N
Nicolás de Riva
Researcher at University of Barcelona
Publications - 19
Citations - 733
Nicolás de Riva is an academic researcher from University of Barcelona. The author has contributed to research in topics: Cerebral blood flow & Cerebral perfusion pressure. The author has an hindex of 10, co-authored 17 publications receiving 618 citations. Previous affiliations of Nicolás de Riva include University of Cambridge.
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Journal ArticleDOI
Transcranial Doppler Pulsatility Index: What it is and What it Isn’t
Nicolás de Riva,Nicolás de Riva,Karol P. Budohoski,Peter Smielewski,Magdalena Kasprowicz,Magdalena Kasprowicz,Christian Zweifel,Christian Zweifel,Luzius A. Steiner,Luzius A. Steiner,Matthias Reinhard,Matthias Reinhard,Neus Fàbregas,John D. Pickard,Marek Czosnyka,Marek Czosnyka +15 more
TL;DR: TCD pulsatility index can be easily and quickly assessed but is usually misinterpreted as a descriptor of CVR, which presents a complex relationship between PI and multiple haemodynamic variables.
Journal ArticleDOI
Reliability of the blood flow velocity pulsatility index for assessment of intracranial and cerebral perfusion pressures in head-injured patients.
Christian Zweifel,Christian Zweifel,Marek Czosnyka,Emmanuel Carrera,Nicolás de Riva,John D. Pickard,Peter Smielewski +6 more
TL;DR: Overall, the value of TCD-PI to assess ICP and CPP noninvasively is very limited, however, extreme values of PI can still potentially be used in support of a decision for invasive ICP monitoring.
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The relationship between cerebral blood flow autoregulation and cerebrovascular pressure reactivity after traumatic brain injury.
Karol P. Budohoski,Marek Czosnyka,Nicolás de Riva,Nicolás de Riva,Peter Smielewski,John D. Pickard,David K. Menon,Peter J. Kirkpatrick,Andrea Lavinio +8 more
TL;DR: To assess to what degree impairment in pressure reactivity (PRx) is associated with impairment in cerebral autoregulation (Mx), a database of 345 patients with traumatic brain injury was screened for data availability including simultaneous Mx and PRx monitoring.
Journal ArticleDOI
Portal hyperperfusion: mechanism of injury and stimulus for regeneration in porcine small-for-size transplantation.
Constantino Fondevila,Amelia J. Hessheimer,Pilar Taura,Olga Sánchez,David Calatayud,Nicolás de Riva,Javier Muñoz,José Fuster,Antoni Rimola,Juan Carlos García-Valdecasas +9 more
TL;DR: This porcine model not only helps to elucidate the inciting factors in SFS pathogenesis but also offers a clinically relevant means to study its prevention.
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Ultrasound-guided popliteal sciatic block with a single injection at the sciatic division results in faster block onset than the classical nerve stimulator technique.
TL;DR: A single injection of LA in US-SPB with needle insertion at the separation of the TN and CPN results in a similar success rate at 30 minutes; however, more patients in the US- SPB group than in the NS-spB group had complete block at 15 minutes.