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  • Admittance plethysmography  (3)
  • Key words Prostate cancer  (3)
  • plasma diagnostics  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    International journal of clinical oncology 5 (2000), S. 334-336 
    ISSN: 1437-7772
    Schlagwort(e): Key words Prostate cancer ; IgE myeloma ; Asymptomatic
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract An unusual case of the simultaneous occurrence of prostate cancer and IgE myeloma is reported. A 74-year-old man with urinary disturbance and elevated serum prostate-specific antigen level, of 7.4 ng/ml, showed Bence-Jones protein in the urine. Immunoelectrophoresis of the serum showed elevation of IgE kappa monoclonal protein. Radical prostatectomy was performed as a curative therapy for T1c, Gleason 3-2 prostate cancer. The patient has remained free of progression of both the myeloma and the prostate cancer for 26 months after the initial diagnosis.
    Materialart: Digitale Medien
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  • 2
    ISSN: 1437-7772
    Schlagwort(e): Key words Prostate cancer ; Systematic biopsy ; Transrectal ultrasonography ; Prostate-specific antigen ; T1c cancer
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Background. Random systematic biopsy is widely utilized for the diagnosis of prostate cancer. The standard method seems to be transrectal ultrasonography (TRUS)-guided sextant transrectal biopsy. In this study, the results of a TRUS-guided transperineal technique were evaluated. Methods. Between 1993 and 1996, 102 patients were diagnosed with prostate cancer by random systematic transperineal biopsy. Eight cores (four from the ventral side and four from the rectal side) were taken from each patient while the longitudinal section was monitored by TRUS. The lengths of the whole core and the cancerous lesion were measured in each biopsy specimen. The results of systematic biopsy were examined in relation to the findings of digital rectal examination (T category), histological grade, clinical stage, and serum level of prostate-specific antigen (PSA). Results. The number of positive cores increased with the T category. The percentage of cancers in the biopsy specimens also increased according to T category. In patients without metastasis, there was a weak correlation between the level of serum PSA and the cube of the total lengths of cancerous lesions in the biopsy specimens. Nonpalpable T1 cancers had more positive cores and a greater percentage of cancer on the ventral side, while in palpable cancers, cancerous tissues were found more often and at a greater incidence on the rectal side. Conclusion. There was a correlation between the clinical stage of prostate cancer and the pathological findings of random systematic transperineal biopsy under TRUS guidance.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    International journal of clinical oncology 5 (2000), S. 345-354 
    ISSN: 1437-7772
    Schlagwort(e): Key words Prostate cancer ; Chromosome ; Loss of heterozygosity ; Tumor suppressor gene ; Metastasis suppressor gene
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Cytogenetic, molecular cytogenetic, and molecular studies of prostate cancer have produced a large volume of data about chromosomal loci that are aberrant in prostate cancer. The cumulative data on prostate cancer reveal allelic losses on chromosome arms 2q, 3p, 5q, 6q, 7q, 8p, 9p, 10p, 10q, 11p, 11q, 12p, 13q, 16q, 17p, 17q, 18q, and 21q, but there is a great deal of variability between studies. In most cases, the frequency of allelic loss is higher in metastatic tissues or hormone-refractory tumors than in primary tumors. There also seem to be discrepancies in the genetic findings depending on methods employed. Molecular genetic studies, using polymerase chain reaction (PCR) analysis of microsatellite markers, demonstrated allelic loss at 7q31.1, whereas fluorescence in situ hybridization analysis showed a gain at the same region. Com-mon sites of allelic loss that are consistently observed by various methods seem to exist on chromosome arms 8p, 10q, 13q, and 16q. PTEN/MMAC1 has been identified on 10q23.3 and was found to be frequently mutated in advanced prostate cancer. Other regions are also considered to harbor genes associated with the development and progression of prostate cancer, and these could be included in the diagnostic methods for the substaging of prostate cancer.
