Skip to content

Home Search Authors Pakistan News Saved

SciRah

SciRah does not host or store research papers. Results come live from free, official scholarly APIs, and every paper links back to its original source.

Data sources

OpenAlex
Semantic Scholar
Crossref
CORE
arXiv
PubMed

Privacy policy Terms of service

R. Kivisaari · SciRah

Researcher profile · Semantic Scholar

R. Kivisaari

Share profile

R. Kivisaari — researcher profile on SciRah

h-index: 35
Works: 146
Citations: 5,688

Most-cited papers

Traumatic brain injury: integrated approaches to improve prevention, clinical care, and research
A. Maas, D. Menon, P. Adelson, N. Andelic +331 more
2017Lancet Neurology2,127 citations Open access
Semantic Scholar
Predicting outcome in traumatic brain injury: development of a novel computerized tomography classification system (Helsinki computerized tomography score).
R. Raj, J. Siironen, M. Skrifvars, J. Hernesniemi +1 more
2014Neurosurgery161 citations
Semantic Scholar
Size and location of ruptured intracranial aneurysms: consecutive series of 1993 hospital-admitted patients.
M. Korja, R. Kivisaari, Behnam Rezai Jahromi, H. Lehto
2017Journal of Neurosurgery107 citations
Semantic Scholar
Evaluation of novel computerized tomography scoring systems in human traumatic brain injury: An observational, multicenter study
E. Thelin, D. Nelson, Juho Vehviläinen, Harriet Nyström +6 more
2017PLoS Medicine98 citations Open access
Semantic Scholar
Predicting six-month mortality of patients with traumatic brain injury: usefulness of common intensive care severity scores
R. Raj, M. Skrifvars, S. Bendel, T. Selander +3 more
2014Critical Care80 citations Open access
Semantic Scholar
Long-Term Excess Mortality After Aneurysmal Subarachnoid Hemorrhage: Patients With Multiple Aneurysms at Risk
J. Huhtakangas, H. Lehto, K. Seppä, R. Kivisaari +3 more
2015Stroke79 citations Open access
Semantic Scholar
Transition From Microscopic to Endoscopic Transsphenoidal Surgery for Nonfunctional Pituitary Adenomas.
A. Karppinen, L. Kivipelto, S. Vehkavaara, Elina Ritvonen +6 more
2015World Neurosurgery73 citations
Semantic Scholar
High Risk Population Isolate Reveals Low Frequency Variants Predisposing to Intracranial Aneurysms
M. Kurki, E. Gaál, J. Kettunen, T. Lappalainen +31 more
2014PLoS Genetics71 citations Open access
Semantic Scholar
Single-Dose Intraventricular Nimodipine Microparticles Versus Oral Nimodipine for Aneurysmal Subarachnoid Hemorrhage
Andrew P. Carlson, D. Hänggi, George K. C. Wong, N. Etminan +85 more
2020Stroke66 citations
Semantic Scholar
Distal posterior inferior cerebellar artery aneurysms: clinical features and outcome of 80 patients.
H. Lehto, A. Harati, M. Niemelä, R. Dashti +7 more
2014World Neurosurgery63 citations
Semantic Scholar
Natural History of Ruptured but Untreated Intracranial Aneurysms
M. Korja, R. Kivisaari, Behnam Rezai Jahromi, H. Lehto
2017Stroke60 citations Open access
Semantic Scholar
Shared Genetic Risk Factors of Intracranial, Abdominal, and Thoracic Aneurysms
F. V. '. van 't Hof, Y. Ruigrok, Cue Hyunkyu Lee, S. Ripke +66 more
2016Journal of the American Heart Association : Cardiovascular and Cerebrovascular Disease60 citations Open access
Semantic Scholar
Surgical Clipping of Very Small Unruptured Intracranial Aneurysms: A Multicenter International Study.
M. Bruneau, S. Amin-Hanjani, P. Koroknay-Pál, Philippe Bijlenga +9 more
2016Neurosurgery58 citations Open access
Semantic Scholar
Mortality in Elderly Patients Operated for an Acute Subdural Hematoma: A Surgical Case Series.
R. Raj, Era D Mikkonen, R. Kivisaari, M. Skrifvars +2 more
2016World Neurosurgery58 citations
Semantic Scholar
GENOME-WIDE ASSOCIATION STUDY OF INTRACRANIAL ANEURYSM IDENTIFIES A NEW ASSOCIATION ON CHROMOSOME 7
T. Foroud, Dong-Bing Lai, D. Koller, F. van’t Hof +36 more
2014Stroke58 citations Open access
Semantic Scholar
Acute Alcohol Intoxication and Long-Term Outcome in Patients with Traumatic Brain Injury
R. Raj, M. Skrifvars, R. Kivisaari, J. Hernesniemi +2 more
2015Journal of Neurotrauma56 citations Open access
Semantic Scholar
Predicting Outcome after Traumatic Brain Injury: Development of Prognostic Scores Based on the IMPACT and the APACHE II
R. Raj, J. Siironen, R. Kivisaari, J. Hernesniemi +1 more
