used to assess the anatomical and functional success rate of DLDI within 2 years follow-up after removal of the silicone stent. Cox proportional hazards regression models were used to identify risk factors for treatment failure. 170, 174 and 178 eyes were included in Groups A (proximal NLDO), B (distal NLDO) and C (nasolacrimal duct stenosis), respectively. The overall anatomical success rate was 84.8% for the entire cohort at the 2-year follow-up. The cumulative anatomical or functional success rate for Groups B and C was significantly higher than that for Group A. In the multivariable model, a higher risk of failed DLDI surgery was associated with a history of chronic dacryocystitis (HR=3.07; p<0.001) and a longer duration of epiphora than 1 year (HR=2.67; p<0.001). Of the 522 eyes, 37 patients (7.1%) had surgery-related complications. DLDI is an effective minimally invasive technique for treatment in patients with distal NLDO or stenosis. Factors associated with a higher risk of reoperation include a longer duration of epiphora and a history of chronic dacryocystitis. NCT05999058.

Expandable Versus Static Cages for Transforaminal Lumbar Interbody Fusion in Degenerative Lumbar Spondylosis

Objective: Expandable cages have been used in lumbar interbody fusion in recent years. These cages allow a customizable fit within the intervertebral space, enabling surgeons to restore alignment and disc height. Various types of expandable cages are currently available. However, the benefits of expandable titanium cages remain unclear, with limited evidence.Methods: This prospective, single-center cohort study enrolled patients undergoing transforaminal lumbar interbody fusion with expandable or static cages by a single surgeon. Titanium expandable cages were used in the intervention group, while polyetheretherketone static cages were applied in the control group. The clinical and radiological outcomes were evaluated preoperatively and at 1, 3, and 6 months postoperatively. The fusion rate assessed by dynamic radiography was significantly higher for the expandable cage group than in the static cage group at a 6-month follow-up (95% vs. 65%). The radiological outcomes, including disc height index, segmental lordosis, and lumbar lordosis, were similar in the 2 groups. There was no significant difference in the subsidence rate.Results: There were 20 patients in each group, with similar patient characteristics. The visual analogue scales for back and leg pain significantly improved in both groups. There were no significant differences between the groups in clinical outcomes.Conclusion: The expanded cages led to comparable outcomes. The subsidence rate of the titanium expandable cages was similar to that of the static cages. The newly designed expandable cage may accelerate fusion by reducing iatrogenic injuries to the endplate.

Venous distensibility may be an indicator of early arteriovenous fistula failure, a retrospective single-centre cohort study

Background Arteriovenous-fistula (AVF) are crucial for hemodialysis access, yet they frequently experience early failure. While studies have identified potential patient and clinical risk factors, these findings remain inconsistent. This inconsistency might be attributed to the varying definitions of “early failure”. Our retrospective cohort study aimed to evaluate how common risk factors predict four frequently early-failure criteria: thrombosis/stenosis, <500 ml/min blood flow, <5 mm vein diameter, and ≥6 mm deep vein. We also assessed how well these risk factors predict early failure defined as meeting at least one of these criteria. Additionally, we examined the predictive ability of vein-distensibility, a previously overlooked factor in AVF failure. Methods Consecutive patients with first-time AVF employing standard minimum preoperative artery- and vein-diameters (1.8–2.0 mm) who underwent first Doppler-ultrasound (DUS) at ≤4 months in 2016–2022 were identified. Early AVF failure was defined as the presence of at least one of the following conditions on the first DUS: poor blood flow (Qa), poor vein diameter, poor vein depth, and thrombosis/stenosis. Factors associated with early AVF failure were explored with multivariate analyses. Results 105 patients were eligible and 63 (60%) had an early AVF failure. The only strong predictor of early failure was low vein-distensibility (Odds ratio = 0.57, 95% confidence intervals [CIs] = 0.38–0.83, p = 0.005). Female sex only predicted too-deep veins (Odds ratio = 14.29, 95% CIs = 2.00–100, p = 0.024). Conclusions venous distensibility may be a useful early-failure determinant when minimum preoperative vessel-diameter limits are met. Moreover, the female sex is associated with too-deep AVF veins.

Long-term complications of extracranial pericranial flaps in skull base reconstruction.

