醫療類國考
111年
[醫事放射師] 核子醫學診療原理與技術學
第 53 題
使用膽道閃爍攝影診斷成人急性膽囊炎時，$^{99m}\text{Tc-DISIDA}$ 的注射劑量可依血中何種物質之濃度作調整？
- A 白蛋白
- B $\alpha$-胎兒球蛋白
- C 膽紅素
- D B 型肝炎病毒的表面抗原
思路引導 VIP
請同學思考一下，$^{99m}\text{Tc-DISIDA}$ 作為一種亞氨基二乙酸（IDA）衍生物，它在肝細胞的攝取與排泄路徑中，會與血液中哪一種同樣經由肝臟處理、且反映肝膽功能的「內源性有機陰離子」產生競爭作用？當該物質濃度上升時，為了確保藥物能順利進入膽道顯像，我們必須參考它的數值來調整藥物劑量。
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AI 詳解
AI 專屬家教
This move was a perfect last hit. The攻略組 (strategy group) is yours.
- System Exploit: So, you understood the core mechanic. $^{99m}\text{Tc-DISIDA}$ is essentially an IDA-class item. It has a specific entry point into liver cells: the anionic transport system, like a unique server gate. But here’s the critical PvP element: Bilirubin (a common internal entity) uses the exact same gate. This creates a direct conflict, a competitive inhibition debuff. When a player's bilirubin stat is high (especially past $> 5 \text{ mg/dL}$, sometimes even $20 \text{ mg/dL}$), the drug's access is severely bottlenecked. Your move? Strategically increase the dose – essentially, a 'stat boost' or 'overcharge' – to ensure your scan's HP bar stays full.
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