7.1 Assisting TEE: Preparation, Probe Safety, Views, and Complications

Assist within a defined team role

The RCS task is to assist with transesophageal echocardiography, or TEE. The sonographer may prepare equipment, help position and monitor the patient, optimize images, record measurements, and anticipate the view sequence under the responsible clinician's direction. That task does not by itself authorize independent consent, sedation, probe insertion or manipulation, diagnosis, or interpretation. Those duties require the appropriate credential, privilege, and local policy. State roles before the procedure so one person is continuously responsible for the airway and physiologic monitoring while the probe operator concentrates on safe manipulation.

Confirm the order, indication, two patient identifiers, consent status, allergies, medication and anticoagulation history, fasting status under the sedation or anesthesia policy, required laboratory results, IV access, and planned level of sedation. Screen for dysphagia, odynophagia, prior upper gastrointestinal bleeding, esophageal stricture, diverticulum, varices or tumor, previous esophageal or gastric surgery, chest radiation, cervical-spine restriction, loose teeth or dentures, and airway or respiratory risk. A positive screen is not a sonographer's decision to cancel; promptly give the finding to the physician and sedation team for risk assessment. Complete the time-out and confirm suction, oxygen, monitoring, reversal and emergency supplies, and resuscitation readiness.

Sedation and topical anesthesia are medications, not merely imaging accessories. They are administered and monitored by personnel whose scope and privileges permit it. Follow the ordered monitoring plan, commonly including ECG, blood pressure, oxygen saturation, respiratory status, and additional ventilation monitoring when required. Record values and medications through the assigned workflow. New hypoxemia, apnea, hypotension, altered responsiveness, or rhythm change requires immediate communication and the emergency response defined by the team, even if the imaging sequence is incomplete.

Protect the patient and the probe

Before use, inspect the shaft, distal tip, lens, controls, cable, connector, and bite guard. Complete electrical-leak testing and other integrity checks at the frequency required by the manufacturer and facility. A cracked surface, exposed material, abnormal control, or failed test removes the probe from service. Verify the system's temperature display and alarm function when provided. Lubricate with an approved product, place a bite guard, remove removable dental appliances, and keep the distal tip neutral and unlocked for insertion unless the probe's instructions specify otherwise.

The authorized probe operator advances under direct clinical control. Never push through resistance, force flexion, or rotate a flexed tip against the esophageal wall. Avoid crushing, sharply bending, or suspending the probe by its cable. Pain, resistance, blood, inability to advance, unexpected temperature rise, or physiologic instability calls for stopping manipulation and alerting the operator. If oxygenation or ventilation deteriorates, airway and patient stabilization outrank image completion.

Build a view sequence from anatomy

ASE describes a comprehensive examination with 28 standard views when the indication, anatomy, patient condition, and available time permit. Multiplane angles are approximate labels, not targets that justify force. Begin with recognizable anatomy, rotate and flex gently, and use color and spectral Doppler only after the 2-D plane is correct.

Document required views that could not be obtained and why. An unconventional plane may be necessary for pathology, but 3-D imaging does not replace a complete 2-D survey. Accurate labels, ECG, gain, depth, focus, color scale, and representative clips make the physician's interpretation reproducible.

Recognize complications and complete reprocessing

Complications include lip, dental, tongue, pharyngeal, or laryngeal trauma; esophageal bleeding or perforation; aspiration; hypoxemia; airway obstruction, laryngospasm, or bronchospasm; hypotension; arrhythmia; and medication reaction. Stop, call the responsible clinician, support airway and circulation within training, and activate emergency procedures for concerning findings. After the probe is removed, inspect it and the patient's mouth when assigned, continue monitoring until recovery criteria are met, and follow policy for oral intake until protective swallowing has returned. After sedation, discharge restrictions apply. Severe chest, neck, or abdominal pain, hematemesis, dyspnea, fever, or new difficult swallowing needs urgent evaluation.

TEE probes contact mucous membranes and are semicritical devices. A sheath does not replace reprocessing because covers can fail. At the point of use, prevent soil from drying; then transport safely, clean before disinfection, and perform high-level disinfection between patients. Use only compatible chemicals, concentration, temperature, exposure time, rinsing, drying, storage, traceability, and quality checks in the probe and reprocessor instructions. Never return a damaged, inadequately reprocessed, or leak-test-failed probe to clinical use.

Audit the recorded examination

Use one probe movement at a time when checking orientation: advancing or withdrawing changes level, rotation changes the radial plane, and flexion centers anatomy. Reconfirm landmarks instead of trusting the multiplane-angle number alone. For structures such as the left atrial appendage, record the protocol's multiple angles because one plane can miss a lobe or imitate a filling defect. Before ending, review labels, view completeness, Doppler alignment, image quality, and documented limitations with the responsible clinician.

Resistance is a stop signal

Probe resistance, bleeding, pain, abnormal temperature, or physiologic deterioration requires immediate communication and cessation of manipulation. Completing a view never takes priority over airway, circulation, or tissue safety.