TY - JOUR
T1 - Noninvasive intracranial pressure estimation with transcranial doppler
T2 - A prospective observational study
AU - Cardim, Danilo
AU - Robba, Chiara
AU - Czosnyka, Marek
AU - Savo, Davide
AU - Mazeraud, Aurelién
AU - Iaquaniello, Carolina
AU - Banzato, Erika
AU - Rebora, Paola
AU - Citerio, Giuseppe
N1 - Publisher Copyright:
© 2020 Lippincott Williams and Wilkins. All rights reserved.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - Background:Transcranial Doppler (TCD) ultrasonography has been described for the noninvasive assessment of intracranial pressure (ICP). This study investigates the relationship between standard, invasive intracranial pressure monitoring (ICPi) and noninvasive ICP assessment using a simple formula based on TCD-derived flow velocity (FV) and mean arterial blood pressure values (ICPTCD).Material and Methods:We performed a prospective observational study on 100 consecutive traumatic brain injury patients requiring invasive ICP monitoring, admitted to the Neurosciences and Trauma Critical Care Unit of Addenbrooke's Hospital, Cambridge, UK. ICPiwas compared with ICPTCDusing a method based on the "diastolic velocity-derived estimator" (FVd), which was initially described for the noninvasive estimation of cerebral perfusion pressure but subsequently utilized for ICP assessment.Results:Median ICPiwas 13 mm Hg (interquartile range: 10, 17.25 mm Hg). There was no correlation between ICPiand ICPTCD(R=-0.17; 95% confidence interval [CI]: -0.35, 0.03; P=0.097). Bland-Altman analysis demonstrated wide 95% limits of agreement between ICPiand ICPTCD(-27.58, 30.10; SD, 14.42). ICPTCDwas not able to detect intracranial hypertension (ICPi>20 mm Hg); the area under the receiver operating characteristic curve for prediction was 34.5% (95% CI, 23.1%-45.9%) with 0% sensitivity and 74.4% specificity for ICPTCDto detect ICPi>20 mm Hg.Conclusions:Using a formula based on diastolic FV, TCD is an insufficiently accurate method for the noninvasive assessment of ICP. Further studies are warranted to confirm these results in a broader patient cohort.
AB - Background:Transcranial Doppler (TCD) ultrasonography has been described for the noninvasive assessment of intracranial pressure (ICP). This study investigates the relationship between standard, invasive intracranial pressure monitoring (ICPi) and noninvasive ICP assessment using a simple formula based on TCD-derived flow velocity (FV) and mean arterial blood pressure values (ICPTCD).Material and Methods:We performed a prospective observational study on 100 consecutive traumatic brain injury patients requiring invasive ICP monitoring, admitted to the Neurosciences and Trauma Critical Care Unit of Addenbrooke's Hospital, Cambridge, UK. ICPiwas compared with ICPTCDusing a method based on the "diastolic velocity-derived estimator" (FVd), which was initially described for the noninvasive estimation of cerebral perfusion pressure but subsequently utilized for ICP assessment.Results:Median ICPiwas 13 mm Hg (interquartile range: 10, 17.25 mm Hg). There was no correlation between ICPiand ICPTCD(R=-0.17; 95% confidence interval [CI]: -0.35, 0.03; P=0.097). Bland-Altman analysis demonstrated wide 95% limits of agreement between ICPiand ICPTCD(-27.58, 30.10; SD, 14.42). ICPTCDwas not able to detect intracranial hypertension (ICPi>20 mm Hg); the area under the receiver operating characteristic curve for prediction was 34.5% (95% CI, 23.1%-45.9%) with 0% sensitivity and 74.4% specificity for ICPTCDto detect ICPi>20 mm Hg.Conclusions:Using a formula based on diastolic FV, TCD is an insufficiently accurate method for the noninvasive assessment of ICP. Further studies are warranted to confirm these results in a broader patient cohort.
KW - Intracranial hypertension
KW - Intracranial pressure
KW - Transcranial Doppler
UR - http://www.scopus.com/inward/record.url?scp=85069528892&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069528892&partnerID=8YFLogxK
U2 - 10.1097/ANA.0000000000000622
DO - 10.1097/ANA.0000000000000622
M3 - Article
C2 - 31306262
AN - SCOPUS:85069528892
SN - 0898-4921
VL - 32
SP - 349
EP - 353
JO - Journal of Neurosurgical Anesthesiology
JF - Journal of Neurosurgical Anesthesiology
IS - 4
ER -