A method for testing body fluids is disclosed. The method includes providing a media-dispensing apparatus, placing at least the distal opening of the elongated tubular member adjacent body fluid (e.g., near a patient's abdomen) or adjacent a medical device such that a portion of the media strip contacts body fluid or the medical device, and advancing the media strip such that the portion of the media strip that contacted the body fluid or the medical device advances at least through the second lumen. Additionally, the step of cutting the media strip with a cutting instrument is also disclosed.