Recurrent Late Decelerations on Oxytocin With Maternal Fever at 40+5

Interpretation. Baseline 168 bpm (tachycardia), minimal variability, and recurrent late decelerations with every contraction. This is at minimum a Category II tracing with minimal (not absent) variability - it does not meet Category III criteria, but the combination of tachycardia, minimal variability, recurrent lates, and no acceleration to scalp stimulation is strongly suggestive of fetal hypoxaemia and metabolic compromise. Treat the category label as less important than the trend.

Contributors, each actionable:

• Tachysystole (>5 contractions/10 min averaged over 30 min). Oxytocin-driven, reducing uteroplacental filling time between contractions - this is the single most reversible cause.
• Supine position with flat bedhead. Aortocaval compression plus epidural-related sympathetic blockade reduces venous return and uterine perfusion.
• Maternal fever 38.3 °C with rupture of membranes 14 hours. This meets clinical criteria for intra-amniotic infection, which drives maternal and fetal tachycardia and increases oxygen demand. Fetal tachycardia is not merely a labour artefact - it may be the earliest sign.
• Possible rapid cervical change. No examination for 90 minutes; a sudden change alters the decision about where birth will occur.
• Epidural hypotension is possible; BP is currently acceptable but check against her baseline.

Name the physiology out loud in your documentation: decreased intervillous flow plus maternal pyrexia plus reduced maternal venous return. That framing justifies the sequence below.

Sequence (all within the first 10 minutes):

1. Stop the oxytocin infusion - remove the cause of tachysystole. Do not merely turn it down.
2. Reposition to left lateral or right lateral, or knee-chest if the decelerations persist. Relieve aortocaval compression.
3. IV crystalloid bolus (500–1,000 mL) to support venous return and epidural-related vasodilation; check BP and treat hypotension if present.
4. Vaginal examination to exclude cord prolapse, assess progress, and confirm membranes are not obstructing.
5. Notify obstetrician, anaesthetist, and neonatal team now - not in 40 minutes. Escalate to the second consultant by phone if the first is unavailable; the response pathway must not be the theatre schedule.
6. Treat suspected intra-amniotic infection: broad-spectrum intrapartum antibiotics per protocol (e.g., ampicillin plus gentamicin), paracetamol for pyrexia, and plan for expedited birth. Lowering maternal temperature alone often improves the fetal baseline.
7. Consider terbutaline 0.25 mg subcutaneously for persistent tachysystole in the absence of maternal tachycardia or haemodynamic instability - recheck maternal pulse first (she is already at 104).
8. Prepare for expedited caesarean - consent, group and save, theatre, anaesthetic review.

Avoid:

• Continuing oxytocin while decelerations persist.
• Amnioinfusion - it is indicated for recurrent variable decelerations from cord compression, not for late decelerations from uteroplacental insufficiency, and it adds risk with possible infection.
• Routine high-flow oxygen - current guidance does not support routine maternal oxygen for Category II tracings; it may be considered case by case but is not a substitute for the steps above.

Decision. Persistent recurrent late decelerations with minimal variability and no response to intrauterine resuscitation is a non-reassuring pattern requiring expedited birth. At 6 cm with no prospect of imminent vaginal birth, category-1/expedited caesarean is the correct call. Do not wait for the scheduled surgeon to become free: invoke the escalation policy, obtain the second consultant, and inform theatre and the anaesthetist that this is a category-1 start.

What to document, and why it matters:

• Time-stamped CTG description at the point of deterioration, including baseline, variability, decelerations, contraction frequency, and the failed scalp stimulation.
• Each resuscitation measure and the time it was applied, with the maternal response (pulse, BP, temperature).
• The exact time the obstetrician was first called, and the time the second consultant was contacted when the first was unavailable - this is the record that demonstrates appropriate escalation.
• Antibiotics and paracetamol given, with times.
• Cord gases and placental histology requests, and the neonatal team's presence at birth.
• The woman's own account of what was explained to her and her agreement.

Post-event. Debrief Rosa and her partner, review the oxytocin regimen and contraction charting, and use a structured review to examine why membranes were ruptured for 14 hours without a temperature check. Send blood cultures if maternal sepsis is suspected and continue antibiotics postpartum.