Page 73 - 2023 Elctronic Book (3) Normal Labor_Neat

10) Doesn't transfer infection to mother and fetus.

 Disadvantages:

1) May limit maternal movement.
2) The ultrasonic transducer may pick up and trace extraneous sound.
3) it may be difficult to obtain a state tracing if the mother is obese or is moving and active

during labor.
4) Not accurate.
5) Disruption of maternal movement.

 Abnormal FHR patterns:
1. Tachycardia (more than 160 beat/min):
a base line of fetal heart rate for at least 10 minutes. That is greater than 160 beat/min

for at least 10 minutes.
It's degree: - Mild ◊ 161 : 180 beat/minute - Sever ◊ 181 beat/minute.

Causes :- Fetal distress.
- Fetal anemia.
- Maternal anemia.

- Prematurity.
- Maternal fever.

- Maternal or fetal hyperthyroidism.
- Drugs as atropine and beta-sympathomimetic agents.
Management ;

According to causative factor.
- Antipyretic: to slow metabolism and decreased fever.
- Increasing oxygen to treat fetal hypoxia.

- Assess maternal temperature.
- Monitor for change of fetal heart rate pattern.
- Hydrate to improve circulating volume.

- Turn patient to left side.
- Reduce stressors (turn off oxytocin, treat maternal fever).
2-Bradycardia (less than 120 beat/minute):

base line fetal heart rate between 100:120 beat/minute.
Causes:
- Fetal distress.
- Congenital fetal heart block.

- Beta – blockers given to the mother.

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