Blunt Trauma In Pregnancy Essay

1754 words - 7 pages

Blunt Trauma in Pregnancy

Trauma affects 6-7% of pregnancies in the U.S. 60 - 67% related to automobile accidents.

Fetal mortality after maternal blunt trauma is 34 - 38%. The two major causes of fetal death after maternal blunt trauma are: Maternal shock/death, and placental abruption.

The pregnant trauma patient presents a unique challenge because care must be provided for two patients, the mother and the fetus. It is vital that the nurse know and understand the anatomical and physiological changes that occur during pregnancy. She must be aware of these changes, and how they can mask or mimic injury, and very importantly that fetal distress or loss can occur even when the mother has incurred no abdominal injuries.

Regardless of the apparent severity of injury in blunt trauma, all pregnant women should be evaluated in a medical setting.

Only viable fetuses are monitored, because no obstetric intervention will alter the outcome of a pre-viable fetus. Determination of fetal viability is subject to institutional variation: an estimated gestational age of 20 - 26 weeks and an estimated fetal weight of 500g. Are commonly used thresholds of viability. Therefore, patients who have minor trauma and who are at less than 20 weeks gestation do not require specific intervention or monitoring. All pregnant women beyond 20 weeks’ gestation should undergo a minimum of 4 - 24 hours, and in some cases as long as 48 hours of monitoring. Fetal distress may be the first sign of maternal hemodynamic compromise and fetal distress, and to identify possible placenta abruption.

Resuscitation of the more serious trauma patient must focus on the mother because the most common cause of fetal death is maternal shock or death. It is important to remember that the mother will maintain her vital signs at the expense of the fetus. Because plasma volume is increased by 50% and the mother is able to shunt blood away from the uterus, maternal shock may not manifest itself until maternal blood loss exceeds 30%.

Initial ABC assessment:

Airway and breathing: All pregnant trauma patients should receive supplemental oxygen, because the fetus is extremely sensitive to hypoxia and because the oxygen reserve is significantly diminished in the pregnant patient.

Because the heavy uterus may compress the great vessels when a pregnant women is supine, causing a decrease in blood pressure, thus a decrease in stroke volume, and consequently a decrease in uterine blood flow, the patient should be placed on her side, if she must lay supine, place a small pillow under one hip, this will tilt the uterus off the inferior vena cava, improving blood flow throughout the woman’s body and to the placenta.

Survival of the fetus depends on adequate uterine perfusion and delivery of oxygen. Uterine circulation has no auto-regulation system, uterine blood flow is directly related to maternal blood pressure. To maximize uterine perfusion and oxygenation to the fetus...

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