Efficiency of therapeutic plasma exchange in critically ill systemic rheumatologic diseases: A single-center 9-year experience

INTRODUCTION

Therapeutic plasma exchange (TPE), an effective method to eliminate harmful soluble mediators associated with tissue injury, serves as a crucial intervention for systemic rheumatologic diseases (SRDs). However, its value in critically ill SRDs remains uncertain. This retrospective study aims to evaluate the efficacy of TPE in SRDs.

METHODS

Critically ill SRD patients admitted to the department of intensive care unit of a large tertiary hospital receiving TPE from January 2011 to December 2019 were included.

RESULTS

A total of 91 critically ill SRD patients received TPE were enrolled. Their mean age was 47.67 ± 16.35 years with a female predominance (n = 68). Significant decrease in SOFA score post-TPE treatment was observed (p < 0.05). There were no TPE-related fatalities. Improvement was observed in 64 (70.32%) patients.

CONCLUSION

This study shows favorable clinical outcomes. TPE may be an acceptable treatment option for critically ill SRD patients.

Low levels of hemoglobin associate with critical illness and predict disease course in patients with ANCA-associated renal vasculitis

Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is a small vessel vasculitis often leading to critical illness by multi-organ failure. Data for patients with specifically ANCA-associated renal vasculitis requiring intensive care unit (ICU) supportive care are limited and have mainly focused on long-term renal and overall outcome. Particularly, data on critical illness during the initial course of disease are scarce and remain poorly determined. Therefore, the purpose of this retrospective study was to identify predictors of critical illness in a cohort of patients with ANCA-associated renal vasculitis. We retrospectively included a total number of 53 cases with confirmed ANCA-associated renal vasculitis between 2015 till 2020 in a single-center cohort study. We here identified an association between low hemoglobin levels and requirement of ICU supportive care in patients with ANCA-associated renal vasculitis. Furthermore, levels of hemoglobin below 9.8 g/dL at admission independently predicted prolonged requirement of ICU supportive care in critically ill patients with ANCA-associated renal vasculitis. These findings confirm that low levels of hemoglobin negatively affect short-term outcome and could further improve our current understanding for the role of anemia in ANCA-associated renal vasculitis.

Clinical Characteristics and Outcomes of Patients With ANCA-Associated Vasculitides in a Colombian Hospital

BACKGROUND/OBJECTIVE

Antineutrophil cytoplasmic antibody-associated vasculitides (AAVs) are uncommon systemic autoimmune diseases, of which few reports exist in Latin America. Our aim was to examine AAV evaluated in a high-complexity hospital in southwestern Colombia, with emphasis in severe forms.

METHODS

A medical records review study of 67 patients was performed, and data were collected from electronic registries. Moderate and severe AAVs were defined as the presence of life-threatening complications, unfavorable Birmingham Vasculitis Activity Score outcomes, and hospitalization requirements at the time of diagnosis and by the last follow-up, between 2011 and 2019. Clinical manifestations, treatment, and outcomes were evaluated. The AAV subtypes were compared.

RESULTS

A total of 67 cases were included. The majority were female (n = 44, 65.67%), and the median age was 52 (40-64) years. Granulomatosis with polyangiitis (GPA) was the most frequent with 42 patients (62.68%), followed by microscopic polyangiitis (MPA) and eosinophilic GPA, with 15 patients (22.38%) and 10 patients (14.92%), respectively. Forty-four patients (65.67%) presented pulmonary symptoms. The highest Birmingham Vasculitis Activity Score corresponded to MPA, with 21 (12-25) points. Fifteen patients (22.4%) were admitted to the intensive care unit throughout the course of the disease, of whom 10 had GPA. The longest stay and duration of mechanical ventilation were seen in MPA. The principal treatments were corticosteroids and cyclophosphamide, and the main outcome was end-stage renal disease.

CONCLUSIONS

In this cohort of AAV, most of cases corresponded to GPA, and pulmonary manifestations were the most common. Microscopic polyangiitis was the more severe subtype as it showed worse impairment in clinical characteristics and intensive care unit requirements.

Sepsis Mortality Is high in Patients With Connective Tissue Diseases Admitted to the Intensive Care Unit (ICU)

Objectives:

Patients with connective tissue diseases (CTD) such as systemic lupus erythematosus (SLE) have an increased risk for infections. This study investigated the outcome and characteristics of CTD patients under intensive care unit (ICU) treatment for sepsis.

Methods:

A single-center retrospective analysis was conducted and reviewed all patients with a CTD diagnosis admitted to the ICU of a university hospital for sepsis between 2006 and 2019. Mortality was computed and multivariate logistic regression was used to detect independent risk factors for sepsis mortality. Furthermore, the positive predictive value of ICU scores such as Sequential Organ Failure Assessment (SOFA) score was evaluated.

