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Robotic assistance during thyroid surgery has been utilized clinically in Korea since late 2007. Robotic thyroidectomy has also been validated for surgical management of the thyroid gland. Compared with endoscopic thyroidectomy, the use of a robot in an endoscopic approach via the axilla provides a broader view of the thyroid bed, albeit from a lateral, as opposed to the conventional anterior, perspective. The wrist action of a surgical robot also provides a greater degree of movement than afforded by the use of simple endoscopic instruments, and tremor is eliminated.
Although several reports on operative outcomes of the robotic technique have appeared, no prospective trials comparing the clinical results of robotic with conventional open thyroidectomy have been described. We therefore designed a prospective trial comparing outcomes, including postoperative distress and patient satisfaction, between patients undergoing robotic and conventional open thyroidectomy.
Patient assessment A prospective study addressing perioperative outcomes and postoperative patient discomfort after thyroidectomy was commenced in April 2009 and is currently continuing. All patients were told about the operative techniques involved in conventional open and robotic thyroidectomy, and patients subsequently chose their preferred surgical procedure, voluntarily agreed to participate in our study, and provided written informed consent. The study protocol was approved by our Institutional Review Board.
Patients were included if they had (a) a minimally invasive follicular thyroid carcinoma ≤4 cm in diameter, or (b) a papillary thyroid carcinoma ≤2 cm in diameter. Exclusion criteria included (a) previous neck operations; (b) age <21 or >65 years; (c) prior vocal fold paralysis or a history of voice or laryngeal disease requiring therapy; (d) a malignancy with definite extrathyroid invasion, multiple lateral neck node metastasis, perinodal infiltration at a metastatic lymph node, or distant metastasis; and/or (e) a lesion located in the thyroid dorsal area (especially adjacent to the tracheoesophageal groove) caused by possible injury to the trachea, esophagus, or recurrent laryngeal nerve (RLN). The extent of thyroid resection was determined for each patient using American Thyroid Association guidelines. All patients underwent prophylactic ipsilateral central compartment node dissection (CCND; pretracheal, prelaryngeal, and paraesophageal).
Surgical outcomes Surgical outcomes included operating time, intraoperative blood loss, number of retrieved central lymph nodes, length of hospital stay, and postoperative complications. We also assessed the incidence of postoperative seromas and hematomas for at least 3 weeks postoperatively. Operating time was defined as the interval from skin incision to closure. The drainage extent was measured over 24 h, and a drain was removed if drainage was <30 mL in this interval. Study patients were discharged the day after drain removal.
Mobility of the vocal cords was assessed by videostrobolaryngoscopic examination, performed both preoperatively and 1 week and 3 months postoperatively. Vocal cord palsy was defined as permanent when there was no evidence of recovery within 6 months.
Postoperative pain and cosmetic outcomes To evaluate the degree of postoperative pain, all patients were given analgesics on an identical protocol. Patients were asked to grade postoperative pain in the neck and anterior chest as none, very slight, slight, moderate, or severe, 24 h after surgery.
At 1 week and 3 months after surgery, patients were asked (by questionnaire) to evaluate the presence of hyperesthesia and paresthesia in the neck and anterior chest, as well as shoulder discomfort. All patients answered and returned completed questionnaires.
Cosmetic results, including wound appearance and complaints, were evaluated by patients 3 months after surgery using a verbal response scale with five possible responses: extremely satisfied, excellent, acceptable, dissatisfied, and extremely dissatisfied.
Subjective voice and swallowing evaluation We used the Voice Handicap Index-10 (VHI-10), a validated, reliable self-assessment tool that measures patient assessment of voice quality and the effect of voice on quality-of-life, to determine the frequency of voice abnormalities. The VHI-10 consists of 10 questions, responses to each of which are scaled from a minimum of 0 (no voice alteration) to a maximum of 40 (highest voice impairment).
Swallowing difficulties were assessed using the Swallowing Impairment Index (SIS-6), a self-administered, six-item assessment of symptoms related to dysphagia that has been validated for diagnosis of impairment. The scoring of each item on the SIS-6 ranges from a minimum of 0 (no swallowing alteration) to a maximum of 24 (highest swallowing impairment). The SIS-6 score is also excellent for assessing non-voice throat symptoms, including cough, choking, and throat-clearing, all of which occur after thyroidectomy. All patients enrolled in this study completed the VHI-10 and SIS-6 questionnaires before surgery and at 1 week and 3 months after surgery.
Observational Model: Case Control, Time Perspective: Prospective
Ajou University Medical Center, Department of Surgery
Korea, Republic of
Active, not recruiting
Korean Association of Endocrine Surgeons
Published on BioPortfolio: 2014-07-23T21:10:00-0400
Patients underwent thyroidectomy filled an computer or paper based QoL questionnaire before and after operation.
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Surgical removal of the thyroid gland. (Dorland, 28th ed)
An inorganic compound that is used as a source of iodine in thyrotoxic crisis and in the preparation of thyrotoxic patients for thyroidectomy. (From Dorland, 27th ed)
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