J.Jpn. Surg. Soc.. 62(11): 1170-1187, 1961
STUDIES ON HEARTDYNAMICS DURING ANESTHESIA
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Department of Surgery, Chiba University (Chief: Prof. Komei NAKAYAMA) Fusaji WADA |
To konw complicate hemodynamic changes of patients during anesthesias, continuous examination must be required because the conventional direct methods can only test once or twice during anesthesias and the antagonistic reaction may be recorded. For this reason, the examination of heart dynamics by Holldack Blumberger's method is convenient as its simple technique, no ill effects to patients and repeated recordings are possible.
2. Spinal Anesthesia
Relative "Volume Reaction" developes generally between 5 to 15 minutes after spinal anesthesia, and changes to relative "Pressure Reaction" about 20 minutes later. Cardiovascular complications often develop at the stage of this change. When abnormal hypotension during spinal anesthesia is observed, abnormal "Pressure Reaction" follows. This "P-R" can be returned to "V-R" by intravenous infusions of a 5% glucose solution added ephedrine or Carnigen-Hoechst. Hypotension developes by spinal anesthesia is considered due to decreased blood filling of the left ventricle, so that intravenous infusion is absolutely indispensable and drugs which produce an increase of cardiac out-put, e.g., Carnigen-Hechst, is better choice than any other vasoconstrictive drugs.
3. Pentothal Sodium Anesthesia
There ia a consistent "P-R", even with the light anesthesia. Large dosage should be avoided, especially for the patients who have cardio-vascular diseases.
4. Ether Anesthesia
Consistent "P-R" is observed and more affected with the depth of narcosis increased, and on poor risk and much gases inhaled in short duration.
5. Ether Anesthesia Combined with Spinal Anesthesia
Abnormal "P-R" is observed when spinal anesthesia is performed on the patients who have the depth of stage 3, plane 1, with ether anesthesia. This reaction is remarkable in poor risk. Spinal anesthesia following ether anesthesia should be done under the early stage not deeper than the stage 3, plane 1.
(Author's abstract)
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