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Gaceta médica de México

versión impresa ISSN 0016-3813

Resumen

CASTANEDO-CAZARES, Juan Pablo et al. Analysis of the digital unit as reference measurement fot the topical prescription in Mexico. Gac. Méd. Méx [online]. 2006, vol.142, n.1, pp.35-38. ISSN 0016-3813.

Introduction: Topical prescription unlike other dosage forms is generally considered an inaccurate procedure. The fingertip unit (FTU) is a proposed measure for dosing a topical drug. FTU is the amount of ointment obtained from a tube with a 5 mm diameter nozzle, applied from the distal skin-crease to the tip of the index finger. Objective: Asses FTU as a reference measure for topical prescription among the Mexican population. Methods: The length of the II hand fingertip was recorded in 324 individuals and the weight of 1 FTU and its covering surface was registered. Results: Average length of index fingertip was 24 mm (IC95 26.7-27.2) in males (n=40), and 24 mm (IC95 24.3-24.8) in females (n=50). One FTU weighed 0.45 g (IC95 0.41-0.48) in males (n=40), and 0.38 g (IC95 0.35-0.41) in females (n=50). One FTU covered 275 cm2 (IC95 255-294) in males (n=15), and 257 cm2 (IC95200-240) in females (n=15). Conclusion: FTU may be a helpful measure for dosing and supervising the administration of topical medications for both patients and dermatologists in Mexico.

Palabras llave : Fingertip unit; topical prescription; cream; ointment.

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