Lesson L3-2 · authored fragments (docs/43)
Primary review content — the AI-avatar narration, in order.
Let's talk liquids. When a medicine comes as a liquid, you measure it in milliliters — that's the little 'mL' mark — and you use the measuring device that came with the medication. A medicine cup. Not a spoon from the kitchen drawer. I know a teaspoon is right there and it feels close enough. It isn't. A kitchen spoon can hold a lot more or a lot less than a real teaspoon, and that difference is your resident's dose. Too much or too little — both are a medication error. Now here's the part that trips people up: how you read the cup. Set the medicine cup down on a flat counter. Don't hold it up in the air — your hand tilts, and the reading is off. Now get your eyes down level with the liquid. Look at the top of the liquid. See how it curves, like a little smile? That curve is called the meniscus. Read your dose at the BOTTOM of that curve, not the top. Bottom of the curve, at eye level, on a flat surface. Every liquid, every time. One more habit to build: if your resident has a liquid cough medicine, give it last, after their other oral meds. So — mL only, never a kitchen spoon, cup flat on the counter, and read the bottom of the curve. That's a liquid dose done right, and it's your resident getting exactly what the doctor ordered.
12 of 12 critical claims are verified_by: null (Gate-2 SME sign-off pending → preview only, production-blocked under the Rule-3.6 waiver). · runtime budget: 12:00
# Concept mirror — MA.L3-2.D (Liquid Measurement — medicine cup & meniscus)
> **MIRROR / NOTES ONLY.** The authoritative concept entry is **docs/42 §E, `MA.L3-2.D`**
> (Instructional Domain Model). This file is the local traceability ledger + decision queue for the
> derived-asset bundle; if it ever disagrees with docs/42, **docs/42 wins** (docs/43 §22 authority flow).
| Field | Value |
|---|---|
| `concept_id` | `MA.L3-2.D` |
| `competency_id` | `C-3.2` (Oral medication forms & special considerations) |
| `lesson_ids` | `[L3-2, enteral-route lesson]` (liquid measurement recurs when a med is delivered by G-tube) |
| `clinical_risk` | **High** → ≥90% KC mastery, spaced repetition; sim micro-step is coaching (not force-fail); keys are re-review-gated, **not** SME-locked |
| `medication_error_prevented` | Over- or under-dose from measuring a liquid with the wrong tool or reading the meniscus wrong |
| `sme_status` | `in_review` |
| `apd_traceability_status` | sourced — two open anchors (`TODO(source-L32D-1)` units, `TODO(source-L32D-2)` read convention) |
## Rule-3.6 author-ahead waiver (recorded 2026-07-05)
The concept is `in_review`, not `approved`. Per docs/42 §I.1 / docs/43 §4, this bundle is authored
**ahead of concept approval under a Rule-3.6 waiver** as part of the Oral Route reference build.
Consequence: **every fragment in this bundle is `sme_status: "draft"`, preview-flag only, and
production-publish-blocked** until (a) the concept reaches `approved` and (b) a Gate-2 SME sign-off is
recorded in `content_revisions.sme_signoff_*`.
## Scope boundary honored (docs/42 §I.3.1, 2026-07-05 owner decision)
The **oral syringe as a device** and the **"<5 mL"** threshold are **MA.L3-2.E** `[Waiver360-added]`
best practice (ISMP/USP-derived), never implied APD-required. **This concept (D) is deliberately
silent on the syringe/threshold** — D teaches only the APD-traceable medicine-cup + meniscus skill.
The legacy L3-2 "which tool for a 2.5 mL dose → oral syringe" item is therefore **not** re-authored
here; the canonical D item is the **medicine-cup / bottom-of-curve** read (APD Mod2 v4 Q26, Ellen
Madison Risperidone 5 mL).
