A patient's case presented in AE, with acute onset of nausea and vomiting for 12 hours, solved by ChatGPT
A 65-year-old woman with a history of
hypertension, hypothyroidism, systemic lupus erythematosus, adrenal
insufficiency, osteopenia, and depression presents to the emergency department
(ED) with acute onset of nausea and vomiting for 12 hours. She reports lightheadedness,
especially when standing. Her medications include amlodipine 5 mg daily,
chlorthalidone 12.5 mg daily, levothyroxine 125 µg daily, hydrocortisone 15 mg
in the morning and 5 mg in the evening, fludrocortisone 0.05 mg 5 days per
week, calcium carbonate 500 mg twice daily, and citalopram 10 mg daily.
When the patient is supine, her blood
pressure is 110/60 mm Hg, and her heart rate is 90 beats per minute. When she
sits up, her blood pressure decreases to 100/60 mm Hg, and her heart rate
increases to 125 beats per minute. Her mucous membranes appear dry, and her
lungs are clear bilaterally. Heart sounds are normal, there is no jugular
venous distention, and her extremities show no edema. A chest radiograph
performed in the ED shows a 1.2-cm nodule in the right upper lung field that
was not present on images obtained 18 months ago.
Laboratory findings are as follows:
|
|
Patient
value |
Reference
range |
|
Hemoglobin
(g/dL) |
15.6 |
12.0–16.0 |
|
Hematocrit
(%) |
45.9 |
36.0–46.0 |
|
Leukocyte
count (per mm3) |
6500 |
4500–11,000 |
|
Platelet
count (per mm3) |
355,000 |
150,000–350,000 |
|
Sodium
(mEq/liter) |
125 |
136–145 |
|
Potassium
(mEq/liter) |
4.3 |
3.5–5.0 |
|
Chloride
(mEq/liter) |
85 |
98–106 |
|
Carbon
dioxide (mEq/liter) |
32 |
21–30 |
|
Blood urea
nitrogen (mg/dL) |
42 |
10–20 |
|
Creatinine
(mg/dL) |
1.4 |
0.6–1.1 |
|
Total
calcium (mg/dL) |
12.5 |
9.0–10.5 |
|
Albumin
(g/dL) |
3.9 |
3.5–5.5 |
|
Glucose
(mg/dL) |
125 |
70–100 |
|
Serum
osmolality (mOsm/kg) |
273 |
285–295 |
|
Urine |
|
|
|
Specific
gravity |
1.031 |
1.001–1.035 |
|
pH |
5.0 |
5.0–9.0 |
|
Sodium
(mEq/liter) |
<20 |
Varies
with intake |
|
Potassium
(mEq/liter) |
60 |
Varies
with intake |
|
Creatinine
(mg/dL) |
100 |
Varies
with intake |
|
Osmolality
(mOsm/kg) |
830 |
Varies
with intake |
Question
In addition to
holding the chlorthalidone and calcium supplement, providing stress doses of
glucocorticoids, and serially reassessing the patient’s clinical condition and
laboratory parameters, which one of the following next steps is most
appropriate for immediate management?
Administer 1 liter of 0.9% sodium chloride intravenously
Increase fludrocortisone to 0.1 mg daily
Administer 100 mL of 3% sodium chloride intravenously
Administer 4 mg of zoledronic acid intravenously
Start
furosemide 40 mg twice daily
Expert's answer:
Administer
1 liter of 0.9% sodium chloride intravenously
Key Learning Point
In a patient with hypotonic hyponatremia associated with volume depletion, treatment should first be aimed at providing adequate fluid volume and establishing euvolemia
ChatGPT <response>Based on the patient's symptoms, history, and
laboratory findings, it appears she is experiencing an adrenal crisis, a
life-threatening condition associated with adrenal insufficiency. The low blood
pressure, high heart rate, and electrolyte abnormalities suggest an acute
adrenal crisis.
The most appropriate immediate
management step is to administer 1 liter of 0.9% sodium chloride intravenously
(IV). This helps
to address the dehydration and hypotension associated with adrenal crisis.
Additionally, holding chlorthalidone and calcium supplements is a reasonable
approach as they might contribute to electrolyte imbalances.
Increasing fludrocortisone or
administering 3% sodium chloride may be considered later, but the priority is
fluid resuscitation with normal saline. Zoledronic acid and furosemide are not
indicated in the acute management of adrenal crisis.
It's crucial to monitor the
patient closely, provide stress doses of glucocorticoids, and continue
reassessing clinical and laboratory parameters.
🌐 Sources
</response>
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