La possibilità di sviluppare il diabete di tipo 2 cresce con l’età e aumenta vertiginosamente dopo i 60 anni: non a caso questa forma viene definita “diabete dell’anziano”.
Le persone con questa forma di diabete non soffrono di mancanza di insulina ma di un fenomeno chiamato insulino-resistenza, che consiste nell’incapacità da parte delle cellule dell’organismo di utilizzare questo ormone, a causa della riduzione del numero dei recettori per l’insulina.
A causa di questa incapacità di utilizzare l’insulina, il glucosio, che non riesce a penetrare nelle cellule, si accumula gradualmente nel sangue provocando contemporaneamente alti valori di glucosio (iperglicemia) e di insulina (iperinsulinemia), il che non accade nei soggetti non diabetici.
Un notevole stress per l’organismo che matura più facilmente complicanze.
Le più frequenti sono:
In età avanzata, molti presentano alterazioni di natura arteriosclerotica, quando cioè le arterie si irrigidiscono e presentano grasso nella parete. L’innalzamento del livello di glucosio contribuisce ad aggravarle, perché altera il bilanciamento di componenti del sangue, come il colesterolo. Molti sono i farmaci e gli interventi efficaci per contrastare questo tipo di problemi.
Alti livelli di glucosio cambiano la forma del cristallino influenzando negativamente la messa a fuoco (cataratta). La soluzione è un facile intervento chirurgico di sostituzione del cristallino.
Dopo anni di diabete, inoltre, è possibile che si verifichino danni ai vasi sanguigni che irrorano la retina (retinopatia), soprattutto se non sono stati effettuati regolari e frequenti controlli alla vista.
I reni sono un organo molto debole nelle persone con diabete. La complicanza è rilevabile con l’analisi delle urine: se c’è traccia di albumina (una proteina) significa che è in corso un’infezione o si sono danneggiati i vasi sanguigni. Contemporaneamente si alzerà anche la pressione arteriosa.
In casi estremi, si va incontro a dialisi o trapianto renale.
L’irrigidimento delle arterie provocato dal diabete porta a uno scarso afflusso del sangue alle estremità, piedi in primis, aumentando la predisposizione a infezioni e neuropatie.
Danni ai vasi sanguigni e/o alle terminazioni nervose del pene provocano impotenza. Non è raro che tale disturbo venga trascurato – per la vergogna che implicano i problemi di natura sessuale negli uomini – e peggiori con il passare degli anni.
La persona anziana con diabete trae notevole beneficio dall’attività fisica regolare unita a un’alimentazione sana ed equilibrata. Poiché spesso si è restii a modificare le proprie abitudini, è bene farsi aiutare da Specialisti in Diabetologia e malattie del Metabolismo.
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