A small insignificant pneumothorax can be expected after ETS in about 75% of cases [15], which gets spontaneously absorbed, usually within 24 h.
Comparing T2 and T2–T3 ablation in thoracoscopic sympathectomy for palmar hyperhidrosis: a randomized control trial
A. N. Katara, J. P. Domino, W.-K. Cheah, J. B. So, C. Ning, D. Lomanto
Received: 13 October 2006/Accepted: 2 November 2006
Surg Endosc (2007) DOI: 10.1007/s00464-007-9241-9
[15] Ojimba TA, Cameron AEP (2004) Drawbacks of endoscopic thoracic sympathectomy. Br J Surg 91: 264–269
Permanent side effects included compensatory sweating in 67.4%, gustatory sweating in 50.7% and Horner's trias in 2.5%. However, patient satisfaction declined over time, although only 1.5% recurred. This left only 66.7% satisfied, and a 26.7% partially satisfied. Compensatory and gustatory sweating were the most frequently stated reasons for dissatisfaction. Individuals operated for axillary hyperhidrosis without palmar involvement were significantly less satisfied (33.3% and 46.2%, respectively).
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1234291/