Interestingly, in a study by Al-Safi et al,3 63% of postpartum preeclamptic patients had no antecedent diagnosis of hypertensive disease during pregnancy. These findings are consistent with the findings of others that 33% to 69% of such patients show no evidence of preeclampsia in the ante- or peripartum period.
The clinical presentation of postpartum preeclampsia is similar to preeclampsia complicating pregnancy after gestation week 20. In the study by Al-Safi et al,3 headache was the most common presenting symptom (69%), followed by shortness of breath (30%), blurry vision (21%), nausea (12.5%), and epigastric abdominal pain (5%). Similarly, Yancey et al1 found headache (82%) to be the most common presenting symptom in their series. Unfortunately, it is not known whether the patient in this case complained of headache or blurred vision as the published records note neither their presence nor absence.
The management of patients with preeclampsia includes IV magnesium to prevent seizures (ie, eclampsia) and BP control.1 A bolus of 4 to 6 g IV magnesium sulfate over 15 to 30 minutes is recommended, followed by an infusion of 2 g/h IV. Historically, IV hydralazine has been used to manage preeclamptic patients with a BP greater than 160/110 mm Hg. More recently, however, IV labetalol has become popular.5 All such patients require admission to the hospital with Ob/Gyn involvement.
Missed Subdural Hematoma
A 59-year-old man presented to the ED with a chief complaint of headache, the onset of which he stated started gradually 2 days prior. He noted the headache was worse than normal but without associated nausea, vomiting, fever, chills, or change in vision. His past medical history was significant for a lower extremity deep vein thrombosis 3 months prior, for which he was taking warfarin.
The patient’s vital signs were all normal. The physical examination, including a thorough neurological examination, was also normal. The EP ordered a prothrombin time (PT), an international normalized ratio (INR), and a noncontrast CT scan of the head. The PT/INR results were therapeutic at 22 seconds and 2.3. The CT scan was interpreted by radiology services as normal. The patient’s headache was treated with IV prochlorperazine and diphenhydramine. After treatment, the patient reported feeling better and was discharged home with instructions to follow up with his primary care physician.
Over the next several months, the patient presented to the same ED on seven different occasions, each time with the chief complaint of headache. At each of these presentations, the history and physical examination were documented as unremarkable, with no history of trauma. The thoroughness, however, of the documentation varied considerably for each ED encounter. No head CT scan was ordered on the subsequent seven visits, and at each presentation, the patient was treated symptomatically and discharged home.
Two days after his eighth visit to the same hospital ED, the patient presented to a different ED, again with a chief complaint of headache. The EP at this ED ordered a noncontrast CT of the head, which demonstrated a left subdural hematoma. The patient was admitted to the hospital, given IV vitamin K and fresh frozen plasma, and underwent evacuation of the hematoma by neurosurgery. The patient’s hospital course was unremarkable, and he was discharged home without any focal weakness.
The patient, however, claimed that he suffered cognitive impairment as a result of the missed diagnosis. He sued treating EPs at the first ED as well as the hospital for failure to timely diagnose the subdural hematoma, stating that a CT scan should have been performed at each of his ED visits since he was on warfarin. The defense claimed that a CT scan was not warranted for each visit, and that the timing of when and how the brain bleed started was uncertain. At trial, a defense verdict was returned.
Discussion
It is well known that patients receiving warfarin are at an increased risk for intracranial hemorrhage (ICH) following blunt head trauma.1 The recommendation is that all such patients have a noncontrast CT scan of the head to rule out intracranial bleeding. This is due to the fact that 60% of patients presenting with an immediate traumatic intracranial hemorrhage will have a normal mental status on examination; and 11% will have no history of loss of consciousness, a normal mental status examination, and no physical evidence of trauma above the clavicles.1 In a study by Hart et al,2 subdural hematoma accounted for 44% of all ICH in these types of patients.
More controversial is how to manage patients on warfarin who experience blunt head trauma and have a normal CT scan of the head. Because of the fear for delayed traumatic ICH, many clinicians recommend admitting such patients for neurological observation and repeat head CT scan the next morning.3 Additionally, some clinicians even recommend reversing the warfarin anticoagulation in such patients. 4 These recommendations, though, are based on expert consensus rather than on rigorous, prospective multicenter studies.1 These strategies are also problematic, since such multiple repeat CT scans would not only be incredibly expensive but also would expose the patient to high doses of radiation to the brain. Moreover, the Centers for Medicare and Medicaid Services has now made CT brain scan imaging of patients presenting to the ED with complaint of nontraumatic headache a quality measure they follow. Their goal is to decrease the number of “unnecessary” head CT scans.