Results:

This study included 44 patients with CTD (mean age 59.8 ± 16.1 years, 68.2% females), most of them with a diagnosed SLE (61.4%) followed by systemic sclerosis (15.9%). 56.8% (n = 25) were treated with immunosuppressives and 81.8% (n = 36) received glucocorticoids. Rituximab was used in 3 patients (6.8%). The hospital mortality of septic CTD patients was high with 40.9%. It was highest among systemic sclerosis (SSc) patients (85.7%). SOFA score and diagnosis of SSc were independently associated with mortality in multivariate logistic regression (P = 0.004 and 0.03, respectively). The Simplified Acute Physiology Score II (SAPS II), SOFA and Acute Physiology and Chronic Health Evaluation II (APACHE II) scores were good predictors of sepsis mortality in the investigated cohort (SAPS II AUC 0.772, P = 0.002; SOFA AUC 0.756, P = 0.004; APACHE II AUC 0.741, P = 0.007).

Conclusions:

In-hospital sepsis mortality is high in CTD patients. SSc diagnoses and SOFA were independently associated with mortality. Additionally, common ICU scores were good predictors for mortality.

Outcome of Patients With Necrotizing Vasculitis Admitted to the Intensive Care Unit (ICU) for Sepsis: Results of a Single-Centre Retrospective Analysis

INTRODUCTION/BACKGROUND

Vasculitis patients have a high risk for infections that may require intensive care unit (ICU) treatment in case of resulting sepsis. Since data on sepsis mortality in this patient group is limited, the present study investigated the clinical characteristics and outcomes of vasculitis patients admitted to the ICU for sepsis.

METHODS

The medical records of all necrotizing vasculitis patients admitted to the ICU of a tertiary hospital for sepsis in a 13-year period have been reviewed. Mortality was calculated and multivariate logistic regression was used to determine independent risk factors for sepsis mortality. Moreover, the predictive power of common ICU scores was further evaluated.

RESULTS

The study included 34 patients with necrotizing vasculitis (mean age 69 ± 9.9 years, 35.3% females). 47.1% (n = 16) were treated with immunosuppressives (mostly cyclophosphamide, n = 35.3%) and 76.5% (n = 26) received glucocorticoids. Rituximab was used in 4 patients (11.8%).The in-hospital mortality of septic vasculitis patients was 41.2%. The Sequential Organ Failure Assessment (SOFA) score (p = 0.003) was independently associated with mortality in multivariate logistic regression. Acute Physiology And Chronic Health Evaluation II (APACHE II), Simplified Acute Physiology Score II (SAPS II) and SOFA scores were good predictors of sepsis mortality in the investigated vasculitis patients (APACHE II AUC 0.73, p = 0.02; SAPS II AUC 0.81, p < 0.01; SOFA AUC 0.898, p < 0.0001).

CONCLUSIONS

Sepsis mortality was high in vasculitis patients. SOFA was independently associated with mortality in a logistic regression model. SOFA and other well-established ICU scores were good mortality predictors.

Mortality of Sepsis in Patients With Rheumatoid Arthritis: A Single-Center Retrospective Analysis and Comparison With a Control Group

INTRODUCTION/BACKGROUND

Patients with rheumatoid arthritis (RA) have a high risk of infections that may require intensive care unit (ICU) admission in case of resulting sepsis. Data regarding the mortality of these patients are very limited. This study investigated clinical characteristics and outcomes of patients with RA admitted to the ICU for sepsis and compared the results to a control cohort without RA.

METHODS

All patients with RA as well as sex-, age-, and admission year-matched controls admitted to the ICU of a university hospital for sepsis between 2006 and 2019 were retrospectively analyzed. Mortality was calculated for both the groups, and multivariate logistic regression was used to determine independent risk factors for sepsis mortality. The positive predictive value of common ICU scores was also investigated.

RESULTS

The study included 49 patients with RA (mean age 67.2 ± 9.0 years, 63.3% females) and 51 matched controls (mean age 67.4 ± 9.5 years, 64.7% females). Among the patients with RA, 42.9% (n = 21) were treated with conventional synthetic (cs) disease-modifying antirheumatic drugs (DMARDs) and 30.6% (n = 15) received glucocorticoids only. Seven (14.3%) patients received biologic (b) DMARDs. The hospital mortality was higher among patients with RA (42.9% vs 15.7%, P = .0016). Rheumatoid arthritis was independently associated with mortality in multivariate logistic regression (P = .001). In patients with RA, renal replacement therapy (P = .024), renal failure (P = .027), and diabetes mellitus (P = .028) were independently associated with mortality. Acute Physiology and Chronic Health Evaluation II (APACHE II), Simplified Acute Physiology Score II (SAPS II), and Sequential Organ Failure Assessment (SOFA) scores were good predictors of sepsis mortality in patients with RA (APACHE II area under the curve [AUC]: 0.78, P = .001; SAPS II AUC: 0.78, P < .001; SOFA AUC 0.78, P < .001), but their predictive power was higher among controls.

CONCLUSIONS

Hospital sepsis mortality was higher in patients with RA than in controls. Rheumatoid arthritis itself is independently associated with an increased sepsis mortality. Renal replacement therapy, renal failure, and diabetes were associated with an increased mortality. Common ICU scores were less well predictors of sepsis mortality in patients with RA compared to non-RA controls.

