Sizers, Cardiac Valve Prosthesis

Definition : Sizers designed to measure and calibrate the annulus diameter and positioning (e.g., valve seating) of cardiac valves to determine the appropriate size of the replacement valve prosthesis (either mechanical or biological) to be implanted during a surgical procedure. These instruments typically consist of a set of sterile, reusable, handheld, manual instruments with single or double working ends, usually with an integral calibrated cylinder or ring at one end to calibrate the annulus and a flanged end at the other extreme to calibrate the supra-annular placement and/or valve seating. Cardiac valve sizers are used in surgical procedures intended to replace stenotic or otherwise abnormal cardiac valves (e.g., atrial, mitral). Smaller sizers for use in minimally invasive surgery (typically for annuloplasty procedures) with a thickness of about 2 to 3 mm (0.1 inch) and that include a sizing portion for measuring the valve annulus and a coupling portion for attaching to a handle are also available.

Entry Terms : "Cardiac Valve Prosthesis Sizers" , "Surgical Valve Sizing Instruments"

UMDC code : 17703

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