ABA Technology & Digital Tools 3 — Questions and Answers
Question 1: In transesophageal echocardiography (TEE), the midesophageal four-chamber view is obtained at approximately which probe insertion depth?
- 30–35 cm from the incisors (Correct answer)
- 15–20 cm from the incisors
- 40–45 cm from the incisors
- 50–55 cm from the incisors
Correct answer: 30–35 cm from the incisors
The midesophageal views are obtained at approximately 30–35 cm from the incisors, where the esophagus lies directly posterior to the heart.
Question 2: A bispectral index (BIS) value of 60 during general anesthesia indicates:
- Adequate hypnotic depth with low awareness risk (Correct answer)
- Awake and responsive patient
- Deep burst suppression pattern
- Isoelectric cortical activity
Correct answer: Adequate hypnotic depth with low awareness risk
A BIS of 40–60 corresponds to general anesthesia with acceptable depth; values of 60 reflect adequate hypnosis with very low intraoperative awareness probability.
Question 3: Which technology enables real-time visualization of needle tip position during ultrasound-guided regional anesthesia in obese patients with poor acoustic windows?
- Echogenic needle design with side-port reflectors (Correct answer)
- Nerve stimulator current titration
- Fluoroscopic C-arm guidance
- Optical coherence tomography
Correct answer: Echogenic needle design with side-port reflectors
Echogenic needles with textured or cut surfaces increase specular reflection, improving needle tip visibility under ultrasound especially in challenging acoustic windows.
Question 4: Which ventilator parameter is automatically adjusted by modern adaptive pressure-support modes (e.g., ASV, PRVC) to maintain a target tidal volume?
- Pressure support level (Correct answer)
- Respiratory rate trigger sensitivity
- Inspiratory flow waveform shape
- PEEP level
Correct answer: Pressure support level
Adaptive modes adjust the delivered pressure support breath-by-breath to hit a clinician-set tidal volume target based on measured lung compliance.
Question 5: Volumetric capnography (V-slope analysis) can non-invasively estimate which parameter important to anesthetic management?
- Dead space to tidal volume ratio (Vd/Vt) (Correct answer)
- Alveolar oxygen partial pressure
- Functional residual capacity
- Airway resistance
Correct answer: Dead space to tidal volume ratio (Vd/Vt)
Volumetric capnography plots CO2 against expired volume, and the phase III slope and Bohr equation allow calculation of physiologic dead space fraction.
Question 6: In electronic prescribing for anesthesia premedication, computerized physician order entry (CPOE) most effectively reduces which error type?
- Transcription errors from illegible handwriting (Correct answer)
- Pharmacist knowledge errors
- Patient allergy misidentification at pharmacy
- Wrong drug stocking in the Pyxis
Correct answer: Transcription errors from illegible handwriting
CPOE eliminates handwritten prescription illegibility, the most common source of transcription errors that lead to dispensing mistakes.
Question 7: High-fidelity patient simulation for anesthesia training is most valuable for developing competency in:
- Managing rare, high-stakes crises such as malignant hyperthermia (Correct answer)
- Learning basic knot-tying for vascular access
- Mastering routine preoperative documentation
- Interpreting outpatient billing codes
Correct answer: Managing rare, high-stakes crises such as malignant hyperthermia
Simulation excels at exposing trainees to low-frequency, high-acuity events like MH that are difficult to encounter and practice in real clinical settings.
ABA Technology & Digital Tools 3
In transesophageal echocardiography (TEE), the midesophageal four-chamber view is obtained at approximately which probe insertion depth?