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Evidence-based writing on bladder diaries, lower urinary tract symptoms, and pelvic health. Written for clinicians who want to understand what the data actually says.

Each looks identical in the carton until you grade them one by one, the discipline urinary urgency demands before treatment

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Urinary Urgency: Phenotype Before You Prescribe

Urinary urgency masquerades as overactive bladder. Phenotype it on the bladder diary, excluding overflow and fluid imbalance, before reaching for a drug.

Dr. Di Wu, MD, PTJun 8, 2026 · 25 min read

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A steady stream shows the flow but not the force behind it, the core ambiguity in uroflowmetry interpretation
Bladder diary

Uroflowmetry Interpretation in Context

Uroflowmetry interpretation for clinicians: read flow curve, Qmax, and voided volume against the bladder diary and PVR, because a low Qmax is ambiguous.

Dr. Di Wu, MD, PT · 17 min read
Magnifying glass on documents: the close-reading discipline ICD-10 bladder outlet obstruction coding demands
Bladder diary

Bladder Outlet Obstruction ICD-10: N40.1 vs N32.0 vs N13.9

Bladder outlet obstruction ICD-10 coding: N40.1 for BPH, N32.0 for bladder-neck, N13.9 for unspecified, plus female BOO and post-prostatectomy stacks.

Dr. Di Wu, MD, PT · 27 min read
Decaying oscillations on graph paper: the cystometrogram pattern that names phasic detrusor overactivity
Bladder diary

Detrusor Overactivity: Diary First, Then Urodynamics

Detrusor overactivity is a UDS finding, not OAB. The bladder diary triages most cases before urodynamics; subtype changes which prescription works.

Dr. Di Wu, MD, PT · 28 min read
Clinician downloading a structured bladder diary export for ingestion into the patient EMR
Bladder diary

Exporting a Bladder Diary to Epic, Cerner, and Other EMRs

How to send Bladder Diaries results into the patient chart with FHIR R4 Bundle or HL7 C-CDA R2.1, without any patient data leaving the device until you press download.

Dr. Di Wu, MD, PT · 14 min read
A handwritten inventory ledger: the same audit-defensible classification work that ICD-10 codes for urinary urgency perform
Bladder diary

ICD-10 Codes for Urinary Urgency: LUTS by 4Is Bucket

ICD-10 codes for urinary urgency: R39.15 for the symptom, N32.81 for OAB syndrome, N39.41 with leakage. The LUTS code menu organized by IPC 4Is buckets.

Dr. Di Wu, MD, PT · 24 min read
Pocket watch gears: the bladder's contractile mechanism is the difference between BPH and underactive bladder
Bladder diary

Underactive Bladder: A Diary-First Workup Before Urodynamics

Underactive bladder hides under BPH. The diary plus PVR is what tells you which bucket the patient sits in before urodynamics confirms it. Workup guide.

Dr. Di Wu, MD, PT · 20 min read
What remains in the glass after pouring is what post-void residual measures in the bladder after voiding
Bladder diary

Post-Void Residual: The Voiding-Impairment Gate-Check

Post-void residual is the singular gate-check on the Voiding axis: cutoffs, measurement pitfalls, the kegel caution, and the practical urology algorithm.

Dr. Di Wu, MD, PT · 24 min read
A vintage scale reads a number from a calibrated face: the same job the ICIQ-OAB does for OAB symptom severity
Bladder diary

ICIQ-OAB: Item-by-Item Interpretation for the 4Is Workup

The ICIQ-OAB scores OAB symptom severity 0 to 16. The four items map to four IPC 4Is workup paths. How to read it, score it, and pair it with the diary.

Dr. Di Wu, MD, PT · 18 min read