Nasoseptal flaps are a frequently used and well characterized means of reconstruction following endoscopic endonasal approach surgery (EEA). However, there are alternative means of reconstruction, including the extracranial pericranial flap (ePCF), that while used infrequently fulfill a specialized need in larger or salvage reconstructions. This review aims to better characterize long-term outcomes using ePCF where there is currently a paucity of objective data on use and outcomes. A traditional pericranial flap involves elevating and rotating the flap through a craniotomy defect to reconstruct defects of the ventral skull base. The ePCF is implemented without performing a craniotomy, and instead tunnels the flap through a bony opening created at the level of the nasion. This review presents outcomes in a large single-center cohort of patients with ePCFs to better characterize the short- and long-term success, risks, and complications of this reconstructive method. Long-term follow-up demonstrates that obstruction of the frontal sinus outflow may occur but rarely requires surgical intervention. ePCF are a reasonable alternative to consider in cases where local tissue would be insufficient, is not available, or has already failed. There is a low risk of flap complications.

Gastrointestinal Angiodysplasia Resolution After Transcatheter Aortic Valve Implantation

Heyde syndrome is the cooccurrence of aortic stenosis and gastrointestinal bleeding secondary to vascular lesions, including angiodysplasias. Several studies have demonstrated cessation of gastrointestinal bleeding after transcatheter aortic valve implantation (TAVI), but the etiology and effects on vascular lesions are largely unknown. To examine the associations of TAVI with gastrointestinal vascular lesions and identify factors associated with recovery among patients with iron deficiency anemia and severe aortic stenosis. In this prospective, single-center cohort study, patients with iron deficiency anemia on the TAVI waiting list from September 2020 to February 2022 were assessed by capsule endoscopy. Those with vascular lesions were reassessed 6 months after TAVI. Endoscopic images were anonymized and evaluated by 2 independent researchers. Data were analyzed from September 2022 to August 2024. TAVI. The primary outcome was the mean difference in the number of vascular lesions before vs after TAVI. A total of 24 patients (mean [SD] age, 77.4 [7.1] years; 18 [75.0%] male) underwent capsule endoscopy, and vascular lesions were present in 18 patients (75.0%). TAVI was performed in 15 of 18 patients with vascular lesions, of whom 11 agreed to a second capsule endoscopy. The mean (SD) number of vascular lesions across the gastrointestinal tract decreased from 6.4 (5.6) lesions before TAVI to 2.0 (2.1) lesions 6 months after TAVI (P = .04). The number of vascular lesions decreased in 9 of 11 patients (81.8%), including 6 patients (54.5%) who no longer had typical angiodysplasias. Resolution of angiodysplasias was less frequent in patients who had multiple valvular heart disease before TAVI (0 of 3 patients) vs those without multiple valvular heart disease (6 of 8 patients [75.0%]) and in patients with significant paravalvular leakage after TAVI (2 of 5 patients [40.0%]) vs those without significant leakage (4 of 6 patients [66.7%]). In this cohort study of 24 patients with iron deficiency anemia and severe aortic stenosis, angiodysplasias were present in 75.0% of patients. TAVI was associated with reduced size and number of angiodysplasias in these patients. These findings suggest that TAVI not only improves aortic stenosis but may also reduce gastrointestinal bleeding by resolving vascular lesions, offering a dual benefit for patients with Heyde syndrome.

Classifying histopathological growth patterns for resected colorectal liver metastasis with a deep learning analysis.

Histopathological growth patterns are one of the strongest prognostic factors in patients with resected colorectal liver metastases. Development of an efficient, objective and ideally automated histopathological growth pattern scoring method can substantially help the implementation of histopathological growth pattern assessment in daily practice and research. This study aimed to develop and validate a deep-learning algorithm, namely neural image compression, to distinguish desmoplastic from non-desmoplastic histopathological growth patterns of colorectal liver metastases based on digital haematoxylin and eosin-stained slides. The algorithm was developed using digitalized whole-slide images obtained in a single-centre (Erasmus MC Cancer Institute, the Netherlands) cohort of patients who underwent first curative intent resection for colorectal liver metastases between January 2000 and February 2019. External validation was performed on whole-slide images of patients resected between October 2004 and December 2017 in another institution (Radboud University Medical Center, the Netherlands). The outcomes of interest were the automated classification of dichotomous hepatic growth patterns, distinguishing between desmoplastic hepatic growth pattern and non-desmoplatic growth pattern by a deep-learning model; secondary outcome was the correlation of these classifications with overall survival in the histopathology manual-assessed histopathological growth pattern and those assessed using neural image compression. Nine hundred and thirty-two patients, corresponding to 3.641 whole-slide images, were reviewed to develop the algorithm and 870 whole-slide images were used for external validation. Median follow-up for the development and the validation cohorts was 43 and 29 months respectively. The neural image compression approach achieved significant discriminatory power to classify 100% desmoplastic histopathological growth pattern with an area under the curve of 0.93 in the development cohort and 0.95 upon external validation. Both the histopathology manual-scored histopathological growth pattern and neural image compression-classified histopathological growth pattern achieved a similar multivariable hazard ratio for desmoplastic versus non-desmoplastic growth pattern in the development cohort (histopathology manual score: 0.63 versus neural image compression: 0.64) and in the validation cohort (histopathology manual score: 0.40 versus neural image compression: 0.48). The neural image compression approach is suitable for pathology-based classification tasks of colorectal liver metastases.

