The dyspnoea of asthma & bronchitis : its causation, and the influence of nitrites upon it / by Thomas R. Fraser.

  • Fraser Thomas R. (Thomas Richard), Sir, 1841-1920.
Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: The dyspnoea of asthma & bronchitis : its causation, and the influence of nitrites upon it / by Thomas R. Fraser. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    13/46
    To illustrate more clearly the relationship between the effects on the asthma and on the circulation, I would refer to the pulse- tracings taken frequently during the observations (Figs. 1 to 12). They show, in a very remarkable manner, a coincidence between the fall of blood tension and the cessation of the dyspncea and auscultatory phenomena, and also between the return to the original state of the blood tension and the reappearance of the dyspnoea and auscultatory phenomena. As the lowered blood tension is accompanied with acceleration of the heart’s contrac- tions, it can only be accounted for by the dilatation of bloodvessels. Fia. 1.—Before first inhalation. Pulse 100, respirations 28 per minute. Breathing much embarrassed, rales abundant. Nitrite op Amyl Inhaled during nearly Two Minutes. Fio. 2.—Two minutes after inhalation commenced. Pulse 120 per minute. Breathing quite easy. No rales. ■JWVK/VJVNV Fio. 3.—One minute after inhalation ceased. Pulse 96 per minute. Breathing slightly embarrassed. Rilles occasionally heard. Fio 4 —Seven minutes after inhalation ceased. Pulse 96, respirations 28 per minute. Breath- ing embarrassed. Rales nearly continuous. Secokd of NmuTE of A»vl dofiko Two Minute., beoun Nine Minutes after the First Inhalation cease . bUVllMli Fio 6.—Fifty seconds after second inhalation commenced. Pulse 122, respirations 80 per minute. Breathing perfectly easy. No rales. minute. Breathing eiubarrasscd. KUR8 more frequent. 'o~. rales. 1.MO. n