    Materialart: Digitale Medien
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    International journal of infrared and millimeter waves 4 (1983), S. 549-559 
    ISSN: 1572-9559
    Schlagwort(e): interferometer ; polarimeter ; water-vapor laser ; far-infrared ; plasma diagnostics ; compact toroid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A high-power CW 27.972 μm water-vapor laser has been developed for interferometric and polarimetric measurements of plasmas. The maximum output power and the power density in the cavity of the laser with 2.0 cm bore and 220 cm length reach 85 mW and 109 μW/cm3, respectively. An interferometer using this laser is constructed and its performance is examined as a study on polarimetric method of magnetic field measurement. Preliminary interferometric experiments are also carried out on a compact toroidal plasma with field-reversal configuration.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    International journal of infrared and millimeter waves 2 (1981), S. 1199-1208 
    ISSN: 1572-9559
    Schlagwort(e): water vapor laser ; plasma diagnostics ; interferometer ; waveguide laser ; far-infrared
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A high-power CW 27.972 μm water vapor laser has been constructed in order to use as a light source of an interferometer for plasma diagnostics. The laser consists of 220 cm length and 2.0 cm small bore Pyrex glass discharge tube, semi-confocal resonator and Michelson coupler. From the measurement of cavity detuning curves, it is found that two waveguide modes, EH11 and EH21 oscillate. The increase of the output power is found to become more than seven times larger by adding He(50%)−H2(50%) mixed gas. Under the optimum condition, the maximum output power of 65 mW or the output power per unit cavity volume of 83 μW/cm3 is obtained.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    International journal of infrared and millimeter waves 5 (1984), S. 1039-1052 
    ISSN: 1572-9559
    Schlagwort(e): H2O laser ; Faraday rotation ; polarimetry ; far-infrared ; plasma diagnostics ; compact toroid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A fast response frequency-modulated interferometric polarimeter was designed and constructed with a single 28 μm H2O laser for high density plasma diagnostics. This newly developed modulation system employs an electro-magnetically driven movable mirror to achieve the modulation frequency beyound 1 MHz for about 100 μs duration. The movable mirror performance is studied experimentally in detail. The determination of the Faraday rotation angle is based on the zero-crossing method for the observed beat signals produced by two kinds of rotating plane-polarized waves. The feasibility of the polarimeter constructed was verified in experiments of a field-reversed thetapinch plasma.
    Materialart: Digitale Medien
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Medical & biological engineering & computing 19 (1981), S. 426-432 
    ISSN: 1741-0444
    Schlagwort(e): Admittance plethysmography ; Respiration rate ; Stroke volume ; Three-channel telemetry ; Total transthoracic admittance
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract A three-channel frequency-modulation telemetry system for the noninvasive measurement of cardiac output, rate of respiration, e.c.g. and basal transthoracic admittance of the unconstrained human subject is described. Tetrapolar admittance plethysmography has been employed to obtain the transthoracic admittance and its variations corresponding to the cardiac cycle and respiratory changes. Pulse duration modulation has been used in the transmitter system. The nonlinearity of the system is less than ±2·0%. The telemetry transmitter has a range of about 100 m, it weights approximately 200 g and is contained in a box measuring 150×100×50 mm. The batteries used provide a continuous life of 20 h. The system has been used to obtain data from normal subjects in different postures with breath hold and during normal respiration.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    Medical & biological engineering & computing 26 (1988), S. 641-646 
    ISSN: 1741-0444
    Schlagwort(e): Admittance plethysmography ; Arterial compliance ; Human limb ; Noninvasive measurement ; Volume elastic modulus ; Volume oscillometric method
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract Arterial elasticity expressed by such indices as volume elastic modulus Ev and compliance Ca were noninvasively measured in various human limb segments; the upper arms, forearms, fingers, thighs, calves and toes. These indices are defined, respectively, as $$E_v = \Delta P/(\Delta V/\bar V_a )$$ and Ca=ΔV/ΔP, where ΔP is pulse pressure, $$\bar V_a $$ mean arterial volume and ΔV its pulsatile variation. ΔP was calculated from systolic Pas and mean Pam arterial pressures determined by volume oscillometric sphygmomanometry using the following equation: $$\Delta P = 3(P_{as} - P_{am} )/2\bar V_a $$ and the ΔV were detected by electrical admittance plethysmography at various transmural pressure Pt levels controlled by a compression cuff. The values obtained in these limb segments were compared with each other at Pt levels 0,30 and 60 mm Hg and the differences between them were discussed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    Medical & biological engineering & computing 23 (1985), S. 43-47 
    ISSN: 1741-0444
    Schlagwort(e): Admittance plethysmography ; Arterial compliance ; Arterial volume ; Vascular unloading technique ; Volume elastic modulus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie , Medizin
    Notizen: Abstract Static and dynamic (beat-to-beat) arterial viscoelastic properties were measured noninvasively in human fingers and forearms. The volume change and pressure change were detected simultaneously by admittance plethysmography and by sphygmomanometry using the vascular unloading technique in the index and middle finger, or vice versa. These simultaneous measurements were also made on the forearms of one side and the fingers of the other side. The arterial viscoelastic properties in these segments could be successfully determined at different transmural pressure levels from 0 mm Hg to around the mean arterial pressure.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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