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  • 1
    Electronic Resource
    Electronic Resource
    Inhalative Noxen: Schwefeldioxyd (1974)
    Springer
    Lung 150 (1974), S. 83-96 
    Details
    ISSN: 1432-1750
    Keywords: Exposure to SO2 ; Airway Resistance ; Time-Concentration Curve ; Obstructive Bronchitis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Anhand eigener Ergebnisse und anhand der Literaturangaben werden verschiedene Bereiche der SO2-Belastung von Tier und Mensch beschrieben. Bei geringen Konzentrationen in Bereichen der MIK-Werte kann es zu einer Steigerung der Empfindlichkeit des Bronchialsystems kommen. Der Organismus verfügt über Adaptationsmechanismen. Wahrscheinlich spielen Konzentrationsänderungen pro Zeiteinheit eine größere Rolle als die absoluten Konzentrationen. Höhere Konzentrationen können das Krankheitsbild der chronisch obstruktiven Bronchitis verursachen. Probanden, welche SO2 gegenüber am Arbeitsplatz exponiert sind, sollten mit ihrer Reagibilität des Bronchialsystems überwacht werden.
    Notes: Abstract SO2 shows different reactions on the lung and on the bronchial tree, depending on concentration and on duration of exposure. Low concentration can increase the sensitivity of the bronchial receptors, higher concentrations can directly increase the airway resistance. This reaction depends also on other particles inhaled at the same time. Coal dust (8 mg/m3) has no influence on the SO2 effect. Higher concentrations can cause chronic obstructive bronchitis, as could be shown in dogs. Persons exposed to SO2 at work should be checked for the reaction of their bronchial systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179305
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  • 2
    Electronic Resource
    Electronic Resource
    Lungenfunktion bei Spannungsverlust der Lunge (1974)
    Springer
    Lung 151 (1974), S. 73-86 
    Details
    ISSN: 1432-1750
    Keywords: Lung Tension ; Pneumothorax ; Airway Resistance ; Sensitivity of the Bronchial System ; Blockade of the N. Vagus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Entspannung der Lunge im Hundeversuch durch Pneumothorax und im Versuch an jungen und älteren Versuchspersonen durch Thoraxbandage führt zu einer Steigerung der Empfindlichkeit des Bronchialsystems im ACH-Test. Die nach Lungenentspannung unter Acetylcholin-Inhalation verstärkte bronchokonstriktorische Reaktion läßt sich durch direkte Vagusblockade (Hundeversuche) wie durch Atropininhalation (Menschen) verhindern. Es wird angenommen, daß die Lungenentspannung die Bronchialmuskulatur in einen Zustand bringt, welcher den von sensorischen Receptoren ausgehenden, über den Nervus vagus als Reflex laufenden bronchokonstriktorischen Reiz stärker beantworten läßt. Auf verschiedene Formen von „überempfindlichem Bronchialsystem“ wird hingewiesen. Die entsprechenden Meßwerte für Atemminutenvolumen, Atemtiefe und Atemfrequenz wie für die arteriellen Blutgase werden mitgeteilt.
