A 33-year-old gravida 2, para 1, at 13 weeks and 2 days gestation presents with persistent nausea that worsens when awake and working, is partially relieved by rest, and briefly improves with ginger chews. What is the appropriate history of present illness, review of systems, physical examination, assessment and plan, and three differential diagnoses?

Clinical Documentation for 33-Year-Old G2P1001 at 13+2 Weeks with Persistent Nausea

History of Present Illness (HPI)

This patient requires immediate escalation to pharmacologic therapy with vitamin B6 and doxylamine, as ginger alone is insufficient for persistent symptoms at 13 weeks gestation 1.

Chief Complaint: Persistent nausea at 13 weeks 2 days gestation

HPI Details to Document:

• Onset: When nausea began (typically 4-6 weeks, peaks 8-12 weeks) 1
• Duration: Hours per day feeling nauseated (use PUQE scoring: <1h, 1h, 2-3h, 4-6h, >6h) 1, 2
• Frequency of vomiting: Number of episodes in past 12 hours (0,1-2,3-4,5-6, ≥7) 1
• Retching episodes: Dry heaves without vomiting in past 12 hours 1
• Aggravating factors: Specific triggers (strong odors, certain foods, activity/work) 1
• Relieving factors: Rest, ginger chews (note: only temporary relief)
• Oral intake: Ability to tolerate fluids and solids; any weight loss
• Urinary output: Frequency and color (assess hydration)
• Previous pregnancy history: Any NVP or hyperemesis in first pregnancy 1

Calculate PUQE Score: Maximum 15 points (≤6=mild, 7-12=moderate, ≥13=severe) 1, 2

Review of Systems (ROS)

Critical elements to assess for hyperemesis gravidarum vs. alternative diagnoses:

Constitutional:

• Weight loss (>5% prepregnancy weight suggests HG) 1
• Fever (suggests infection)
• Fatigue, weakness

HEENT:

• Dry mucous membranes (dehydration) 1
• Visual changes (Wernicke encephalopathy concern) 1

Cardiovascular:

• Palpitations, heat intolerance (hyperthyroidism associated with HG) 1
• Orthostatic symptoms (dehydration) 1

Gastrointestinal:

• Abdominal pain location/character (rule out gallstones, pancreatitis) 1
• Heartburn (common but typically later pregnancy) 1
• Constipation
• Hematemesis

Genitourinary:

• Vaginal bleeding (threatened abortion)
• Dysuria (UTI)
• Decreased urine output

Neurologic:

• Confusion, ataxia, nystagmus (Wernicke encephalopathy) 1
• Numbness, tingling (vitamin deficiency) 1

Psychiatric:

• Anxiety, depression (associated with HG; requires mental health support) 1

Physical Examination (PE)

Vital Signs:

• Blood pressure (orthostatic hypotension: drop >20 mmHg systolic or >10 mmHg diastolic) 1
• Heart rate (tachycardia with dehydration)
• Temperature (rule out infection)
• Weight (compare to prepregnancy/prior visit)

General Appearance:

• Distress level, muscle wasting (malnutrition) 1

HEENT:

• Mucous membranes: moist vs. dry 1
• Thyroid: enlargement, nodules

Cardiovascular:

• Tachycardia, regular rhythm

Abdomen:

• Fundal height appropriate for dates
• Right upper quadrant tenderness (gallstones) 1
• Epigastric tenderness

Skin:

• Turgor (tenting suggests dehydration) 1
• Jaundice (liver involvement)

Neurologic:

• Mental status, gait, cranial nerves, nystagmus (Wernicke screening) 1
• Peripheral neuropathy 1

Assessment

Primary Diagnosis: Nausea and Vomiting of Pregnancy (NVP), moderate severity (PUQE score 7-12 range based on persistent symptoms refractory to conservative measures)

Clinical Reasoning: Patient at 13+2 weeks (just past typical peak at 8-12 weeks) with persistent nausea exacerbated by activity, minimally responsive to ginger. No current evidence of dehydration, weight loss >5%, or electrolyte abnormalities that would indicate hyperemesis gravidarum 1. However, early pharmacologic intervention is critical to prevent progression to HG 1.

