Izinto ezihlanzekile zezokwelapha ziyizinto ezikhethekile zokusebenza ezisetshenziswa ezinkambisweni zezokwelapha kanye nokuxhumana okuqondile noma okungaqondile nezicubu zomuntu. Ngakho-ke, ngezinto zokuhlanzeka kwezokwelapha ze-polymer, ikakhulukazi izinto ezisetshenziswayo ze-polymer yezokwelapha, kufanele zihlangabezane nezakhiwo zokungewona ubuthi, ukunganaki kwamakhemikhali, ukuhambelana kwe-histocompatibility, ukuhambisana kwegazi, ukumelana nokuguga kwebhayoloji, ukubola, ukungenwa kwe-carcinogenicity, kanye nokucutshungulwa kalula, ukuze kuqinisekiswe ukuphepha kwezinto ezisetshenziswayo zomzimba womuntu.
Izinto ze-PA zinesakhiwo esifanayo se-amide esinengxenye yemvelo yomuntu yamaprotheni ama-macromolecules, sinokuvumelana okuhle kwe-biocompatibility, futhi akulula ukwenza amangqamuzana ezinto eziphilayo akhiqize amasiginali ashukumisayo.
Ngaphezu kwalokho, inokuqina okuhle kwamakhemikhali kanye nezakhiwo zemishini ezilawulekayo, njll. Ngesikhathi esifanayo, amaseli angakhangiswa ebusweni bezinto ze-PA. Zonke lezi zakhiwo ezikhethekile zenza izinto ze-PA zezokwelapha nezokunakekelwa kwempilo, ikakhulukazi izinto ze-PA ezitshaliwe, zibambe iqhaza elihle ekwehliseni ubuningi, ekuguquleni izakhiwo zemishini, futhi ikakhulukazi ekusizeni ukusungulwa kwemiphumela ehambisanayo yemishini phakathi kwezinto ze-PA ezifakiwe kanye nomzimba womuntu.
Ngenxa yamandla ayo emishini emihle kakhulu, ukuhuzuka okuphezulu kanye nokumelana nokugqwala, kanye nokuhambisana okuhle kwe-biocompatibility, i-PA isetshenziswa kabanzi njenge-catheter yezokwelapha nezinye izinto zokunakekelwa kwempilo. Ama-catheter ezokwelapha angamashubhu athambile, angenalutho afakwa emzimbeni ukuze asize ekuphumeni komchamo noma asetshenziswe njengeziqondiso zocingo zezinhlelo zokusebenza ezihlukahlukene ekuxilongeni nasekwelapheni isifo senhliziyo kanye nokuphazamiseka kwesisu.Ama-catheter ezokwelapha e-PA nawo asetshenziswa ekuconseni ngemithambo futhi angalungiselelwa ikakhulukazi kusuka ku-PA6, PA66, PA11 kanye ne-PA12.
Ngokusekelwe esicini sezinto ze-PA, kanye nezidingo zezokwelapha nezokuhlanzeka,I-BAOD Extrusionwethule ezifaneleimiklamo ye-extrusionngemva kokuhlolwa nokucwaninga okuqhubekayo. Ngokucabangela ngokugcwele ukunemba kwama-catheter ezokwelapha kanye nezidingo zokukhiqizwa kwesivinini esikhulu, kunciphisa kakhulu izinga lokumosha izinto ezibonakalayo kanye nezinga lemikhiqizo enesici. Ngomshini oshintshashintshayo we-othomathikhi kanye nokusika nokuqoqwa okuzenzakalelayo, njll., yonga izindleko zabasebenzi futhi yenza inzuzo yebhizinisi ibe nkulu.
Isikhathi sokuthumela: Jun-13-2024