“…Two studies involved cardiac procedures (myocardial revascularizations, aortic and valve replacements, myxoma resections, atrial septal defect corrections, and CABG) (26,31). Six studies involved different thoracotomy approaches for lung cancer and lung nodule resection, pleural effusions, mediastinal adenopathy, emphysema, and pleural thickening (15,27–30,32). In each study, the addition of TENS was compared to pharmacological therapy alone.…”