Imagnetic resonance angiography

I-Magnetic resonance angiography (MRA) luvavanyo lweMRI lwemithambo yegazi. Ngokungafaniyo ne-angiography yesiko ebandakanya ukubeka ityhubhu (i-catheter) emzimbeni, i-MRA ayisebenzi.

Unokucelwa ukuba unxibe ilokhwe yasesibhedlele. Unakho ukunxiba iimpahla ngaphandle kokuqiniswa kwesinyithi (ezinje ngezikipa kunye nesikipa). Iindidi ezithile zentsimbi zinokubangela imifanekiso engacacanga.

Uya kulala kwitafile emxinwa, ethi ityibilike kwiskena esikhulu esimile.

Ezinye iimviwo zifuna idayi ekhethekileyo (umahluko). Rhoqo, idayi inikwa ngaphambi kovavanyo ngomthambo (IV) esandleni okanye kwingalo yakho. Idayi inceda i-radiologist ibone iindawo ezithile ngokucacileyo.

Ngexesha le-MRI, umntu osebenza kumatshini uya kukujonga ukwelinye igumbi. Uvavanyo olo lungathatha iyure enye okanye ngaphezulu.

Unokucelwa ukuba ungatyi okanye usele nantoni na iiyure ezi-4 ukuya kwezi-6 ngaphambi kokuskena.

Xelela umboneleli wakho wezempilo ukuba woyika iindawo ezikufutshane (une-claustrophobia). Unokunikwa iyeza lokukunceda uzive usozela kwaye ungakhathazeki kangako. Umboneleli wakho unokucebisa iMRI "evulekileyo". Kwi-MRI evulekileyo, umatshini awukufuphi emzimbeni.

Ngaphambi kovavanyo, xelela umboneleli wakho ukuba unayo:

• Iiklip ze-aneurysm zengqondo
• Ivalvu yentliziyo eyenziweyo
• Intliziyo defibrillator okanye ipacemaker
• Ukufakwa kwendlebe ngaphakathi (cochlear)
• I-insulin okanye izibuko lechemotherapy
• Isixhobo sangaphakathi (IUD)
• Isifo sezintso okanye i-dialysis (ngekhe ukwazi ukufumana umahluko)
• Umncedisi weNeurostimulator
• Kutshanje kubekwe amalungu anganyanisekanga
• Ukuqina kwemithambo
• Ukusebenza ngesinyithi kwiphepha elidlulileyo (unokufuna iimvavanyo ukujonga iziqwenga zentsimbi emehlweni akho)

Ngenxa yokuba i-MRI iqulethe iimagnethi ezinamandla, izinto zesinyithi azivumelekanga kwigumbi elinesikena se-MRI. Gwema ukuphatha izinto ezinje:

• Iipokotho, iipeni, kunye neiglasi zamehlo
• Iwotshi, amakhadi etyala, ubucwebe kunye nezinto zokuva
• Iinwele, iiziphu zentsimbi, izikhonkwane, kunye nezinto ezifanayo
• Ukufakwa kwamazinyo okususwayo

Uvavanyo lwe-MRA alubangeli zintlungu. Ukuba uneengxaki zokulala ungazolanga okanye unovalo kakhulu, unganikwa iyeza (lokuthomalalisa) ukuze uphumle Ukuhamba kakhulu kunokufaka imifanekiso kwaye kubangele iimpazamo.

Itafile inokuba nzima okanye ibanda, kodwa ungacela ingubo okanye umqamelo. Umatshini uvelisa ingxolo enkulu kunye nengxolo xa kuvuliwe. Unganxiba iiplagi zendlebe ukunceda ukunciphisa ingxolo.

I-intercom egumbini ikuvumela ukuba uthethe nomntu nangaliphi na ixesha. Ezinye iiskena zinee-TV kunye nee-headphone ezikhethekileyo onokuzisebenzisa ukunceda ixesha lidlule.

Akukho xesha lokufumana kwakhona, ngaphandle kokuba unikwe iyeza lokuphumla.

I-MRA isetyenziselwa ukujonga imithambo yegazi kuwo onke amalungu omzimba. Uvavanyo lunokwenziwa kwintloko, intliziyo, isisu, imiphunga, izintso kunye nemilenze.

Ingasetyenziselwa ukuxilonga okanye ukuvavanya iimeko ezinje:

• I-arterial aneurysm (ukwandiswa okungaqhelekanga okanye ibhaluni yenxalenye yomthambo ngenxa yobuthathaka eludongeni lomthambo wegazi)
• Ukudibana kweAortic
• Ukuqhekeka kwe-aortic
• Ukubetha
• Isifo semithambo yeCarotid
• I-atherosclerosis yeengalo okanye yemilenze
• Isifo sentliziyo, kubandakanya nesifo sentliziyo
• Umthambo weMesenteric ischemia
• I-renal artery stenosis (ukunciphisa imithambo yegazi kwizintso)

Iziphumo eziqhelekileyo zithetha ukuba imithambo yegazi ayibonisi miqondiso yokunciphisa okanye yokuvaleka.

Iziphumo ezingaqhelekanga zibonisa ingxaki kulunye okanye ngaphezulu kwemithambo yegazi. Oku kunokucebisa:

• I-atherosclerosis
• Umonzakalo
• Isifo sokuzalwa
• Enye imeko yemithambo

I-MRA ikhuselekile ngokubanzi. Isebenzisa akukho radiation. Ukuza kuthi ga ngoku, akukho ziphumo bezingalindelekanga ezivela kumazibuthe kunye namaza erediyo axeliweyo.

Uhlobo oluqhelekileyo lokuchasana olusetyenzisiweyo luqukethe i-gadolinium. Kukhuselekile kakhulu. Ukuphendula ngokuchaseneyo nento leyo kunqabile ukwenzeka. Nangona kunjalo, i-gadolinium inokuba yingozi kubantu abaneengxaki zezintso abafuna i-dialysis. Ukuba unengxaki yezintso, nceda uxelele umboneleli wakho phambi kovavanyo.

Iimpawu zemagneti ezomeleleyo ezenziwe ngexesha le-MRI zinokubangela ukuba iintliziyo zihambe kunye nezinye izinto zokufakelwa ukuba zingasebenzi ngokunjalo. Banokubangela ukuba iqhekeza lesinyithi ngaphakathi emzimbeni wakho lihambe okanye litshintshe.

MRA; I-Angiography-ukuvakala kwemagneti

• Ukuskena iMRI

Umchweli uJP, uLitt H, uGowda M. Imagnetic resonance imaging kunye ne-arteriography. Ku: Sidawy AN, Perler BA, ii-eds. Utshintsho lukaRutherford lweeVascular and Therapy ze-Endovascular Therapy. Umhla we-9. IPhiladelphia, PA: Elsevier; I-2019: isahluko 28.

Kwong RY. Imifanekiso ye-Cardioovascular imaging resonance. Ku: Zipes DP, Libby P, Bonow RO, Mann DL, Tomaselli GF, Braunwald E, ii-eds. Isifo sentliziyo seBraunwald: Incwadi yesifundo seMpilo yeNtliziyo. Ngomhla we-11. IPhiladelphia, PA: Elsevier; I-2019: isahluko 17.