Preliminary Assessment of an Older Male with Lower Urinary Tract Symptoms, and When to Refer to a Urologist

Benign prostatic hyperplasia is inexorably linked with ageing and is a major contributing factor in the development of lower urinary tract symptoms (LUTS); the prevalence of BPH-related symptoms may be as high as 50% in multinational surveys.

LUTS are not synonymous with BPH — they may arise from the bladder (overactivity or underactivity), prostate, urethra, or from systemic disease and drugs.

Voiding (obstructive) symptoms: hesitancy, weak stream, straining, intermittency, terminal dribbling, incomplete emptying. Storage (irritative) symptoms: frequency, urgency, nocturia, urgency incontinence. Post-micturition: post-void dribbling.

Use the International Prostate Symptom Score (IPSS) / AUA Symptom Index — seven items scored 0–5: 0–7 mild, 8–19 moderate, 20–35 severe — plus the disease-specific quality-of-life (“bother”) question.

The score quantifies symptoms over time; bother and quality of life, not the score alone, drive treatment decisions.

A 3-day frequency-volume chart (bladder diary) distinguishes polyuria, nocturnal polyuria and reduced functional bladder capacity — critical in the older man with nocturia.

Exclude other causes by history: type 2 diabetes (nocturia with polyuria >3 litres), neurological disease (neurogenic bladder), gross haematuria or bladder pain (tumour or calculi), urethral trauma, urethritis or instrumentation (stricture), family history of BPH or prostate cancer, and sexual dysfunction-related LUTS.

Drug history is essential — anticholinergics impair bladder function, sympathomimetics increase outflow resistance, diuretics increase frequency, opioids cause retention, and calcium-channel blockers worsen emptying.

Assess fluid, caffeine and alcohol intake, and evening fluid timing.

Digital rectal examination to assess prostate size and consistency and to detect nodules or induration suggesting carcinoma; also assess rectal sphincter tone, and exclude faecal impaction.

Abdominal examination for a palpable bladder (chronic retention), and examination of the external genitalia for meatal stenosis and phimosis.

Focused neurological examination, including perineal sensation and sacral reflexes.

A general health and cognitive status evaluation is useful for choosing the best treatment, especially if a surgical procedure may be required — frailty, cognition and life expectancy determine what is appropriate. Dementia and other neurological conditions can themselves affect the urinary condition.

Urinalysis in all patients, to detect infection and haematuria; urine cytology is helpful when irritative symptoms or haematuria predominate, especially in smokers, to exclude bladder tumour.

Serum creatinine is not routinely indicated in the initial evaluation of LUTS attributable to BPH, since baseline renal impairment is no commoner in men with BPH than in age-matched peers — but measure it if there is chronic retention, hydronephrosis, or suspicion of obstructive nephropathy.

PSA remains controversial but is still recommended after counselling, and is chiefly appropriate where life expectancy exceeds 10 years and a diagnosis of cancer would change management. Remember: PSA is not cancer-specific and rises in BPH, prostatitis, instrumentation and retention, and about 25% of men with prostate cancer have a PSA of 4.0 ng/mL or less.

Post-void residual urine by bladder ultrasound and uroflowmetry are optional but useful; a poor maximum flow rate, high post-void residual and greater symptom severity predict clinical progression.

Do not perform routine upper-tract imaging, cystoscopy or urodynamics at the preliminary assessment.

Refer urgently for: visible (gross) haematuria or persistent microscopic haematuria without infection; abnormal DRE (nodule or induration) or unexplained PSA elevation; and suspected malignancy.

Refer for: acute or chronic urinary retention with a palpable bladder, renal impairment or hydronephrosis attributable to obstruction, bladder or urethral stones, suspected urethral stricture (previous trauma, urethritis or instrumentation), and recurrent urinary tract infection or persistent sterile pyuria.

Refer for: failure of adequate medical therapy, severe bothersome symptoms in a man fit for and wishing to consider intervention, suspected neurogenic bladder, and any patient in whom surgery is being contemplated (complex urodynamic testing is essential before surgical intervention and to define the cause of retention).

Manage in primary care / general geriatric clinic: mild symptoms (IPSS <7) with watchful waiting and lifestyle measures — fluid restriction before bedtime, avoiding caffeine and spicy food, monitoring diuretics, timed voiding and bladder retraining, pelvic floor exercises, and treating constipation. Patients with mild symptoms but severe bother should undergo further assessment.