Tachysystole with Recurrent Lates on Oxytocin

This is a Category II tracing, but not a benign one - it is a pattern that requires intervention now.

• Tachysystole: more than five contractions in 10 minutes averaged over 30 minutes. She has 12 in 20 minutes at 70 seconds each - roughly 70% of each 10-minute window spent contracting. Uterine blood flow is restored between contractions, and this pattern eliminates the recovery time.
• Recurrent late decelerations: late decelerations are uteroplacental insufficiency. Recurrent means with more than half of contractions; here it is nearly every one.
• Minimal variability in the presence of late decelerations is the concerning combination - it removes the reassuring buffer and suggests the fetus is already compensating poorly.

The mechanism is iatrogenic: excessive oxytocin producing tachysystole with inadequate placental perfusion. That framing matters because it also tells you the first therapeutic move - remove the drug - rather than continuing to watch the strip. Also note the absence of labor progress (4 cm unchanged in two hours), which affects the plan: even if you resolve the tracing, this induction is not working.

1. Turn the oxytocin off - not down. Every contraction without recovery worsens the fetal gas exchange, and a rate change takes many minutes to take effect because of the tubing dead space.
2. Reposition to left or right lateral, then consider knee-chest or Trendelenburg if the tracing does not improve - this relieves aortocaval compression and improves uteroplacental flow.
3. Give an IV crystalloid bolus (500–1,000 mL lactated Ringer's) through the existing line, and check maternal blood pressure for hypotension, which is a separate mechanism for late decelerations.
4. Vaginal exam to rule out rapid change in dilation, and to rule out cord prolapse if the decelerations become prolonged or the baseline falls.
5. Call the provider now with an SBAR - do not wait for the cesarean to finish. In parallel, notify the charge nurse and anesthesia so the OR is aware.
6. Consider tocolysis - terbutaline 250 mcg subcutaneously - if tachysystole persists after these measures with recurrent decelerations; it is the specific treatment for hyperstimulation.
7. Oxygen only if maternal hypoxemia is documented. Routine oxygen for a Category II tracing is not indicated and can mask deterioration.
8. Prepare for expedited delivery if the tracing does not recover within a few contractions after stopping the oxytocin.

Things not to do here: amnioinfusion treats variable decelerations, not late; fetal scalp stimulation is used for minimal variability without decelerations and will not help now; and restarting oxytocin at any rate before the tracing normalizes is unsafe.

S: 'I'm calling about room 8, [name], 39 and 2, on oxytocin at 12 milliunits per minute - she has tachysystole with recurrent late decelerations and a Category II tracing.'

B: 'Twelve contractions in 20 minutes averaging 70 seconds, baseline 150 with minimal variability, late decelerations to 118 with every contraction. She's 4 cm, unchanged in two hours. No prior uterine surgery. Vitals stable. I've turned the oxytocin off, repositioned her, given a 500 mL bolus, and examined her - no cord. This started in the last 30 minutes.'

A: 'I think this is oxytocin-induced hyperstimulation with uteroplacental insufficiency and it is not recovering with the basic measures. I don't think we can safely restart oxytocin, and she isn't progressing.'

R: 'I need you here or a decision now: I'm asking for an order for terbutaline 250 micrograms subcutaneously, and I want you to evaluate for operative delivery if the tracing doesn't improve in the next few contractions. Do you want me to have anesthesia come look at her?'

Document the conversation, the time, the interventions and the fetal response to each one. A verbal order to 'just turn it down' should be clarified - record the actual order and immediately loop back to the provider if the pattern persists.