Unit 3 Maternity Exam - Greater Lowell Technical School

Explanation:

Correct Answer: (C) Initiate a rapid response.

The clinical presentation of severe hypoxia, hypotension, altered mental status, and seizure activity in a laboring patient represents a life-threatening emergency that exceeds the scope of bedside nursing management alone. Initiating a rapid response immediately summons the multidisciplinary emergency team including physicians, anesthesia, and additional nursing support needed to simultaneously address the multiple critical issues, including potential amniotic fluid embolism, eclampsia, or other catastrophic obstetric emergencies.

Why Other Options are Incorrect:

A. Administering IV fluids is an important component of managing hypotension but is not the single priority intervention when the patient is experiencing a multi-system crisis with seizures and severely compromised airway, breathing, and circulation simultaneously.

B. Administering oxygen is a critical intervention for a hypoxic patient and should be done concurrently, but it cannot be the sole priority action when the patient is seizing and requires a full emergency response team to manage all life-threatening components of her deteriorating condition.

D. Providing emotional support is completely inappropriate as the priority intervention when a patient is seizing and in a life-threatening emergency. Emotional support is relevant in stable situations and cannot take precedence over emergency medical intervention.

Explanation:

Correct Answer: (B) Reposition the patient.

Sudden variable decelerations following membrane rupture are highly suggestive of umbilical cord compression, which can occur from cord prolapse or cord entrapment after the cushioning amniotic fluid is released. The immediate priority nursing action is to reposition the patient, typically to the left lateral position or knee-chest position, to relieve pressure on the cord and restore fetal oxygenation before notifying the healthcare provider.

Why Other Options are Incorrect:

A. Administering oxytocin would increase uterine contractions and worsen cord compression, further reducing fetal oxygenation. Oxytocin is absolutely contraindicated when variable decelerations indicate cord compromise.

C. Performing an amniotic infusion requires a physician order and an intrauterine pressure catheter and cannot be initiated by the nurse independently as a priority action before provider notification. It may be ordered subsequently to relieve cord compression.

D. Increasing IV fluids is a supportive measure that may improve uteroplacental perfusion but does not directly address the cord compression causing the variable decelerations. Repositioning is the more immediate and targeted intervention for relieving cord compression.

Explanation:

Correct Answer: (C) Cervical laceration.

Pushing or bearing down before the cervix is fully dilated to 10 cm can cause the incompletely dilated cervical tissue to be forced against the fetal presenting part. This pressure and friction against the partially dilated cervix can result in cervical lacerations, tearing of the cervical tissue, and potentially significant hemorrhage. This is why it is critical to coach the patient to breathe through contractions and avoid pushing until complete dilation is confirmed.

Why Other Options are Incorrect:

A. Increased use of oxygen may occur with the effort of pushing but is not the primary complication of premature bearing down and is not a direct consequence specific to pushing before full dilation.

B. Compression of the cord is a concern related to cord prolapse or certain fetal positions, but it is not the primary risk specifically associated with premature bearing down before complete cervical dilation.

D. Uterine rupture is a catastrophic complication most commonly associated with a scarred uterus from previous cesarean section or obstructed labor, not with premature bearing down in a normal labor situation.

Explanation:

Correct Answer: (D) Thinks her membranes have ruptured.

Rupture of membranes is an absolute indication to go to the hospital immediately regardless of whether contractions are present or how far apart they are. Once the membranes rupture, the risk of umbilical cord prolapse, ascending infection, and chorioamnionitis increases significantly with time. Prompt evaluation is essential to assess fetal well-being, confirm rupture, and initiate appropriate management.

Why Other Options are Incorrect:

A. Increased fetal movement is generally a reassuring sign of fetal well-being rather than a sign of labor. It is not an indication to go to the hospital and does not signal the onset of active labor.

B. Abdominal or groin discomfort is vague and can be caused by many non-labor related conditions such as round ligament pain, Braxton-Hicks contractions, or gastrointestinal discomfort. This alone is not a reliable indicator that hospital evaluation is needed.

C. Contractions that are 10 minutes apart are considered early latent phase labor for a primigravida. Current guidelines typically advise primigravidas to wait until contractions are 5 minutes apart, lasting 1 minute each, for 1 hour before coming to the hospital, unless other complications are present.

Explanation:

Correct Answer: (D) Duration longer than 90 seconds, interval shorter than 60 seconds.

This pattern describes uterine tachysystole or hyperstimulation, which is a dangerous contraction pattern that can cause fetal compromise. Contractions lasting longer than 90 seconds give the uterine muscle insufficient time to relax, and intervals shorter than 60 seconds between contractions prevent adequate restoration of uteroplacental blood flow. This leads to progressive fetal hypoxia and acidosis as the placenta cannot adequately exchange oxygen and carbon dioxide between contractions.

Why Other Options are Incorrect:

A. Contractions shorter than 30 seconds with intervals longer than 75 seconds represent short, infrequent contractions with adequate rest periods. This pattern would result in slow labor progress but would not cause fetal compromise from inadequate uteroplacental perfusion.

