tailieunhanh - Báo cáo y học: "Using MRI of the optic nerve sheath to detect elevated intracranial pressure"

Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học Critical Care giúp cho các bạn có thêm kiến thức về ngành y học đề tài: Using MRI of the optic nerve sheath to detect elevated intracranial pressure. | Available online http content 12 5 181 Commentary Using MRI of the optic nerve sheath to detect elevated intracranial pressure Heidi Harbison Kimberly and Vicki E Noble Department of Emergency Medicine Massachusetts General Hospital Harvard Medical School Boston MA 02114 USA Corresponding author Heidi Harbison Kimberly hkimberly@. Vicki E Noble vnoble@ See related research by Geeraerts et al. http content 12 5 R114 Published 24 September 2008 This article is online at http content 12 5 181 2008 BioMed Central Ltd Critical Care 2008 12 181 doi cc7008 Abstract The current gold standard for the diagnosis of elevated intracranial pressure ICP remains invasive monitoring. Given that invasive monitoring is not always available or clinically feasible there is growing interest in non-invasive methods of assessing ICP using diagnostic modalities such as ultrasound or magnetic resonance imaging MRI . Increased ICP is transmitted through the cerebrospinal fluid surrounding the optic nerve causing distention of the optic nerve sheath diameter ONSD . In this issue of Critical Care Geeraerts and colleagues describe a non-invasive method of diagnosing elevated ICP using MRI to measure the ONSD. They report a positive correlation between measurements of the ONSD on MRI and invasive ICP measurements. If the findings of this study can be replicated in larger populations this technique may be a useful non-invasive screening test for elevated ICP in select populations. The recognition that elevated intracranial pressure ICP is transmitted through the optic nerve and its sheath has been known for many years. This physiological process is the basis for the physical exam finding of papilledema on fundoscopic examination. Recently interest has turned to measurement of the optic nerve sheath diameter ONSD through non-invasive imaging technologies to provide surrogate markers for early elevated ICP. In this issue of .