Key result
Auricular acupuncture significantly reduced the coupling strength from arterial blood pressure to cerebral oxyhemoglobin concentration in the low-frequency range in hypertensive patients (p<0.0083).
Why the study?
The study aimed to investigate the effect of an auricular acupuncture intervention on the relationship between changes in oxyhemoglobin concentration and arterial blood pressure in patients with hypertension.
Does auricular acupuncture improve the relationship between cerebral hemodynamics and arterial blood pressure in patients with hypertension?
Does auricular acupuncture improve the relationship between cerebral hemodynamics and arterial blood pressure in patients with hypertension?
Auricular acupuncture significantly altered the coupling between arterial blood pressure and cerebral oxyhemoglobin concentration, suggesting improved cerebral hemodynamic responses in hypertensive patients.
Answers are grounded in this paper and cite their sources.
May warrant trials of auricular acupuncture for cerebral autoregulation in hypertension; leaves open clinical benefits.
The present study aimed to investigate the effect of an auricular acupuncture intervention on the relationship between changes in oxyhemoglobin concentration (Δ [O2Hb]) and arterial blood pressure (ABP). The cerebral oxygenation signals in the bilateral prefrontal cortex (PFC), sensorimotor cortex (SMC), and temporal lobe cortex (TLC) of 15 patients with hypertension were measured by a 24-channel functional near-infrared spectroscopy (fNIRS) device before (State_R) and after (State_AT) the auricular acupuncture intervention. Coupling strength was used to quantitatively evaluate the strength of the couplings between ABP and Δ [O2Hb] in low-frequency oscillations (LF, 0.07–0.2 Hz) and very-low-frequency oscillations (VLF, 0.02–0.07 Hz). Results showed that the changes in wavelet amplitudes in the LF and VLF intervals did not exhibit significant differences after auricular acupuncture. The coupling strength from ABP to Δ [O2Hb] was significantly lower in the LF range after auricular acupuncture in the bilateral PFC, SMC, and TLC (p < 0.0083). Additionally, the coupling strength from ABP to Δ [O2Hb] in the VLF range was significantly lower in the bilateral PFC in State_AT than in State_R (p < 0.0083). These results indicated that fNIRS together with ABP can effectively evaluate cerebral hemodynamic responses to interventions and is therefore capable of guiding more individualized acupuncture strategies. The auricular acupuncture intervention improved hemodynamic responses in patients suffering from hypertension.
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Li et al. (2021) studied hypertension (n=15). Auricular acupuncture vs. Before intervention (State_R) was evaluated on Coupling strength from arterial blood pressure to changes in oxyhemoglobin concentration in low-frequency and very-low-frequency oscillations (p=<0.0083). Auricular acupuncture significantly reduced the coupling strength from arterial blood pressure to cerebral oxyhemoglobin concentration in the low-frequency range in hypertensive patients (p<0.0083).
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