Lesson visuals · Diagrams

Pictures that teach

Seven original diagrams drawn for the lessons — pressure injuries, burns, injection sites, ECG and fetal circulation. Small files, crisp text, made to be read on a phone.

Skin integrity

Pressure injury — the stages

Cross-sections of skin showing the depth of tissue damage in pressure injury stages 1 to 4 and unstageable

Stage by depth, not by size. A small sore can be Stage 4 if it reaches bone — and a wound covered by eschar cannot be staged at all until the dead tissue is removed.

Burns

Burns — depth of the burn

Cross-sections showing superficial, partial-thickness and full-thickness burn depth

Depth decides the story. Superficial burns hurt and heal. Full-thickness burns destroy the nerve endings, so the center may not hurt at all — that silence is a danger sign, not a comfort.

Burns

Burns — rule of nines

Front and back body charts with rule of nines percentages: head 9, each arm 9, trunk 18 front and 18 back, each leg 18, perineum 1

The fastest surface-area estimate in the burn unit. Count in nines — and remember this is the adult chart. Children carry proportionally more of their surface in the head.

Medication administration

IM injection sites

Landmark diagrams for the deltoid, vastus lateralis and ventrogluteal intramuscular injection sites

Landmarks first, needle second. Every safe IM site is found by bone landmarks — acromion, greater trochanter, iliac crest — never by guessing a spot on the skin.

Cardiac · ECG

ECG — one heartbeat, labeled

One labeled ECG beat showing the P wave, QRS complex, ST segment, T wave and the PR, QRS and QT intervals

One beat, three waves, three intervals. If you can measure the PR and the QRS on a single complex, you can read any strip the exam puts in front of you.

Cardiac · ECG

ECG — the board rhythm patterns

ECG strips for normal sinus rhythm, sinus tachycardia, sinus bradycardia, atrial fibrillation, ventricular fibrillation and asystole

Read every strip the same way: rate, rhythm, P waves, QRS. Two of these six are act-first emergencies — VF gets a shock; asystole gets CPR and epinephrine, never a shock.

Maternal & child

Fetal circulation — the three shunts

Schematic of fetal circulation showing the ductus venosus, foramen ovale and ductus arteriosus shunts between the placenta and the fetal heart

Before birth, the placenta is the lung. Three shunts route blood around the fluid-filled lungs — and all three are supposed to close once the baby takes its first breaths.