Salivary Conductivity Screening for Dry Eye Disease and Sjögren's Syndrome

Summary

Dry eye disease, or keratoconjunctivitis sicca, is one of the most common diseases encountered at ophthalmologic clinics. Patient with dry eye disease commonly presented foreign body sensation, red eye, blurred vision, etc. Numerous treatments for dry eye disease are proposed due to its multifactorial etiology. Sjögren syndrome, which is one of the main etiologies of dry eye disease, is an autoimmune disease characterized by dysfunction of lacrimal and salivary glands. Although dry eye status can be easily examined by ocular surface staining, the methods quantifying salivary flow rate are hard to performed clinically, such as salivary gland scintigraphy and sialometry. Furthermore, disease activity could only rely on serum markers or salivary gland ultrasound. Recently, a portable device measuring salivary conductivity is believed to assess fluid status and renal function. Interestingly, the composition of salivary electrolytes in patients with Sjögren syndrome is different from those with other causes of hyposalivation. Thus, this study aims to evaluate whether salivary conductivity in combination with ocular surface staining can be a non-invasive diagnostic test for primary Sjögren syndrome among people with dry eye disease.

Eligibility

Inclusion Criteria:

1. Adults aged 20 and older
2. Patients with normal and dry eye syndrome

Exclusion Criteria:

1. Hepatitis C
2. Acquired immunodeficiency syndrome
3. Lymphoma
4. Intestinal amyloidosis
5. Open pulmonary tuberculosis
6. Graft-versus-host disease
7. Rheumatoid or lupus erythematosus and other autoimmune diseases
8. IgG4-related diseases
9. Head and neck radiation therapy
10. Glaucoma
11. History of infectious keratitis
12. History of ophthalmic surgery
13. Wear contact lenses in the month before the trial
14. Chew betel nuts or smoke within one month before the trial

Conditions3

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