Diagnostic Catheters are used in coronary catheterization and percutaneous transluminal coronary angioplasty (PTCA) procedures. Diagnostic catheters are designed for improved pushability, increased flow rates and torque control. Diagnostic catheters are used during cardiac catheterization for diagnosis of coronary artery disease in order to define vessel anatomy, isolate lesions and identify adjacent cardiac branches, which impinge on the lesion & affect ventricular function.

Diagnostic contact lenses are used to determine the best fit with eyes. This is aided with the use of corneal topography. These specially designed contacts can reshape the cornea because of several unique curvatures ground onto their back surface. These surfaces mold the tissue called the cornea. The lenses are made of a highly oxygen permeable material.

Diagnostic cystoscopy is intended for initial investigation of symptoms, particularly haematuria or recurrent urinary tract infections. It is usually carried out with local anaesthesia.

Diagnostic Dye is applied directly to the eye to assess tear duct function.