Uvavanyo oluqhelekileyo olungatholakali eUnited States
Kukho uvavanyo olungaphezu kweyodwa olungasetyenziselwa ukuvavanya indlela i-thyroid yakho isebenza ngayo.
Ngaphandle kokuvavanya i-hormone ekhuthaza i-thyroid (TSH) okanye i-thyroxine level (T4), ugqirha unokusebenzisa i-hormone-release ye-hormone (TRH) yovavanyo lokuvuselela. Oko kwathiwa, lo vavanyo alunasisetyenziswa kakhulu; Enyanisweni, ayifumaneki eUnited States, nangona ikhona kwamanye amazwe.
Ukuqonda uvavanyo lwe-TRH
Ukuqonda indlela uvavanyo lwe-TRH lokuvuselela ngayo ukusebenza, okokuqala kukunceda ukuphonononga ngokukhawuleza indlela ama-hormone ahlukahlukeneyo asebenzisana ngayo ne-thyroid:
- I-hypothalamus yakho yintsipho engqondweni yakho efihla i-thyrotropin-ukukhupha i-hormone (TRH).
- Xa i-TRH ikhishwa, ivuselela ingqondo yengqondo yakho ukukhupha i-thyroid yokuvuselela i-hormone (TSH).
- I-TSH igqugquzela i-thyroid ngokwayo ukwenza i-hormone ye-thyroid.
Uninzi oogqirha basebenzisa uvavanyo lwe-TSH, olulinganisa umgangatho weTSH ojikelezayo ngegazi ngexesha elinye. Iziphumo zovavanyo lwe-TSH zitsholwa ; ukuba amanqanaba akho aphezulu okanye aphantsi kunoluhlu lwesalathiso, oku kubonwa njengobungqina bentsholongwane ye-thyroid.
Uvavanyo lwe-TRH luhluke. Okokuqala, uvavanyo lwesiseko lwe-TSH lwenziwe. Emva koko unikezwa umthamo we-TRH ngokusebenzisa umvini wakho okhuthaza i-pituitary yakho ukukhulula i-TSH. Isampula yegazi yesibini ilandelwa emva kwemizuzu engama-20 ukuya kwimizuzu engama-60, kwaye ireyithi ye-TSH iphinda iphindwe.
Abanye oogqirha banomuvo wokuthi uvavanyo lwe-TRH luyakwazi ukubona iingxaki ze-thyroid ezifihlakeleyo kwaye ulinganise ukukwazi kwakho ukuphendula ngexesha langempela, xa kuthelekiswa novavanyo lwe-TSH, oluyi-snapshot yomsebenzi we -roid ngexesha elinye.
Indlela uvavanyo lweTrH eyahlula ngayo kwi-TSH Test
Ukuthelekisa uvavanyo lwe-TRH kunye nokuhlolwa kwe-TSH kufana nokuhlolwa koxinzelelo lwengqondo xa kuqhathaniswa ne-electrocardiogram, okanye uvavanyo lwe-glucose ukunyamezela xa kuthelekiswa nokuzila ukudla kwe-glucose level.
Kwi-test stimulation, umceli-mngeni ungabonakalisa ukungonakali kwi-thyroid.
Sekunjalo, uninzi oogqirha bajonga ukuba uvavanyo lwe-TSH luchanile ngokuchanekileyo kunye negalelo elilodwa legazi elifunekayo kwaye akukho nto ekhethekileyo. Ngaphezu koko, i-TSH ayithengi. Xa kuthelekiswa, uvavanyo olunzulu lwezakhono zabasebenzi kunye nolona lubiza i-TRH ludinga idilesi ehlukeneyo idibanisa ihafu yehora ngaphandle, ukufumaneka kwe-TRH, nokwazi indlela yokwenza ngokuchanekileyo uvavanyo.
Iinzuzo ze-TRH Test
Uvavanyo lwe-TRH lusetyenziselwa ngamanye amaxesha ukunceda ukuchonga i-hypothyroidism yesibini (hypothyroidism ezibangelwa iingxaki ze-pituitary) kunye ne-tertiary hypothyroidism (i-hypothyroidism ngenxa yeengxaki ze-hypothalamic disorder).
Nangona kunjalo, ngelixa i-TRH ingasetyenziselwa ukufumanisa i-hypothyroidism yesibini okanye ephakemeyo (ebizwa ngokuba yi-central hypothyroidism), ayinakukwazi ukuhlula phakathi kwe-pituitary versus hypothalamic disease.
Isiphelo
Ekugqibeleni, abaphandi baye babonisa ukuba uvavanyo lwe-TRH lokushukumiseleka lungasetyenziselwa ukubona i-hypothyroidism ephakathi kwizifo ezingahambelani ne-thyroid.
Uphando olwangaphambili lubonisa ukuba uvavanyo lwe-TRH luyakubonisa oko kuthethwa ngabo njengendlela yokuqala ye-biochemical hypothyroidism ngaphambi kokuba kuboniswe kwi-TSH.
Mhlawumbi, kuya kuqhutyelwa uphando olutsha ukufumana iingeniso ezinokuthi izigulane zisebenzise ngokubanzi olu vavanyo.
> Imithombo:
> Doi SAR, Issac D, Abalkhail S, Al-Qudhaiby MM, Hafez MF, Al-Shoumer KAS. I-TRH Ukuqulunqa Xa i-Tsh Basal iphakathi kwendawo eqhelekileyo: Ngaba kukho "i-Sub-Biochemical" Hypothyroidism? Uphando lweMpilo noPhando . 2007; 5 (3): 145-148. i-doi: 10.3121 / cmr.2007.756.
> Ross DS. (2017). Central centothyroidism. Cooper DS, ed. Isemgangathweno. Waltham, MA: UpToDate Inc.