NU743 Unit 4 Case Analysis, Postpartum Headache Example

Better Lying Flat, Higher Than It Should Be: A Complex Case Analysis of a Headache Six Days After an Epidural-Assisted Delivery, Worked Overnight at a Critical Access Hospital Without the MR Venogram It Wants

[Student Name]

Purdue University Global

NU743: Clinical Decision-Making and Collaboration

Unit 4 Complex Case Analysis

[Instructor Name]

[Date]

The patient and hospital are composite; vital signs, laboratory values and times are bracketed.

The Presentation

Ms. [P.], [31], delivered her second child vaginally [six] days ago with epidural analgesia; the anesthesia record notes one attempt with no known dural puncture. She came to the emergency department of [Hillview], a [25]-bed critical access hospital, at [2200] with a headache that began [two] days earlier. It is bilateral, frontal and occipital, clearly worse when she sits or stands and better within about fifteen minutes of lying flat. She has mild photophobia and no visual loss. Her blood pressure was [156/100], and [152/98] fifteen minutes later; during pregnancy it had never exceeded [130/80]. Her neurological examination is normal, with no papilledema on fundoscopy.

The Findings Grid

The prompt supplies [15] findings: the positional quality of the headache, its onset on day [four], bilateral location, mild photophobia, no visual loss, blood pressure of [156/100] on two readings, normal pregnancy blood pressures, a normal neurological examination, no papilledema, platelets of [210,000], AST of [28], creatinine of [0.7], trace urine protein, a hemoglobin of [11.2] and the epidural with no known dural puncture.

Each finding was marked against five candidates: postpartum preeclampsia, post-dural puncture headache, cerebral venous sinus thrombosis, reversible cerebral vasoconstriction syndrome and posterior reversible encephalopathy syndrome. Most cells were neutral. The normal platelets, liver enzymes and creatinine argue against severe preeclampsia with organ involvement, but do not exclude preeclampsia itself. The normal neurological examination and absent papilledema make a large venous thrombosis or established encephalopathy less likely, without excluding either. Only three findings discriminated.

The first is the positional quality, which strongly favors post-dural puncture headache, although spontaneous low-pressure headaches and some venous thromboses can be positional. The second is the new hypertension, which favors preeclampsia and is also a risk factor for encephalopathy and vasoconstriction. The third is the timing: onset on day four is late for a dural puncture headache, which usually begins within the first few days, but consistent with postpartum preeclampsia, which can first appear after delivery.

The grid did not produce a diagnosis; it showed that two diagnoses could both be true, and that the dangerous one had to be treated first.

How Common Each Is

Most postpartum headaches are benign. In a prospective cohort of 985 women, 39 percent reported headache after delivery, primary headaches such as tension-type headache and migraine accounted for more than three quarters, and post-dural puncture headache for under five percent (Goldszmidt et al., 2005). Frequency does not decide this case, however, because the blood pressure changes the stakes.

Why the Positional Headache Was Not Allowed to Decide

The positional pattern was the most striking feature of her story, and it would have been easy to stop there. A dural puncture headache is common after neuraxial analgesia, it is treatable, and a clinician who has seen many will recognize it quickly. Three things kept the question open. The anesthesia record noted no known puncture. The onset on day four was later than usual. And the blood pressure, if it reflected preeclampsia, carried a risk of eclamptic seizure that a dural leak does not. Choosing the benign diagnosis because it fit the most memorable finding would have been anchoring on the first pattern recognized. Holding both diagnoses at once, and treating the one that could cause harm tonight, was the safer course.

The Missing Test and What Each Result Would Do

The test the case wants is magnetic resonance imaging with venography, which would show a venous thrombosis, the white matter swelling of encephalopathy, or the smooth dural enhancement of low pressure. The hospital has no MRI, and CT venography needs a radiologist's protocol that is not available until [0800]. A noncontrast head CT at [2300] was normal, which excludes hemorrhage but not early thrombosis. If MR venography in the morning shows a venous thrombosis, the diagnosis becomes clear and anticoagulation would begin; an American Heart Association statement describes MR or CT venography as the key imaging for suspected cerebral venous thrombosis, which is more common in the postpartum period (Saposnik et al., 2024). If it shows dural enhancement and sagging, a dural leak becomes likely. If it is normal, preeclampsia and a primary headache remain.

Working the Case Overnight

Postpartum preeclampsia is defined by the same criteria as preeclampsia in pregnancy, and new-onset headache that does not respond to medication is a severe feature. ACOG recommends magnesium sulfate for seizure prophylaxis in preeclampsia with severe features and prompt treatment of blood pressures in the severe range of 160 systolic or 110 diastolic or higher (American College of Obstetricians and Gynecologists, 2020). Her pressures are below the severe range, but her headache has not improved with [acetaminophen].

The plan therefore treated the most dangerous explainable diagnosis first. I consulted the obstetrician on call by phone at [2320]; we started magnesium sulfate, checked blood pressure every fifteen minutes, and agreed on oral [labetalol] if it reached the severe range. Lying flat relieved her pain, so I did not withhold rest to test the positional pattern. I arranged transfer by morning to the regional hospital for MR venography and review by neurology and anesthesia, since an epidural blood patch would be considered if a dural leak were confirmed.

What Would Change the Plan Before Morning

New focal weakness, a seizure, confusion or visual loss would make the case an emergency requiring immediate transfer, regardless of weather or hour, because each would point to venous thrombosis or encephalopathy. A blood pressure in the severe range would prompt [labetalol]. A headache that became sudden and severe, a thunderclap, would raise reversible vasoconstriction and a bleed.

Outcome

At the regional hospital the next day, MR venography showed no thrombosis and no encephalopathy, and there was mild dural enhancement. Her pressures settled on oral [nifedipine]. The working diagnoses became postpartum preeclampsia and a probable post-dural puncture headache from an unrecognized puncture, the two conditions the grid had shown could coexist. Her headache resolved after an epidural blood patch.

What the Case Teaches

A single discriminating finding can mislead when another points elsewhere. Here the positional headache was real and so was the hypertension, and the correct response was to treat the condition that could cause a seizure while arranging the test that would settle the rest.

References

American College of Obstetricians and Gynecologists. (2020). Gestational hypertension and preeclampsia: ACOG Practice Bulletin, Number 222. Obstetrics & Gynecology, 135(6), e237-e260. https://doi.org/10.1097/AOG.0000000000003891

Goldszmidt, E., Kern, R., Chaput, A., & Macarthur, A. (2005). The incidence and etiology of postpartum headaches: A prospective cohort study. Canadian Journal of Anesthesia, 52(9), 971-977. https://doi.org/10.1007/BF03022061

Saposnik, G., Bushnell, C., Coutinho, J. M., Field, T. S., Furie, K. L., Galadanci, N., Kam, W., Kirkham, F. C., McNair, N. D., Singhal, A. B., Thijs, V., & Yang, V. X. D. (2024). Diagnosis and management of cerebral venous thrombosis: A scientific statement from the American Heart Association. Stroke, 55(3), e77-e90. https://doi.org/10.1161/STR.0000000000000456