Anesthesia Induction for Thyroidectomy

Pre-induction Considerations

Thorough airway assessment is essential before thyroidectomy, including evaluation of neck mobility, mouth opening, thyromental distance, and any signs of tracheal deviation or compression, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 2, 3
Communicate with the surgical team preoperatively about any special monitoring requirements, particularly if recurrent laryngeal nerve monitoring will be used, as this will affect choice of muscle relaxants, according to the American Academy of Otolaryngology-Head and Neck Surgery 2
If nerve monitoring is planned, long-acting paralytic agents are absolutely contraindicated, as stated by the American Academy of Otolaryngology-Head and Neck Surgery 2
Position the patient supine with neck extended to ensure optimal exposure, as suggested by the International Journal of Surgery 4

Short-acting muscle relaxant (if nerve monitoring is not planned) to facilitate intubation, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 2

Apply cricoid pressure during induction to reduce aspiration risk, as recommended by the American Society of Anesthesiologists 1
Routine use of an intubating bougie is recommended to optimize first-pass intubation success, according to the American Society of Anesthesiologists 1
Consider videolaryngoscopy for first intubation attempt, especially if any predictors of difficult airway are present, as suggested by the American Society of Anesthesiologists 3, 5
Limit tracheal intubation attempts to three, with optimization between attempts, as recommended by the American Society of Anesthesiologists 1
Confirm correct tube placement with clinical assessment and waveform capnography, as stated by the American Society of Anesthesiologists 1

Accurate endotracheal tube placement is critical when nerve monitoring is used; improper electrode placement can lead to false monitoring security, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 2
Have difficult airway equipment readily available, as thyroid pathology may cause tracheal deviation or compression, according to the American Academy of Otolaryngology-Head and Neck Surgery and the American Society of Anesthesiologists 2, 6
Consider administering dexamethasone (0.15-1.0 mg/kg, maximum 8-25 mg) to reduce post-operative laryngeal edema, as suggested by other medical guidelines 7
Prepare for potential post-operative complications, particularly neck hematoma, which can cause rapid airway compromise, as warned by the American Society of Anesthesiologists 6, 8

Be vigilant for signs of post-thyroidectomy hematoma (DESATS: difficulty swallowing/discomfort, elevated early warning score, swelling, anxiety, tachypnea/difficulty breathing, stridor) and manage accordingly, as recommended by the American Society of Anesthesiologists 9
Have emergency front-of-neck airway equipment immediately available in case of post-operative airway compromise, as advised by the American Society of Anesthesiologists 6, 8
If hematoma with airway compromise occurs, follow the SCOOP approach: skin exposure, cut sutures, open skin, open muscles, pack wound, as suggested by the American Society of Anesthesiologists 5, 8
Monitor for recurrent laryngeal nerve injury, which may manifest as voice changes post-operatively, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 2

Avoid long-acting neuromuscular blocking agents if nerve monitoring is planned, as this will interfere with monitoring accuracy, as warned by the American Academy of Otolaryngology-Head and Neck Surgery 2
Do not remove cricoid pressure prematurely, but be prepared to release it if laryngoscopic view is difficult, as recommended by the American Society of Anesthesiologists 1
Avoid excessive neck manipulation during intubation to prevent disruption of thyroid pathology, as advised by the American Academy of Otolaryngology-Head and Neck Surgery 2
Be cautious with endotracheal tube cuff pressure, as placement adjacent to the recurrent laryngeal nerve may cause temporary voice dysfunction, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 2