A pregnant woman at 28 weeks gestation is lying supine during a non-stress test when she suddenly becomes pale, diaphoretic, and reports feeling dizzy and nauseous. Her blood pressure drops from 110/70 mmHg to 85/45 mmHg. What is the most appropriate immediate nursing intervention?
1Administer oxygen at 2 L/min via nasal cannula
2Elevate the patient's legs above heart level
3Prepare for emergency cesarean delivery
4Position the patient on her left side✓ 정답
해설
Supine hypotension syndrome results from vena cava compression by the gravid uterus. Immediate left lateral positioning is the most effective intervention to relieve compression and restore normal circulation, preventing maternal and fetal complications.
Core Nursing ExplanationKey Concept Analysis: This question assesses the recognition and immediate management of Supine Hypotensive Syndrome (also known as aortocaval compression syndrome). This is a critical condition in late pregnancy where the gravid uterus compresses the inferior vena cava (IVC) when the mother is in a supine position. This compression reduces venous return to the heart, leading to a significant drop in cardiac output and blood pressure, causing symptoms of dizziness, pallor, diaphoresis, and nausea—essentially a form of Watch out for confusion!preload shock.
Answer Rationale: Key Point! The most appropriate immediate nursing intervention is to Position the patient on her left side. This simple, non-invasive action directly addresses the root cause by shifting the uterus off the major vessels, relieving the compression on the IVC and aorta. This allows venous return and cardiac output to be restored rapidly, which is the priority before any other intervention. Administering oxygen or elevating legs are supportive measures, but they do not solve the primary mechanical problem.
Distractor Analysis:
① Administering oxygen is a supportive measure for hypoxia but does not correct the hemodynamic compromise caused by IVC compression. It may be done concurrently or after repositioning.
② Elevating the legs (Trendelenburg position) is a standard shock position to improve venous return. However, in supine hypotension syndrome, it is less effective than left lateral positioning because the uterus remains compressing the IVC. It might be used if left lateral positioning is not possible.
③ Preparing for an emergency cesarean delivery is a drastic and incorrect response. This scenario describes a maternal positioning complication, not a primary fetal emergency like placental abruption or uterine rupture. The intervention is positional, not surgical.
Related Concepts: This syndrome typically occurs after 20 weeks of gestation. Nursing care for all pregnant women in the second and third trimesters includes avoiding the supine position for procedures or rest. The left lateral position is preferred, but a right lateral tilt or placing a wedge under the right hip are also acceptable alternatives to displace the uterus.
Concept Summary
Concept
Key Points
Supine Hypotensive Syndrome
IVC compression by gravid uterus in supine position → ↓ Venous return → ↓ Cardiac output → ↓ BP & symptoms of shock.
Primary Intervention
Left lateral positioning (or lateral tilt) to relieve compression.
Typical Onset
After 20 weeks gestation; risk increases with gestational age.
Nursing Prevention
Educate to avoid supine position; use lateral positions for sleep and procedures.
Side-by-Side Comparison!
Condition
Primary Cause
Key Symptoms
Immediate Nursing Action
Supine Hypotensive Syndrome
Mechanical IVC compression
Dizziness, pallor, diaphoresis, nausea in a supine pregnant woman
Reposition to left side
Hemorrhagic Shock (e.g., Placental Abruption)
Blood loss
Vaginal bleeding, abdominal pain, rigid uterus, signs of hypovolemia
Two large-bore IVs, fluid resuscitation, prepare for delivery
Call for help, CPR if needed, support ABCs, prepare for massive transfusion
Anatomy, Physiology & Pharmacology Points
Anatomy: The inferior vena cava (IVC) is located to the right of the spine. A pregnant uterus in the supine position compresses this vessel against the lumbar spine.
Pharmacology: Medications like vasopressors are not the first-line treatment. The intervention is mechanical/positional. IV fluids may be given after repositioning if BP does not improve promptly.
Memory Tips
Mnemonic: "LEFT is LIFE for Mom and Baby." Left Lateral position Lifts the Uterus off the Vessels.
Visualize: Picture a water hose (IVC) being stepped on (by the uterus). To get water flow back, you move your foot (reposition), you don't just pump more air (give O2) or squeeze the hose elsewhere (elevate legs).
