Study: Manometry With & Without Lidocaine

High resolution pharyngeal manometry (HRPM) is used for assessing swallowing pressure along
the length of the pharynx and upper esophageal sphincter. Pressure measurements in the region
of the velopharynx, tongue base, and upper esophageal sphincter are obtained by passing a
catheter with pressure sensors through the patient's nose and past the upper esophageal
sphincter. Patients are presented various volumes of liquid to swallow and potentially asked
to perform postural strategies such as a head turn or chin tuck during swallowing while the
catheter is in place. Clinically, approximately 90% of patients report various discomfort
associated with the procedure. Discomfort can result in patient refusal to participate or an
inaccurate picture of a patient's swallowing pressures. Conversely, use of anesthesia can
potentially alter swallowing physiology.

Recent studies have studied the effects of lidocaine on penetration/aspiration and subject
discomfort during flexible endoscopic evaluations, yet findings are inconclusive or
contradictive. Investigators aim to determine whether subjects report a difference in comfort
with HRPM conducted following application of lidocaine as an anesthetic as compared to HRPM
conducted without anesthetic.

Inclusion Criteria:

1. Healthy male and female adults 18-65.

2. All races.

3. Able to consent for self.

Exclusion Criteria:

1. History of dysphagia.

2. History of previous pharyngeal or esophageal manometry.

3. History of facial fracture or abnormalities precluding passage of catheter through
nares.

4. History of esophageal pathology including previous resection or perforation.

5. Pregnant

6. Known lidocaine allergy or sensitivity