S Fridriksson

University Hospital Linköping, Linköping, Östergötland, Sweden

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Publications (5)17.23 Total impact

  • J Hillman · S Fridriksson · ZQ Yu · O Nilsson · H Saveland · KE Jakobsson ·

    Journal of Neurosurgery 10/2002; 97(4):751-752. · 3.74 Impact Factor
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    A-M Landtblom · S Fridriksson · J Boivie · J Hillman · G Johansson · I Johansson ·
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    ABSTRACT: Sudden onset headache is a common condition that sometimes indicates a life-threatening subarachnoid haemorrhage (SAH) but is mostly harmless. We have performed a prospective study of 137 consecutive patients with this kind of headache (thunderclap headache=TCH). The examination included a CT scan, CSF examination and follow-up of patients with no SAH during the period between 2 days and 12 months after the headache attack. The incidence was 43 per 100 000 inhabitants >18 years of age per year; 11.3% of the patients with TCH had SAH. Findings in other patients indicated cerebral infarction (five), intracerebral haematoma (three), aseptic meningitis (four), cerebral oedema (one) and sinus thrombosis (one). Thus no specific finding indicating the underlying cause of the TCH attack was found in the majority of the patients. A slightly increased prevalence of migraine was found in the non-SAH patients (28%). The attacks occurred in 11 cases (8%) during sexual activity and two of these had an SAH. Nausea, neck stiffness, occipital location and impaired consciousness were significantly more frequent with SAH but did not occur in all cases. Location in the temporal region and pressing headache quality were the only features that were more common in non-SAH patients. Recurrent attacks of TCH occurred in 24% of the non-SAH patients. No SAH occurred later in this group, nor in any of the other patients. It was concluded that attacks caused by a SAH cannot be distinguished from non-SAH attacks on clinical grounds. It is important that patients with their first TCH attack are investigated with CT and CSF examination to exclude SAH, meningitis or cerebral infarction. The results from this and previous studies indicate that it is not necessary to perform angiography in patients with a TCH attack, provided that no symptoms or signs indicate a possible brain lesion and a CT scan and CSF examination have not indicated SAH.
    Cephalalgia 06/2002; 22(5):354-60. DOI:10.1046/j.1468-2982.2002.00368.x · 4.89 Impact Factor
  • S Fridriksson · J Hillman · A M Landtblom · J Boive ·
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    ABSTRACT: Forty percent of patients with aneurysmal subarachnoid hemorrhage have prodromal warning episodes and difficulties in identifying these events are repeatedly documented. Modifications of diagnostic and referral patterns through educational programs of local doctors may help to identify such patients before a major devastating rupture occurs. A teaching program about sudden onset headache, targeting referring doctors, was systematically applied and its impact on early misdiagnosis of ruptured aneurysms was prospectively studied. Forty percent of all studied patients experienced a warning episode, manifested as apoplectic headache, prior to hospitalization. An initial diagnostic error was evident in 12% of the patients. Diagnostic errors were reduced by 77% as a result of continuous interaction between neurosurgeons and local physicians. Misdiagnosed warning episodes cause greater loss of lives and higher morbidity on a population basis than does delayed ischemic complications from vasospasm in aneurysmal SAH. Teaching programs focused on local physicians have a profound impact on outcome at low cost.
    Acta Neurologica Scandinavica 05/2001; 103(4):238-42. DOI:10.1034/j.1600-0404.2001.103004238.x · 2.40 Impact Factor
  • A.-M. Landtblom · J. Boivie · S. Fridriksson · J. Hillman · G. Johansson · I. Johansson ·

    Journal of the Neurological Sciences 09/1997; 150. DOI:10.1016/S0022-510X(97)84995-7 · 2.47 Impact Factor
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    ABSTRACT: A study of the overall management of ruptured posterior fossa aneurysms was conducted over a 1-year period (1993) in five neurosurgical centers in Sweden, serving a population of 6.93 million people. Forty-nine cases were identified and treated. One-third of the patients were in the seventh or eighth decade of life. Good overall management outcomes at 6 months were achieved in 30 cases (61%). The overall mortality rate was 27%. Patients with Hunt and Hess Grades I and II had a good overall recovery rate of 87%. On admission, 69% of the patients were assigned Hunt and Hess Grades III to V. The impact on patient outcomes of the intraoperative difficulties encountered, especially in the basilar tip area, is stressed. The authors found that delayed operation is not warranted in most cases. Frequent devastating rebleeding was observed among patients not offered early aneurysm clipping and the operative results were not at significant variance between the early and late surgical groups. Only 50% of the patients scheduled for delayed surgery ultimately made a good recovery, whereas 72% of patients scheduled for early operation did so. The data demonstrate that overall management results with posterior fossa aneurysms, comparable to achievements with supratentorial lesions, are within the reach of modern strategies, even in centers not specializing in these problems.
    Journal of Neurosurgery 08/1996; 85(1):33-8. DOI:10.3171/jns.1996.85.1.0033 · 3.74 Impact Factor