Exhibit: the chart gives you the weight in the wrong unit
A simulated record frame with four tabs butted along the top edge, the ORDERS tab active and tinted, four harvestable values underlined in the body, and a numbered chip in the left gutter beside each of those rows with the weight row's chip drawn in the warning tone.
SIMULATED ELECTRONIC RECORD — TABS: DEMOGRAPHICS · ORDERS · MAR · PHARMACY
DEMOGRAPHICS
- Patient: R.T., age 58
- Allergies: none known
- Weight: 176 lb — entered from bedside scale
- Height: 178 cm
- Code status: full
The kilogram value is deliberately absent. That absence is the exhibit.
ORDERS — active tab
- 0600 — sodium chloride 0.9 %, 75 mL/hr continuous. (active, not the item)
- 0615 — vancomycin 15 mg/kg intravenously every 12 hours; dilute each dose in 250 mL; infuse over 90 minutes
- 0620 — acetaminophen 650 mg by mouth every 6 hours as needed for fever. (active, not the item)
- 0630 — vital signs every 4 hours. (active, not the item)
PHARMACY
- Preparation note: 1 g vial reconstituted to 50 mg/mL. Dispense from reconstituted vials.
WORK PANEL — all four answers, worked
Weight in kilograms: 176 lb × (1 kg / 2.2 lb) = 80 kg
Dose in milligrams: 80 kg × 15 mg/kg = 1200 mg
Volume to withdraw from the reconstituted vials: 1200 mg × (1 mL / 50 mg) = 24 mL
Pump rate: 90 min × (1 hr / 60 min) = 1.5 hr. 250 mL ÷ 1.5 hr = 166.67 = 167 mL/hr
The harvest rule
A calculation exhibit hides exactly four numbers across three tabs, and it always hides at least one of them behind a unit conversion. Find all four before you compute anything, and write the weight in kilograms at the top of your scratch sheet so you never reach for the pound figure again.
The three inactive order lines are noise. They are realistic, they are active orders, and none of them contributes a digit to the answer. Learning to leave them alone is half of what this page teaches.
Watch outthe chart will never hand you the unit you need. It hands you the unit the scale produced.
Margin noteexhibit anatomy and tab behavior are taught elsewhere. → BOOK 01 · P61
Takeawayharvest first, convert the weight second, compute third.