2018年4月11日 · ☆ 看 fluid responsiveness 最重要的指標是 pulse pressure variation (PPV) 與 stroke volume variation (SSV)。 ☆ 一個呼吸週期,有胸內壓力的高低, 進而會去影響到心臟的容積多寡, 造成心搏輸出量的改變與脈壓的改變。 ☆ 在呼吸器使用,沒有自發性呼吸與規則心跳的三個前提下，一個呼吸週期影響脈壓 (pulse pressure) 或心搏輸出量 (stroke volume) 的百分比,變可以看出是否具有輸液反應性。 ☆ 若容積越低,在一個呼吸週期影響脈壓 (pulse pressure) 或心搏輸出 …

Stoke volume variation (SVV)的理論基礎是: 原本心臟在正常跳動時，即使是規則的心跳，每一次心跳所打出的stroke volume仍然有一點點差異，這個差異就稱為stroke volume variation。 使用呼吸器的病人，在吸氣期，呼吸器出力把氣體送進胸腔內，會造成胸內壓上升，

Measurements of SVV and stroke volume (SV) using USCOM and ICON were performed before and after fluid challenge. The tidal volume of individuals was measured and recorded. Results: Analysis was performed in 45 patients with median age of …

2018年12月11日 · During mechanical ventilation this phenomenon is reversed and is called reverse pulsus paradoxus, or paradoxical pulsus, or respiratory paradox. This variation can be measured and is called SVV. A cutoff value of >13% for SVV/PPV had a sensitivity of 94% and specificity of 96% to discriminate between fluid responders and nonresponders.

2018年8月4日 · svv/ppv (心搏變異量/脈壓變異量): 可以預測體液復甦的指標，但只能用在 全呼吸器控制 及 竇性節律 的病患，病患有自發性呼吸易造成SV/PV的變異性增加，心律過快 易干擾 SV/PV。

2022年2月16日 · There are no threshold levels available for static and dynamic SVV tests. For further assistance, please refer to the Instructions for Use and Additional Information manuals, which can be accessed from the question mark icon …

The stroke volume variation (SVV) or pulse pressure variation (PPV) give – provided there is a continuously ventilated patient with a stable heart rhythm – information as to whether an increase in preload will also lead to an increase in stroke volume.

Variations in stroke volume (SV) and pulse pressure (PP) occur as a result of interactions between the cardiovascular and respiratory systems. An alternative to SV optimisation is to minimise the variation in either SV or PP across the respiratory cycle.

2023年9月29日 · Stroke Volume Variation (SVV): SVV, similar to PPV, relies on arterial pressure waveforms. Record the maximum (SVmax) and minimum (SVmin) stroke volume values across a respiratory cycle. Calculate SVV using the formula: SVV (%) = [ (SVmax – SVmin) / ( (SVmax + SVmin) / 2)] x 100.

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