On the study of the hand for indications of local and general disease / by Edward Blake.
- Blake, Edward T. (Edward Thomas), 1842-1905.
- Date:
- 1899
Licence: Public Domain Mark
Credit: On the study of the hand for indications of local and general disease / by Edward Blake. Source: Wellcome Collection.
138/198
![be carried out in the lying posture and for a very short time. The arms should on no account be raised above the head. These performances should not be done after general exercise nor after a full meal. With these precautions, they form a most valuable adjunct to the Nauheim methods. Other Methods of Modifying the Arterial Calibre. A very great variety of agents possess the power of changing the size of the arteries. To Dr. George Oliver, of Harrogate, belongs the credit of investigating these etiological factors in a scientific manner, and of deter- mining their relative value as clinical agents, see chapter 2, Pulse Gauging. [Lewis, 1895.] For example. Dr. Oliver finds that the radial calibre is augmented by— External warmth, Exertion, Effleurage, Tapotement, Digestion whilst lying; is diminished by— External cold, External heat, Petrissage, Digestion if sitting, The dependent posture. It is not generally recognised that whilst a hot bath shrinks the arteries just as a cold one does, a warm one dilates them, and a tepid immersion leaves them unchanged. Some would be surprised to learn that the radial artery may be doubled in size, that is to say, its diameter may be increased from 13 mm. to 2 0 mm. by raising the temperature of a bath 60 degrees, that is, from 40 degrees F. to 100 degrees F.](https://iiif.wellcomecollection.org/image/b20393908_0158.jp2/full/800%2C/0/default.jpg)
