
jorke-shaili valve

oru mechanical krithrima hridaya vaalvaan bijork-shaili valve. american enchineeyar donald sheely sweedish hart sarjan wiking bijork chernnaanu valve kandupidichathu.
1971 muthal iortic vaalvukalum mitral vaalvukalum maattisthaapikkaan ithu upayogikkunnu. vijayakaramaya aadyathe charivu disk vaalvayirunnu ithu. aadyam shiily laborattarikalum pinneedu pinneedu faizar chernnaanu ithu nirmmichathu, aaa kambani shiily vaangi. bork-shaili vaalvinte oru model thakaraarilaanennu kandethiyathinethudarnn oru prashasthamaaya vyavaharathinum thirichuvilikkunnathinum vishayamaayi.
nirmmaanam.
oru loha bhavanathil orotta kaarban pooshiya disk adangiyathaanu bijork-shaili valve. oru inflo, oru outflo strutt enningane rund loha strattukal disk pidichu nilkkunnu. 51 sathamaanam cobalt, 20 sathamaanam chromium, 15 sathamaanam tangsttan, 10 sathamaanam nikkal enniva chernna 25 ennakkinar kalarnna haynukal upayogichaanu veedu nirmmichirikkunnathu. jorke-shaili valve valare modiyullathaayi kanakkakkappedukayum 1970kalil vyaapakamaayi upayogikkukayum cheythu. ennirunnaalum, ithu deerghakaala dharikkunna prashnangalkk vidheyamaakumennum microscopic loha sakalangal choriyumennum pilkkala gaveshanangal soochippichu.
convexo-konkevu valve vaikalyangal.
ennirunnaalum, vaalvinte roopakalppanayum vegathayulla nirmmanavum mechappeduthaanulla sramangal durbalamaaya gadanayilekku nayichu, gurutharamaaya prathyaaghaathangal undaakki. 1979 muthal, convexo-konkevu roopakalppanayulla jorke-shaili vaalvukalkk puranthallal struttle odivukal undakanulla pravanatha undaayirunnu, ithu vinashakaramaaya valve paraajayathinum pettennulla hridayasambandhamaaya maranathinum kaaranamakum. loha valve valayathil weld cheytha sthalathu strutt pottunnathayi pinneedu nadatthiya vishakalanathil kandethi. strattinte oru attam aadyam pottukayum thudarnnu kurachu maasangalkk sesham randaamathe strutt pottukayum cheyyum. oduvil, 80,000 convexo-konkevu vaalvukalil 619 ennam eee reethiyil pottukayum moonnil rund kesukalil rogi marikkukayum cheythu. 1986ll eph. dii. eiii. convexo-konkevu vaalvinte amgeekaaram pinvalichu. nirddishta veldarukal weld cheytha vaalvukalkk pottanulla saadhyatha kooduthalaayirunnu.
convexo-konkevu valve vipaniyil ninnu pinvalikkukayum onniladhikam kesukal phayal cheyyukayum cheythu.
1992-ll, faizar (sheeliyude maathru kambaniyaaya) thakaraarulla vaalvukalulla rogikalum oru othutheerppinu sammathichu, faisar 80 dasalaksham muthal 130 dasalaksham dollar vare nashtaparihaaramaayi nirddeshikkukayum pottalundakaanulla saadhyatha kooduthalulla hridaya vaalvukalude sweekarthaakkale thirichariyunnathinaayi gaveshanathinaayi 75 dasalaksham dollar neekkivaykkukayum cheythu. aathyanthika othutheerppu motham 215 dasalaksham dolaraayirunnu. karaarinte oru prathyeka bhaagath valve odivukal undaayal rogico athijeevichavarkko 300 dasalaksham dollar vare nalkendathundu.
eee vaalvukalellaam neekkam cheyth maattisthaapichittil. valve odivukalkkulla saadhyatha, valve maattisthaapikkunnathinu shasthrakriyayude apakadasaadhyathaykkethire santhulithamaakkiyittundu. valve "reekal" nuu chuttumulla vyavahara velayil theerumaana upakaranangal prasidheekarikkukayum ithinaayi sajjeekaricha oru trasttil ninnu labhyamavukayum cheythittundu. valve maattisthaapikkaanulla sasthrakriya moolyavathaano ennathinekkurichu shupaarsha cheyyaan upakaranangal rogiyude praayam, vaalvinte valupavum sthaanavum (iortic allengil mitral) mattu gadakangalum kanakkiledukkunnu. chila rogikalil valve maattisthaapikkunnathinu shasthrakriyaykkulla saadhyatha valve pottanulla saadhyathayekkaal kooduthalaanu. rogikk nashtapariharam nalkunnathinum valve maattisthaapikkunnathinu hridaya shasthrakriyayude chelavukal vahikkunnathinum oru fund sthaapichu.
jorke-shaili vaalvinte ettavum puthiya modalukal convexo-konkevu design illaathaakkukayum pakaram vaykkenda aavashyamillaatha vishwasaneeyamaaya vaalvukalumaan.