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  • Pumps designed to inflate balloons attached to the distal tips of catheters with fluids (e.g., saline); the pumps can also measure the pressure of the fluid. These pumps are usually single-use devices that include a relatively small syringe (e.g., 20 ml); a manual knob used to turn a screw-driven mechanism that advances the plunger of the syringe at a predetermined rate; controls to select the volume and flow rate of the fluid to be infused; an extension tube to be placed between the pump and the catheter; and a manometer with an appropriate scale (e.g., up to 30 atmosphere of pressure [441psi or 3040 kPa]). Manometric catheter balloon inflation pumps are used during catheterization procedures, frequently through an endoscope and they require an accurate measurement of the pressure during fluid delivery. Also available are dedicated manometric pumps intended for percutaneous transluminal coronary angioplasty balloon catheters and for catheter balloons used for the dilatation of the Eustachian tube through a special micro nasoscope.
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