Six Anxiety Scale Scores Before the Needle Goes In
The modified Norman Corah Dental Anxiety Scale captures five scenarios: anticipatory anxiety the day before, waiting room anxiety, drilling, scaling and polishing, and LA injection. A sixth item adds Incision and Knocking to the standard Corah subscales. Each is an integer score. Together they profile the patient's anxiety distribution before any sedation agent is administered.
That profile determines the sedation strategy. A patient with uniform high scores across all subscales is a different clinical case from one who scores low on anticipatory and waiting room anxiety but peaks on LA injection — suggesting needle phobia rather than generalized dental anxiety. The LA injection subscale alone, when correlated against the LA OAA/S score and the patient's sedation level at the time of injection, tells you whether the target sedation depth for that specific fear trigger was achieved.
This isn't a routine clinical record — it's a research-grade sedation database built by a dental sedationist who was systematically evaluating procedural outcomes against anxiety phenotypes.
The TCI Infusion Data Architecture
Target-Controlled Infusion with propofol generates a specific data profile: start-time, LA time, end-time — each with associated HR, Sys. BP, Dia. BP, and SpO2. Three vital sign snapshots across the procedure timeline. Then the specific propofol concentration data: LA concentration in ug/ml, end concentration in ug/ml, lowest and highest concentration across the infusion, total propofol dose in mg, and total infusion time in minutes.
The OAA/S (Observer's Assessment of Alertness/Sedation) scale appears at three points: LA-time and End-time, and separately as the lightest and deepest sedation levels recorded during the procedure. OAA/S ranges from 1 (minimal response to shaking/shouting) to 5 (responds readily to normal tone of voice). For dental conscious sedation under UK and Taiwanese guidelines, the target is OAA/S 3-4 — responsive, cooperative, not unconscious.
A patient who dips to OAA/S 2 during the procedure has crossed the conscious sedation boundary. The record captures it. Across 200 cases, the distribution of minimum OAA/S scores against TCI target concentrations shows whether a particular patient population requires adjustment to the standard dosing protocol, or whether certain LA injection events are consistently driving brief OAA/S dips that need to be managed.
The eight sedation method codes — TCIp (propofol TCI), IVm (IV manual), INm (intranasal midazolam), IMm (IM midazolam), IVp (IV propofol), N2O (nitrous oxide), Oral, Other — allow the database to function as a mixed-methods sedation record. A clinic that offers multiple sedation pathways can analyze outcomes across pathways from the same database, using the same anxiety scales and memory evaluation instruments.
Memory Evaluation as the Outcome Measure
Six memory evaluation fields, each using the scale 0 (none) to 3 (clear): Memory of LA injection, Incision, Drilling/Scaling/Polishing, Knocking, Suture, and Whole procedure from LA to suture. The evaluation happens at a documented datetime — specifically when the patient was assessed for recall, not when the procedure ended.
The memory evaluation is the amnesia quality measure. For dental sedation in anxious patients, anterograde amnesia for the procedure is often part of the therapeutic goal — the patient who remembers nothing of the drilling reports a better experience than the one who remembers it vaguely. But the memory profile needs to be measured systematically, not inferred. A patient who has clear memory of LA injection but none of the subsequent procedure may have a different sedation trajectory than one with vague recall of all components.
The Eye Open-time and Sit Up-time fields track recovery kinetics. The time from end of infusion to eye opening, and from eye opening to being able to sit up independently, defines the recovery profile that determines chair time and discharge planning. A sedationist who logs these consistently across fifty cases can characterize their population's median recovery time and counsel patients and caregivers accurately.
Patient satisfaction (1-5) and Dentist satisfaction (1-5) close the outcome measurement with the subjective experience layers. The question "Do you choose dental sedation again for next similar dental treatment?" is the repeat-intent measure — the single question that captures whether the experience was good enough to overcome the barrier of accepting sedation again.
The dentist, sedationist, dental nurse, and institution location fields capture the team and site context. If outcomes vary by institution location or correlate with specific practitioners, those associations are visible in the data without manual cross-referencing.