中国神经再生研究(英文版) ›› 2020, Vol. 15 ›› Issue (5): 944-947.doi: 10.4103/1673-5374.268906

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

疑似神经系统疾病者血清和脑脊液的渗透压

  

  • 出版日期:2020-05-15 发布日期:2020-06-01

Osmotic pressure of serum and cerebrospinal fluid in patients with suspected neurological conditions

Tetsuya Akaishi1, 2, Toshiyuki Takahashi2, 3, Ichiro Nakashima4, Michiaki Abe1, Masashi Aoki2, Tadashi Ishii1   

  1. 1 Department of Education and Support for Regional Medicine, Tohoku University Hospital, Sendai, Japan
    2 Department of Neurology, Tohoku University Graduate School of Medicine, Sendai, Japan
    3 Department of Neurology, National Hospital Organization Yonezawa National Hospital, Yonezawa, Japan
    4 Department of Neurology, Tohoku Medical and Pharmaceutical University, Sendai, Japan
  • Online:2020-05-15 Published:2020-06-01
  • Contact: Tetsuya Akaishi, MD, PhD,t-akaishi@med.tohoku.ac.jp.

摘要:

脑组织间液运动被认为有助于维持脑实质的代谢并维持神经元和神经胶质细胞的功能,血清和脑脊液之间的异常渗透压差异可能通过扰乱实质内的大量血流而引起神经元和神经胶质功能障碍。为了阐明血清与脑脊液渗透压之间的关系,此次前瞻性观察研究对179名疑似神经系统疾病的受试者的血清和脑脊液渗透压进行了检测。结果发现血清和脑脊液渗透压分别为283.6±6.5289.5±6.6mOsm/kg。因为已知血清与脑脊液的比重分别为1.024-1.0281.004-1.007,所以血清和脑脊液中的渗透压的估计平均值覆盖的范围完全相同(即290.5-291.5 mOsm/L)。脑脊液渗透压与血清渗透压有非常强的相关性,但血清和脑脊液之间观察到的渗透压差异与血清渗透压、血清电解质水平、蛋白质水平或白蛋白商无关。总之,脑脊液渗透压与血清渗透压相等,因此,渗透压不是脑组织液大量流动的因素之一。应寻求其他因素,如静水压力梯度,以解释脑实质中脑组织间液运动的机制。本研究于2015729日经东北大学医院机构审查委员会批准(IRB No. 2015-1-257;批准)。

orcid: 0000-0001-6728-4966 (Tetsuya Akaishi)

关键词: 神经元, 神经胶质细胞, 神经系统疾病, 脑实质, 大流量, 脑脊液, 静水压力, 间质液, 渗透压

Abstract: Interstitial fluid movement in the brain parenchyma has been suggested to contribute to sustaining the metabolism in brain parenchyma and maintaining the function of neurons and glial cells. The pulsatile hydrostatic pressure gradient may be one of the driving forces of this bulk flow. However, osmotic pressure- related factors have not been studied until now. In this prospective observational study, to elucidate the relationship between osmolality (mOsm/kg) in the serum and that in the cerebrospinal fluid (CSF), we simultaneously measured the serum and CSF osmolality of 179 subjects with suspected neurological conditions. Serum osmolality was 283.6 ± 6.5 mOsm/kg and CSF osmolality was 289.5 ± 6.6 mOsm/kg. Because the specific gravity of serum and CSF is known to be 1.024–1.028 and 1.004–1.007, respectively, the estimated average of osmolarity (mOsm/L) in the serum and CSF covered exactly the same range (i.e., 290.5–291.5 mOsm/L). There was strong correlation between CSF osmolality and serum osmolality, but the difference in osmolality between serum and CSF was not correlated with serum osmolality, serum electrolyte levels, protein levels, or quotient of albumin. In conclusion, CSF osmolarity was suggested to be equal to serum osmolarity. Osmolarity is not one of the driving forces of this bulk flow. Other factors such as hydrostatic pressure gradient should be used to explain the mechanism of bulk flow in the brain parenchyma. This study was approved by the Institutional Review Board of the Tohoku University Hospital (approval No. IRB No. 2015-1-257) on July 29, 2015.

Key words: brain parenchyma, bulk flow, cerebrospinal fluid, hydrostatic pressure, interstitial fluid, osmolarity, osmotic pressure