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4Is framework

Articles in the Bladder Diaries journal tagged 4Is framework, newest first.

A canal lock holds the water until the gate opens on a deliberate decision, the way a trial of void holds the catheter until the bladder can empty on its own
Bladder diary

Trial of Void Protocol After Surgery

A trial of void protocol is a catheter-removal decision with a pass number, not a checklist: thresholds, methods, and the surgery-by-surgery retention map.

Dr. Di Wu, MD, PT · 17 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
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
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
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
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
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