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NPi

Articles in the Bladder Diaries journal tagged NPi, newest first.

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, PT · 25 min read
Hourglass on a wooden desk: NPi captures what fraction of a day's urine arrived overnight, the same fraction shown
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Nocturnal Polyuria Index (NPi): Calculation and Workup

Calculating the nocturnal polyuria index from a bladder diary: age-stratified thresholds, the 4Is gateway, and the PT-led workup before any drug.

Dr. Di Wu, MD, PT · 15 min read
A page of handwritten numbers: the disciplined three-day record a frequency volume chart asks the patient to keep
Bladder diary

Frequency Volume Chart: The ICS-Formal Bladder Diary

A frequency volume chart is the ICS-formal name for the volumetric core of a bladder diary. The chart that produces 24hVV, MVV, AVV, and NPi at the desk.

Dr. Di Wu, MD, PT · 16 min read
Clear graduated measuring glass: turning volume into a calibrated number, the same job a 3-day bladder diary performs
Bladder diary

Normal Capacity of the Bladder: Functional vs Anatomical

The 300-500 mL textbook range is anatomical capacity. The number that drives clinical decisions is functional capacity, read off a 3-day bladder diary.

Dr. Di Wu, MD, PT · 15 min read
Pen, notebook, and smartphone: the bladder diary app evaluation kit a clinician keeps within reach
Bladder diary

Bladder Diary App: A Clinician's Eight-Point Checklist

A clinician's eight-point checklist for evaluating a bladder diary app: ICS-grounded requirements and what gets quietly broken when an app misses one.

Dr. Di Wu, MD, PT · 17 min read