Enhancement of Family-Centred Care Is Associated with a Reduction in Postmenstrual Age at Discharge in Preterm Infants

Background/Objectives: Long hospitalisation has been recognized as an independent risk factor for poor neurodevelopmental outcomes of preterm infants. Systematic training and early inclusion of parents in their preterm infant’s care is a strategy to shorten the length of hospital stay. We implemented an enhanced stepwise family-centred care program and assessed its effects on postmenstrual age (PMA) at discharge and parental satisfaction. Methods: This prospective single-centre longitudinal cohort study was carried out in a German level III neonatal unit from October 2020 to May 2023. Five consecutive 6-month cohorts (1 baseline and 4 intervention cohorts, 169 infants and their caregivers) were analysed. Results: Mean PMA at discharge did not change in the total cohort but declined significantly in patients without neonatal morbidities from baseline to cohort 4 (37.2 ± 1.4 to 36.1 ± 1.6 weeks; p = 0.036). Concomitantly, discharge with tube feeding raised from 2.4% to 74.1% (p &lt; 0.001) and discharge with home monitoring raised from 9.8% to 74.1% (p &lt; 0.001), while unplanned readmissions remained unchanged (p = 0.44). Parental satisfaction with time point of discharge increased non-significantly from baseline to cohort 4 (75.8% vs. 95.7%; Chi2 0.22). Conclusions: Discharge of preterm infants at a significantly lower PMA is feasible through enhancement of family-centred care and is very well accepted by parents.

Clinical implication of electrocardiogram change in patients experiencing lung transplantation with end stage lung disease

IntroductionEnd-stage lung disease causes cardiac remodeling and induces electrocardiogram (ECG) changes. On the other way, whether lung transplantation (LTx) in end-stage lung disease patients are associated with ECG change is unknown. The object of this study was to investigate ECG changes before and after LTx in end-stage lung disease patients and whether these changes had clinical significance.MethodThis was a single-center retrospective cohort study of 280 end-stage lung disease patients who consecutively underwent LTx at a tertiary referral hospital. ECG findings before LTx and within 1 week and 1, 3, and 6 months after LTx were obtained and analyzed. To find clinical meaning, the ECG at 1 month after LTx was analyzed according to 1-year survival (survivor vs non-survivor groups). Survival data were estimated using the Kaplan–Meier method.ResultsSignificant differences were observed in the PR interval, QRS duration, QT interval, QTc interval, and heart rate before LTx and 1 month after LTx; the PR interval, QRS duration, QTc interval, and heart rate were decreased. Particularly, the QTc interval was significantly decreased 1 month after LTx, whereas there was no significant change in the QTc interval from 1 to 6 months thereafter. The PR interval, QT interval, QTc interval, and heart rate were significantly different between the survivor and non-survivor groups. The serial changes in QTc interval before LTx and 1 and 3 months after LTx were also significantly different between the survivor and non-survivor groups (p = 0.040 after adjusting for age and body mass index). Upon dividing the patients based on the range of QTc interval change ≤ -8 ms, &amp;gt;-8–10 ms, &amp;gt;10–35 ms, &amp;gt;35 ms), the survival rate was significantly lower in the group whose QTc interval at 1 month after LTx decreased by &amp;gt; 35 m (p = 0.019).ConclusionLTx in patients with end-stage lung disease may induce ECG changes. Patients whose QTc interval at 1 month after LTx decreased by &amp;gt; 35 ms have a significantly higher 1-year mortality rate. Hence, these ECG changes may have clinical and prognostic significance.

