Greata e unul din simptomele cele mai intalnite in practica medicala.
Ca simptom, greata poate atesta nenumarate probleme ale aparatului digestiv si nu numai. Ne vom referi, in cele ce urmeaza, la cateva din cele mai frecvente.
Aproape orice persoana a resimtit-o, dintr-un motiv sau altul, in decursul vietii. Printre cauzele ei apar, mai frecvent, urmatoarele:
– miscarea, in cazul raului de masina sau de mare; este vorba de miscarile repetate in directii diferite dintr-un mijloc de transport;
– sarcina; aproximativ 50 la suta din femeile insarcinate resimt, dimineata, o stare de greata, in timpul primelor luni;
– boli virale gastrointestinale;
– boli ale sistemului nervos central, printre care migrenele, tumorile cerebrale sau meningitele;
– stari emotive; in acest caz, ea are loc din cauza secretiei crescute de suc gastric;
– mancarea alterata; atunci cand aceasta a fost depozitata in conditii improprii, un tip sau altul de bacterii se multiplica, de unde aparitia toxinelor in aparatul digestiv;
– alergii la anumite feluri de mancare;
– privelisti sau mirosuri neplacute;
– medicatie (antidepresive);
– stadiul postoperatoriu, in care greata este resimtita la iesirea de sub anestezie.
Greata poate fi declansata de impulsuri nervoase care isi au originea in urechea medie (legat de starea de echilibru), la nivelul creierului sau pe tractul gastrointestinal; ea ajunge intr-un centru nervos din creier, de unde poate declansa reflexul de voma.
De la caz la caz, starea descrisa se poate asocia cu un alt simptom: transpiratie intensa, scaun apos, dureri musculare, febra ridicata, dureri de cap, ameteala.
Doctorul va incerca sa determine cauza care a dus la simptom, pornind de la antecedentele fiecarui pacient, inclusiv raul de mare, de avion sau de masina. Impreuna cu simptomele aditionale, aceasta va ajuta la diagnosticarea bolii. De pilda, varsaturile repetate pot indica fie un ulcer peptic, fie o stare emotionala puternica, iar greata datorata unei intoxicatii apare la una pana la opt ore de la ingerarea alimentului respectiv. Se mai pot adauga, de regula, un examen complet al sangelui sau un test de sarcina.
Atunci cand cauza greturilor este o intoxicatie, raul produs de miscare sau o boala virala, durata simptomului este redusa, cel mai adesea sub 24 de ore.
Prevenire si tratament
Masurile profilactice si tratamentul depind de boala
In functie de cauza simptomului, unele din masurile de mai jos pot fi importante pentru prevenirea aparitiei greturilor:
– mese frugale si dese, atunci cand problema este legata de stomac;
– evitarea inclusiv a unor mirosuri placute, cum ar fi anumite parfumuri sau fumul de pipa;
– asezarea pe locul din fata al masinii, daca este vorba de rau de masina, sau la aripa avionului, daca acesta apare in aer.
In privinta tratamentului, se stie ca exista anumite medicamente care fac sa dispara greata. Acestea nu au, totusi, decat o eficienta redusa, daca nu este determinata si tratata ca atare boala care a provocat simptomul. Mai mult, in unele cazuri, ele pot fi daunatoare; de aceea, vor fi administrate numai sub prescriptie medicala.
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