Evaluación de la efectividad de una intervención para mejorar las coberturas vacunales en pacientes esplenectomizados

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Abstract

RESUMEN Fundamentos: Los pacientes esplenectomizados presentan riesgo elevado de sepsis por bacterias encapsuladas, motivo por el que se recomienda vacunarles frente a neumococo, meningococo y Haemophilus inﬂuenzae B. El objetivo de nuestro trabajo fue evaluar el impacto de implementar una consulta hospitalaria de vacunas en sus coberturas de vacunación. Métodos: Estudio cuasiexperimental. Constituyeron el grupo control los esplenectomizados entre enero 2012-abril 2014, y el grupo intervención los operados entre mayo 2014-diciembre 2016. Se compararon las coberturas vacunales global y específica para cada vacuna según grupo utilizando la prueba chi-cuadrado. Resultados: Se analizaron 80 pacientes. La vacuna más administrada fue la antineumocócica polisacárida 23-valente (65%). Hubo una mejora significativa en la tasa de vacunación global (17,1% en el periodo preintervención versus 57,8% en el postintervención) (RR=3,37; IC95%:1,56-7,27) así como específicamente para las vacunas frente a Haemophilus influenzae de tipo B, antimeningocócica C y antineumocócica conjugada 13-valente. Conclusiones: Implementar una consulta hospitalaria de vacunas representa una medida efectiva para mejorar las coberturas vacunales de estos pacientes.

Translated abstract

ABSTRACT Background: Splenectomized patients have an increased risk of sepsis caused by encapsulated bacteria. Pneumococcal, meningococcal and Haemophilus influenzae B vaccination is recommended in this group. The aim of our study was to assess the impact of the introduction of an immunization hospital clinic on their immunization coverages. Methods: Quasi-experimental study. The control group included patients splenectomized between January 2012-April 2014, and the intervention group included patients splenectomized between May 2014-December 2016. The global and specific immunization coverages were compared between both groups using a Chi-square test. Results: 80 patients were analyzed. The most commonly administered vaccine was the 23-valent pneumococcal polysaccharide vaccine (65%). A significant improvement was observed both in the global immunization rate (17.1% in the pre-intervention study vs. 57.8% in the post-intervention study) (RR: 3.37; 95% CI: 1.56-7.27) and in the specific immunization rate for the Haemophilus influenzae B, meningococcal C and 13-valent pneumococcal conjugate vaccines. Conclusions: Introducing an immunization hospital clinic is an effective measure to improve the immunization coverage of splenectomy patients.

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Overwhelming post-splenectomy sepsis in patients with asplenia and hyposplenia: a retrospective cohort study

J. Chong, P. Jones, D Spelman … (2017)

Overwhelming post-splenectomy infection (OPSI) is a serious complication of asplenia and is associated with encapsulated organisms, most commonly Streptococcus pneumoniae, but also Haemophilus influenzae and Neisseria meningitidis. We aimed to estimate the risk of infection in this patient group. We reviewed data collected by the Victorian Spleen Registry in Australia. On registration, all patients are asked about significant infections requiring admission to hospital for intravenous antibiotics; those requiring admission to ICU were defined as OPSI. In the 3274 asplenic patients registered 492 patients reported at least one episode of infection. There were 47 episodes of OPSI requiring intensive care (incidence rate 1·11/1000 patient-years). The risk of OPSI was highest in older patients, and there were no statistically significant differences in incidence by reason for splenectomy except for a higher rate in patients with medical hyposplenia. This study reinforces that post-splenectomy infection is a clinically significant but uncommon complication, and that fulminant infection requiring intensive care is a minority of all infections.

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Active offer of vaccinations during hospitalization improves coverage among splenectomized patients: An Italian experience.

Maria Serena Gallone, Carmen Martino, Michele Quarto … (2017)

In 2014, an Italian hospital implemented a protocol for pneumococcal, meningococcal, and Haemophilus influenzae type b vaccines offer to splenectomized patients during their hospitalization. After 1 year, coverage for recommended vaccinations increased from 5.7%-66.7% and the average time between splenectomy and vaccines administration decreased from 84.7-7.5 days.