📼 Fetal Monitoring & Decelerations
VEAL CHOP, what each deceleration means, and why the answer to almost everything is turn her on her left side.
⭐ VEAL CHOP — the whole skill
Read the deceleration by its shape and its timing against the contraction. Four patterns, four causes, four responses.
| V E A L | C H O P | Means | Do |
|---|---|---|---|
| Variable decel | Cord compression | Cord squeezed — abrupt, V or W shaped, unrelated to contractions | REPOSITION the mother |
| Early decel | Head compression | Normal — mirrors the contraction exactly | Nothing. Document |
| Accelerations | Oxygenation OK | Reassuring — a healthy fetus | Nothing. Good sign |
| Late decel | Placental insufficiency | The worst one — begins after the contraction peaks, returns after it ends | Full intervention |
🧠 How to tell early from late in one look
Early decelerations line up with the contraction. The lowest point of the dip sits directly under the peak.
Late decelerations lag. The dip starts after the peak and has not recovered by the time the contraction is over.
Lining up = normal. Lagging behind = the placenta is failing.
🚨 Late decelerations — the intervention order
⭐ Why the left side, every time
The uterus rests on the inferior vena cava when the mother is supine. That reduces venous return, which drops cardiac output, which drops placental blood flow.
Turning her left lifts the uterus off the vessel. Venous return recovers, so placental perfusion recovers.
"Left side" is the answer to an enormous number of maternity questions.
💧 Amnioinfusion
For repetitive variable decelerations, sterile fluid is infused into the uterus to cushion the cord. It treats compression, not placental insufficiency.
👀 Reading the strip properly
Baseline
Normal fetal heart rate is 110–160 bpm, assessed over 10 minutes between contractions.
- Tachycardia >160 — maternal fever, infection, dehydration, drugs
- Bradycardia <110 — cord compression, maternal hypotension, rapid descent
✅ Variability — the most important single feature
Moderate variability means the fetal nervous system is well oxygenated. The line should look slightly bumpy, fluctuating 6–25 bpm.
| Variability | Means |
|---|---|
| Moderate (6–25) | Reassuring — the single best sign of fetal wellbeing |
| Absent | Concerning — hypoxia, acidosis, or sedation |
| Minimal | May be sleep cycle, drugs, or early hypoxia |
| Marked | Investigate |
A flat line with no variability is more worrying than an occasional deceleration. Variability is the thing to protect.
📑 External vs internal monitoring
| External | Internal | |
|---|---|---|
| How | Belts on the abdomen — ultrasound + toco | Scalp electrode + intrauterine pressure catheter |
| Needs | Nothing | Ruptured membranes, dilated cervix, engaged head |
| Gives | Rate and contraction timing | Accurate rate AND contraction strength |
| Risk | None; can lose signal with movement | Infection |
Only internal monitoring measures how strong a contraction is — external toco shows frequency and duration only.
🎯 NCLEX traps
- Late = placental = the bad one. Variable = cord = reposition
- Early decelerations need no action
- Left side first, then stop oxytocin, then oxygen
- Moderate variability is the best reassurance there is
- Internal monitoring requires ruptured membranes