泌尿神經(jīng)系統(tǒng)電刺激及抑制作用機(jī)理研究
[Abstract]:After spinal cord injury, bladder can not store urine effectively. Because of detrusor overactivity, bladder malaise always occurs frequently. Due to detrusor and sphincter disorders, the bladder can not be well emptied, resulting in a large amount of urine residue in the bladder. Most patients with spinal cord injury emptied their bladder by artificial catheterization. However, urinary catheterization and residual large amounts of urine in the bladder can lead to bladder infection, and long-term high bladder stress can lead to various serious urinary system diseases. Restoring bladder function after spinal cord injury is a major challenge that requires two main functions: on the one hand, to suppress the overactivity of the bladder detrusor during urinary storage, and, on the other hand, during urination. Causes the bladder to contract significantly to exclude as much urine as possible. In order to solve the above two problems, this paper mainly does the following work: 1. To test whether the waveform generated by controlling a wireless, implantable electrical stimulator can be achieved: 1) blocking the pudendal nerve conduction and relaxing the external urethral sphincter; 2) promoting a large, Continuous contraction of bladder, 3) inhibition of bladder reflex activity and increase of bladder urine storage. 2. 2. In the HH model of unmyelinated nerve, the effect of high frequency biphasic asymmetric waveform electrical stimulation on the blocking of unmyelinated nerve was studied by lumped circuit. Recovery after blocking nerve conduction by high frequency electrical stimulation. The results show that: 1. The stimulator can achieve the desired effect, that is, inhibit the excessive activity of the bladder detrusor muscle, and can promote a large contraction of the bladder; 2. With the increase of frequency, asymmetric and symmetrical waveforms are different in blocking nerve conduction by high-frequency biphasic electrical stimulation, and the ion channel inactivation caused by asymmetric high-frequency electrical stimulation is the blocking mechanism. 3. After high frequency electrical stimulation blocked nerve conduction, the nerve conduction function could be recovered. The recovery period was related to the intensity and time of high frequency electrical stimulation, and had nothing to do with frequency.
【學(xué)位授予單位】:北京交通大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:R691
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