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Sökning: hsv:(MEDICIN OCH HÄLSOVETENSKAP) hsv:(Klinisk medicin) > (1990-1999)

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  • Sjöholm, H, et al. (författare)
  • Necrosis of malignant gliomas after intratumoral injection of 201Tl in vivo in the rat
  • 1995
  • Ingår i: Anti-Cancer Drugs. - Rapid Communications. - 0959-4973. ; 6:1, s. 109-114
  • Tidskriftsartikel (refereegranskat)abstract
    • Fourteen adult Fischer 344 rats were inoculated in vivo unilaterally in the caudate nucleus in the brain with malignant RG 2 glioma cells. By 3 weeks a tumor with a diameter of 3-6 mm normally develops. Ten animals which survived the repeated periods of anesthesia and thallium (Tl) injections (intratumorally three times of 201Tl, 15-23 days after inoculation) showed a prolonged retention of radioactivity at the site of injection with no uptake in other organs except for the kidneys. Singular circumscribed necroses were found post-mortem at the site of injection, comprising malignant glioma tumor tissue, which in six animals was absent, in three animals was markedly reduced in size compared with controls and in one animal had the expected size. In four animals metastases were found in distant locations in the brain; in three of these cases there was a retention of radioactivity in the tumor. The selective necrotizing effect on the tumor cells is interpreted as mainly due to emission of Auger electrons from intracellularly accumulated 201Tl, giving rise to very high energy deposition in the vicinity of the cell nucleus. The results should also have implications for the treatment of human malignant gliomas.
  • Berntorp, Erik, et al. (författare)
  • Centraliserad vård grundläggande i vårdprogram för blödarsjuka
  • 1999
  • Ingår i: Läkartidningen. - Swedish Medical Association. - 0023-7205. ; 96:15, s. 1849-1852
  • Tidskriftsartikel (refereegranskat)abstract
    • Haemophilia is a rare and potentially life-threatening disease. In Sweden, with a population of approximately 8.5 million, about 350 people suffer from the more severe forms of haemophilia or von Willebrand disease. Meticulous management is important if the patients are to be spared chronic disability and serious treatment complications. The disease is lifelong and affects psychosocial aspects of life among patients and their families. With the help of a grant from the Swedish Board of Halth and Welfare, a care programme has been designed to guarantee Swedish haemophiliacs comparable and optimal care. The programme has been drawn up by representatives of the three haemophilia centres in Sweden (at University Hospital, Malmo, Sahlgrenska University Hospital, Gothenburg, and Karolinska Hospital, Stockholm) in co-operation with the World Federation of National Haemophilia Organisations. To ensure optimal individual application of the programme, individualised management strategies and patient information leaflets have been prepared.
  • Karlsson, Caroline, et al. (författare)
  • 5-Hydroxytryptamine contracts human uterine artery smooth muscle predominantly via 5-HT2 receptors
  • 1997
  • Ingår i: Human Reproduction. - Oxford University Press. - 0268-1161. ; 12:2, s. 361-367
  • Tidskriftsartikel (refereegranskat)abstract
    • Serotonergic receptors were classified in the isolated human uterine artery with intact endothelium, using agonists and antagonists for 5-hydroxytryptamine (5-HT) receptors. The efficacy for different agonists rated: alpha-methyl-5-HT (5-HT2) = 5-HT (non-selective) = 2-methyl-5-HT (5-HT3) >> sumatriptan (5-HT1), and the potency as: sumatriptan = 5-HT > 5-HT > alpha-methyl-5-HT > 2-methyl-5-HT. The contractile effects of 5-HT and alpha-methyl-5-HT were antagonized by the 5-HT2 receptor antagonist ketanserin and the non-selective antagonist methiothepin. The efficacy of sumatriptan was comparatively low. No interaction was encountered between 2-methyl-5-HT and MDL72222, suggesting an absence of 5-HT3 receptors. The results indicate that the contractile serotonergic receptor population in the human uterine artery mainly comprises 5-HT2 receptors, although a minor contribution of contractile 5-HT1 receptors cannot be excluded.