Mortality of patients with rheumatoid arthritis requiring intensive care: a single-center retrospective study

BACKGROUND

Patients with rheumatoid arthritis (RA) are at a high risk for life-threatening conditions requiring admission to the intensive care unit (ICU), but the data regarding the outcomes of these patients is limited. The present study investigated the clinical characteristics and outcomes of RA patients admitted to an ICU.

METHODS

This retrospective cohort study included RA patients admitted to the general ICU of the Sheba Medical Center during 2002-2018. The main outcome was 30-day mortality. Using Student's t test, χ², and multivariable analyses, we compared the demographic, clinical, and laboratory parameters of the survivors and the non-survivors. Figures with p value < 0.05 were considered statistically significant.

RESULTS

Forty-three RA patients were admitted to the ICU during the study period (mean age, 64.0 ± 13.1 years; 74.4% female). The leading causes of ICU admission were infection (72.1%), respiratory failure (72.1%), renal failure (60.5%), and septic shock (55.8%). The 30-day mortality rate was 34.9%, with infection (9/15, 60%) as the most frequent cause. The mean Acute Physiology and Chronic Health Evaluation (APACHE) II and Sequential Organ Failure Assessment (SOFA) scores were 19.7 ± 12.5 and 7.0 ± 4.5, respectively. Multivariable analysis showed that heart failure (p = 0.023), liver failure (p = 0.012), SOFA score (p = 0.007), and vasopressor treatment in ICU (p = 0.039) were significantly associated with overall mortality. SOFA score was linked with overall mortality (area under the curve (AUC) = 0.781 ± 0.085, p = 0.003) and mortality from respiratory failure (AUC = 0.861 ± 0.075, p = 0.002), while APACHE II score was only correlated with mortality from infection (AUC = 0.735 ± 0.082, p = 0.032).

CONCLUSIONS

Our study demonstrated a relatively high mortality rate among RA patients who were admitted to the general ICU. RA patients with risk factors such as heart failure, liver failure, elevated SOFA score, and vasopressor treatment in ICU should be promptly identified and treated accordingly. Key Points • The 30-day mortality rate of patients with RA that were admitted to the general ICU of a tertiary hospital was 34.9%. • The most common causes of ICU admission among patients with RA were infections and respiratory failure. Infections were the most common cause of death among these patients. • Patients with RA that present to the ICU with heart failure, liver failure, elevated SOFA score, and/or require vasopressor treatment in ICU should be promptly identified and treated accordingly.

Borderline positive antineutrophil cytoplasmic antibodies (ANCA)-PR3/MPO detection in a large cohort tertiary center: lessons learnt from a real-life experience

BACKGROUND

Enzyme-linked immunosorbent assay (ELISA) and indirect immunofluorescence (IIF) are the best strategies for antineutrophil cytoplasmic antibodies (ANCA) detection. In a minority of subjects, ELISA-based ANCA testing may result in a borderline positive titre. Therefore, we assessed the clinical significance of such a result.

METHODS

This is a retrospective study, which included all subjects screened for ANCA subtypes (myeloperoxidase (MPO) or proteinase-3 (PR3)) with subsequent identification of borderline positive results, as determined by ELISA and retested using IIF. The demographic, clinical and laboratory data of subjects with borderline positive ANCA test results were extracted from their medical records.

RESULTS

A total of 14,555 PR3/MPO-ANCA tests were performed with ELISA during the study period (2006-2016). Of the 14,555 PR3-ANCA antibody tests that were performed, 94 were borderline positive (titre 0.9-1.1), and of 14,555 MPO-ANCA antibody tests, 43 were borderline positive (titre 0.9-1.1). The male-to-female ratio was 1:1.08 and the mean age was 50.95±21.79 years. Four MPO-ANCA (9.30%) and 11 PR3-ANCA (11.70%) antibody borderline samples resulted positive on IIF testing. Subjects with borderline positive MPO-ANCA were found to have a poorer outcome in terms of renal failure and the requirement of dialysis.

CONCLUSIONS

Subjects with borderline positive MPO-ANCA and positive p-ANCA (IIF) seem to have a less favorable outcome. Physicians should be aware of these findings and possibly perform a closer follow-up and routine screening for these subjects.

Patients with systemic rheumatic diseases admitted to the intensive care unit: what the rheumatologist needs to know

Patients with systemic rheumatic diseases (SRDs) may require admission to the intensive care unit (ICU) throughout the course of their disease. Therefore, the rheumatologist needs an understanding of the factors which may influence the course of patients with SRDs who are admitted to ICU. These include the causes for admission, patient characteristics including comorbidities and drug therapies, outcome (in-ICU mortality and causes of death), and prognostic factors. Infections and exacerbation/complications of SRDs are the most common (and potentially reversible) reasons for both admission and death on ICU. Mortality in patients with SRDs admitted to ICU has been reported to be either no different or higher than 'general' ICU patients. Reported prognostic factors included patient and disease characteristics, as well as ICU factors, including scoring systems. Rheumatologists need to be aware of the factors surrounding admission of patients with SRDs to ICU, including the need for strong links with critical care medicine.