2014Journal of Neurotrauma45 citations Open access
Semantic Scholar
Burr-hole drainage with or without irrigation for chronic subdural haematoma (FINISH): a Finnish, nationwide, parallel-group, multicentre, randomised, controlled, non-inferiority trial.
R. Raj, Pihla Tommiska, Timo Koivisto, V. Leinonen +15 more
2024The Lancet44 citations Open access
Semantic Scholar
Limiting CT radiation dose in children with craniosynostosis: phantom study using model-based iterative reconstruction
T. Kaasalainen, K. Palmu, A. Lampinen, V. Reijonen +3 more
2015Pediatric Radiology41 citations
Semantic Scholar
Motility of glioblastoma cells is driven by netrin-1 induced gain of stemness
Irene Ylivinkka, H. Sihto, O. Tynninen, Yi-Zhou Hu +5 more
2017Journal of experimental & clinical cancer research : CR36 citations Open access
Semantic Scholar
Intensive care of traumatic brain injury and aneurysmal subarachnoid hemorrhage in Helsinki during the Covid-19 pandemic
T. Luostarinen, Jyri J. Virta, J. Satopää, M. Bäcklund +3 more
2020Acta Neurochirurgica33 citations Open access
Semantic Scholar
Characteristics of posterior cerebral artery aneurysms: an angiographic analysis of 93 aneurysms in 81 patients.
F. Goehre, B. R. Jahromi, J. Hernesniemi, A. Elsharkawy +5 more
2014Neurosurgery33 citations Open access
Semantic Scholar
The focus of temperature monitoring with zero-heat-flux technology (3M Bair-Hugger): a clinical study with patients undergoing craniotomy
E. Pesonen, M. Silvasti-Lundell, T. Niemi, R. Kivisaari +2 more
2018Journal of clinical monitoring and computing32 citations Open access
Semantic Scholar
Intraputamenal Cerebral Dopamine Neurotrophic Factor in Parkinson's Disease: A Randomized, Double‐Blind, Multicenter Phase 1 Trial
H. Huttunen, Sigrid Booms, M. Sjögren, V. Kerstens +30 more
2023Movement Disorders31 citations Open access
Semantic Scholar
Incidence of surgery for chronic subdural hematoma in Finland during 1997-2014: a nationwide study.
Pihla Tommiska, T. Luostarinen, J. Kaprio, M. Korja +3 more
2021Journal of Neurosurgery31 citations
Semantic Scholar
CTA analysis and assessment of morphological factors related to rupture in 413 posterior communicating artery aneurysms
J. Huhtakangas, M. Lehecka, H. Lehto, B. R. Jahromi +2 more
2017Acta Neurochirurgica31 citations Open access
Semantic Scholar
Focused opening of the sylvian fissure for microsurgical management of MCA aneurysms
A. Elsharkawy, M. Niemelä, M. Lehecka, H. Lehto +4 more
2013Acta Neurochirurgica31 citations
Semantic Scholar
Subtemporal approach to posterior cerebral artery aneurysms.
F. Goehre, M. Lehecka, B. R. Jahromi, H. Lehto +9 more
2015World Neurosurgery30 citations
Semantic Scholar
Temporal Trends in Healthcare Costs and Outcome Following ICU Admission After Traumatic Brain Injury
R. Raj, S. Bendel, M. Reinikainen, S. Hoppu +10 more
2018Critical Care Medicine29 citations Open access
Semantic Scholar
Posterior Cerebral Artery Aneurysms: Treatment and Outcome Analysis in 121 Patients.
F. Goehre, B. R. Jahromi, M. Lehecka, H. Lehto +11 more
2016World Neurosurgery29 citations
Semantic Scholar
Genetic risk load according to the site of intracranial aneurysms
F. V. '. van 't Hof, M. Kurki, R. Kleinloog, P. D. de Bakker +12 more
2014Neurology29 citations
Semantic Scholar
Early Moderate Hyperoxemia Does Not Predict Outcome After Aneurysmal Subarachnoid Hemorrhage.
Maarit Lång, R. Raj, M. Skrifvars, T. Koivisto +5 more
2016Neurosurgery28 citations
Semantic Scholar
Contralateral Approach to Internal Carotid Artery Ophthalmic Segment Aneurysms: Angiographic Analysis and Surgical Results for 30 Patients.
Hugo Andrade-Barazarte, J. Kivelev, F. Goehre, B. R. Jahromi +7 more
2015Neurosurgery26 citations
Semantic Scholar
Intracranial Vertebral Artery Aneurysms: Clinical Features and Outcome of 190 Patients.
H. Lehto, M. Niemelä, R. Kivisaari, A. Laakso +5 more
2015World Neurosurgery25 citations
Semantic Scholar
Validation of the revised injury severity classification score in patients with moderate-to-severe traumatic brain injury.
R. Raj, Tuomas Brinck, M. Skrifvars, R. Kivisaari +3 more
2015Injury23 citations
Semantic Scholar
Contralateral Approach to Bilateral Middle Cerebral Artery Aneurysms: Comparative Study, Angiographic Analysis, and Surgical Results.