  • Karlsson, Caroline, et al. (författare)
  • Characterization of 5-hydroxytryptamine receptors mediating circular smooth muscle contraction in the human umbilical artery
  • 1999
  • Ingår i: Gynecologic and Obstetric Investigation. - Karger. - 1423-002X. ; 47:2, s. 102-107
  • Tidskriftsartikel (refereegranskat)abstract
    • The study was performed to characterize pharmacologically the contractile 5-hydroxytryptamine (5-HT) receptors in the circular smooth muscle of the isolated human umbilical artery. Effects of agonists and antagonists for different 5-HT receptor subtypes were studied in intact endothelium vessel segments. All agonists induced concentration-dependent circular smooth muscle contractions. The potency was in declining order 5-HT > alpha-methyl-5-HT > sumatriptan >/= 2-methyl-5-HT. The effects of 5-HT and alpha-methyl-5-HT were antagonized by ketanserin, as well as methiothepin. The contractile effect of sumatriptan was antagonized by methiothepin but not by ketanserin. The 5-HT3 receptor antagonist, MDL 72222, did not affect the contraction by any of the agonists, including 2-methyl-5-HT. It is concluded that the 5-HT-induced contraction in the circular smooth muscle of the human umbilical artery seems to be mediated by a mixed population of 5-HT1-like receptors and 5-HT2 receptors.
  • Lindqvist, A, et al. (författare)
  • Artery blood pressure oscillation after active standing up: an indicator of sympathetic function in diabetic patients
  • 1997
  • Ingår i: Clinical Physiology. - Wiley Online Library. - 1365-2281. ; 17:2, s. 159-169
  • Tidskriftsartikel (refereegranskat)abstract
    • Dynamic artery blood pressure (Finapres) response to active standing up, normally consisting of initial rise, fall and recovery above the baseline (overshoot), was compared with the early steady-state artery blood pressure level to measure sympathetic vasomotor function in healthy subjects (n = 23, age 35 +/- 9 years; mean +/-SD) and in type I diabetic patients without autonomic neuropathy (AN) (group 1: n = 18, 38 +/- 13 years), with AN but no cardiovascular drugs (group 2a: n = 7, 44 +/- 11 years) and with both AN and cardiovascular drugs (group 2b: n = 10, 47 +/- 7 years). Systolic and diastolic overshoot were similar in the control (15 +/- 13/15 +/- 11 mmHg) and group 1 subjects. Systolic overshoot disappeared in 57% of patients in group 2a (-1 +/- 9 mmHg; P < 0.03), whereas artery blood pressure still overshot in diastole (8 +/- 7 mmHg; NS). Systolic overshoot disappeared in all patients in group 2b (-22 +/- 22 mmHg; P < 0.0006) and diastolic overshoot disappeared in 60% of these patients (-6 +/- 16 mmHg; P = 0.0006). Systolic early steady-state level was not lower in group 2a than in group 1 (NS), but it was impaired in group 2b (P < 0.006), in which six diabetic patients had a pathological response beyond the age-related reference values. There was a strong association between the overshoot and steady-state levels (P for chi 2 < 0.001, n = 58). Overshoot of the control subjects and patients in group 2b correlated to their respective steady-state blood pressure levels (r > or = 0.76; P < or = 0.001). In conclusion, baroreceptor reflex-dependent overshoot of the artery blood pressure after active standing up diminishes with the development of AN and it is associated with the early steady-state level of the artery blood pressure.
  • Torffvit, Ole, et al. (författare)
  • The association between diabetic nephropathy and autonomic nerve function in type 1 diabetic patients
  • 1997
  • Ingår i: Scandinavian Journal of Clinical & Laboratory Investigation. - Informa Healthcare. - 1502-7686. ; 57:2, s. 183-191
  • Tidskriftsartikel (refereegranskat)abstract
    • Diabetic cardiovascular autonomic neuropathy increases the risk of deterioration in renal function and is associated with increased mortality in patients with renal failure. Type 1 diabetic patients with long diabetes duration, matched for age (38 +/- 9 years) and diabetes duration (28 +/- 8 years) were studied regarding the association between cardiovascular autonomic nerve function and different degrees of diabetic nephropathy. Eighteen patients were normo- (< 30 mg/l), six micro- (30-300 mg/l), and 13 macroalbuminuric (> 300 mg/l) based on urinary albumin concentrations in three separate morning samples. They were compared with 33 control subjects with similar age. Autonomic nerve function was evaluated by measuring the response of heart rate to deep breathing and active standing. Beat-to-beat finger artery blood pressure (Finapres) was tested during active standing. During deep breathing both change in heart rate (17 +/- 11, 9 +/- 7 and 4 +/- 3 beats/min) and ratio between expiratory and inspiratory R-R intervals (1.32 +/- 0.24, 1.14 +/- 0.15 and 1.05 +/- 0.04) decreased from normo- over micro- to macroalbuminuria (p < 0.05 vs normoalbuminuric and control subjects [17 +/- 5 beats/min and 1.28 +/- 0.10, respectively]). Similar results were obtained during active standing with respect to change in systolic arterial blood pressure (3 +/- 8, 2 +/- 13 and -6 +/- 11 mmHg; p < 0.05 vs control subjects [8 +/- 11 mmHg]). However, the response of diastolic arterial blood pressure or mean heart rate to standing up did not differ between any of the groups. The ratio of maximum to minimum R-R interval during the dynamic response of heart rate to active standing decreased with the degree of nephropathy (1.27 +/- 0.17, 1.11 +/- 0.11 and 1.05 +/- 0.06) with significantly higher values in patients with normo- compared with patients with macroalbuminuria (p < 0.05). All patients groups had significantly lower values than control subjects (1.46 +/- 0.22, p < 0.05). The overshoot of the blood pressure after an initial fall during active standing decreased with the degree of diabetic nephropathy. In conclusion, type 1 diabetic patients with long duration of diabetes have signs of cardiovascular autonomic neuropathy, the severity of which is related to the degree of nephropathy.
