Objective To observe the efficacy and safety of Bushen Huoxue Prescription in the treatment of kidney deficiency and blood stasis type primary osteoporosis. Methods Totally 50 patients with kidney deficiency and blood stasis type primary osteoporosis were collected. They were given Bushen Huoxue Prescription granules twice a day, taking with water, for 12 weeks. Before and after treatment, the femoral neck, Ward's area, L1–4 bone mineral density (BMD) were measured. VAS and TCM syndrome integrals were evaluated before and 4, 8 and 12 week of treatment. The level of serum osteocalcin (OC), β-C-terminal telopeptides of type I collagen (β-CTX) and osteoprotegerin (OPG) were detected before and after treatment. Hematuria routine, liver and kidney function were under safety testing before and after treatment. Results Bushen Huoxue Prescription could significantly increase BMD of left femoral neck and Ward's triangle (P=0.001, P=0.044). L1–4 BMD increased, without statistical significance (P=0.172). The total effective rate was 60.870% (28/46) for L1–4 and left femoral neck and 58.696% (27/46) for Ward's triangle. The VAS and TCM syndrome integral decreased significantly 4 weeks treatment compared with that before the treatment (P<0.01), and the scores decreased significantly with the prolongation of treatment time (F=159.690, P<0.001; F=163.970, P<0.001). After 12 weeks, treatment, the total effective rate for TCM syndromes was 78.26% (36/46). Serum levels of OC and β-CTX showed a tendency to increase, while serum levels of OPG showed a tendency to decrease, without statistical significance (P=0.087, P=0.091, P=0.419). There was no serious adverse reaction in hematuria routine and liver and kidney function. Conclusion Bushen Huoxue Prescription has obvious clinical efficacy for kidney deficiency and blood stasis type primary osteoporosis, which can improve the patients' BMD, improve bone metabolism, relive bone pain, with high level of safety.

The requirement for unconstrained monitoring of heartbeat during sleep is increasing, but the current detection devices can not meet the requirements of convenience and accuracy. This study designed an unconstrained ballistocardiogram (BCG) detection system using acceleration sensor and developed a heart rate extraction algorithm. BCG is a directional signal which is stronger and less affected by respiratory movements along spine direction than in other directions. In order to measure the BCG signal along spine direction during sleep, a 3-axis acceleration sensor was fixed on the bed to collect the vibration signals caused by heartbeat. An approximate frequency range was firstly assumed by frequency analysis to the BCG signals and segmental filtering was conducted to the original vibration signals within the frequency range. Secondly, to identify the true BCG waveform, the accurate frequency band was obtained by comparison with the theoretical waveform. The J waves were detected by BCG energy waveform and an adaptive threshold method was proposed to extract heart rates by using the information of both amplitude and period. The accuracy and robustness of the BCG detection system proposed and the algorithm developed in this study were confirmed by comparison with electrocardiogram (ECG). The test results of 30 subjects showed a high average accuracy of 99.21% to demonstrate the feasibility of the unconstrained BCG detection method based on vibration acceleration.
Acceleration ; Ballistocardiography ; Electrocardiography ; Heart Rate ; Humans ; Signal Processing, Computer-Assisted ; Vibration