It is well established that interruption of the sympathetic fibers to the upper or lower extremities in man brings about an increase in the circulation of blood to the respective parts. It has been assumed that the same result will be obtained if the sympathetic supply to the choroidal vessels is interrupted. This theory has been applied in cases of retinitis pigmentosa. However, removal of the superior cervical sympathetic ganglions has not given the anticipated results. A more recent application of surgery to the sympathetic nervous system is resection of the splanchnic nerves and the lower dorsal sympathetic chain for hypertension. From an ophthalmologic as well as from a general medical point of view the results in some cases have been surprising.
Various methods have been tried in different clinics to reduce high blood pressure permanently. These have included operations directed to the adrenal gland as the chief
FRALICK FB, PEET MM. HYPERTENSIVE FUNDUS OCULI AFTER RESECTION OF THE SPLANCHNIC SYMPATHETIC NERVESA PRELIMINARY REPORT. Arch Ophthalmol. 1936;15(5):840–846. doi:10.1001/archopht.1936.00840170052006
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