Conjunctivitis and Total IgE in Lacrimal Fluid : Lacrytest Screening
Monzón, Susana (Universitat Autònoma de Barcelona. Departament de Medicina)
Arrondo, Elena (Hospital Universitari MútuaTerrassa (Terrassa, Catalunya))
Bartra, Joan (Universitat Autònoma de Barcelona. Departament de Medicina)
Torres, Ferran (Hospital Clínic i Provincial de Barcelona)
Basagaña, Maria (Universitat Autònoma de Barcelona. Departament de Medicina)
San Miguel, M. del Mar (Universitat Autònoma de Barcelona. Departament de Medicina)
Alonso, Rosario (Universitat Autònoma de Barcelona. Departament de Medicina)
Cisteró-Bahima, Anna (Universitat Autònoma de Barcelona. Departament de Medicina)
Universitat Autònoma de Barcelona. Departament de Medicina

Fecha:	2009
Resumen:	Total tear IgE has been considered to play an important role in allergic conjunctivitis, and measurement has been considered useful for diagnosis. The aim of this study was to ascertain whether Lacrytest ®, a new commercialised method to detect IgE levels in lacrimal fluid, could constitute a screening test for the diagnosis of allergic conjunctivitis. This was a cross-sectional study. Patients with seasonal and perennial allergic conjunctivitis, vernal keratoconjunctivitis and a control group were included. Clinical history, ophthalmic examination, skin prick test and conjunctival provocation test were obtained. Lacrytest ® was later performed in all groups. Fifty-four patients were enrolled: thirty with IgE-mediated conjunctivitis and, nine with vernal keratoconjunctivitis and fifteen controls. Lacrytest ® was negative in all controls, positive in 20% of the IgE-mediated conjunctivitis group and in 88. 9% of the vernal keratoconjunctivitis group. Global statistically-significant differences were found among the three groups (P =. 003). Sensitivity of the test in the IgE-mediated conjunctivitis group was 20%, specificity 100%, positive predictive value 100%, and negative predictive value 38. 46%, while in VKC sensitivity was 88. 88%, specificity 100%, positive predictive value 100%, and negative predictive value 93. 75%. Our data confirm that this test is not useful for screening allergic conjunctivitis. Lacrytest ®, while not providing any useful information to an allergist, could be helpful for ophthalmologists to confirm an IgE-mediated or VKC conjunctivitis.
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Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Publicado en:	Journal of Allergy, Vol. 2009 (4 2009) , ISSN 1687-9791

DOI: 10.1155/2009/518903
PMID: 20975798

6 p, 565.6 KB

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