Key result
Radioisotope penography using 99mTc-labeled autologous red blood cells showed that intrapenial blood volume increased by a mean of 8.0 times during complete erection after visual sexual stimulation.
Why the study?
Does radioisotope penography using 99mTc-labeled autologous red blood cells accurately quantify intrapenial blood volume changes during visual sexual stimulation in impotent patients?
Observational (n=17)
No
Does radioisotope penography using 99mTc-labeled autologous red blood cells accurately quantify intrapenial blood volume changes during visual sexual stimulation in impotent patients?
Radioisotope penography using 99mTc-labeled autologous red blood cells can quantitatively measure intrapenial blood volume changes during erection, potentially aiding in distinguishing organic from functional impotence.
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May support quantitative penile volume assessment in select cases; hypothesis-generating and should not yet change impotence evaluation practice.
Shirai et al. (1976) conducted an observational in Impotence (n=17). 99mTc-labeled autologous red blood cells and visual sexual stimulation vs. Baseline (before visual sexual stimulation) was evaluated on Increase in intrapenial blood volume after visual sexual stimulation. Radioisotope penography using 99mTc-labeled autologous red blood cells showed that intrapenial blood volume increased by a mean of 8.0 times during complete erection after visual sexual stimulation.
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