Objetivos Identificar precozmente y analizar las características de pacientes que precisan ingreso por bronquiolitis moderada o grave que cumplen criterios urinarios de SIADH.
Pacientes y métodos Estudio prospectivo observacional, realizado entre octubre de 2012-marzo de 2013 en urgencias pediátricas. Se incluyen menores de 12 meses con bronquiolitis moderada o grave que requieren ingreso. Se consideran criterios urinarios de SIADH: sodio urinario≥40mmol/l, osmolaridad urinaria>500 mOsm/kg y densidad urinaria>1.020g/l. Se recogen variables epidemiológicas y clínicas y se comparan 2 grupos definidos por cumplir o no criterios urinarios de SIADH.
Resultados Se incluyen 126 pacientes con bronquiolitis moderada, 23 (18,6%) cumplen criterios urinarios de SIADH, ninguno grave ni menor de un mes. Los pacientes con criterios urinarios de SIADH tienen mayor incidencia de neumonía y/o atelectasia en la radiografía de tórax (21,7% vs. 1,9%; p=0,002), peor respuesta al tratamiento con adrenalina (69,5% vs. 28,1%; p=0,016), mayor asistencia respiratoria: oxigenoterapia de alto flujo (17,4% vs. 7,7%; p=0,016) y ventilación mecánica no invasiva (13% vs. 5,8%; p=0,034). Requieren más días oxigenoterapia (p=0,02) y tratamiento broncodilatador (p=0,04) y mayor ingreso en cuidados intensivos pediátricos (26,1% vs. 6,8%; p=0,007).
Conclusiones Los pacientes mayores de 1 mes con bronquiolitis moderada y con criterios urinarios de SIADH tienen peor evolución respiratoria, mayor necesidad de soporte respiratorio, ingreso en UCIP y más alteraciones radiográficas. Por ello recomendamos realizar determinaciones de orina a estos pacientes para detectar precozmente el desarrollo de SIADH y cuidar el manejo hidroelectrolítico, previniendo el desarrollo de complicaciones potencialmente graves.
Objectives To identify clinical characteristics that may lead to the early recognition of patients admitted to the hospital for moderate-to-severe bronchiolitis with urine results associated with the syndrome of inappropriate antidiuretic hormone secretion (SIADH).
Patients and methods A prospective observational study was conducted, spanning the bronchiolitis epidemic season (October 2012-March 2013), including all children who were admitted to the hospital with a diagnosis of moderate-to-severe bronchiolitis. The following criteria were used to establish a diagnosis of SIADH: urine sodium level of 40mmol/L or greater, urine osmolarity above 500 mosm/Kg, and urine density of 1020g/L or greater. Demographic characteristics, ventilation mode and clinical outcome were also analyzed. A comparison was made between those patients that met urine SIADH criteria and those who did not.
Results A total of 126 children were included, and 23 (18.6%) of them had urine SIADH criteria. Patients in this group had a higher incidence of pneumonia and/or atelectasis on chest X-Ray (21.7% vs. 1.9%, P=.002), worse response to bronchodilator treatment with nebulized adrenaline (69,5% vs. 28,1%, P=.016), more need for respiratory assistance (high flow oxygen therapy (17.4% vs. 7.7%, p=.016), or non-invasive mechanical ventilation (13% vs. 5.8%, P=.034), and more admissions to the PICU (26.1% vs. 6.8%, P=.007).
Conclusions Patients older than one month with acute moderate bronchiolitis and urine SIADH criteria have worse clinical courses and more need for non-invasive mechanical ventilation, PICU admission, and have a higher incidence of pneumonia on chest X-ray. For that reason, it is recommended to collect a urine sample from these patients to allow an early diagnosis of SIADH, and thus early treatment of fluid and electrolyte abnormalities.
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