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Spinal anesthesia and electroerection in dogs and monkeys
S C Mueller1, S Aboseif, M R Fahey
1Department of Urology, University of California School of Medicine, San Francisco 94143.
The Journal of Urology
|July 1, 1989
Summary
Spinal anesthesia enhanced penile erectile response in monkeys but not dogs during cavernous nerve stimulation. This suggests anesthesia may alter autonomic control of erectile function differently across species.
Area of Science:
- Neuroscience
- Urology
- Anesthesiology
Background:
- Penile erectile response is regulated by complex autonomic mechanisms.
- Spinal anesthesia is known to affect autonomic functions, potentially influencing erectile responses.
Purpose of the Study:
- To investigate the effect of spinal anesthesia on penile erectile response to cavernous nerve electrostimulation in animal models.
- To compare the impact of spinal anesthesia on erectile function in simian and canine subjects.
Main Methods:
- Cavernous nerve electrostimulation was performed in monkeys and dogs before and during spinal anesthesia (xylocaine or tetracaine).
- Physiological parameters including blood pressure, penile tumescence, and intracavernous pressure were monitored.
- Erectile response duration and characteristics were analyzed.
Main Results:
- In monkeys, spinal anesthesia led to a decrease in systolic blood pressure and enhanced erectile response duration and detumescence phases.
- In dogs, spinal anesthesia also caused a blood pressure decrease, but the erectile response to electrostimulation was variable and sometimes abolished by positional changes.
- No consistent enhancement or impairment of erectile response due to spinal anesthesia was observed in dogs.
Conclusions:
- Spinal anesthesia appears to enhance the erectile response to cavernous nerve stimulation in monkeys.
- The effect of spinal anesthesia on erectile response in dogs is inconsistent and potentially influenced by other factors.
- Autonomic regulatory mechanisms may be differentially affected by spinal anesthesia in simian versus canine species, impacting erectile function.