## Source ledger (projects into `payload_json.sources`)
- `curriculum_source`: "APD BMA Module 2 (liquid measurement) + APD Module 2 checkpoint v4 Q26 (Ellen Madison, Risperidone 5 mL)"
- `form_reference`: "n/a (measurement technique — no form)"
| # | Claim | Tag | Source | verified_by |
|---|---|---|---|---|
| C1 | Liquid oral meds are measured in **mL** using the **device that comes with the medication**; household/kitchen spoons are never used | `[APD]` | Mod2 s66 | null |
| C2 | A medicine cup is read on a **flat surface, at eye level, at the bottom of the curve (meniscus)** — not the top, not held in the air | `[APD]` | Mod2 s67; checkpoint **v4 Q26** (keyed c) — **`TODO(source-L32D-2)`** confirm bottom-of-meniscus is the APD standard | null |
| C3 | Liquid **cough** medications are given **last**, after the other oral meds | `[APD]` | Mod2 s67 | null |
| C4 | Preferred unit is **mL only** (no teaspoon equivalents on the MAR) | `[Needs Owner Review]` | open — **`TODO(source-L32D-1)`** (legacy SRC-L32-6) | null |
| C5 | Oral syringe / "<5 mL" threshold is **out of scope here** (→ MA.L3-2.E `[Waiver360-added]`) | boundary note | docs/42 §I.3.1 | n/a |
## Patient-safety chain (owner directive — this is a patient-safety concept)
1. **Medication error prevented:** your resident gets the wrong amount of a liquid medicine — too
much or too little — because it was measured with a kitchen spoon or read at the wrong line.
With a syrup like Risperidone, a couple of milliliters off is a real over- or under-dose.
2. **Why staff make this mistake (the real reason):** it is *not* forgetting. A teaspoon from the
kitchen drawer is right there, and it *feels* accurate — everybody has used one their whole life.
And nobody ever showed most new staff how to read a medicine cup, so they read it however they
happen to be holding it, at the top of the curve, glancing down from above. It's a cooking habit
carried onto the med cart.
3. **How the lesson/transcript prevents it:** the `l32-liquid-measurement` block names the tool rule
plainly ("mL device, never a kitchen spoon") and walks the exact read technique — cup flat on the
counter, eyes down to the liquid, read the **bottom** of the curve — plus the "cough meds last" tag.
4. **How the simulator reinforces it:** the Don Montana optional liquid micro-step makes the learner
physically set eye level and read the bottom of the meniscus. Because this concept is **High**, not
Critical, a wrong read triggers **coaching and a retry** — not a force-fail — then continues.
5. **How the KC verifies mastery:** `KC-L3-2-D-Q1` (Ellen-Madison MCQ) verifies the learner picks the
medicine cup + flat-surface + bottom-of-curve read against the APD Q26 key; `KC-L3-2-D-Q2`
(`meniscus_read`) verifies they can actually read the bottom of the curve at eye level and reject
the top-of-curve and doubled-mL traps.
## Decision queue → owner / SME (Michele + Nicole)
1. **`TODO(source-L32D-1)` — units.** Confirm APD-preferred units: **mL only**, or mL **with tsp
equivalents** for older MARs? (Legacy SRC-L32-6.) Narration/keys currently teach **mL only**;
C4 is `[Needs Owner Review]`, `verified_by: null`, and this bundle stays preview-only until resolved.
2. **`TODO(source-L32D-2)` — read convention.** Confirm "read at the **bottom** of the meniscus" is the
APD standard (legacy SRC-L32-7). Currently keyed from Mod2 s67 + checkpoint v4 Q26; `verified_by:
null` until SME confirms. **This gates the Q1/Q2 answer keys to production.**
3. **Confirm C3 placement** — does "give liquid cough meds last" (Mod2 s67) belong in this concept, or
should it move to the errors/summary concept (MA.L3-2.G)?
4. **Confirm the boundary in §I.3.1 holds for D** — D stays silent on oral syringe / "<5 mL" (that's E).
The doubled-mL and top-of-curve options in the KCs are *distractors only*, not asserted claims.
