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  • 1.
    Tullberg, Mats
    et al.
    Univ Gothenburg, Sweden.
    Toma, Ahmed K.
    Natl Hosp Neurol & Neurosurg, England.
    Yamada, Shigeki
    Nagoya City Univ, Japan.
    Laurell, Katarina
    Linköpings universitet, Institutionen för biomedicinska och kliniska vetenskaper, Avdelningen för neurobiologi. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Sinnescentrum, Neurologiska kliniken i Linköping.
    Miyajima, Masakazu
    Juntendo Tokyo Koto Geriatr Med Ctr, Japan.
    Watkins, Laurence D.
    Natl Hosp Neurol & Neurosurg, England.
    Wikkelso, Carsten
    Univ Gothenburg, Sweden.
    Classification of Chronic Hydrocephalus in Adults: A Systematic Review and Analysis2024Inngår i: World Neurosurgery, ISSN 1878-8750, E-ISSN 1878-8769, Vol. 183, s. 113-122Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    BACKGROUND: Chronic hydrocephalus in adults (CHiA) includes all nonacute forms of hydrocephalus occurring in adulthood. It covers a spectrum of disorders. Some of these have relatively agreed on definitions, while others are less well characterized. The existing medical classification systems lack adequate structure and are neither clinically oriented nor easy to use, which severely hampers research and clinical care efforts. METHODS: A systematic literature review and data analysis were performed, focusing on the terms "adult hydrocephalus" and "classification," using the PubMed, Scopus, and Cochrane Library databases. Data on terminology, defiitions, patient demographics, symptom duration, and clinical presentations were extracted, analyzed, and compiled. A Delphi process was followed to define CHiA disorders. RESULTS: A total of 33 studies collectively used 48 terms to define various CHiA disorders. Different terms were used to describe similar conditions. CHiA disorders were found to be clustered into 7 distinctive clinical entities based on the clinical characteristics. CONCLUSIONS: An evidence-based new clinical classification for CHiA is suggested. Our review identified gaps in knowledge and areas for further research.

  • 2.
    Andren, Kerstin
    et al.
    Univ Gothenburg, Sweden.
    Wikkelso, Carsten
    Univ Gothenburg, Sweden.
    Laurell, Katarina
    Linköpings universitet, Institutionen för biomedicinska och kliniska vetenskaper, Avdelningen för neurobiologi. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Sinnescentrum, Neurologiska kliniken i Linköping.
    Kollen, Lena
    Univ Gothenburg, Sweden.
    Hellstrom, Per
    Univ Gothenburg, Sweden.
    Tullberg, Mats
    Univ Gothenburg, Sweden.
    Symptoms and signs did not predict outcome after surgery: a prospective study of 143 patients with idiopathic normal pressure hydrocephalus2024Inngår i: Journal of Neurology, ISSN 0340-5354, E-ISSN 1432-1459Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    ObjectiveTo determine the utility of symptoms, signs, comorbidities and background variables for the prediction of outcome of treatment in iNPH. MethodsA prospective observational study of consecutively included iNPH patients, who underwent neurological, physiotherapeutic and neuropsychological assessments before and after shunt surgery. The primary outcome measure was the total change on the iNPH scale, and patients were defined as improved postoperatively if they had improved by at least five points on that scale. Results143 iNPH patients were included, and 73% of those were improved after surgery. None of the examined symptoms or signs could predict which patients would improve after shunt surgery. A dominant subjective complaint of memory problems at baseline was predictive of non-improvement. The reported comorbidities, duration of symptoms and BMI were the same in improved and non-improved patients. Each of the symptom domains (gait, neuropsychology, balance, and continence) as well as the total iNPH scale score improved significantly (from median 53 to 69, p < 0.001). The proportions of patients with shuffling gait, broad-based gait, paratonic rigidity and retropulsion all decreased significantly. DiscussionThis study confirms that the recorded clinical signs, symptoms, and impairments in the adopted clinical tests are characteristic findings in iNPH, based on that most of them improved after shunt surgery. However, our clinical data did not enable predictions of whether patients would respond to shunt surgery, indicating that the phenotype is unrelated to the reversibility of the iNPH state and should mainly support diagnosis. Absence of specific signs should not be used to exclude patients from treatment.

  • 3.
    Liden, Simon
    et al.
    Uppsala Univ, Sweden; Ostersund Hosp, Sweden.
    Farahmand, Dan
    Univ Gothenburg, Sweden.
    Laurell, Katarina
    Linköpings universitet, Institutionen för biomedicinska och kliniska vetenskaper, Avdelningen för cell- och neurobiologi. Linköpings universitet, Medicinska fakulteten. Region Östergötland, Sinnescentrum, Neurologiska kliniken i Linköping. Uppsala Univ, Sweden.
    Volumetric effect of shunt adjustments in normal pressure hydrocephalus: a randomized, double-blind trial2024Inngår i: Journal of Neurosurgery, ISSN 0022-3085, E-ISSN 1933-0693, Vol. 140, nr 5, s. 1493-1500Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    OBJECTIVE MRI volumetry could be used as an alternative to invasive tests of shunt function. In this study, the authors aimed to assess the difference in ventricular volume (VV) before and after surgery and at different performance levels (PLs) of the shunt. METHODS This study was a randomized, double-blind trial with a crossover design. The study sample consisted of 36 patients (25 men, 11 women) with a median age of 76 years. All patients had idiopathic normal pressure hydrocephalus (iNPH) and received a Strata shunt at the regional hospital in & Ouml;stersund, Sweden, with an initial PL of 1.5. Participants underwent MRI with volumetric sequences before surgery and four times postoperatively: at 1 month before randomization to either PL 1.0 (n = 15) or 2.5 (n = 17); at 2 months before crossover to PL 2.5 or 1.0; at 3 months before lowering the PL to 0.5; and finally, at 3 months and 1 day after surgery before resetting the PL to 1.5. VV was measured semiautomatically using quantitative MRI. Both the patient and the examiner of clinical tests and volumetry were blinded to the PL. RESULTS VV changed significantly between the presurgical level (median 129 ml) and the different shunt settings, i.e., PL 1.0 (median 115 ml), 1.5 (median 120 ml), and 2.5 (median 128 ml; p < 0.001). A unidirectional change in VV was observed for all participants between PL 1.0 and PL 2.5 (median 12 ml, range 2.1-40.7 ml, p < 0.001). No significant change was noted in VV after 24 hours at PL 0.5. Eight participants had asymptomatic subdural effusions at PL 1.0. CONCLUSIONS The consistent decrease in VV after shunt surgery and between PL 2.5 and 1.0 supports the idea that MRI volumetry could be a noninvasive method for evaluating shunt function in iNPH, preventing unnecessary shunt revisions. However, further studies on retest variability of VV as well as verification against advanced testing of shunt function are needed before a clinical implementation of this method can be performed.

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