1.2 Case Entry Sequence & Structured Interrogation
Key Takeaways
- Case Entry is the universal gateway protocol that must be completed on every medical call before selecting a Chief Complaint protocol.
- Address verification is the supreme rule of emergency dispatch: an ambulance can respond without clinical details, but cannot respond without a verified location.
- The Six Primary Case Entry Questions must be read verbatim without paraphrasing, using scripted anchors like 'tell me exactly what happened' to focus the caller.
- Repetitive persistence is the required technique to break through caller panic, combining identical verbatim question repetition with a calm, controlled professional tone.
1.2 Case Entry Sequence & Structured Interrogation
Quick Answer: The Case Entry Protocol is the mandatory, universal gateway for every 9-1-1 medical call. It consists of six standardized primary questions: (1) Address of the emergency, (2) Callback phone number, (3) Chief Complaint phrased verbatim as "Okay, tell me exactly what happened", (4) Age of the patient, (5) Status of consciousness ("Is s/he awake?"), and (6) Status of breathing ("Is s/he breathing?"). Address verification is the paramount rule of emergency communications—units can respond without knowing the symptoms, but they cannot respond without a verified location. When callers are overcome by panic, EMDs employ repetitive persistence by repeating the verbatim question with identical phrasing and steady vocal inflection.
The Universal Gateway: Purpose of Case Entry
No matter what initial description a 9-1-1 caller provides—whether screaming that a family member has been shot, weeping that an infant has fallen, or calmly reporting a fever—the EMD never jumps straight to a specialized complaint protocol. Every call begins on Protocol Case Entry.
Case Entry accomplishes three vital functions within 30 to 45 seconds:
- Establishes Scene Location: Guarantees that rescue units have an accurate, unambiguous destination.
- Secures Communication Continuity: Obtains a verified callback number in case the line is disconnected.
- Identifies Immediate Life Threats: Screens for the most critical determinants of survivability (consciousness and breathing) to enable immediate ECHO dispatch or Fast Track life support.
The Six Primary Case Entry Questions
The MPDS mandates that the EMD present the six primary questions in strict, unvarying sequence:
1. "What's the address of the emergency?"
2. "What's the phone number you're calling from?"
3. "Okay, tell me exactly what happened?"
4. "Are you with the patient now?" / "How old is s/he?"
5. "Is s/he awake (conscious)?"
6. "Is s/he breathing?"
Deep Dive: Question Mechanics and Clinical Rationale
1. Address Verification: The Paramount Rule of Dispatch
Rule: The verification of the incident location is the first and foremost responsibility of the emergency medical dispatcher. Never compromise location for speed.
Untrained dispatchers frequently make the catastrophic mistake of getting drawn into the medical narrative before confirming where the emergency is. If a caller loses consciousness, the phone battery dies, or the line drops after giving medical details but before the address is verified, field responders cannot be dispatched.
Why CAD and 9-1-1 Data Are Not Enough
- Automatic Location Identification (ALI) Limitations: Cellular tower triangulation and GPS pings can have significant radius errors, particularly inside commercial structures, multi-family apartment complexes, or dense urban canyons.
- Vertical Location Gaps: Standard CAD mapping rarely provides the floor, apartment, suite, or building letter.
- Third-Party Callers: A caller at an office in downtown Chicago may be calling 9-1-1 for their elderly parent in a suburban residence 30 miles away. Dispatching to the caller's physical location results in complete failure.
Therefore, the EMD must ask: "What's the address of the emergency?" and follow up with explicit confirmation of apartment numbers, building names, entry gates, access codes, and cross streets.
2. Callback Phone Number
The question "What's the phone number you're calling from?" provides immediate insurance. Dropped calls, cellular tower handoff failures, and intentional disconnections occur daily in 9-1-1 centers. Having a confirmed callback number allows instant re-contact or permits responding field supervisors to ring the residence directly if front doors are barricaded.
3. Chief Complaint Phrasing: "Tell Me Exactly What Happened"
The specific phrasing of Question 3 is a masterpiece of dispatch psychology. The EMD must state: "Okay, tell me exactly what happened."
Why This Phrasing Is Mandatory
- Precludes Vague Diagnoses: Asking "What's wrong?" or "What's your medical problem?" encourages callers to offer speculative layperson diagnoses: "My dad is having a stroke!" or "He has pneumonia!"
- Anchors to the Inciting Event: "Tell me exactly what happened" directs the caller's brain to recount observable, factual events: "He was eating dinner, grabbed his throat, and fell out of his chair."
- Eliminates Conversational Drifts: It provides a structured, bounded prompt that minimizes rambling.
4. Patient Age and Caller Proximity
Confirming whether the caller is with the patient establishes the reliability of the answers. Asking "How old is s/he?" provides a vital clinical discriminator:
- Physiological Baselines: Respiratory rates, tidal volumes, and normal heart rates change drastically across neonates, infants, children, and adults.
- Protocol Logic: Patient age governs whether the EMD will subsequently launch Pediatric CPR versus Adult CPR, or invoke age-specific cardiac/stroke screening protocols.
5. Status of Consciousness: "Is s/he awake?"
The question "Is s/he awake?" assesses baseline neurological function and cerebral perfusion. An awake patient possesses protective airway reflexes (cough, gag). An unconscious patient has lost muscular airway tone, meaning the base of the tongue relaxes against the posterior pharyngeal wall, creating immediate mechanical asphyxiation.
