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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
Published on: November 6, 2015
Patient-prosthesis mismatch: the Japanese experience
1Department of Cardiovascular Surgery, Jikei University, Tokyo, Japan.
Summary
Patient-prosthesis mismatch (PPM) occurs when an artificial heart valve is too small for the patient. Strategies like aortic root enlargement and advanced prostheses can minimize PPM risk during aortic valve replacement.
Area of Science:
- Cardiovascular Surgery
- Prosthetic Heart Valves
- Biomaterials in Medicine
Background:
- Patient-prosthesis mismatch (PPM) is defined by prosthetic valve size relative to patient anatomy.
- Current PPM definition uses corrected effective orifice area (EOA)
- Surgical approach for aortic valve replacement (AVR) varies based on patient factors and annulus size.
Purpose of the Study:
- To review surgical strategies for minimizing PPM risk in AVR.
- To evaluate the impact of new high-performance prostheses on EOA.
- To discuss evolving surgical approaches for PPM prevention.
Main Methods:
- Retrospective review of AVR cases from 1991-2002.
- Analysis of surgical techniques including aortic root enlargement and supra-annular prosthesis implantation.
- Comparison of outcomes with traditional versus new high-performance prostheses.
Main Results:
- Aortic root enlargement was routine for patients >65 years old.
- Supra-annular bioprosthesis implantation was used for patients >=65 with small annuli.
- Newer prostheses offer dramatically increased effective orifice areas (EOAs).
Conclusions:
- Minimizing PPM risk is crucial in AVR and requires tailored surgical strategies.
- Advanced prostheses and techniques like aortic root enlargement improve valve sizing.
- Evolving prosthesis technology significantly impacts PPM management and patient outcomes.
