弁置換、弁置換術

WordNet

control consisting of a mechanical device for controlling the flow of a fluid
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
one of the paired hinged shells of certain molluscs and of brachiopods
the entire one-piece shell of a snail and certain other molluscs
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
the act of furnishing an equivalent person or thing in the place of another; "replacing the star will not be easy" (同)replacing
(of brass instruments) having valves

PrepTutorEJDIC

(液体・ガスなどの流れを調節する)『バルブ』,弁 / (血液の流れを調節する)弁,弁膜 / (管楽器の)バルブ / (2枚貝の)から,貝がら / 《英》真空管
置き換わること,取り替えること,元へ戻すこと;返済・置き換わる物(人),代理;補充員補充物

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/12/15 20:59:11」(JST)

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Valve replacement surgery is the replacement of one or more of the heart valves with either an artificial heart valve or a bioprosthesis (homograft from human tissue or xenograft e.g. from pig). It is an alternative to valve repair.

There are four procedures

Aortic valve replacement
Mitral valve replacement
Tricuspid valve replacement
Pulmonary valve replacement

Current aortic valve replacement approaches include closed heart surgery, Very invasive cardiac surgery (VICS) and Very invasive, Scapulae-based aortic valve replacement.

Catheter replacement of the aortic valve (called trans-aortic valve replacement or implementation [TAVR or TAVI]) is a minimally invasive option for those suffering from aortic valve stenosis. TAVR is commonly performed by guiding a catheter from the groin to the narrowed valve via the aorta using realtime x-ray technology. A metal stent containing a valve is then deployed using a balloon to press the stent into the valve in effect opening the stenosed (or narrowed) valve and lodging the stent in place. The procedure was first approved in the United States in November 2011 ^[1] as an alternative for people deemed a poor candidate for open approach replacement; however, TAVR has been successfully implemented into practice in other countries prior to 2011.^[1]

Medical uses

In those between 50 and 70 years of age bioprosthetic and mechanical aortic valves have similar overall outcomes with respect to stroke and survival.^[2]

References

^ ^a ^b "FDA-approved transcatheter approach offers life-extending valve replacement for inoperable patients". Stanford School of Medicine. Retrieved 19 July 2013.
^ Chiang, Yuting P.; Chikwe, Joanna; Moskowitz, Alan J.; Itagaki, Shinobu; Adams, David H.; Egorova, Natalia N. (1 October 2014). "Survival and Long-term Outcomes Following Bioprosthetic vs Mechanical Aortic Valve Replacement in Patients Aged 50 to 69 Years". JAMA 312 (13): 1323. doi:10.1001/jama.2014.12679.

External links

ValveReplacement.org An online support forum.

UpToDate Contents

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1. 経カテーテル的大動脈弁置換術 transcatheter aortic valve replacement
2. 人工心臓弁のある患者における抗血栓療法 antithrombotic therapy in patients with prosthetic heart valves
3. 成人における大動脈弁狭窄症の外科的弁置換術 surgical valve replacement in aortic stenosis in adults
4. 人工心臓弁のある患者のマネージメント management of patients with prosthetic heart valves
5. 成人の大動脈弁狭窄症における弁置換術の適応 indications for valve replacement in aortic stenosis in adults

English Journal

High thoracic epidural analgesia decreases stress hyperglycemia and insulin need in cardiac surgery patients.

Greisen J, Nielsen DV, Sloth E, Jakobsen CJ.SourceDepartment of Anaesthesiology & Intensive Care, Aarhus University Hospital, Aarhus, Denmark.
Acta anaesthesiologica Scandinavica.Acta Anaesthesiol Scand.2013 Feb;57(2):171-7. doi: 10.1111/j.1399-6576.2012.02731.x. Epub 2012 Jul 4.
OBJECTIVE: Assuming that high thoracic epidural analgesia (HTEA) with the sympathetic block might decrease postoperative blood glucose (BG) level and reduce the need of insulin, the aim was to evaluate the effect of HTEA on the BG level and insulin requirement in patients undergoing cardiac surgery.
PMID 22762307

Pregnancy outcomes in women with aortic valve substitutes.

Heuvelman HJ, Arabkhani B, Cornette JM, Pieper PG, Bogers AJ, Takkenberg JJ, Roos-Hesselink JW.SourceDepartment of Cardio-Thoracic Surgery, Erasmus University Medical Center, Rotterdam, The Netherlands. Electronic address: h.heuvelman@erasmusmc.nl.
The American journal of cardiology.Am J Cardiol.2013 Feb 1;111(3):382-7. doi: 10.1016/j.amjcard.2012.09.035. Epub 2012 Nov 20.
Young women who require aortic valve replacement need information on the potential cardiac and obstetric complications of pregnancy for the different valve substitutes available. We, therefore, assessed the pregnancy outcomes in women who had received an autograft, homograft, or mechanical valve in
PMID 23174182

Indexes of von Willebrand Factor as Biomarkers of Aortic Stenosis Severity (from the Biomarkers of Aortic Stenosis Severity [BASS] Study).

Blackshear JL, Wysokinska EM, Safford RE, Thomas CS, Stark ME, Shapiro BP, Ung S, Johns GS, Chen D.SourceDivision of Cardiovascular Diseases, Mayo Clinic Florida, Jacksonville, Florida. Electronic address: blackshear.joseph@mayo.edu.
The American journal of cardiology.Am J Cardiol.2013 Feb 1;111(3):374-81. doi: 10.1016/j.amjcard.2012.10.015. Epub 2012 Nov 17.
We correlated von Willebrand factor (VWF) activity indexes and brain natriuretic peptide (BNP) with measures of aortic stenosis (AS) severity, bleeding, symptoms, and freedom from death or aortic valve replacement. Patients with AS (n = 66 [16 mild, 20 moderate, and 30 severe]) and aortic valve rep
PMID 23168287