instilaban
Imperfect ellos/ellas/ustedes conjugation of instilar.

instilar

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La inyección de contraste intracoronario se realizó manualmente y en cada una de ellas se instilaban entre 5 a 10 ml del colorante.
The intracoronary contrast injection was made manually and in each of them between 5 and 10 ml of dye were instilled.
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