Prehospital Academy Lesson 39.1
The Gravid Patient
This lesson provides an overview of the gravid (pregnant) patient in the prehospital setting for EMTs. While pregnancy is a normal physiological process, it involves significant changes to the maternal body systems that can impact assessment and management during emergencies. Understanding these physiological adaptations and potential complications is crucial for providing effective and compassionate care to both the mother and the unborn fetus.
Physiological Changes in Pregnancy
Pregnancy profoundly affects all major organ systems. EMTs should be aware of these changes to interpret vital signs and patient presentations accurately.
Cardiovascular System:
Increased Blood Volume: By up to 45% (mainly plasma), leading to dilutional anemia.
Increased Heart Rate: By 10-15 bpm.
Increased Cardiac Output: By 30-50%.
Decreased Blood Pressure: Especially in the second trimester, due to vasodilation.
Supine Hypotensive Syndrome: Occurs when the gravid uterus compresses the vena cava in the supine position, reducing venous return to the heart. Symptoms include dizziness, pallor, and hypotension.
Management: Position the patient on her left side, or manually displace the uterus to the left.
Respiratory System:
Increased Tidal Volume and Respiratory Rate: Due to increased oxygen demand and progesterone effects.
Decreased Functional Residual Capacity: Uterus pushing on diaphragm.
Pregnant patients may feel short of breath normally.
Gastrointestinal System:
Slower Gastric Emptying: Increased risk of aspiration during intubation or vomiting.
Increased nausea and vomiting (especially in the first trimester).
Uterine Changes:
The uterus grows significantly, becoming an abdominal organ by the second trimester.
The fundus (top of the uterus) can be palpated at the umbilicus by 20 weeks gestation.
Assessing the Gravid Patient in Emergency
Always remember you are assessing and caring for two patients: the mother and the fetus.
Primary Assessment: Focus on the mother's ABCs (Airway, Breathing, Circulation). A healthy mother is the best chance for a healthy baby.
History Taking:
Last Menstrual Period (LMP) / Gestational Age: Helps determine stage of pregnancy.
Gravida/Para: Number of pregnancies/live births.
Due Date: Expected delivery date.
Prenatal Care: Any complications?
Chief Complaint: Vaginal bleeding, abdominal pain, contractions, fluid leakage, trauma.
Fetal Movement: Has the patient felt the baby move recently?
Physical Exam:
Vital Signs: Interpret with physiological changes in mind (e.g., normal to be slightly hypotensive or tachycardic).
Uterine Assessment: Palpate fundus height, assess for contractions.
Vaginal Bleeding: Note amount, color, and any associated pain. Do NOT perform a vaginal exam in the prehospital setting for bleeding or suspected placental issues.
Common Emergency Conditions in Pregnancy
Vaginal Bleeding: Can indicate miscarriage, placenta previa (placenta covering cervix), or abruptio placentae (placenta separating from uterine wall).
Ectopic Pregnancy: Fertilized egg implants outside the uterus, usually in the fallopian tube. Presents with abdominal pain, often unilateral, and vaginal bleeding. Life-threatening.
Preeclampsia/Eclampsia: Hypertension unique to pregnancy. Preeclampsia includes hypertension, proteinuria, and edema. Eclampsia includes seizures.
Symptoms: Headache, visual disturbances, epigastric pain, hypertension, edema.
Management: Left lateral recumbent position, gentle transport, seizure precautions.
Trauma: Even minor trauma can have significant consequences due to the physiological changes and the presence of the fetus. The uterus and fetus are vulnerable.
Prehospital Management Principles
Prioritize maternal stability, recognize and manage life threats, and ensure rapid transport to an appropriate facility.
Positioning: Left lateral recumbent position (or manually displace uterus) to prevent supine hypotensive syndrome.
Oxygen: Administer high-flow oxygen for any signs of distress or trauma.
IV Access (Advanced Providers): Establish IV access for fluid resuscitation in shock or trauma.
Trauma Management: Manage maternal injuries according to standard trauma protocols, but with consideration for the pregnancy.
Monitor: Continuous monitoring of maternal vital signs and level of consciousness.
Transport: Rapid transport to a facility capable of managing obstetric emergencies.
Critical Thinking Questions
A pregnant patient in her third trimester complains of dizziness and feeling faint while lying on her back. What is the likely cause, and what is your immediate intervention?
Why is it crucial for an EMT to be aware of the physiological changes in the cardiovascular system of a pregnant patient when assessing vital signs?
You are treating a pregnant trauma patient. What is the primary focus of your assessment and management, and why?
A pregnant patient presents with a severe headache, blurred vision, and epigastric pain. What life-threatening condition should you suspect, and how would your management differ?
Discuss the reasons why a vaginal examination should generally be avoided by EMTs in the prehospital setting for a gravid patient with vaginal bleeding.