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Inicio Archivos de la Sociedad Española de Oftalmología (English Edition) Tear clearance and ocular symptoms in patients treated with preservative-free pr...
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Vol. 88. Issue 3.
Pages 88-91 (March 2013)
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Vol. 88. Issue 3.
Pages 88-91 (March 2013)
Original article
Tear clearance and ocular symptoms in patients treated with preservative-free prostaglandins
Aclaramiento lagrimal y sintomatología ocular en pacientes tratados con prostaglandinas sin conservantes
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R. Giménez-Gómez, M.R. García-Catalán
Corresponding author
rociogarciacatalan@gmail.com

Corresponding author.
, J.M. Gallardo-Galera
Servicio de Oftalmología, Hospital Reina Sofía, Córdoba, Spain
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Table 1. Lachrymal dynamics parameters before and after changing treatment.
Abstract
Objectives

To assess the effects of switching from a prostaglandin with a preservative to a preservative-free prostaglandin on dry eye symptoms and tear dynamics.

Material and methods

Fourteen patients (N=28 eyes) with open-angle glaucoma and dry eye symptoms, treated with preserved latanoprost, travoprost or bimatoprost were included in this uncontrolled prospective study. Ocular symptoms were analyzed using a validated ocular surface disease questionnaire and ocular signs were assessed with tear clearance, Schirmer and tear function index test (TFI=Schirmer/clearance). Patients were assigned to preservative-free tafluprost treatment, and measurements were repeated 4 weeks after change of medication. Wilcoxon test and Spearman correlation coefficient were used in the statistical analysis.

Results

No statistically significant difference in intraocular pressure (IOP) was observed after switching to tafluprost. Mean IOP at baseline was 20.4mmHg (SD 2.2) and after 4 weeks 19.9mmHg (SD 2.6) (p>0.05). The mean questionnaire score significantly decreased from 9.7 (SD 3.7) at baseline to 5.4 (SD 2.7) after one month (p<0.001). No significant differences in tear clearance, Schirmer or TFI were found (p>0.05). At baseline, it was found that tear clearance=0.13 (SD 0.07), Schirmer=10.7mm (SD 6) and TFI=80 (48–156), while after 4 weeks, it was found that tear clearance=0.1 (SD 0.07), Schirmer=9.5mm (3.9) and TFI=104 (48–216). A significant association between questionnaire score and tear clearance after 4 weeks was observed (Spearman coefficient=0.62; p=0.014).

Conclusions

Switching from preservative prostaglandin with a preservative to preservative-free tafluprost treatment improves dry eye symptoms and suggests an improvement in TFI.

Keywords:
Tafluprost
Prostaglandins
Tear function index
Clearance
Preservatives
Resumen
Objetivos

Evaluar el efecto en los síntomas de sequedad ocular y en la dinámica lagrimal que se produce al sustituir una prostaglandina con conservante por una prostaglandina sin conservante.

Material y métodos

Estudio prospectivo no controlado en el que se seleccionaron 28 ojos de 14 pacientes con síntomas de ojo seco en tratamiento con latanoprost, travoprost o bimatoprost con conservante. Se evaluaron los síntomas oculares con un cuestionario validado de enfermedad de la superficie ocular y los signos mediante el test de aclaramiento lagrimal, el Schirmer y el índice de función lagrimal (TFI, TFI=Schirmer/Aclaramiento). En todos los pacientes se cambió el tratamiento hipotensor a tafluprost sin conservante. Al mes, se repitieron los tests. En el análisis estadístico se utilizó el test de Wilcoxon y el coeficiente de correlación de Spearman.

Resultados

No encontramos diferencias en la presión intraocular (PIO) al cambiar a tafluprost. La PIO inicial era 20,4mmHg (DE 2,2) y la PIO al mes era 19,96mmHg (DE 2,6) (p>0,05). La puntuación del cuestionario disminuyó de forma significativa desde 9,7 (DE 3,7) a 5,4 (DE 2,7) al mes del tratamiento (p<0,001). No encontramos diferencias significativas en el aclaramiento, en el Schirmer, ni en el TFI (p>0,05). Inicialmente, Aclaramiento=0,13 (DE 0,07), Schirmer=10,7mm (DE 6) y TFI=80 (48-156). Al mes, Aclaramiento=0,1 (DE 0,07), Schirmer=9,5mm (DE 3,9) y TFI=104 (48-216). Hemos encontrado una asociación significativa entre la puntuación del cuestionario y el aclaramiento al mes (coeficiente de correlación=0,62; p=0,014).

Conclusiones

La sustitución de una prostaglandina con conservante a tafluprost sin conservante mejora los síntomas de sequedad ocular y sugiere una mejoría en el test de función lagrimal.

Palabras clave:
Tafluprost
Prostaglandinas
Índice de función lagrimal
Aclaramiento
Conservantes

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