A medical diagnostic apparatus including a catheter and a probe assembly coupled to the catheter and a method involving the use of a catheter and a probe assembly coupled to the catheter. The sanitary absorbent device holder is adapted to hold a sanitary absorbent device such as a tampon or sanitary napkin in a discreet or concealed manner as the undergarment is worn by a user. Further, the method determines whether a result of a query exceeds any one of the item access rates defined in the profile associated with the user. Therefore, only the flow cell volume needs to be displaced during injection of sample in order to achieve 100% transition to sample within the flow cell. The insulation is readily applied to a reusable launch vehicle via a silicone adhesive. The screens being integral with a foldable support having two configurations, namely a folded detection configuration, in which the screens are stacked on one another, and an unfolded reading configuration, in which the screens are arranged alongside one another on the same face of the support.