    Notes: Abstract Decrease of lung tension increases the sensitivity of the bronchial system to acetylcholine inhalation. A decrease in lung tension was achieved by pneumothorax in dogs and with a thorax bandage in human subjects. The increase of airway resistance to acetylcholine inhalation following the decrease in lung tension was understood as a change of the effectiveness of the bronchial muscles on airway resistance. Acetylcholine works via sensoric receptors through the N. vagi on the bronchial muscles. Blockade of the N. vagi prevented an increase of sensitivity in the bronchial system. Measurements and results of breathing-volume per minute, breathing frequency, and blood gases are also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101145
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  • 3
    Electronic Resource
    Electronic Resource
    Antigen-induced hypersensitivity of the bronchial system and the influence of disodium cromoglycate (1976)
    Springer
    Lung 153 (1976), S. 95-103 
    Details
    ISSN: 1432-1750
    Keywords: Allergen ; Disodium Cromoglycate ; Airway Resistance ; Acetylcholine ; Histamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Respiratory hypersensitivity to ascaris extract aerosol and the potentation of airway resistance increase caused by acetylcholine and histamine challenge produced by this allergen exposition were carried out on four dogs. The effect of disodium cromoglycate on these reactions was also studied. All animals presented significant respiratory distress with ascaris extract aerosol, which could be avoided by previous exposure to disodium cromoglycate aerosol. The increased response of the bronchial system to acetylcholine and histamine, observed after allergen aerosol, could not be abolished by disodium cromoglycate aerosol.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02091430
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  • 4
    Electronic Resource
    Electronic Resource
    Local release of histamine, prostaglandin F2α and thromboxane B2 into the tracheal lumen and its influence on airways reactivity (1984)
    Springer
    Journal of molecular medicine 62 (1984), S. 315-322 
    Details
    ISSN: 1432-1440
    Keywords: Histamine ; Prostaglandin F2α ; Thromboxane B2 ; Mediator release ; Airways reactivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of tracheal lavage with ascaris extract (AE) on airway response to acetylcholine (ACH) and histamine (Hi) was investigated in a series of 24 dogs. AE administered to a restricted area of the trachea resulted in a release of various mediators such as Hi, prostaglandin F2α (PGF2α, measured as the metabolite 15-keto-13, 14-dihydro-PGF2α) and thromboxane B2 (TXB2) into the tracheal lumen. This differed from H2O administration which resulted in no increased release of these mediators. The relatively small concentrations of these substances measured in arterial plasma argue for the role of these mediators on a local basis. On the other hand, tracheal lavage with allergen induced changes in airway response to ACH and Hi aerosols which was not observed after tracheal lavage with water. An interaction between this allergen-induced mediator release into the trachea and peripheral airways reactivity could be demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01716448
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of exogenous and endogenous histamine on the respiratory system (1982)
    Springer
    Journal of molecular medicine 60 (1982), S. 991-996 
    Details
    ISSN: 1432-1440
    Keywords: Histamine ; Obstructive air way disease (OAD) ; Oversensitive bronchial system ; Histamine receptors ; Histamin ; Bronchokonstriktion ; überempfindliches Bronchialsystem ; Histamin-Rezeptoren
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es besteht eine statistisch strenge Korrelation zwischen dem Anstieg der Histaminkonzentration im arteriellen Plasma und dem Anstieg der Strömungswiderstände in den Atemwegen bei experimentell verursachter allergischer Atemwegsobstruktion. Das Histamin wird an sensorischen Rezeptoren im Sinne einer Reflexbronchokonstriktion wirksam. Histamin verursacht in geringen Konzentrationen im Bronchialsystem eine unspezifische Empfindlichkeitssteigerung. Diese kann auch durch Allergene in sehr geringer Konzentration hervorgerufen werden. Patienten mit chronisch obstruktiver Bronchitis haben hohe Histamin-Konzentrationen im Sputum. Durch Waschungen der inneren Oberfläche des Bronchialbaums lassen sich hohe Histamin-Konzentrationen in der Spülflüssigkeit nachweisen. Die Gabe gleicher Histamin-Konzentrationen intravenös verursacht Bronchokonstriktion. Es ist anzunehmen, daß Histamin-Rezeptoren nahe der Oberfläche der Bronchialschleimhaut vorhanden sind. Ebenso müssen in der Oberfläche oder auf der Oberfläche der Bronchialschleimhaut Mastzellen vorhanden sein.