  • Brandt, Lennart, et al. (författare)
  • Myelography in the late postoperative period in patients subjected to anterior cervical decompression and fusion
  • 1993
  • Ingår i: Acta Neurochirurgica. - Springer. - 0001-6268. ; 122:1-2, s. 97-101
  • Tidskriftsartikel (refereegranskat)abstract
    • During a 13 year period, 286 patients with cervical disc herniation and/or spondylotic spurs, were subjected to anterior decompression and vertebral interbody fusion with autologous bone. Twenty patients were re-admitted in the late postoperative period due to recurrent radicular symptoms and/or signs of myelopathy. In these patients myelography was performed again. In 14 patients spinal cord compression and/or nerve root involvement at a new level was visualized. At the operated level, however, the myelograms demonstrated a smooth anterior wall in the spinal canal. The series confirms the safety, effectiveness and reliability of the Cloward procedure in achieving long term spinal cord and nerve root decompression, and a solid vertebral interbody fusion.
  • Hedbrant, Johan, 1959-, et al. (författare)
  • Ny mätmetod för käkmuskulaturen kan finna orsaken till tinnitus Slutrapport Nutek 92-11904
  • 1997
  • Ingår i: Nutek 92-11904. - Stockholm : Nutek - Närings- och teknikutvecklingsverket.
  • Rapport (övrigt vetenskapligt)abstract
    • <p>Tinnitus är en åkomma som i lindrigare eller allvarligare former drabbar 17% av västvärldens befolkning. Ca 85 000 svenskar har tinnitus på invalidiserande nivå. Förutom mänskligt lidande orsakar tinnitus samhällskostnader på ca 1.5 miljard kr årligen. Orsaken är till största delen okänd.</p><p>Vissa tecken tyder på ett samband mellan tinnitus och funktionsstörning i en käkmuskel. Några olika icke–invasiva metoder för mätning av muskelstörning i M Pterygoideus Lateralis har utvärderas. Två av dessa är intressanta för fortsatta studier.</p><p>Termografi användes för att diagnosticera muskelstörningar på ytligt liggande muskler. Vi såg åtskilliga varma områden på ytliga käk– och nackmuskler på de patienter som hade käkledsstörningar, samt möjligen tecken på onormal värme från M Pterygoideus Lateralis. Mätförhållandena var dock ej ideala.</p><p>En metod att mäta EMG med adaptiv noise cancelling provades. EMG från en ryggmuskel, stört av en “EKG–signal” från hjärtat användes. Metoden fungerade bra. Fortsatt metodutveckling på t.ex. ryggmuskler borde göras.</p>
  • Norgren, Lars, et al. (författare)
  • Immune response to collagen impregnated Dacron double velour grafts for aortic and aorto-femoral reconstructions
  • 1990
  • Ingår i: European Journal of Vascular Surgery. - Elsevier. - 0950-821X. ; 4:4, s. 379-384
  • Tidskriftsartikel (refereegranskat)abstract
    • This study presents 20 patients, randomised to receive either a collagen-treated or an ordinary Dacron graft for aortic reconstructions, and the results of a skin-prick test, blood parameters and ELISA for anti-collagen antibodies as well as NMR pictures during a 6 week follow-up period. Forty per cent (4/11) of those receiving a collagen impregnated graft had a significantly increased titre of antibodies and NMR revealed in two out of 11 patients either a slightly increased amount of fluid or fibrosis around the graft, both collagen impregnated. No differences were found between the graft groups concerning body temperature and leucocyte or platelet counts. The skin-prick test for collagen was negative in all cases.
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