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ObjectiveTo explore the risk factors of capillary leakage syndrome in patients with acute organophosphorus pesticide poisoning (AOPP), in order to provide reference for clinical screening and intervention timing.MethodsThe clinical manifestations, auxiliary examination and prognosis of AOPP patients admitted in Fuyang People's Hospital from November 2020 to June 2022 were prospectively analyzed, and the patients were divided into non-CLS group and CLS group based on the presence or absence of capillary leak syndrome (CLS). Patients were admitted to hospital as the starting point, and death or discharge as the endpoint. Multiple Logistic regression analysis was used to explore the risk factors of AOPP complicated with CLS.ResultsA total of 38 AOPP patients were included, of which 17 (44.7%) were complicated with CLS. There were statistical differences in age (P=0.015), blood concentration of dichlorvos (P=0.001), blood concentration of dipterex(P < 0.001), creatinine (P < 0.001) and APACHEⅡ score (P < 0.001) between non-CLS group and CLS group. Multivariate Logistic regression analysis showed that blood concentration of dipterex ≥0.44 μg/mL and APACHEⅡ score≥10.5 were independent risk factors for AOPP complicated with CLS. The mortality rate of CLS group was higher than that of CLS group (P < 0.001).ConclusionsPatients with AOPP are more likely to be complicated by CLS, and the mortality rate is higher. High-risk patients can be identified early by dipterex blood concentration and APACHE Ⅱ score, and early intervention can be carried out to improve the prognosis of patients.

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Capillary leak syndrome (CLS) is a clinical syndrome characterized by impairment of vascular endothelial barrier function, increased vascular permeability, and reversible systemic edema. It is one of the early fatal complications after hematopoietic stem cell transplantation. So far, the exact pathogenesis of CLS has not been elucidated, and the diagnostic criteria and treatment methods have not been unified. At present, it is believed that the fundamental cause of CLS is hypercytokinemia, and the core factor is high permeability of vascular endothelial cells. According to the clinical manifestations, the natural course of CLS can be divided into prodrome, leakage and recovery stages. As far as treatment is concerned, symptomatic and supportive treatment is dominant according to different characteristics of each stage. In this review, the pathogenesis, clinical manifestations, diagnosis and treatment of hematopoietic stem cell transplant-associated CLS were briefly summarized.

Objective: To investigate the clinical characteristics of secondary hemophagocytic lymphohistiocytosis (sHLH) complicated with capillary leak syndrome (CLS) . Methods: The clinical and laboratory data of 87 sHLH patients, who were treated in our hospital between January 2015 and December 2017, were retrospectively analyzed. Depending on whether they were complicated with CLS, 21 sHLH patients were classified as the CLS-sHLH group, while 66 were classified as the non-CLS-sHLH group. The differences of clinical manifestations, laboratory tests, treatment and prognosis between the two groups were compared. Results: There was no significant difference in the etiology of sHLH between the CLS-sHLH group and the non-CLS-sHLH group ( P >0.05) . The neutrophil, fibrinogen and albumin levels in the CLS-sHLH group were lower than those in the non-CLS-sHLH group, while the triacylglycerol levels were higher than those in the non-CLS-sHLH group ( P <0.05) . Varying degrees of edema, weight gain, hypotension, hypoproteinemia, oliguria and multiple serous effusions were observed in the CLS-sHLH group. Among them, there were 15 patients that CLS get improved, and the medial time of improvement was 7 (5-14) days. The other 6 patients did not get remission, while they died within 6-30 days. The median overall survival of the CLS-sHLH group was lower than that of the non-CLS-sHLH group (75 days vs not reached, P =0.031) . Conclusions: There may be no correlation between the cause of sHLH and the occurrence of CLS. Severity of neutropenia, fibrinogen and albumin levels, and triglyceride levels may be accompanied for sHLH patients complicated with CLS. Patients with sHLH who complicated with CLS have a poor prognosis. Active treatment of HLH and its primary disease, reasonable fluid replacement and oxygen supply are crucial, which can effectively control disease progression.