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Intermittent Catheterization (CIC)

• Avoids UTI, which are caused by overdistension and retained urine, not bacteruria
• Patient/caregiver needs to be able to perform
• Can be clean, aseptic, or sterile, can rinse, wash with soap, boil, or microwave
• Maintain bladder volumes < 400-500mL
• Infection prevention: consider nightly instillation of 50mL 2% betadyne or antibiotic solutions (480mg gentamicin in 1L NS, instill 30mL)

Longterm Catheterization

• Indications: consider when unwilling/unable to perform CIC and unable to adequately empty bladder
• SPT vs urethra: SPT has lower risk for UTI, epididymitis, and urethral stricture, allows preservation of sexual function
• Bladder cancer risk 8-10%, recommend annual cystoscopy starting 5-10yrs after catheterization begins
• Purple bag syndrome: indoxyl sulfate (tryptophan metabolite) excreted in urine, bacteria with phosphatase/sulfase enzyme (rare) convert it to blue/red colors, concentrated in tubing and bag creating purple/blue bag, more common in constipated and elderly patients
• Frequency of exchanges: per CMS, no need to exchange "unless there's an issue," most people exchange monthly due to convenience

Suprapubic Catheterization

• Indications: urethral obstruction/stricture, urinary retention, longterm neurogenic bladder management
• Avoid placement if overlying bowel or prior pelvic surgeries (can confirm with CT pelvis), hx bladder cancer (concern for tract seeding), or anticoagulated
• Benefits: easier to change, easier to manage, allows for sexual activity, 89% patients prefer SPT over prior urethral catheter, no difference in UTI risk but decreased risk of prostatitis/epididymoorchitis, decreased risk of urethrovaginal fistula or traumatic hypospadias
• Placement techniques: can use punch trocar, dilating trocar over wire, or cope loop over wire
• Lowsley retractor: modified urethral sound, place into bladder and push up against abdominal wall then incise down onto retractor, grasp catheter and pull into bladder
• If high risk for bowel injury, can place via cut-down technique
• Placement complications: bleeding (2%), infection (9%), malposition (3%), bowel injury (2.5%), mortality (0.8-1.8%), ureteral obstruction (rare), bladder perforation (rare)

Common catheter complications (urethral and suprapubic)

• Acutely not draining: check bladder scan (may not be draining), flush to remove debris/clots, ensure flushes/aspirates, consider replacing catheter (ensure placement in bladder)
• Chronic clogging: exchange tube monthly or more frequently, consider daily/BID saline flushes, can consider renacidin irrigation, maintain fluid intake (dilute urine), consider citric-acid containing beverages to acidify urine (prevents precipitation in alkaline urine), consider cystoscopy or ultrasound to assess for bladder stones (may not show up on XR), minimal benefit to upsizing catheter, make sure catheter bag allows catheter to drain with gravity
• Peri-catheter leakage: confirm tube is draining, consider anticholinergics, avoid upsizing (stretches out SPT tract)
• Bladder infections: only treat if clinically significant (do not treat asymptomatic bacteruria), exchange tube more frequently, consider CIC, consider methenamine (only for CIC)
• SPT discharge: greenish discharge may be local S. aureus infection, no treatment required but can manage with daily betadyne wipe, granulation tissue can be treated with silver nitrate swabs
• Bladder stone: usually secondary to UTI and stasis, seen in 40-50% catheter blockages
• Erosion: irreversible, traumatic hypospadias seen in men (no treatment required), bladder neck erosion with urethrovaginal fistula seen in women (requires closure or PVS to prevent persistent leakage with SPT placement)
• Unable to remove: can cut balloon port (may be malfunctioning), inject mineral oil and wait 5-10min (helps loosen balloon), try to remove with gentle traction (balloon may not be 100% deflated but will come out), can try popping with superstiff wire via balloon port, do not overinflate (can leave balloon parts in bladder), can puncture via suprapubic route (male) or transurethral/vaginal route (female) under ultrasound guidance, may require surgical removal if large encrustation on catheter

Condom catheters

• Indications: patients with poor mobility and/or incontinence and otherwise able to completely empty bladder
• Benefits: lower rates of UTI and death compared to indwelling catheter, better QoL
• Complications: allergic reactions, skin maceration/breakdown, penile edema, rarely cause pressure necrosis and urethral injury, UTI risk increases if catheter not changed daily
• Can consider malleable penile prosthesis placement to prevent device from falling off, 5% infection rate, 8% explant rate