The goal of this study is to assess the efficacy of continuous local anesthetic wound infusion to improve quality of recovery following ablative surgery and neck dissection.

Bilateral cervical plexus catheters are convenient and safe to place under the direct vision of the surgeons during ablative and neck dissection. The investigators hypothesize that continuous local anesthetic wound infusion to block bilateral cervical plexus will improve quality of recovery following ablative surgery and neck dissection. The primary endpoint is the quality of recovery, which will be assessed using the 15-item quality of recovery questionnaire (QoR-15). Secondary endpoints include numeric pain scale, number and proportion of patients on salvage analgesics, Incidence of phrenic nerve block, Incidence of recurrent laryngeal nerve block, length of post-anesthesia care unit (PACU) stay, length of post-operative hospital stay.

Inclusion Criteria:

• Over age 18;
• patients with head and neck cancer Undergoing ablative surgery and neck dissection.

Exclusion Criteria:

• Patient refuse;
• Relatively contraindications: severe heart, liver, or kidney dysfunction, coagulation dysfunction, and local anesthetic allergy history;
• Intervention unlikely to be effective: drug abuse history, receiving other types of nerve block treatment;
• Unlikely to complete the follow-up: alcoholism, planned to replace WeChat and phone within three months; the expected life span less than three months;
• Unable to cooperate with the questionnaire and use the patient-controlled analgesia pump.

Participants, clinicians, data collectors, outcome adjudicators and data analysts will not have access to details of group assignment.