6. Status of Breathing: "Is s/he breathing?"
Breathing is the definitive gateway to life support. If the patient is unconscious and not breathing (or breathing is described as agonal, snoring, or gasping), the EMD terminates further questioning and immediately transitions to Fast Track dispatch and Telephone CPR.
Summary Table: The Six Primary Case Entry Questions
| Step | Verbatim Scripted Phrasing | Primary Objective | Common Pitfalls to Avoid |
|---|---|---|---|
| 1 | "What's the address of the emergency?" | Establish physical response coordinates before anything else | Accepting cellular tower address without verbal caller verification |
| 2 | "What's the phone number you're calling from?" | Secure direct communication channel for reconnecting dropped calls | Relying solely on ANI screen display without verbal confirmation |
| 3 | "Okay, tell me exactly what happened?" | Elicit objective description of the inciting event; identify protocol | Asking "What's wrong?", leading to medical speculation and wandering stories |
| 4 | "Are you with the patient now?" / "How old is s/he?" | Determine observation accuracy and establish physiological age tier | Assuming adult status; failing to distinguish between infant (<1 yr) and child |
| 5 | "Is s/he awake (conscious)?" | Assess central nervous system perfusion and airway reflex maintenance | Accepting "He's out of it" without clarifying if awake or completely unresponsive |
| 6 | "Is s/he breathing?" | Determine respiratory status; screen for cardiac arrest or agonal respirations | Asking leading questions like "Is he breathing okay?" which masks agonal gasps |
The Rule of Verbatim Interrogation
A critical standard in MPDS is that questions must be read exactly as written. Paraphrasing is one of the most frequent causes of critical deviations during quality assurance audits.
The Danger of Paraphrasing
Consider what happens when a dispatcher alters Question 6:
- Scripted Protocol: "Is he breathing?"
- Caller: "He's making a snorting sound every few seconds, but not real breaths." -> Result: Cardiac arrest recognized. CPR started.
- Paraphrased Version: "Is he breathing okay?"
- Caller: "Well, no, not okay, he's breathing weird." -> Result: Dispatcher codes this as 'Breathing Problems' instead of Cardiac Arrest. CPR delayed; patient dies.
By inserting the subjective word "okay", the dispatcher gave the caller permission to classify abnormal agonal gasps as actual respiration, bypassing resuscitation protocols.
Managing Frantic Callers: The Hysterical Threshold & Repetitive Persistence
In acute emergencies, callers often cross what the IAED terms the "Hysterical Threshold." When a human being experiences severe emotional trauma, extreme adrenaline release causes physiological symptoms:
- Auditory exclusion (inability to hear ordinary conversational speech)
- Cognitive tunnel vision
- Severe motor restlessness and uncontrollable screaming or crying
The Failure of Conventional Calming Phrases
Telling a frantic caller: "Calm down!", "Relax!", or "Stop screaming!" is universally ineffective and counterproductive. To the caller, their hysteria is completely justified—their child or spouse is dying. Ordering them to calm down invalidates their terror and generates hostility.
The Technique of Repetitive Persistence
Developed and validated by Dr. Clawson, repetitive persistence is the scientifically established tool for penetrating the hysterical threshold. It combines two elements:
- A Firm, Calm, Controlled Tone: The EMD speaks with steady authority, neither whispering nor shouting, projecting an aura of absolute command.
- Verbatim Repetition with an Attentional Anchor: The EMD uses the caller's name or a firm anchor ("Listen to me"), followed by the exact same question with the exact same words and inflection.
Why It Works Neurologically
A panicked brain cannot process new linguistic data when trapped in an amygdala-driven emotional loop. If a dispatcher rephrases the question ("Where are you? What street are you on? Can you give me your house number?"), the caller's brain must re-decode three distinct verbal inputs, perpetuating panic.
When the dispatcher repeats the identical words, the acoustic pattern registers on the caller's brain without cognitive interference, cutting through the emotional fog until the caller breaks out of the loop and answers.
Realistic Dispatch Dialogue: Repetitive Persistence in Action
EMD: 9-1-1 Emergency, what's the address of the emergency? Caller: (screaming hysterically) Oh god, help me! He's dying! He's bleeding all over the kitchen! Please send someone right now! EMD: (Firm, steady tone) Ma'am, what is the address of the emergency? Caller: (wailing) There's blood everywhere! I don't know what to do! Hurry up! EMD: (Steady, identical inflection) Ma'am, listen to me. What is the address of the emergency? Caller: (hyperventilating) He cut his arm! It's spraying! EMD: (Calm, assertive, verbatim) Ma'am, I am going to help you. What is the address of the emergency? Caller: (pauses, gasp) It's 424 North Meadow Lane! EMD: 424 North Meadow Lane, what's the phone number you're calling from? Caller: 555-8392! EMD: Okay, tell me exactly what happened...
By refusing to escalate emotion, avoiding conversational rabbit holes, and applying repetitive persistence, the EMD secured the critical address in under 20 seconds, allowing units to roll immediately.
What is the primary operational reason that address verification must occur before any other question during Case Entry?
Which specific phrasing is mandated by the MPDS when interrogating the caller regarding the Chief Complaint during Case Entry?
When encountering a frantic, hysterical caller who fails to answer a Case Entry question, how should the EMD apply the technique of repetitive persistence?