In 2022, a high frequency variability index (HFVI), which was renamed from ANI and uses the same algorithm as ANI, was commercialized; therefore, ANI/HFVI are currently in the spotlight. Unlike ANI, HFVI can be displayed along with other biometric information on the Root ® monitor.

2025年3月19日 · 田中等人提出，在进行肌间沟臂丛神经阻滞（ISB）时，外周神经阻滞（PNB）后高频变异性指数（HFVI）的增加，可能是由星状神经节阻滞介导的自主神经效应导致的。 为了研究这一问题，研究人员分析了接受 PNB 且进行 ISB 的患者（ISB 组，n=8）和接受 PNB 但未进行 ISB 的患者（非 ISB 组，n=22）。 结果显示，两组患者的 HFVI 均显著升高，且升高程度相似。 这些发现表明，ISB 对 HFVI 的直接自主神经影响极小。 此外，由于病例数量有限，无法评估 …

High Frequency Heartrate Variability Index Monitor. The MDoloris HFVi Monitor provides anesthesia providers with an easy, non-invasive analgesia nociception index monitoring system which offers an index on the amount of pain medicine needed to properly control pain during anesthesia and to arrive in PACU appropriately medicated.

2024年8月20日 · HFVI/ANI uses heart rate variability (HRV) measured via electrocardiogram (ECG) to assess parasympathetic tone, which is expressed in a nondimensional index from 0 (minimal parasympathetic tone) to 100 (maximal parasympathetic tone). HFVI/ANI can be obtained non-invasively by attaching a dedicated monitor to the chest.

After 23 years of research and development, MDoloris Inc has released a heart rate variability monitoring device. The HFVI technology (High frequencies variability index) can be used in any operation room for any type of surgery. It can also be used in the PACU, ICU, during opioid free anesthesia (OFA) and hypnosis.

The high-frequency variability index (HFVi) is an index of heart rate variability using the same algorithm as the analgesia nociception index and indicates sympathetic and parasympathetic tone.

2024年8月20日 · We investigated whether maximum postoperative pain at rest and postoperative morphine consumption are associated with HFVI/ANI just before extubation, mean HFVI/ANI during anesthesia, the difference in HFVI/ANI between before and 5 min after the start of surgery, and the difference in HFVI/ANI between before and 5 min after the nerve block.

In this review, we discuss the mechanisms by which numerous available nociception monitors assess pain along with the results of clinical and non-clinical HFVI studies to provide a comprehensive summary for clinicians interested in or considering the use of …

2025年2月1日 · High-frequency variability index (HFVi) and analgesia nociception index (ANi), which reflect autonomic tone and are calculated based on heart rate variability derived from the R-wave peak to R-wave peak (RR) interval in the electrocardiogram, have been gaining attention as tools for optimizing intraoperative opioid administration [1].

In 2022, a high frequency vari-ability index (HFVI), which was renamed from ANI and uses the same algorithm as ANI, was commercialized; therefore, ANI/HFVI are currently in the spotlight. Unlike ANI, HFVI can be displayed along with other biometric information on the Root® monitor.