    Notes: Summary There is a statistically strong correlation between the increase of the histamine concentration in the arterial plasma and the increase of airway resistance. The histamine causes a reflex bronchoconstriction on the sensory receptors. Histamine in low concentration increases the unspecific reaction in the bronchial system. This can also be achieved using low concentrations of allergen aerosols. Patients with chronic obstructive bronchitis show high concentrations of histamine in the sputum. The bronchoconstrictive potency of this histamine was found to be not always active. Higher concentrations of histamine can be liberated by washing the inner surface of the bronchial tree. Histamine injected in similar concentrations as that measured in the sputum causes bronchoconstriction. There should be high concentrations of histamine receptors as well as mast cells near the surface of the mucosa of the bronchial wall. There are many questions remaining open, which will be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01716960
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  • 6
    Electronic Resource
    Electronic Resource
    Histamine release into cracheal lumen and bronchial reactivity (1983)
    Springer
    Research in experimental medicine 182 (1983), S. 167-175 
    Details
    ISSN: 1433-8580
    Keywords: Tracheal lavage ; Pronase ; Acetylcholine ; Histamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of tracheal lavage in a restricted area, with a proteolytic enzyme (Pronase) on the bronchial response to challenge with ACH and AE was studied in 15 dogs. Histamine concentrations measured in the tracheal liquid after lavage with Pronase were smaller than the values after tracheal lavage with allergen. Airway response to ACH inhalation was significantly increased after tracheal lavage with Pronase. Effects of proteolytic enzymes and allergens on the tracheal wall are compared. Allergens and proteolytic enzymes evidence a different mode of action in increasing reactivity of peripheral airways.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851122
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  • 7
    Electronic Resource
    Electronic Resource
    Role of vagus nerves and inhalative aerosols of acetylcholine and histamine on dynamic pulmonary elastance in anesthetized spontaneously breathing and artificially ventilated dog (1982)
    Springer
    Research in experimental medicine 181 (1982), S. 155-170 
    Details
    ISSN: 1433-8580
    Keywords: Vagus ; Bronchoconstriction ; Acetylcholine ; Histamine ; Artificial ventilation ; Spontaneous breathing
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The role of the vagus nerves on resting respiratory resistance (R1) and dynamic lung elastance (Edyn) and the mechanism of action of inhaled aerosol of histamine (Hist) and acetylcholine (ACH) were studied in anesthetized spontaneously breathing and artificially ventilated dogs. Observations were also extended to study the effect of electrical stimuli to cut ends of both vagi alone and during inhalation of aerosols. Bilateral cervical vagal blockade by local application of novocaine solution (2.5%) or bilateral vagotomy reduced resting R1 and Edyn and prevented increase of these parameters following inhalation of aerosols of Hist or ACH in spontaneously breathing dogs. However, the similar vagal blockade or vagotomy in artificially ventilated animals showed neither an influence on resting R1 and Edyn nor could it prevent their increase following the exposure to aerosol of Hist or ACH. Electrical stimuli to the peripheral cut ends of vagi induced slight increase in R1 and Edyn, but the effect on heart rate and systemic blood pressure was very strong. The combined effects of aerosol of Hist or ACH and electrical stimuli were additive. It is concluded that inhalation of aerosol of Hist or ACH produced two kinds of effects on respiration: (1) Increased respiratory rates with reduced tidal volume and with bronchoconstriction which were vagusdependent (spontaneous breathing model), and (2) bronchoconstriction which was a direct response of smooth muscle without involving a reflex (artificial ventilation model).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851186
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  • 8
    Electronic Resource
    Electronic Resource
    The role of vagus nerve on histamine- and acetylcholine-induced bronchoconstriction (experiments on cats) (1986)
    Springer
    Research in experimental medicine 186 (1986), S. 29-34 
    Details
    ISSN: 1433-8580
    Keywords: Bronchoconstriction ; Direct action on bronchial muscle ; Histamine ; Acetylcholine ; Vagotomy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary During administration of highly concentrated acetyclcholine and histamine aerosol (20–40 min), different effects on tidal volume, respiratory rate, and bronchial tone could be demonstrated. Inhalation after vagotomy neither showed changes in respiratory rate nor in tidal volume. These results point out the importance of the nervus vagus in case of bronchoconstriction caused by mediators. It is discussed to which degree vagus activity is required for the direct effect of different mediators in living animals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851831
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  • 9
    Electronic Resource
    Electronic Resource
    Histamine release into tracheal lumen and bronchial reactivity (1983)
    Springer
    Research in experimental medicine 183 (1983), S. 67-75 
    Details
    ISSN: 1433-8580
    Keywords: Histamine ; Bronchospastic response ; Acetylcholine ; Tracheal lavage
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of tracheal lavage with histamine, and of i.v. administration of histamine on bronchospastic response was studied in 16 dogs. Airway response to acetylcholine inhalation was significantly increased after tracheal lavage with high concentrated histamine solution (1%). No influence on airway response was found after (1) tracheal lavage with lower concentrations of histamine and (2) its i.v. administration. The clinical importance of these manifestations is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01851764
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