File Details
- Depositor
- Karen Dykes
- Date Uploaded
- 2021-12-08
- Date Modified
- 2021-12-08
- Fixity Check
- passed on August 08, 2024 at 14:06
- Characterization
-
Height: 855
Width: 657
File Format: tiff (Tagged Image File Format)
File Size: 1240130
Filename: 8279_img_121.tiff
Last Modified: 2024-08-09T00:54:00.721Z
Original Checksum: 1093578a02f9d67ae6dcbf96581f1a9f
Mime Type: image/tiff
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| Transcript |
- in man explained by Dr J [Sir John] McMichael. of the
London School of Medical Postgraduate Studies. He
described the old method of calculation by filling
the ventricle with molten wax + measuring this
volume as the amount of blood delivered at
one beat. A new method made possible by
a German Dr Forstman [Werner Theodor Otto Forssmann) who conceived the idea
of introducing a flexible canula via the
veins into his [word crossed out] the right ventricle +
did the experiment 9 times on his own body
using the saphenous vein + the brachial
veins. He reported no harm + no discomfort.
Using this technique samples of true arterial
+ true venous blood are withdrawn. Each is
exposed to O2 [oxygen] + the uptake to saturation
measured. the difference represents the amt [amount] of
O2 [oxygen] withdrawn from the lungs at each
passage. The O2 [oxygen] consumption of the lungs
per minute is cal [word crossed out] measured + from
these data the cardiac delivery is calculated
as about 6.6 litres per minute. Another
technique uses a dye injected venously
+ serial blood samples collected
at intervals of a second in vials place in a
revolving rack were used to establish a
curve of dye dilution, using which the
mean can be calculated + the rate of
discharge arrived at. The two methods
give closely similar results.
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