Abstract: A delivery device such as an infusion set or patch pump is configured for delivering a pharmaceutical agent, such as insulin, to a patient. The infusion set or patch pump has a bottom surface pH indicator capable of producing a color change upon contact with the pharmaceutical agent. The pH indicator in one embodiment is bromothymol blue that is able to exhibit a color change when contacting an insulin solution to produce a rapid visually detectable color change.

Abstract: A medical device, such as a catheter, for use in medical applications includes an elongated body (26) with a tip having an opening (32) at one end. The catheter tip is configured to inhibit occluding and to permit outflow of fluid medication from the catheter to ensure proper delivery of the medication to an intended target area. The tip of the catheter is constructed to have at least one beveled end surface (42) to assist insertion into the patient and a radial thickness (49) at a critical bend point substantially equal to the radius (41) of the fluid path (36) and at a location spaced from the end a distance substantially equal to the radius of the fluid path to inhibit folding and occluding the catheter during use.