The amount of compensatory sweating depends on the patient, the damage that the white rami communicans incurs, and the amount of cell body reorganization in the spinal cord after surgery.
Other potential complications include inadequate resection of the ganglia, gustatory sweating, pneumothorax, cardiac dysfunction, post-operative pain, and finally Horner’s syndrome secondary to resection of the stellate ganglion.
www.ubcmj.com/pdf/ubcmj_2_1_2010_24-29.pdf

After severing the cervical sympathetic trunk, the cells of the cervical sympathetic ganglion undergo transneuronic degeneration
After severing the sympathetic trunk, the cells of its origin undergo complete disintegration within a year.
http://onlinelibrary.wiley.com/doi/10.1111/j.1439-0442.1967.tb00255.x/abstract

Friday, February 3, 2012

"I think the surgeons may not be aware of the long term consequences of denervation"

Email response from Dr. Ahmet Hoke of  John Hopkins School of Medicine,  School of Neurology - Specifically I asked him his opinion on three things:

1. What was his opinion of ETS in terms of risks vs benefits
2. His opinion on why Thoracic surgeons would advertise a surgical reversal approach when, as he sees it, it would  have a very low probability of success
3. His opinion on the Davinci Robot Reversal article regarding surgical reattachment of the sympathetic nerves

1. It all depends on the risk benefit analysis, for some patients yes it may make sense as not everyone develops as severe side effects.
2. I think the surgeons may not be aware of the long term consequences of denervation.

The paper you refer to is not a good model of what happens to the patients because they cut the nerve and immediately repaired it. In such immediate repairs, the ganglia does not loose it's neurons and can regenerate. A better model would be to cut the nerves, wait 6 months and then do the repair; I suspect the recovery would be a lot less.
Ahmet Hoke M.D., Ph.D. FRCPC
Professor of Neurology and Neuroscience
Director, Neuromuscular Division
Johns Hopkins School of Medicine
Department of Neurology
855 N. Wolfe St., Neurology 248
Baltimore, MD, 21205
USA

diabetic autonomic neuropathy has already sympathectomized the patient

This diabetic syndrome has been attributed to a lesion of the sympathetic nerve fibres which control sweat secretion [11] and follow the course of the peripheral nerves [12]. This affects the efferent branch of the reflex arch and is identical to that occurring distal to a surgical sympathectomy [13].

There was no difference found between the histological changes in the nerves of the spontaneous anhidrotic patients
(Fig. 1) and those of the two previously sympathectomized patients.

A number of papers have been published which stressed [22-24] the high failure rate of sympathectomy operations in diabetics. We believe that the failure of the operation is due to the fact that diabetic autonomic neuropathy has already sympathectomized the patient. The results of the present study are compatible with this idea.
http://www.springerlink.com/content/v21h52461037653k/
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