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Agreement between capillary and venous lactate in emergency department patients: prospective observational study.

ABSTRACT: OBJECTIVES:Capillary blood lactate testing with handheld analysers has great advantages to reduce the time needed for clinical decisions, and for extended use in the prehospital setting. We investigated the agreement of capillary lactate measured using handheld analysers (CL-Nova and CL-Scout+ measured by Nova and Lactate Scout+ analyzers) and the reference venous level assessed using a point-of-care testing (POCT) blood gas analyser (VL-Ref). DESIGN:A prospective observational study. SETTING:A university teaching hospital emergency department in Hong Kong. PARTICIPANTS:Patients triaged as 'urgent' (Category 3 of a 5-point scale), aged ?18 years during 2016 were eligible. 240 patients (mean age 69.9 years) were recruited. PRIMARY AND SECONDARY OUTCOME MEASURES:The primary outcome measure was the agreement of the capillary blood lactate level measured by handheld lactate analyser when compared with the reference standard technique, namely venous blood samples obtained by venepuncture and analysed using the blood gas analyser. The secondary outcome measure was the difference in values of venous lactate using blood gas analysers and handheld lactate analysers. RESULTS:The results of VL-Ref ranged from 0.70 to 5.38?mmol/L (mean of 1.96?mmol/L). Regarding capillary lactate measurements, the bias (mean difference) between VL-Ref and CL-Scout+ was -0.22 with 95% limits of agreement (LOA) of -2.17 to 1.73?mmol/L and the bias between VL-Ref and CL-Nova was 0.46, with LOA of -1.08 to 2.00?mmol/L. For venous lactate, results showed the bias between VL-Ref and VL-Scout+ was 0.22 with LOA being -0.46 to 0.90?mmol/L, and the bias between VL-Ref and VL-Nova was 0.83?mmol/L with LOA -0.01 to 1.66?mmol/L. CONCLUSION:Our study shows poor agreement between capillary lactate and reference values. The study does not support the clinical utility of capillary lactate POCT. However, venous lactate measured by Scout+ handheld analyser may have potential for screening patients who may need further testing. TRIAL REGISTRATION NUMBER:NCT02694887.

SUBMITTER: Graham CA

PROVIDER: S-EPMC6500234 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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Project description:ObjectiveTo assess the role of sex in the presentation and management of children attending the emergency department (ED).DesignThe TrIAGE project (TRiage Improvements Across General Emergency departments), a prospective observational study based on curated electronic health record data.SettingFive diverse European hospitals in four countries (Austria, The Netherlands, Portugal, UK).ParticipantsAll consecutive paediatric ED visits of children under the age of 16 during the study period (8-36 months between 2012 and 2015).Main outcome measuresThe association between sex (male of female) and diagnostic tests and disease management in general paediatric ED visits and in subgroups presenting with trauma or musculoskeletal, gastrointestinal and respiratory problems and fever. Results from the different hospitals were pooled in a random effects meta-analysis.Results116 172 ED visits were included of which 63 042 (54%) by boys and 53 715 (46%) by girls. Boys accounted for the majority of ED visits in childhood, and girls in adolescence. After adjusting for age, triage urgency and clinical presentation, girls had more laboratory tests compared with boys (pooled OR 1.10, 95% CI 1.05 to 1.15). Additionally, girls had more laboratory tests in ED visits for respiratory problems (pooled OR 1.15, 95% CI 1.04 to 1.26) and more imaging in visits for trauma or musculoskeletal problems (pooled OR 1.10, 95% CI 1.01 to 1.20) and respiratory conditions (pooled OR 1.14, 95% CI 1.05 to 1.24). Girls with respiratory problems were less often treated with inhalation medication (pooled OR 0.76, 95% CI 0.70 to 0.83). There was no difference in hospital admission between the sexes (pooled OR 0.99, 95% CI 0.95 to 1.04).ConclusionIn childhood, boys represent the majority of ED visits and they receive more inhalation medication. Unexpectedly, girls receive more diagnostic tests compared with boys. Further research is needed to investigate whether this is due to pathophysiological differences and differences in disease course, whether girls present signs and symptoms differently, or whether sociocultural factors are responsible.

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Agreement between capillary and venous lactate in emergency department patients: prospective observational study.

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