This is a prospective randomized trial evaluating the effect of SCPB on reported patient pain following IJCL placement as compared to local infiltrate.

The goal of this study is to determine if SCPBs provide more pain control than local infiltrate of anesthetic for internal jugular venous cannulation. The investigators hypothesis that patients who receive the SCPB will have a lower VAS rating on average than those who receive local infiltration following internal jugular venous cannulation. To test this, the investigators will be approaching eligible patients for inclusion in a research study. If the patients consent, the patients will be randomly assigned the standard of care treatment or the SCPB. The investigators will then ask the patients to rate pain following insertion of the central line. The investigators will also evaluate different aspects of the patient's hospital course to evaluate their outcomes.

Inclusion Criteria:

• Patients who are 18 years and older, and;
• Present to the Akron General Emergency Department (Main) between March 1, 2021 and December 1, 2022, and;
• Require IJVC as a part of their clinical care.

Exclusion Criteria:

• Patients who are intubated; or
• Patients who undergo CPR; or
• Patients who have an allergy to lidocaine or bupivacaine; or
• Patients who have a contraindication to receiving a superficial cervical plexus block such as cellulitis over Erb's point or the internal jugular vein, abnormal anatomy, or prior surgery to the area.

Participants will be masked to the anesthesia route selected until after they report their pain scale report. Care provider cannot be blinded in order to complete.