B. Contractions longer than 60 seconds with intervals shorter than 80 seconds represent a borderline pattern. While this warrants monitoring, it does not meet the threshold for the most dangerous pattern compared to option D with contractions over 90 seconds and intervals under 60 seconds.

C. Contractions shorter than 90 seconds with intervals longer than 120 seconds represent an adequate rest period between relatively normal-length contractions, which would not cause fetal compromise and would actually indicate very infrequent contractions.

Explanation:

Correct Answer: (B) A low platelet count.

A low platelet count is a contraindication to epidural block placement because the epidural procedure involves needle insertion into the epidural space near the spinal cord. Thrombocytopenia impairs the blood's ability to clot, significantly increasing the risk of epidural hematoma formation, which can compress the spinal cord and cause permanent neurological injury or paralysis. Most anesthesiologists require a platelet count above 80,000-100,000/mm³ before proceeding with epidural placement.

Why Other Options are Incorrect:

A. A history of diabetes mellitus is not a contraindication to epidural anesthesia. Diabetic patients routinely receive epidural blocks for labor and delivery, and diabetes does not increase the risk of the specific complications associated with epidural placement.

C. Previous cesarean delivery is not a contraindication to epidural block. Many women with previous cesarean deliveries attempt vaginal birth after cesarean and receive epidural analgesia safely. Previous cesarean is related to the mode of delivery decision, not anesthesia eligibility.

D. A history of migraine headaches is not a contraindication to epidural block. While a post-dural puncture headache is a possible complication of epidural placement, a pre-existing history of migraines does not prevent a patient from receiving epidural anesthesia.

Explanation:

Correct Answer: (B) Perform an amniotomy.

Hypotonic labor dysfunction occurs when uterine contractions become weak, irregular, and ineffective during active labor, resulting in slow or arrested cervical progress. When the patient is at 5 cm with intact membranes, an amniotomy (artificial rupture of membranes) is the appropriate intervention. Releasing the amniotic fluid allows the presenting part to apply direct pressure to the cervix, stimulating stronger and more coordinated contractions and augmenting labor progress.

Why Other Options are Incorrect:

A. An emergency cesarean section is not indicated for hypotonic labor dysfunction at 5 cm with no evidence of fetal compromise or other contraindications. Conservative augmentation measures are always attempted before surgical delivery.

C. Tocolytic drugs are medications used to suppress or stop uterine contractions and are used to delay preterm labor. They would worsen hypotonic labor dysfunction by further reducing already inadequate uterine activity.

D. Ordering a sedative would further depress uterine activity and worsen the hypotonic labor pattern by reducing the already weak and ineffective contractions, making it an inappropriate and counterproductive intervention.

Explanation:

Correct Answer: (A) Hyperventilation.

Blurred vision, numbness, and tingling of the hands and mouth are classic symptoms of hyperventilation-induced respiratory alkalosis. When a laboring woman breathes too rapidly and deeply, she blows off excessive carbon dioxide, causing a drop in PaCO2 that leads to cerebral vasoconstriction producing blurred vision, and peripheral neuromuscular changes causing the characteristic circumoral and hand tingling and numbness. This is a common occurrence during intense labor contractions and is managed by having the patient breathe into cupped hands to rebreathe CO2.

Why Other Options are Incorrect:

B. Hypertension in labor would present with severe headache, visual disturbances such as scotomata, epigastric pain, and edema consistent with preeclampsia. While visual changes can occur, the combination with hand and mouth tingling specifically points to hyperventilation rather than hypertension.

C. Anxiety can contribute to hyperventilation and may be the underlying trigger, but anxiety itself does not directly cause the specific neurological symptoms of numbness and tingling in the hands and mouth. These symptoms are the direct result of the CO2 changes from hyperventilation.

D. Hypoxia would present with cyanosis, decreased oxygen saturation, altered consciousness, and tachycardia. The specific pattern of circumoral tingling and hand numbness is not characteristic of hypoxia but is the hallmark presentation of hypocapnia from hyperventilation.

Explanation:

Correct Answer: (A) Help her breathe into her cupped hands.

When a laboring woman hyperventilates, she blows off excessive carbon dioxide, leading to respiratory alkalosis, tingling, and dizziness. Having her breathe into her cupped hands allows her to rebreathe the exhaled carbon dioxide, restoring CO2 levels and correcting the respiratory alkalosis. This is the immediate, simple, and effective first-line intervention that the nurse can implement without a physician order.

Why Other Options are Incorrect:

B. Notifying the doctor is not the immediate priority for hyperventilation, which is a common and manageable occurrence in labor that the nurse can independently address with breathing techniques before escalating to the physician.

C. Placing her flat on her back is contraindicated in labor as the supine position compresses the inferior vena cava by the gravid uterus, reducing venous return and cardiac output, which can cause supine hypotensive syndrome and fetal distress.

D. Initiating oxygen at 2 liters via a mask would worsen the situation by providing more oxygen without addressing the excess CO2 loss that is causing the hyperventilation and respiratory alkalosis. Oxygen therapy is not the treatment for hyperventilation-induced respiratory alkalosis.