A laboratory guide in physiology / by Winfield S. Hall ; with appendices on organization and equipment.

  • Hall, Winfield Scott, 1861-1942.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A laboratory guide in physiology / by Winfield S. Hall ; with appendices on organization and equipment. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    tion through the agency of a clamp and support; some- times, however, better results may be secured by holding the stethograph in the hands, supporting the wrists on the edge of the rabbit board. b. Intrathoracic pressure. Locate an intercostal space to the right of the ster- num and opposite its middle point. Make an incision 0. 5 cm. long, parallel with the intercostal space and 1 cm. from the sternum. Dissect through the intercostal mus- cies, taking care not to cut the pleura. Insert the point of the glass cannula into the wound, press it carefully through the pleura into the right pleural cavity. Join the rubber tube to a recording tambour and un- clamp. Slowly and gently manipulate the cannula until there is evident communication through the lumen of the cannula and tube from the pleural cavity to the tambour. So adjust the cannula that the recording lever makes the maximum excursion. Bring the levers into such a relation to the kymograph that the tracing point of the stethograph lever shall be vertically over that of the lever which is to record intra-thoracic pressure, and about two centimeters from it. c. Intra=abdominaI pressure. Make, in the median line of the abdomen, a one-cen- timenter incision, limited anteriorly by the xiphoid ap- pendix. After partially dissecting through the abdom- inal wall insert the cannula into the incision and care- fully press it through the peritoneum. If one push the cannula between the diaphragm and liver he will usually be successful in getting the free end of the can- nula into an open space. Care should be taken not to wound the liver. Take tracing as in b. 4. Observations. a. Exierfial respiratory movements.