Differential Diagnoses

1. Hyperemesis Gravidarum (HG)

   • Key distinguishing features: Weight loss >5% prepregnancy weight, dehydration (orthostatic hypotension, decreased skin turgor, dry mucous membranes), electrolyte abnormalities, ketonuria (though not reliable for severity assessment) 1, 2
   • Associated conditions: Hyperthyroidism (40-50% have elevated liver enzymes), multiple gestation, molar pregnancy 1
   • Risk: Can lead to Wernicke encephalopathy if thiamine deficient 1

2. Gestational Thyrotoxicosis

   • Mechanism: Elevated hCG cross-reacts with TSH receptors 1
   • Clinical features: Palpitations, heat intolerance, tremor, weight loss despite adequate intake
   • Workup needed: TSH, free T4 if clinical suspicion 3
   • Note: Self-resolves by week 14-20 in most cases 3

3. Gastrointestinal Pathology (Gallstones, Pancreatitis, Gastritis)

   • Distinguishing features: Localized abdominal pain (RUQ for gallstones, epigastric for pancreatitis/gastritis), pain radiation to back, fever 1
   • Workup: Abdominal ultrasound if persistent RUQ pain, elevated liver enzymes, or lipase 1
   • Pregnancy consideration: Gallstone disease more common in pregnancy due to progesterone effects 1

Plan

Immediate Management - Stepwise Pharmacologic Approach:

First-Line Therapy (Start Now):

• Vitamin B6 (Pyridoxine) 10-25 mg every 8 hours 1
• Doxylamine 10 mg at bedtime, can increase to combination doxylamine 10mg/pyridoxine 10mg (or 20mg/20mg) three times daily 1
  • FDA-approved for persistent NVP refractory to non-pharmacologic therapy 1
  • Safe and well-tolerated 1

Dietary Modifications (Reinforce):

• Small, frequent, bland meals (BRAT diet: bananas, rice, applesauce, toast) 1
• High-protein, low-fat meals 1
• Avoid spicy, fatty, acidic, fried foods 1
• Identify and avoid specific triggers (strong odors, certain activities) 1
• Continue ginger 250 mg capsules four times daily if tolerated 1

If No Improvement in 48-72 Hours - Second-Line Therapy:

• Add H1-antihistamine: Promethazine 12.5-25 mg every 4-6 hours OR dimenhydrinate 50-100 mg every 4-6 hours 1, 2
• Alternative: Metoclopramide 10 mg every 8 hours (caution: extrapyramidal side effects; administer IV slowly over 3 minutes if given parenterally) 1, 2, 4

If Persistent Symptoms - Third-Line Therapy:

• Ondansetron 4-8 mg every 8 hours 1
  • Use as second-line only due to small increased absolute risk of orofacial clefting in first trimester 2
  • Patient is at 13+2 weeks, past critical period for cleft palate (weeks 6-10)
  • More effective than metoclopramide for severe symptoms 1, 5

Laboratory Evaluation (Order Today):

• Complete metabolic panel (electrolytes, BUN, creatinine, glucose, liver enzymes) 1
• Urinalysis (ketonuria present in 40-50% HG but not severity indicator) 1, 2
• TSH, free T4 (if clinical suspicion of thyrotoxicosis) 1
• Consider CBC (assess for anemia, infection)

Monitoring:

• Weight check at each visit
• Daily symptom diary with PUQE scoring 1, 2
• Return precautions: inability to tolerate fluids >24 hours, weight loss >5 lbs, decreased urine output, severe abdominal pain, visual changes, confusion

Hospitalization Criteria (If Develops):

• Dehydration with orthostatic hypotension 1
• Weight loss >5% prepregnancy weight 1
• Electrolyte abnormalities 1
• Inability to tolerate oral intake despite maximal outpatient therapy 1
• Hospital management: IV normal saline with potassium chloride (guided by daily electrolytes), thiamine 100 mg daily x7 days then 50 mg daily (prevent Wernicke/refeeding syndrome), IV antiemetics, consider methylprednisolone 16 mg IV q8h x3 days as last resort (caution in first trimester) 1

Follow-Up:

• Telephone follow-up in 2-3 days to assess response to therapy
• Office visit in 1 week if symptoms persist
• Critical point: Early aggressive treatment prevents progression to HG and improves maternal quality of life 1, 6