TY - JOUR T1 - HIgh-altitude cerebral edema—reply AU - Hackett P, Yarnell P Y1 - 1999/05/19 N1 - 10-1001/pubs.JAMA-ISSN-0098-7484-281-19-jbk0519 JO - JAMA SP - 1794 EP - 1794 VL - 281 IS - 19 N2 - The findings published by Dr Surks 33 years ago have been confirmed in many subsequent studies. The mechanism of this shift of fluid from the vascular space on ascent to high altitude and the exact division of the fluid between the intracellular and interstitial spaces are not as clear. Nor is it known whether the brain participates in this fluid translocation to the same extent as other tissues. The studies done by Surks et al were in persons without altitude illness. In those who are ill with acute mountain sickness, a net fluid retention or antidiuresis also takes place, which would aggravate any fluid shift into the brain that might be taking place and contribute to cerebral edema. However, the fluid shift from the vascular space does not, in itself, provide a clue as to whether and to what extent the brain is involved, and as to whether the brain edema is cytotoxic (intracellular) or vasogenic (blood-brain barrier leak of proteins and water). SN - 0098-7484 M3 - doi: 10-1001/pubs.JAMA-ISSN-0098-7484-281-19-jbk0519 UR - http://dx.doi.org/10-1001/pubs.JAMA-ISSN-0098-7484-281-19-jbk0519 ER -