A nurse is caring for a client who is in a trial of labor for vaginal birth after cesarean (VBAC). The client reports a sudden tearing pain in their back and side that does not feel like a uterine contraction.
Which of the following findings indicates the client may be experiencing a uterine rupture?
Observation of a sudden gush of amniotic fluid.
Hypotension with a blood pressure of 85/40 mm Hg.
Severe bradypnea with a respiratory rate of 10/min.
Palpation of the fetal presenting part in the cervical os.
The Correct Answer is B
Choice A rationale
A sudden gush of amniotic fluid typically indicates rupture of membranes (ROM), which can be spontaneous or induced. While ROM can occur during labor, it is not a direct indicator of uterine rupture, which is a catastrophic event involving the tearing of the uterine wall and often presents with different clinical signs.
Choice B rationale
Hypotension with a blood pressure of 85/40 mm Hg is a critical finding suggesting hypovolemic shock, often due to internal hemorrhage, which is a common consequence of uterine rupture. The sudden loss of maternal blood into the abdominal cavity leads to a rapid decrease in circulating blood volume and subsequent systemic hypotension.
Choice C rationale
Severe bradypnea with a respiratory rate of 10/min is not a primary indicator of uterine rupture. Bradypnea often suggests central nervous system depression, possibly from medication effects or other neurological events, but is not a direct physiological response to the acute blood loss and pain associated with a uterine tear.
Choice D rationale
Palpation of the fetal presenting part in the cervical os is a normal finding during labor progression as the fetus descends. However, if the presenting part is palpated higher or outside the uterus, it can indicate expulsion of the fetus into the abdominal cavity following a complete uterine rupture, which is an abnormal and emergent finding.
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Correct Answer is B
Explanation
Choice A rationale
A temperature of 37.7° C (99.9° F) in the immediate postpartum period is a relatively common and often benign finding, typically within normal limits or indicating mild dehydration or exertion from labor. A slight elevation is not usually a cause for immediate concern unless accompanied by other signs of infection, which would warrant further investigation. Normal range is 36.5° C to 37.5° C (97.7° F to 99.5° F).
Choice B rationale
A boggy fundus is a significant finding that the nurse should report immediately. A boggy, soft uterus indicates uterine atony, which means the uterine muscles are not contracting effectively. This significantly increases the risk of postpartum hemorrhage due to inadequate compression of uterine blood vessels.
Choice C rationale
Lochia rubra with small clots is considered a normal finding in the immediate postpartum period. Lochia rubra is the initial dark red discharge consisting of blood, decidual tissue, and mucus. Small clots are expected as blood clots and detaches from the uterine wall, reflecting normal uterine involution.
Choice D rationale
Minimal perineal edema is a normal and expected finding after vaginal delivery. The trauma of childbirth often results in some degree of swelling in the perineal area. "Minimal" edema indicates that the swelling is not excessive and does not suggest a complication requiring immediate reporting to the provider.
Correct Answer is D
Explanation
Choice A rationale
900 mL of urine output since birth (9 hours postpartum) translates to an average of 100 mL/hour. A normal urine output is typically 0.5 to 1 mL/kg/hour, which is usually greater than 30 mL/hour for adults. This indicates adequate renal perfusion and fluid balance rather than deficit.
Choice B rationale
A temperature of 37.6° C (99.6° F) is considered a low-grade fever. While it could be an early sign of infection, it is not a direct indicator of fluid volume deficit. Normal postpartum temperature may slightly increase due to dehydration or exertion during labor but usually remains below 38°C (100.4°F).
Choice C rationale
Reports of excessive sweating could be a compensatory mechanism for fever or a response to hormonal changes postpartum, but it is not a primary indicator of fluid volume deficit. In fact, excessive sweating can contribute to fluid loss, but it is not the most definitive sign.
Choice D rationale
A blood pressure of 80/55 mm Hg, particularly with a quantitative blood loss of 1200 mL, is a significant indicator of fluid volume deficit, specifically hypovolemic shock. Normal postpartum blood pressure is usually similar to pre-pregnancy levels (e.g., 90/60 to 120/80 mmHg). The low blood pressure reflects inadequate circulatory volume compromising tissue perfusion.
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