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Ostre uszkodzenie nerek – patogeneza i możliwości wczesnej dia... - Vetkompleksowo – serwis dla lekarzy weterynarii
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Wyszukaj w serwisie


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Ostre uszkodzenie nerek – patogeneza i możliwości wczesnej diagnostyki


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Ostre uszkodzenie nerek (ang. acute kidney injury, AKI)

Stanowi ono zespół zaburzeń związanych z nagłym uszkodzeniem miąższu tego narządu i upośledzeniem jego czynności. Proces ten najczęściej spowodowany jest gwałtownym niedokrwieniem, zatruciem lub czynnikami zakaźnymi (2). Do niedawna, w celu opisania tych zaburzeń, używano określenia ostra niewydolność nerek – ARF (ang. acute renal failure), ale obecnie, ze względu na pojawianie się w przebiegu tego zaburzenia uszkodzeń miąższu nerek, wprowadzono bardziej pojemne pojęcie – ostre uszkodzenie nerek. W praktyce klinicznej często (choć nieprawidłowo) pojęcia AKI i ARF są stosowane wymiennie.

Czynniki ryzyka AKI

W patogenezie AKI najbardziej istotne jest ostre niedokrwienie, ponieważ nerki, a zwłaszcza kora i zewnętrzna część rdzenia, otrzymują około 20% pojemności minutowej serca, czyli w stosunku do swojej masy najwięcej ze wszystkich narządów (2). Hipowolemia nie tylko zmniejsza perfuzję nerkową, ale także zmniejsza objętość dystrybucji leków nefrotoksycznych, co powoduje zmniejszenie przepływu kanalikowego i zwiększenie reabsorpcji kanalikowej tych leków (2). Do czynników zwiększających ryzyko wystąpienia AKI należą również:

  • odwodnienie – badania przeprowadzone u ludzi wskazują, że zmniejszenie objętości krążącego płynu zwiększa ryzyko pojawienia się AKI nawet 10-krotnie (2),
  • istniejąca wcześniej choroba nerek,
  • zaawansowany wiek – ze względu na zmianę farmakokinetyki leków potencjalnie nefrotoksycznych (inhibitory ACE, diuretyki, NPLZ) i zmniejszenie zdolności do kompensacji wpływu czynników [...]
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Mogą zainteresować Cię również


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Wizytówka firmy


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Sklep


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