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The Toxaemias of Pregnancy

III. The Respiratory Metabolism

Two Figures

Evans Memorial, Massachusetts Memorial Hospitals, Boston

Somewhat elaborate study of a group of fifty pregnant women with some form of the toxaemias of pregnancy, observed both before and after delivery, has yielded the following tentative conclusions:

1. The toxic cases exhibit an obesity that persists after delivery.

2. The weight of the children born at term does not depart significantly from those resulting from normal pregnancy. This same generalization seemingly holds true for the premature births as compared with normal values computed from reliable sources.

3. The lung volumes of the toxic do not depart significantly from those defined as normal for the pregnant state.

4. The respiratory metabolism of the toxic patient is, generally speaking, well within the range of that determined for the course of normal pregnancy. Departures from this are few in number and are to be traced to superimposed effects not demonstrably associated with the toxic status.

5. Alveolar carbon dioxide tensions, while depressed, do not reach the low levels recorded in normal pregnancy.

6. Blood pressures, pulse rates and body temperatures all show concrete changes from the normal traceable to the toxic condition. Recovery to normal levels after delivery is delayed.