5. **`meniscus_read` is a proposed exercise type** (engineering — needs a CMS registry entry + React
component + validator before `KC-L3-2-D-Q2` can render). Spec staged in `../exercise-specs/meniscus_read.json`.
## Deferred remediation variants (owner decision 2026-07-05 — DEFERRED until the full route is done)
`KC-L3-2-D-Q1B`, `KC-L3-2-D-Q2B` are **not authored** in this bundle; `remediation.onWrong` references
them as "(deferred — authored on concept approval)". The aggregator records them in the manifest
`deferred_variants`.
Ellen Madison's MAR shows 5 mL of Risperidone liquid at 8:00 AM. What is the correct way to measure and read this dose?
Why: Right. Use the medicine cup that came with the medication, set it flat on the counter, get your eyes level with the liquid, and read at the bottom of the curve (the meniscus). That is exactly how Ellen's 5 mL dose is measured accurately.
Error prevented: Over- or under-dose of a liquid medication from using a kitchen spoon or reading the medicine cup at the wrong point/angle.
Misconception: "A teaspoon is a teaspoon"; "read the top of the curve"; "reading in-hand is fine."
The order is 5 mL. You have poured the liquid into a medicine cup and set it flat on the counter. First choose where to put your eyes, then choose the correct reading.
Why: Eyes level with the liquid, reading 5 mL at the bottom of the curve. That is an accurate liquid dose — Ellen gets exactly the 5 mL ordered.
Error prevented: Over- or under-dose of a liquid from reading the meniscus at the wrong point, wrong angle, or wrong graduation line.
Misconception: "Read the top of the curve"; "reading in-hand is fine"; "double the mL."
Entry: During the Don Montana med pass, an OPTIONAL liquid dose appears; the learner must measure it with a medicine cup and read the meniscus.
Mastery: ≥ 90% across C-3.2 items with spaced repetition; NO force-fail on this optional micro-step.
Shot: Eye-level close-up of a medicine cup on a flat surface with liquid at a marked line, beside a wrong shot of a cup held in the air.
Camera: Start on the held-in-air wrong shot; drop the eye-line to the flat-surface cup; macro push to the meniscus.
Avatar: Voiceover; Michele off-screen.
Visual: Eye-level meniscus close-up beside the held-in-air wrong shot; teach mL device + read at the bottom of the curve at eye level; reject kitchen spoons.
Animation: The eye-line drops to the flat-surface cup; the reading snaps to the meniscus bottom; the kitchen spoon is crossed out.
Infographic: Callouts 'flat surface', 'eye level', 'read the BOTTOM of the curve'; a crossed-out kitchen spoon; chip 'mL only - never a kitchen spoon'; chip 'give liquid cough meds last'.
Eye-level meniscus read on a flat-surface medicine cup beside a held-in-air wrong shot; crossed-out kitchen spoon.
🖼 image prompt: Flat-vector split image: left = a marked medicine cup on a flat surface viewed at eye level with the meniscus (curve) bottom aligned to a line, callouts 'flat surface', 'eye level', 'read the BOTTOM of the curve'; right = the same cup held in the air (wrong) and a crossed-out kitchen spoon; chip 'mL only - never a kitchen spoon'; neutral clinical palette; synthetic props. [APD] Mod2 s66/s67.
🎬 video prompt: The eye-line drops from a held-in-air cup to a flat-surface cup; the reading snaps to the meniscus bottom; a kitchen spoon is crossed out; a 'give liquid cough meds last' chip slides in. [APD]
Target runtime: 12:00 · 7 chapters · not rendered (url: null)
Learner completes a two-decision liquid read: (1) choose the correct viewing angle (eyes level with the liquid, cup flat on a surface); (2) select the correct reading among candidate graduation/curve options. Correct requires BOTH the eye-level angle and the bottom-of-curve reading at the ordered graduation. Any wrong angle or wrong reading fires the option-specific rationale and routes to remediation.