History of Present Illness
Kristi Wheeler is a 17-year-old female (G1P0) presenting to the ED with her mother, Lynette, for a scheduled medication abortion. They initially had an appointment with Dr. Abbot at 06:30 but overslept and arrived hours later. The patient's last menstrual period (LMP) was approximately the 23rd of June. She denies any known drug allergies and has no prior surgical history.
Emergency Department Course
Initial Provider Assessment & Pre-Procedure Evaluation
Patient evaluation prior to administering abortifacients.
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Initial Provider Assessment & Pre-Procedure Evaluation
Patient evaluation prior to administering abortifacients.
Medical Decision Making
Dr. Collins is taking over care from the off-going Dr. Abbot. Before administering a medication abortion (typically mifepristone followed by misoprostol), Dr. Collins must establish the patient's medical history, assess gestational age via LMP, and verify there are no medical or surgical contraindications. Most critically, an ultrasound must be ordered to confirm an intrauterine pregnancy, date the gestation to ensure it falls within the safe therapeutic window (typically < 70 days), and rule out an ectopic pregnancy.
Diagnostics & Findings
- Clinical history intake
- Pelvic ultrasound
Findings:
- First pregnancy (G1P0)
- LMP: June 23 (approximate)
- No drug allergies
- No prior surgical history
Interventions
- Instructed patient to change into a hospital gown for the pending ultrasound examination.
⮑ Outcome & Reassessment
Patient is cooperative, denies any allergies or past medical issues, and prepares for the ultrasound.
Clinical Media
Diagnostic Imaging (Ultrasound)
Routine pre-medication abortion ultrasound to confirm gestational age.
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Diagnostic Imaging (Ultrasound)
Routine pre-medication abortion ultrasound to confirm gestational age.
Medical Decision Making
Dr. Collins performs an ultrasound and measures the Crown-Rump Length (CRL) at 5.03 cm, which correlates to an Estimated Gestational Age (EGA) of 11 weeks and 2 days. This is a critical inflection point: it means the patient's pregnancy is further along than her LMP suggested. At 11w2d, the patient exceeds the standard FDA-approved 70-day (10-week) limit for outpatient mifepristone/misoprostol regimens. Given the current complex legal landscape around abortion access, Dr. Collins recognizes this finding may cross a strict gestational cutoff, prompting her to recalculate the measurements to be absolutely certain.
Diagnostics & Findings
- Transabdominal Pelvic Ultrasound
Findings:
- Intrauterine pregnancy confirmed.
- CRL: 5.03 cm
- Estimated Gestational Age: 11 weeks, 2 days.
Interventions
- Ultrasound imaging captured; measurements recalculated to ensure diagnostic accuracy.
⮑ Outcome & Reassessment
Patient senses the provider's hesitation and asks 'Is everything okay?'. Dr. Collins replies 'Yeah' to maintain composure while internally processing the complication.
Clinical Media
Diagnoses & Disposition
Evolving Diagnoses
- [S01E04]First Trimester Pregnancy (Pending Ultrasound Confirmation)
- [S01E04]Intrauterine Pregnancy - 11 weeks, 2 days (Exceeds medication abortion limits)
Current Disposition
In the ED Exam Room, pending discussion of ultrasound findings and revised termination options.
Casebook Analysis
Episode Context
Kristi and her mother arrive for a medication abortion but missed their original time slot with Dr. Abbot because they overslept and failed to set an alarm. Dr. Heather Collins steps in to assume care. However, during the routine ultrasound, Dr. Collins discovers the fetus is at 11 weeks and 2 days exceeding typical medication abortion limits. This introduces a significant legal and procedural conflict, raising the stakes of their initial tardiness.
Attending's Review
Medical Accuracy
The protocol demonstrated by Dr. Collins is highly accurate for a clinical or ED setting handling early pregnancy terminations. Before dispensing mifepristone and misoprostol, it is the standard of care to obtain the Last Menstrual Period (LMP), confirm the patient's allergy profile, check surgical history, and perform an ultrasound. The ultrasound is a critical safety measure to confirm the pregnancy is intrauterine (ruling out life-threatening ectopic pregnancy) and to verify gestational dating. The FDA approves mifepristone for use up to 70 days (10 weeks) gestation. Finding a CRL of 5.03 cm correctly correlates to an 11w2d gestation, accurately triggering a clinical pivot and validating the provider's need to double-check her measurements.
Complications & Errors
- Patient non-compliance/delay (missed original 06:30 appointment), which resulted in prolonged wait times and a provider handoff.
- Patient's LMP dating was significantly off, resulting in a true gestational age of 11w2d, complicating the planned medication abortion pathway.
Clinical Pearls
Always obtain a baseline pelvic ultrasound prior to prescribing mifepristone and misoprostol to confirm an intrauterine pregnancy and definitively rule out ectopic pregnancy.
Always rely on ultrasound Crown-Rump Length (CRL) for definitive dating in the first trimester, as patient-reported LMP is frequently inaccurate.
Mechanism of Action: Mifepristone is a competitive progesterone receptor antagonist that causes decidual necrosis, cervical softening, and sensitizes the myometrium. Misoprostol, administered 24-48 hours later, is a synthetic prostaglandin E1 (PGE1) analog that induces strong uterine contractions and cervical ripening to expel the pregnancy.
Indications for Therapeutic Abortion: While many terminations are elective, 'therapeutic' abortions are specifically medically indicated to preserve maternal life or health (e.g., severe preeclampsia, sepsis from premature rupture of membranes, severe cardiovascular disease) or due to lethal fetal anomalies.
The US Legal Landscape & Local Disparities: Following the 2022 Dobbs decision overturning Roe v. Wade, abortion access in the US is highly fragmented, ranging from total state bans to protected access. In Pittsburgh, Pennsylvania, abortion remains legally protected up to 23 weeks and 6 days. However, because the FDA-approved limit for outpatient medication abortion is 10 weeks (70 days), an 11w2d pregnancy necessitates a clinical shift to a procedural abortion (e.g., suction aspiration) highlighting the complex intersection where state law permits the procedure, but pharmacological guidelines restrict the method.
