Primary Care
Physician perspectives on preventive care, chronic disease management, and evidence-based primary care practice.
Recent Discussions
In SIADH due to malignancy, do you prefer to use free water restriction or salt tablets?
Fluid restriction is usually the first line measure in chronic SIADH. Salt tablets only work at high doses, as SIADH is a water, not a salt problem, and you improve sodium only minimally. Tolvaptan is a very powerful drug, but, as per the package insert, must be started in an inpatient setting. Addi...
How would you work up and manage persistent lymphopenia in an asymptomatic patient?
Simple answer: refer to an immunologist, as this degree of lymphopenia is quite likely to represent a serious immunodeficiency. I would also send a next generation sequencing panel of immunodeficiency/immunoregulatory genes to be in process while awaiting the immunology consultation. Long answer (fr...
Is there utility in monitoring IgE levels in patients with IgG4-RD?
Serum IgE levels are associated with disease extent/severity and risk of relapse in patients with IgG4-RD. In some patients (although this is not true for all patients), IgE decreases following treatment and increases with disease flares. However, some patients who have extreme IgE elevations at bas...
Do you stop tolvaptan below a certain eGFR in a patient with autosomal dominant polycystic kidney disease?
In general, the practical guidelines support continuing tolvaptan until dialysis or transplant (Chebib and Torres, PMID 33705818). There are situations where I will discontinue sooner, either due to apparent lack of benefit, due to precipitous, unexpectedly rapid decline or accelerated decline, or, ...
Given that there are a fair number of myocarditis cases without a troponin elevation, how do you clinically approach the diagnosis of myocarditis?
If clinical suspicion for myocarditis is not based on elevated troponin there needs to be some objective evidence for it. These would be CRP/sed rate/cardiac MR/biopsy. Unlikely to pursue the last step if the first three are all normal.
Would you consider using finerenone for proteinuric CKD associated with type 1 diabetes mellitus?
Yes, although T1DM is off-label for finerenone and there may be issues regarding its approval by prescription drug plans. I would start with an ACEi/ARB for proteinuria in a T1DM patient, then add spironolactone. If the patient develops breast problems on spironolactone, I would switch to eplerenone...
How would you approach a patient with axial spondyloarthritis who develops new-onset proteinuria?
I would approach the workup for proteinuria based on the differential diagnosis with leading etiologies including, acute illness, diabetes, nephrotic syndrome (minimal change disease, FSGS, membranous neuropathy), drug-induced proteinuria, vasculitis, and of course IgA neuropathy. Standard studies i...
Do you use vitamin B6 to help with Keppra irritability?
I am an adult epileptologist and do not routinely prescribe pyridoxine for neuropsychiatric adverse effects of levetiracetam. I do see this done a lot more in the pediatric population, where there is more data than is available in the adult population (though still not of very high quality). Anecdot...
How would you manage a patient pre-operatively with a prolonged PTT that does not correct on mixing, with lupus anticoagulant testing that is abnormal by LA-PTT only?
Not all reagents/assays exhibit the same sensitivity (aka responsiveness) to lupus anticoagulants (LAC). In this case, there is evidence of LAC based on one assay, LA APTT. Often we see prolongation/inhibition in other assays e.g. APTT, but the phospholipid neutralization (PNP) step is not always di...
Are there instances when you would pursue a kidney biopsy in a pregnant patient instead of waiting to perform the procedure post-delivery?
Prior to 20 weeks, consideration of a biopsy shouldn't be different than how we would think about biopsy in a non-pregnant individual. The pregnancy is still pre-viable, and so knowing a diagnosis and treating the disease with the goal of improving the kidney function, and thus the pregnancy, makes ...