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Hufnagl P, Bayer G, Oberbamscheidt P, Wehrstedt K, Guski H, Hauptmann S, Dietel M. Comparison of different telepathology solutions for primary frozen section diagnostic. Anal Cell Pathol 2000; 21:161-7. [PMID: 11339563 PMCID: PMC4618815 DOI: 10.1155/2000/123057] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In a retrospective study on a set of 125 cases we compared the following three telepathology solutions for primary frozen section diagnosis: ATM-TP (connection via ATM), TPS 1.0 (connection via LAN) and TELEMIC (connection via Internet), which represent different concepts of telepathological procedures. A set of 125 routine frozen sections (breast) was selected from the Charité cases of the year 1999. Four experienced pathologists diagnosed retrospectively all of these cases using the ATM-TP and TPS systems and 53 of them with the TELEMIC system. Using the ATM-TP we recorded no false positive (0%), 4 false negative (3.2%) and 4 deferred (3.2%) cases. Using the TPS we recorded no false positive (0%), 4 false negative (3.2%) and 4 deferred (3.2%) cases. Using the TELEMIC we recorded in 53 cases no false positive (0%), no false negative (0%) and 16 deferred (30.2%) cases. The average time of 2.2 minutes per case using ATM-TP is also short enough for routine frozen section diagnostic. This is also true for the TPS system with 7.2 minutes per case.
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Brössner C, Madersbacher S, Bayer G, Pycha A, Klingler HC, Maier U. Comparative study of two different TRUS-guided sextant biopsy techniques in detecting prostate cancer in one biopsy session. Eur Urol 2000; 37:65-71. [PMID: 10671788 DOI: 10.1159/000020102] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The aim of this study was to compare a transrectal ultrasound (TRUS)-guided sextant biopsy technique, which puts more emphasis on the apical region of the prostate where most prostate carcinomas (PCs) develop, with the standard sextant biopsy technique. METHODS A total of 280 patients with suspected PC were included in this analysis. Twelve biopsy cores were obtained from all patients. Six biopsy cores were taken within a lateral parasagittal plane from each lobe at the apex, middle and basis, with an angle of approximately 45 degrees (technique A), and 6 further biopsy cores were taken from the left to the right lateral margin always penetrating the prostate in the apex with the same angle (socalled fan-shaped technique, technique B). Technique A predominantly samples in the sagittal and technique B samples more in the transversal plane with emphasis on the apical region where most PCs develop. The sensitivity in detecting PCs for both techniques was calculated and correlated to the serum prostate-specific antigen (PSA) levels. RESULTS A total of 72 PCs (25.7%) were diagnosed. We subsequently performed subgroup analysis depending on the serum PSA levels: in patients with a PSA of </=10 ng/ml (n = 27) technique A has a PC sensitivity of 88.8% (p = 0.037) and technique B 96.2% (p = 0.326) as compared to our reference standard of 100% by sampling 12 biopsy cores in the same prostate. The number of positive biopsy cores using technique B was superior in 12 cases as compared to 3 cases with technique A (p = 0.04). In 12 patients the number of positive biopsy cores was identically. In patients with a PSA of >10 ng/ml (n = 45) technique A has a PC sensitivity of 93.3% (p = 0.083) and technique B 88.8% (p = 0.023) as compared to our reference standard. The number of positive core biopsies using technique A was superior in 14 cases as compared to 12 with technique B (p = 0.154). In 19 patients the number of positive biopsies was identical. CONCLUSION Our data suggest that in patients with PSA of </=10 ng/ml technique B bring significant benefit with regard to the number of positive core biopsies, as well as an enhanced PC detection rate which is near the 12-core biopsy. Due to the fact that technique B samples more in the apical region where most cancers develop, it should be performed in suspected early stage cancers of the prostate (PSA</=10 ng/ml).
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Almer G, Hainfellner JA, Brücke T, Jellinger K, Kleinert R, Bayer G, Windl O, Kretzschmar HA, Hill A, Sidle K, Collinge J, Budka H. Fatal familial insomnia: a new Austrian family. Brain 1999; 122 ( Pt 1):5-16. [PMID: 10050890 DOI: 10.1093/brain/122.1.5] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present clinical, pathological and molecular features of the first Austrian family with fatal familial insomnia. Detailed clinical data are available in five patients and autopsy in four patients. Age at onset of disease ranged between 20 and 60 years, and disease duration between 8 and 20 months. Severe loss of weight was an early symptom in all five patients. Four patients developed insomnia and/or autonomic dysfunction, and all five patients developed motor abnormalities. Analysis of the prion protein (PrP) gene revealed the codon 178 point mutation and methionine homozygosity at position 129. In all brains, neuropathology showed widespread cortical astrogliosis, widespread brainstem nuclei and tract degeneration, and olivary 'pseudohypertrophy' with vacuolated neurons, in addition to neuropathological features described previously, such as thalamic and olivary degeneration. Western blotting of one brain and immunocytochemistry in four brains revealed quantitative and regional dissociation between PrP(res)(the protease resistant form of PrP) deposition and histopathology. In the cerebellar cortex of one patient, PrP(res) deposits were prominent in the molecular layer and displayed a peculiar patchy and strip-like pattern with perpendicular orientation to the surface. In another patient, a single vacuolated neuron in the inferior olivary nuclei contained prominent intravacuolar granular PrP(res) deposits, resembling changes of brainstem neurons in bovine spongiform encephalopathy.