Hemorrhages and risk factors in patients undergoing thromboprophylaxis in a respiratory critical care unit: a secondary data analysis of a cohort study

ObjectiveTo verify whether the bleeding risk assessment guidelines from the 9th American College of Chest Physicians (ACCP) are prognostic for respiratory intensive care unit (RICU) patients and to explore risk factors for hemorrhages, we conducted a secondary data analysis based on our previously published cohort study of venous thromboembolism.Patients and methodsWe performed a secondary data analysis on the single-center prospective cohort from our previous study. Patients admitted to the RICU at Beijing Chao-Yang Hospital from August 1, 2014 to December 31, 2020 were included and followed up until discharge.ResultsThe study enrolled 931 patients, of which 715 (76.8%) were at high risk of bleeding, while the remaining were at low risk. Of the total, 9.2% (86/931) suffered major bleeding, and no significant difference was found between the two risk groups (p = 0.601). High-risk patients had poor outcomes, including higher mortality and longer stays. Independent risk factors for major bleeding were APACHE II score ≥ 15; invasive pulmonary aspergillosis; therapeutic dose of anticoagulants; extracorporeal membrane oxygenation; and continuous renal replacement therapy. Blood transfusion not related to bleeding appeared to be an independent protective factor for major bleeding (OR 0.099, 95% CI 0.045–0.218, p < 0.001).ConclusionBleeding risk assessment models from the 9th ACCP guidelines may not be suitable for patients in RICU. Building a bleeding risk assessment model that is suitable for patients in all RICUs remains a challenge.Trial registration ClinicalTrials.gov: NCT02213978.

Comparison of 4.54% hypertonic saline and 20% mannitol for brain relaxation during auditory brainstem implantation in pediatric patients: a single-center retrospective observational cohort study

BackgroundMannitol is frequently utilized to achieve intracranial brain relaxation during the retrosigmoid approach for auditory brainstem implantation (ABI). Hypertonic saline (HS) is an alternative for reducing intracranial pressure; however, its application during ABI surgery remains under-investigated. We aimed to compare the efficacy and safety between HS and mannitol for maintaining brain relaxation.MethodsThis single-center retrospective cohort study included pediatric patients undergoing ABI surgery from September 2020 to January 2022 who received only 4.54% HS or 20% mannitol for brain relaxation. The analysis involved initial doses, subsequent doses, and dosing intervals of the two hyperosmolar solutions, as well as the time elapsed from meningeal opening to the first ABI electrode placement attempt. Additionally, the analysis encompassed electrolyte testing, hemodynamic variables, urine output, blood transfusion, second surgeries, adverse events, intensive care unit length of stay, and 30-day mortality.ResultsWe analyzed 68 consecutive pediatric patients; 26 and 42 in the HS and mannitol groups, respectively. The HS group exhibited a reduced rate of supplementary use (7.7% vs. 31%) and lower total urine volume. Perioperative outcomes, mortality, and length of intensive care unit stay did not exhibit significant between-group differences, despite transient increases in blood sodium and chloride observed within 2 h after HS infusion.ConclusionsIn pediatric ABI surgery, as an osmotherapy for cerebral relaxation, 4.54% HS demonstrated a lower likelihood of necessitating additional supplementation than 20% mannitol. Furthermore, the diuretic effect of HS was weak and the increase in electrolyte levels during surgery was temporary and slight.

Long-term prognosis after ST-elevation myocardial infarction according to the Canadian Cardiovascular Society classification of tissue injury severity in acute myocardial infarction

