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Post-micturition dribble is the last drop left in the urethra after the bladder has already emptied
Bladder diary

Post-Micturition Dribbling: Confirm First

Post-micturition dribble is usually a benign urethral leak, but the same complaint can be overflow from a bladder that never emptied. Here is the differential.

Dr. Di Wu, MD, PT · 9 min read
A bladder scanner, like any precision instrument, is only as trustworthy as the technique that reads it
Bladder diary

How to Use a Bladder Scanner

A bladder scanner returns a number with false confidence: a late, off-midline, or wrong-preset scan manufactures a residual that derails the voiding workup.

Dr. Di Wu, MD, PT · 12 min read
The bladder outlet behaves like a tap: obstruction is resistance at the valve, not weakness in the pump behind it
Bladder diary

Bladder Outlet Obstruction: Prove It

Bladder outlet obstruction is the diagnosis a flow rate cannot make: low flow means a blocked outlet or a weak detrusor, and only pressure-flow separates them.

Dr. Di Wu, MD, PT · 12 min read
The continence mechanism holds against a cough the way a mooring rope holds a boat against the current
Bladder diary

Stress Urinary Incontinence: The Workup

Stress urinary incontinence is the leak you can diagnose from the bladder diary and a cough test, before urodynamics: a clinician's workup, causes to treatment.

Dr. Di Wu, MD, PT · 15 min read
Each looks identical in the carton until you grade them one by one, the discipline urinary urgency demands before treatment
Bladder diary

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, PT · 25 min read
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