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Wagner SM, Bayer G, Fröhlich R, Lang V, Bolz A, Schaldach M. [Blood flow measurement for implantable devices. Experimental results]. BIOMED ENG-BIOMED TE 1998; 43 Suppl:134-5. [PMID: 9859293 DOI: 10.1515/bmte.1998.43.s1.134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bayer G, Fröhlich R, Zinner G, Behrend D, Schmitz KP, Schaldach M. [Development of a surface coating for spinal cord stimulation]. BIOMED ENG-BIOMED TE 1998; 43 Suppl:556-7. [PMID: 9859489 DOI: 10.1515/bmte.1998.43.s1.556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Rzany A, Bayer G, Bolz A, Schaldach M. [Atomic force study of solid body-induced blood coagulation in relation to electronic surface properties]. BIOMED ENG-BIOMED TE 1998; 42 Suppl:43-4. [PMID: 9517039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Rzany A, Bayer G, Bolz A, Schaldach M. AFM-Untersuchung der festkörperinduzierten Blutgerinnung in Abhängigkeit von den elektronischen Oberflächeneigenschaften. BIOMED ENG-BIOMED TE 1997. [DOI: 10.1515/bmte.1997.42.s2.43] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bayer G, Rzany A, Bolz A, Schaldach M, Hahn CY, Uttich T, Müller P. Rastersondenmikroskopische Untersuchung des Fibrinogens als zentralem Protein der festkörperinduzierten Blutgerinnung. BIOMED ENG-BIOMED TE 1996. [DOI: 10.1515/bmte.1996.41.s1.628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bayer G, Niederdränk T. Weak localization of acoustic waves in strongly scattering media. PHYSICAL REVIEW LETTERS 1993; 70:3884-3887. [PMID: 10053990 DOI: 10.1103/physrevlett.70.3884] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Wiedemann G, Bayer G. Kinetics of the formation of whewellite and weddelite by displacement reactions. ACTA ACUST UNITED AC 1988. [DOI: 10.1007/bf02138577] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bayer G. Natürliche und synthetische Rubine: Eigenschaften und Bestimmung by K. Schmetzer. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 1987. [DOI: 10.1107/s010876818709801x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bayer G. Einfuehrung in die Kristallographie by W. Kleber. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 1984. [DOI: 10.1107/s0108768184002603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bayer G. Einfuehrung in die Kristallographieby W. Kleber. Acta Crystallogr A 1984. [DOI: 10.1107/s0108767384000994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Forman WB, Bayer G. A simplified method for monitoring heparin therapy at the bedside: the activated whole blood clotting time. Am J Hematol 1981; 11:277-81. [PMID: 7315841 DOI: 10.1002/ajh.2830110308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Twelve patients receiving heparin during hemodialysis had coagulation parameters monitored using the whole blood clotting time (WBCT), activated partial thromboplastin time (APTT), plasma heparin levels and activated whole blood clotting time (AWBCT). The AWBCT, performed with a battery-powered portable incubator/timer, correlated with both the corresponding WBCT and the plasma heparin levels. However, the correlation between the AWBCT and the APTT was quite poor. This assay is simply performed, inexpensive, and reproducible. It is recommended as an excellent method for monitoring heparin therapy.
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Bayer G, Hoffmann W, Siesler H. Characterization of deformation phenomena in polymers by rapid-scanning Fourier transform infra-red (FT i.r.) spectroscopy and mechanical measurements: 1. Orientation of isotactic polypropylene during uniaxial deformation. POLYMER 1980. [DOI: 10.1016/0032-3861(80)90068-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Bayer G, Wiedemann HG. Bildung und Stabilit�t von �gyptisch Blau (Cuprorivait). Naturwissenschaften 1975. [DOI: 10.1007/bf00608705] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Bayer G. Synthetic gem and allied crystal manufacture. VonD. Mac Innes. Noyes Data Corp., Park Ride/N. J. (USA)-London 1973. l. Aufl., IX, 221 S., 41, meist mehrteilige Abb. u. Tab., geb. $ 24.00. CHEM-ING-TECH 1974. [DOI: 10.1002/cite.330460825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wiedemann HG, Sturzenegger E, Bayer G, Wessicken R. Growth morphology of alumina whiskers. Naturwissenschaften 1974. [DOI: 10.1007/bf00596197] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bayer G. Abrasives. VonL. Coes, Jr. Vol. 1 d. Reihe: Applied Mineralogy. Herausgeg. v.H. A. Van Derck Fréchette, H. Kirsch, L. B. Sand u.F. Trojer. Springer-Verlag, Wien-New York 1971, 1. Aufl., VIII, 177 S., 51 Abb., 52 Tab., Ln. DM 51,-. CHEM-ING-TECH 1972. [DOI: 10.1002/cite.330440917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wiedemann HG, Bayer G. Investigation of minerals and of lunar samples (14163, 14258) by simultaneous thermal and X-ray analysis. Anal Bioanal Chem 1972. [DOI: 10.1007/bf00424066] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wiedemann HG, Bayer G. Thermal decomposition processes and their nucleation characteristics. ACTA ACUST UNITED AC 1972. [DOI: 10.1007/bf00423549] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Schulz H, Muchow G, Hoffmann W, Bayer G. X-ray study of mg-al silicate high-quartz phases. Z KRIST-CRYST MATER 1971. [DOI: 10.1524/zkri.1971.133.16.91] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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50
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Schulz H, Muchow GM, Hoffmann W, Bayer G. X-ray study of Mg-Al silicate high-quartz phases*. ACTA ACUST UNITED AC 1971. [DOI: 10.1524/zkri.1971.133.133.91] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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