POSTER 411 / The Two-Curve Theory
See the image. Predict the route.
The screen presents an image. A spatial model helps connect that image to the curved path the blade and tube must travel.
At the physical station? Go directly to the Practice Studio.
411 / ROOM 01
Place the landmarks in space
The tongue, epiglottis, and vocal cords identify structures. The two-curve model connects them to the route through the airway.
Trace the route from mouth to trachea. Which landmarks would help you relocate yourself if the screen image became unfamiliar?
Compare your explanation +
Use the tongue, epiglottis and vocal cords as anatomical reference points. If the expected landmarks are lost, stop advancing and re-establish orientation.
TAKE THIS FORWARDKeep a route in mind as the image changes.
411 / ROOM 02
Follow the two curves
The primary oropharyngeal curve and secondary pharyngo-glotto-tracheal curve meet at an inflection point in the laryngeal vestibule. Greenland's model came from MRI studies of 42 normal adult volunteers. Use it to explain spatial relationships; anatomy, pathology and positioning can change the route in an individual patient.
Trace and name each curve. Where does the model place their change in direction?
Compare your explanation +
Primary: oropharyngeal. Secondary: pharyngo-glotto-tracheal. The model places the inflection point in the laryngeal vestibule; it does not predict every patient's three-dimensional airway.
TAKE THIS FORWARDThis is a model of relationships, not a guarantee of the route in every patient.
411 / ROOM 03
Let the model inform the movement
The camera and the tube have different jobs. Use the model to explain why the next Galleries address blade control and tube delivery separately.
Use the diagram to explain a good view with difficult tube delivery. What still has to change as the tube approaches the trachea?
Compare your explanation +
The tube must negotiate a trajectory that the camera image alone cannot complete. Appropriate blade position, tube approach and device-specific release work together; the diagram is an explanatory model.
TAKE THIS FORWARDTake the primary curve to the blade Gallery.
FROM THE GALLERY TO YOUR HANDS
Trace, then explain the curves
The two-curve diagram; the tabletop airway model when available.
First action: Locate the oral cavity on the diagram or model.
SOURCE CABINET
References & boundaries
Use the current local device instructions and educator-reviewed practice. Study findings apply to their stated settings and comparators.
411 / PRACTICE STUDIO · Model rehearsal
Trace, then explain the curves
Identify both curves and explain the change in direction between them.
YOU NEED The two-curve diagram; the tabletop airway model when available.
BEFORE YOU BEGIN
Check your setup.
The two-curve diagram; the tabletop airway model when available.
If equipment or instructions do not match, stop and ask the responsible educator. The equipment card identifies the local support and reset owner before the Station opens.
Equipment and support card →DO / STEP 01
Trace the primary curve.
Identify the oropharyngeal curve around the tongue.
Review the related Gallery Room →DO / STEP 02
Locate the inflection point.
Trace the secondary pharyngo-glotto-tracheal curve from the laryngeal vestibule toward the trachea.
Review the related Gallery Room →DO / STEP 03
Explain the model's limit.
The primary oropharyngeal curve and secondary pharyngo-glotto-tracheal curve meet at an inflection point in the laryngeal vestibule. Greenland's model came from MRI studies of 42 normal adult volunteers. Use it to explain spatial relationships; anatomy, pathology and positioning can change the route in an individual patient.
Review the related Gallery Room →AFTER YOUR FIRST REHEARSAL
Choose one improvement.
Use the labeled diagram, then trace the same route again.
Rehearse according to what you and your educator observe. Repetition counts do not establish proficiency.
BEFORE YOU LEAVE / THIS REHEARSAL
Show and explain.
Name both curves, locate the transition and explain why a visible glottis does not guarantee tube delivery. Ask your partner to trace the same route from your explanation.
Reset for the next learner
Restore the model and place the diagram where the next learner can see it.
Knowledge completion, observed simulation performance and supervised clinical transfer are different outcomes. The Studio finish line describes this rehearsal only. Repetition counts, page visits, a quiz or a certificate cannot establish independent clinical competence. Faculty should identify a specific improvement, coach it and reassess the relevant behavior; clinical progression and maintenance follow the institution's supervised process.
QUICK REVIEW
