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  • Title: Systemic iodine absorption associated with the use of preoperative ophthalmic antiseptics containing iodine.
    Author: Razavi B, Zollinger R, Kramer A, Fricke C, Völzke H, Jäger B, Spielhagen C, Behrens-Baumann W, Below H.
    Journal: Cutan Ocul Toxicol; 2013 Oct; 32(4):279-82. PubMed ID: 23528074.
    Abstract:
    BACKGROUND: Polyvinylpyrrolidone-Iodine (PVP-I) is routinely used as preoperative antiseptic during ophthalmic surgery. Iodine absorption from iodine-containing antiseptics can lead to the development of thyroid disorders. Therefore, a quantitative measurement of iodine absorption from these antiseptics was performed in patients undergoing elective cataract surgery. METHODS: This study enrolled 241 patients to evaluate systemic iodine absorption after exposure to conjunctival and/or periorbital 1.25% and 10% PVP-I compared to an iodine-free antiseptic. RESULTS: All patients who received the 10% PVP-I regardless of the application site showed a 1.2-1.5-fold increase in urinary iodine excretion after 24 h (p = 0.01). In 17 out of 110 (15.5%) patients in whom 10% PVP-I was used, the critical threshold of urinary iodine excretion as defined by WHO (>300 µg/L) was exceeded. In contrast, no significant ioduria was observed with the use of 1.25% PVP-I except in patients after 48 h (p = 0.01) and with a concurrent conjunctival and periorbital application. The proportion of the excreted iodine in urine ranged from 0.24% to 1.77%. No correlation was found between the total applied concentration of iodine and the amount excreted in urine. CONCLUSION: Based on our findings, we believe that the use of 10% PVP-I as preoperative ophthalmic antiseptic should undergo further clinical evaluation in regard to its impact on thyroid function. Conjunctival or periorbital application of 1.25% PVP-I does not result in significant ioduria.
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