High-Frequency NCLEX Topics
This is a classic NCLEX question. The NCLEX loves to test:
1. Priority Action: Simple repositioning vs. more complex interventions.
2. Maternal Safety: Recognizing a common, preventable complication of pregnancy.
3. Pathophysiology Application: Connecting the symptom (hypotension) to the specific cause (IVC compression) and the correct, cause-specific intervention.
Watch Out for Question Variations!
Symptom Identification: "A client at 32 weeks gestation becomes lightheaded while lying flat for an ultrasound. The nurse recognizes this as indicative of..."
Preventive Education: "The nurse is teaching a prenatal class. Which instruction should be included to prevent supine hypotensive syndrome?" (Answer: "Avoid lying flat on your back.")
Priority in a List: Given a list of actions (start IV, give O2, call provider, reposition), you must select the first action.
Nursing Clinical Practice GuideClinical Scenario: You are assisting with a Non-Stress Test (NST) for Ms. Johnson, 28 weeks pregnant. As she lies on the exam table, she says, "I feel really dizzy and sick." You note she is pale, sweating, and her BP has dropped significantly.
Nursing Intervention Strategy:
1Immediate ActionSay, "I'm going to help you roll onto your side," and manually assist her into a left lateral position. If a full lateral position is difficult, use a rolled towel or wedge to achieve a left lateral tilt of at least 15-30 degrees.
2Simultaneous AssessmentWhile repositioning, ask your colleague to:
* Re-check blood pressure and heart rate.
* Apply pulse oximetry to monitor oxygen saturation.
* Assess fetal heart rate (FHR) via the monitor—bradycardia may occur due to reduced uterine blood flow.
3Supportive CareOnce positioned, administer oxygen via nasal cannula if indicated by low SpO2 or persistent symptoms. Stay with the patient, provide reassurance, and monitor for symptom resolution.
4DocumentationDocument the event thoroughly: patient's position, symptoms, vital sign changes, your intervention (left lateral positioning), the patient's response, and fetal status.
Patient Safety and Precautions:
* Prevention is Key: Never leave a pregnant woman in the supine position unattended during procedures like NSTs, ultrasounds, or in bed rest. Always use a lateral tilt.
* Contraindication: Do not attempt to sit the patient up quickly; this could worsen hypotension. The goal is to relieve vascular compression, not to change orthostatic pressure.
* Monitoring: Symptoms should resolve rapidly (within 1-2 minutes) after repositioning. If hypotension and symptoms persist, consider other causes of shock (e.g., hemorrhage) and activate the emergency response system.
1RecognizeIdentify symptoms (dizziness, pallor, diaphoresis, nausea) in a supine pregnant woman >20 weeks.
2RepositionImmediately turn patient to left side (or right side if left is contraindicated).
3ReassessCheck maternal BP, HR, and FHR.
4SupportAdminister O2 if needed. Consider slow IV bolus of isotonic crystalloid (e.g., Lactated Ringer's) if BP remains low after positioning.
5ReportNotify the provider of the event and the patient's response.
Medication Note: IV fluids (e.g., 0.9% Normal Saline) may be used as a secondary measure. Vasopressors are rarely needed and are only considered if positioning and fluids fail, as they may further compromise placental perfusion.
A Word from Your Senior Nurse
"Nursing is not just about carrying out physician orders — it's about being the frontline guardian for your patients! In clinical practice, recognizing subtle changes in a patient's vital signs early can prevent deterioration. This scenario is a perfect example of how a simple, knowledgeable nursing action—turning a patient—can be lifesaving for both mother and baby. It prevents a syncopal fall, protects cerebral perfusion for mom, and maintains crucial blood flow to the placenta. When studying for your boards, don't just memorize 'left side' — understand why it works. That mindset will not only earn you a great score on the NCLEX but will make you a truly confident, professional nurse who sees the 'why' behind every intervention!"
Supine Hypotensive Syndrome — A condition in late pregnancy where the gravid uterus compresses the inferior vena cava when the mother lies supine, leading to decreased venous return, cardiac output, and blood pressure.
Inferior Vena Cava — The large vein that carries deoxygenated blood from the lower body to the right atrium of the heart. Compression by the pregnant uterus is the primary cause of supine hypotension.
Left Lateral Position — The recommended position to relieve aortocaval compression in pregnant women, as it displaces the uterus off the major blood vessels.
Non-Stress Test — A common prenatal test used to monitor fetal well-being by assessing the fetal heart rate in response to fetal movement.
Preload — The volume of blood in the ventricles at the end of diastole. Supine hypotension syndrome reduces preload by impairing venous return.