Clinical 6 Gline EF monitoring and fetal distress management Flashcards
Tocodynamometer
external contraction monitor.
Measures frequency and duration.
Does not measure strength.
Intrauterine pressure catheter
measures strength, frequency and duration.
Doppler
ultrasound through abdomen measures heart rate.
Fetal scalp electrode
Monitors R-R of QRS complex
extrapolates a heart rate
Base rate from sympathethic
150-160
sympathetic nervous system develops first
what lowers rate and gives variability
vagus nerve
parasympathetics develop second
FHR monitoring normal
110-160
FHR Abnormal Tachycardia
> 160 bpm
FHR Abnormal Bradycardia
< 110 bpm
Causes of Tachcardia
MATERNAL FEVER INFECTION- maternal or fetal Hypoxemia Prematurity Dehydration Thyrotoxicosis Pharmacological Agents
Causes of Bradycardia
HYPOXEMIA
Pharmacological Agents
Fetal Arrhythmia’s (heart block)
Maternal Hypotension.
Benefits of FHR monitoring
normal =95% of well being