Observation of intracranial hemodynamics in brain death through transcranial doppler ultrasound
10.3760/cma.j.issn.1008-6706.2012.21.004
- VernacularTitle:经颅多普勒超声对脑死亡患者颅内血流动力学的观察
- Author:
Yuzhen WANG
;
Yitao HE
- Publication Type:Journal Article
- Keywords:
Ultrasonography,doppler,transcranial;
Brain death;
Blood flow velocity
- From:
Chinese Journal of Primary Medicine and Pharmacy
2012;19(21):3206-3207
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the evolution process of cerebral blood flow spectrum in brain death by transcranial doppler ultrasound.Methods To detect the blood flow of bilateral middle cerebral artery in brain dead patients by transcranial doppler ultrasound.Results Twenty brain dead patients were collected in the study.The blood flow velocity of middle cerebral artery ranged s from 6 to 37cm/s,and the mean velocity was (12.13 ± 3.15)cm/s.There were three characteristic spectrums which include oscillatory wave (reverse wave in diastolic),nails wave (tip small wave in systolic),no blood flow sign,and they appeared in turn accoerding to worsen of the disease.The heartbeat irreversibly stopped within 8 days after the appearing of oscillatory wave,and ninty percent of the cases had the regular blood flow spectrums of oscillatory wave-nails wave-no blood flow sign.Conclusion The three regularly characteristic transcranial doppler ultrasound blood flow spectrums,which include oscillatory wave,nails wave and no blood flow sign could facilitate the diagnosis of brain death.
