護理師評估病人的脫水狀態。下列哪項發現是嚴重體液缺乏的最可靠指標？
A nurse is assessing a client for dehydration. Which finding is the most reliable indicator of severe fluid deficit?
- ADry skin皮膚乾燥
- BDizziness頭暈
- CSudden weight loss✓ 正解體重驟降
- DIncreased thirst口渴增加
在評估體液流失（Dehydration）時，體重變化（Sudden weight loss）是臨床上最客觀且精確的指標。因為體液的快速流失會直接反映在體重計上，1 公斤的體重減輕約等於 1 公升的水分流失。其他症狀（如口渴、頭暈、乾燥）受環境、個體主觀感受及其他共病症影響，特異性較低，不如體重變化可靠。
In assessing fluid loss (dehydration), body weight change (sudden weight loss) is clinically the most objective and accurate indicator. Because the rapid loss of body fluid is directly reflected on the scale, a 1 kg reduction in body weight corresponds to approximately 1 liter of fluid loss. Other manifestations (such as thirst, dizziness, and dryness) are influenced by environment, individual subjective perception, and other comorbidities; their specificity is low and they are not as reliable as weight change.