Hugo Andrade-Barazarte, J. Kivelev, F. Goehre, B. R. Jahromi +7 more
2015Neurosurgery23 citations
Semantic Scholar
Increased prevalence of pancreaticobiliary maljunction in biliary malignancies
I. Hyvärinen, M. Hukkinen, R. Kivisaari, H. Parviainen +2 more
2019Scandinavian Journal of Surgery22 citations Open access
Semantic Scholar
Size of Ruptured Intracranial Aneurysms Is Decreasing: Twenty-Year Long Consecutive Series of Hospitalized Patients
M. Korja, R. Kivisaari, Behnam Rezai Jahromi, H. Lehto
2018Stroke22 citations
Semantic Scholar
Double-Clip Technique for the Microneurosurgical Management of Very Small (<3 mm) Intracranial Aneurysms
Narayanam Anantha Sai Kiran, B. R. Jahromi, J. C. Velásquez, Ferzat Hijazy +6 more
2015Neurosurgery19 citations
Semantic Scholar
Transfusion Frequency of Red Blood Cells, Fresh Frozen Plasma, and Platelets During Ruptured Cerebral Aneurysm Surgery.
T. Luostarinen, H. Lehto, M. Skrifvars, R. Kivisaari +4 more
2015World Neurosurgery18 citations
Semantic Scholar
Comparison of CT and clinical findings of Terson's syndrome in 121 patients: a 1-year prospective study.
E. Koskela, J. Pekkola, R. Kivisaari, T. Kivelä +3 more
2014Journal of Neurosurgery17 citations
Semantic Scholar
Temporal changes in outcome following intensive care unit treatment after traumatic brain injury: a 17-year experience in a large academic neurosurgical centre
Matias Lindfors, Juho Vehviläinen, J. Siironen, R. Kivisaari +2 more
2018Acta Neurochirurgica16 citations
Semantic Scholar
Motor outcome and electrode location in deep brain stimulation in Parkinson's disease
M. Koivu, Antti Huotarinen, F. Scheperjans, A. Laakso +2 more
2018Brain and Behavior16 citations Open access
Semantic Scholar
Eye movement abnormalities after a ruptured intracranial aneurysm.
E. Koskela, A. Laakso, R. Kivisaari, K. Setälä +2 more
2015World Neurosurgery16 citations
Semantic Scholar
Finnish study of intraoperative irrigation versus drain alone after evacuation of chronic subdural haematoma (FINISH): a study protocol for a multicentre randomised controlled trial
Pihla Tommiska, R. Raj, C. Schwartz, R. Kivisaari +12 more
2020BMJ Open15 citations Open access
Semantic Scholar
Primary decompressive craniectomy is associated with worse neurological outcome in patients with traumatic brain injury requiring acute surgery
Julius Tapper, M. Skrifvars, R. Kivisaari, J. Siironen +1 more
2017Surgical neurology international14 citations Open access
Semantic Scholar
Seventy aneurysms of the posterior inferior cerebellar artery: anatomical features and value of computed tomography angiography in microneurosurgery.
H. Lehto, R. Kivisaari, M. Niemelä, R. Dashti +6 more
2014World Neurosurgery13 citations
Semantic Scholar
Transition of a clinical practice to use of subdural drains after burr-hole evacuation of chronic subdural haematomas: The Helsinki experience.
Pihla Tommiska, K. Lönnrot, R. Raj, T. Luostarinen +1 more
2019World Neurosurgery12 citations Open access
Semantic Scholar
Presigmoid Approach to Vertebrobasilar Artery Aneurysms: A Series of 31 Patients and Review of the Literature.
Mardjono Tjahjadi, M. Niemelä, J. Kivelev, Joseph C. Serrone +7 more
2016World Neurosurgery12 citations
Semantic Scholar
Intracranial Aneurysm Classifier Using Phenotypic Factors: An International Pooled Analysis
S. Morel, I. Hostettler, Georg R. Spinner, R. Bourcier +54 more
2022Journal of Personalized Medicine11 citations Open access
Semantic Scholar

Frequent co-authors

Invite them to SciRah by sharing their profile.

J. Hernesniemi×25
Invite
J. Hernesniemi — researcher profile on SciRah
H. Lehto×23
Invite
H. Lehto — researcher profile on SciRah
R. Raj×16
Invite
R. Raj — researcher profile on SciRah
M. Niemelä×15
Invite
M. Niemelä — researcher profile on SciRah

×12

Invite

M. Skrifvars — researcher profile on SciRah

Invite

A. Laakso — researcher profile on SciRah

B. R. Jahromi×12

Invite

B. R. Jahromi — researcher profile on SciRah

J. Siironen×10

Invite

J. Siironen — researcher profile on SciRah

M. von Und zu Fraunberg×9

Invite

M. von Und zu Fraunberg — researcher profile on SciRah

J. Jääskeläinen×9

Invite

J. Jääskeläinen — researcher profile on SciRah

Invite

F. Goehre — researcher profile on SciRah

Invite

M. Korja — researcher profile on SciRah