Abstract Background The recently proposed Canadian Cardiovascular Society (CCS) classification of acute myocardial infarction (MI) describes 4 stages of tissue injury identified by cardiac magnetic resonance imaging (CMR); 1) oedema without late gadolinium enhancement (LGE); 2) LGE without microvascular obstruction (MVO); 3) MVO; and 4) intramyocardial haemorrhage (IMH). Prior studies examining the relationship between these characteristics and outcomes are limited by variations in imaging and measurement techniques, in particular the distinction between MVO and IMH. The relationship between the proposed CCS classification of MI and outcomes has not been described. Purpose To explore the prognostic significance of the CCS classification of MI tissue injury in patients with ST-elevation MI (STEMI). Methods The British Heart Foundation MR-MI study was a prospective single-centre CMR cohort study in patients with STEMI (July 2011-November 2012). CMR was performed on a single Siemens MAGNETOM Avanto 1.5-Tesla scanner at 2 days post-STEMI. The imaging protocol included LGE and T2* mapping, allowing for the identification of infarct, MVO, and IMH. Follow-up for the occurance of major adverse cardiovascular events (MACE) (recurrent MI, ischaemic stroke and cardiovascular death) and a composite outcome of heart failure hospitalization/ICD implantation (HFH) or all-cause death was performed via electronic case note review. Results 246 patients had complete data for this analysis. Of these, 6 (2%) were CCS Stage 1, 105 (43%) were Stage 2, 33 (13%) were Stage 3, and 102 (41%) were Stage 4. Due to the low number in CCS stage 1, these patients were pooled with Stage 2 for the purposes of this analysis (CCS Stage 1/2). Average age was 58 (SD 11) years and 188 (76%) were male. With higher CCS stage, more patients were Killip class III/IV at presentation, had the LAD as culprit artery and had TIMI flow 0/1 pre-PCI. Patients with higher CCS stage had higher peak troponin-I and NT-proBNP, lower left ventricular function, higher left ventricular volumes and larger infarct size (Table). Median follow-up was 11.8 years. HFH or all-cause death occurred in 80 (33%) patients (22 HFH and 58 all-cause deaths), and MACE occurred in 63 (26%) patients (41 recurrent MI, 11 ischaemic stroke events, and 11 cardiovascular deaths). There were no significant differences in outcomes between CCS Stage 3 and CCS Stage 1/2 (Figure). Patients with CCS Stage 4 had a higher risk of HFH or all-cause death (HR 1.73, 95%CI 1.08-2.77; p=0.022) and MACE (HR 1.88, 95%CI 1.10-3.20; p=0.021) as compared with those in CCS Stage 1/2 (Figure). Conclusion The novel CCS classification of MI tissue injury identifies patients at the highest risk of adverse outcomes following STEMI. The relationship between the presence of IMH (CCS Stage 4) and adverse outcomes highlights the importance of T2* imaging in post-MI CMR protocols in order to identify this prognostically important biomarker.

Comparison of different calcium modification strategies for coronary calcified nodules: insights from optical coherence tomography

Abstract Background The optimal treatment strategy for coronary calcified nodules (CN) remains uncertain. Purpose We sought to compare the safety and efficacy of different calcium modification strategies for managing CN using optical coherence tomography (OCT). Methods In this single-center retrospective cohort study, consecutive patients undergoing OCT-guided percutaneous coronary intervention (PCI) for severely calcified lesions using rotational atherectomy (RA), orbital atherectomy (OA), or intravascular lithotripsy (IVL) between January 2017 and December 2022 were included. OCT analysis was performed through our institutional core-laboratory to identify CN, assess plaque characteristics, and evaluate post-stent optimization. Primary outcomes were minimum stent area (MSA) and MSA at CN site post-PCI. One-year target vessel failure (TVF), defined as a composite of cardiac death, target-vessel myocardial infarction, or ischemia-driven target vessel revascularization, was also recorded. Results Among a total of 154 patients with 158 lesions, CN was identified in 54 lesions (34.2%) and managed with RA (39%, n=21), OA (33%, n=18), or IVL (28%, n=15). The IVL group exhibited a larger minimal lumen diameter, maximum calcium arc, and maximum calcium thickness at baseline. Post-PCI OCT demonstrated comparable MSA (RA: 5.91 ± 0.33mm², OA: 5.94 ± 0.38mm², IVL: 6.46 ± 0.45mm²; p=0.61) and MSA at CN site (6.77 ± 0.49mm², 6.71 ± 0.51mm², 7.13 ± 0.59mm², respectively; p=0.87) after adjusting for procedural and morphologic factors among the groups. The incidence of TVF at one year was similar among the groups. Conclusions In patients undergoing PCI for severely calcified lesions with CN, comparable procedural and clinical outcomes can be achieved using RA, OA, or IVL. The equivalence across these techniques underscores a role for individualized decision-making integrating patient- and lesion-specific characteristics, as well as center expertise when selecting a treatment strategy for CN.OCT findings and clinical outcomes