Can a tiny electric zing prevent opioid breathing trouble?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Males and females at least 18 years old * Adults undergoing an elective (General, Plastics, Urology, Gynecologic Oncology, Vascular, Otolaryngology, Transplant) surgery with general anesthesia who are recovering in the PACU * American Society of Anesthesiologists (ASA) grade I-IV * Scheduled to be seen at the Pre-Admission Clinic or Surgery Inpatient Unit * Able to complete questionnaires with or without assistance * Able to understand the study protocol, its requirements, risks, and discomforts * Able to provide written informed consent Exclusion Criteria: * A) Preoperative exclusion criteria: * American Society of Anesthesiologists (ASA) grade V-VI * Urgent or emergent surgical procedures that there is insufficient time prior to anticipated commencement of the procedure for participation in the study * Patients with implantable medical electronic devices (eg, pacemaker, implantable cardioverter defibrillator, catheter, and so on.) * Patients with febrile illnesses or acute infectious diseases * Pregnancy * Epilepsy. * B) Postoperative exclusion criteria: * Surgery that would preclude the use of a nasal cannula or face mask used for capnography monitoring (e.g., facial reconstruction) * Postoperative mental status precludes application of study equipment, including a nasal cannula/face mask and/or the stimulation pads (e.g., delirium or agitation during recovering from anesthesia, repeated removal of cannula) * Postoperative admission to the ICU or any site other than the PACU * Need for postoperative assisted ventilation via an endotracheal tube or tracheostomy * An abnormal respiratory tract identified during or immediately after surgery can lead to severe respiratory obstruction * Patients with cardiac arrhythmia (history of atrial fibrillation or bundle branch block) * Skin conditions such as open sores preventing proper application of electrodes * Presence of metal implants in both arms * Lack of access to upper extremities following surgery for application of the stimulation pads