Category II Tracing at 5 cm With Rising Baseline and Minimal Variability
A 24-year-old G1P0 at 38 weeks 5 days is in spontaneous labor at 5 cm, 80% effaced, station -1. Membranes are intact. She has no epidural and has been coping with breathing techniques. Over the last 40 minutes the FHR baseline has risen from 140 to 165 bpm. Variability is minimal (about 3 bpm). There are no accelerations and no decelerations. Contractions are every 4 minutes lasting 55 seconds, and the external tocodynamometer shows a resting tone that is difficult to interpret because the patient is moving. Maternal temperature is 37.9 C, pulse 104, blood pressure 108/68. The patient reports feeling warm and having chills. The nurse documents the tracing as Category I because there are no decelerations.
1. Is this tracing Category I? Justify your answer using the three-tier system and identify the concerning features.
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No. This is a Category II tracing, and the nurse's documentation is incorrect.
Category I requires all of the following: baseline 110–160 bpm, moderate variability (6–25 bpm), no late or variable decelerations, and accelerations (may be absent before 32 weeks). This tracing fails on at least two counts: the baseline is 165 bpm (tachycardia) and variability is minimal (about 3 bpm). The absence of decelerations does not make a tracing Category I.
Concerning features:
- Fetal tachycardia with minimal variability is a pattern that warrants evaluation for maternal fever or infection, dehydration, medication effects, or fetal hypoxia/acidosis. The combination is more concerning than either alone.
- Maternal fever (37.9 C), tachycardia (104), and chills raise concern for chorioamnionitis or another infectious process, which increases fetal oxygen demand and can produce tachycardia.
- The contraction assessment is unreliable because the patient is moving and the external monitor is not giving interpretable resting tone. Contraction frequency and resting tone should be reassessed, and an IUPC considered if clinically indicated.
Category II tracings require continued surveillance, evaluation, and intrauterine resuscitation as appropriate, with documentation of the pattern and interventions.
2. What are your next actions, and how would you document and communicate them?
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Actions:
- Notify the provider now with a structured report: baseline 165, minimal variability, no accelerations or decelerations, maternal temperature 37.9 C, pulse 104, chills, and unreliable contraction data.
- Intrauterine resuscitation: reposition, ensure hydration, consider oxygen per protocol, and reduce any uterine irritability. Reassess the tracing frequently.
- Evaluate for infection: report fever and chills, obtain vital signs per protocol, and anticipate orders for cultures, antipyretics, and antibiotics if chorioamnionitis is suspected.
- Improve contraction assessment: reposition the tocodynamometer, palpate the uterus, and consider an IUPC if ordered to obtain reliable resting tone and contraction data.
- Prepare for further evaluation such as fetal scalp stimulation or a change in monitoring plan per provider order, and prepare for possible expedited delivery if the pattern worsens.
Documentation should include the baseline, variability, accelerations/decelerations, contraction pattern and method of assessment, maternal vital signs and symptoms, the corrected category (Category II), each notification and response, interventions and the fetal response, and patient education. Correct the earlier Category I entry with a late entry per policy. Communication should be closed-loop: state the concern, the requested action, and confirm the plan.