Long-Term Effects of a Suprapubic Catheter

Living with a suprapubic catheter (SPC) for months or years introduces a set of ongoing complications that are largely predictable but difficult to fully prevent. The most common long-term effects include recurrent urinary tract infections, catheter blockage from mineral encrustation, bladder stone formation, and bladder spasms. Rarer but more serious consequences include an elevated risk of bladder cancer and, in people with spinal cord injuries, episodes of autonomic dysreflexia. Most of these problems overlap with those seen in urethral catheters, though the balance of risks shifts in meaningful ways that affect daily comfort and medical decision-making.

Why Suprapubic Catheters Are Used Long-Term

An SPC is a tube inserted through the abdominal wall directly into the bladder, bypassing the urethra entirely. It is a common urological procedure typically performed for people who cannot empty their bladder through the urethra, whether because of neurological conditions like spinal cord injury or multiple sclerosis, severe urethral strictures, or pelvic surgery that makes urethral catheterization impossible or unsafe.¹ For many of these patients, the alternative would be major reconstructive surgery. In studies of people with neuropathic bladder dysfunction, suprapubic catheterization has been found to be effective and well tolerated over the long term when major surgery is the only other realistic option.²

Recurrent Infections

Infection is the single most talked-about long-term complication, and for good reason. Having any tube sitting in the bladder creates a highway for bacteria. In one study of SPC users, catheter-associated bacteriuria (bacteria in the urine, with or without symptoms) was found in about 95% of patients, though only around 11% developed a symptomatic urinary tract infection.³ That gap matters: the presence of bacteria alone does not mean you are sick, and treating asymptomatic bacteriuria with antibiotics often does more harm than good by driving resistance. The distinction between colonization and true infection is something clinicians monitor closely over time.

Several factors increase the odds of progressing from harmless colonization to a genuine infection. Longer time since the SPC was placed and leaving a single catheter in place for more than about two weeks both raise infection risk. Extended antibiotic use, somewhat counterintuitively, also increases the chance of developing drug-resistant infections.⁴ In a separate long-term study, about one in five SPC users experienced recurrent urinary tract infections over time.⁵

Biofilm and Encrustation

Behind most catheter blockages and many infections sits a biological process that is hard to stop once it starts: biofilm formation. Within hours of a catheter being placed, bacteria can begin coating its surface in a slimy, mineral-laced film. The chief culprit is a bacterium called Proteus mirabilis, which produces an enzyme that makes urine more alkaline. That alkaline environment causes calcium and magnesium minerals to crystallize directly onto the catheter surface.⁶

Laboratory studies have shown that this process is remarkably hard to outrun with better catheter materials. When researchers tested all-silicone, silicone-coated latex, hydrogel-coated, silver-coated, and even antibiotic-impregnated catheters in bladder models seeded with Proteus mirabilis, all of them developed a crystalline foundation layer of calcium phosphate within hours. By 18 hours, the catheters were densely encrusted with bacterial biofilm.⁷ This encrustation is the main reason catheters block, which in long-term SPC users leads to emergency department visits. One study found that a quarter of long-term SPC patients experienced catheter blockage, and roughly 43% of those required at least one emergency visit to deal with it.⁵

Bladder Stones

When catheter-related encrustation and chronic infection persist, minerals can accumulate not just on the catheter but freely inside the bladder, forming bladder stones. People with chronic indwelling catheters are at elevated risk of bladder calculi and recurrent infections, especially without regular follow-up care.⁸ In extreme cases, stones can grow large enough to encase the catheter tip entirely, making removal impossible without surgical intervention.

A long-term study of spinal cord injury patients found that about 11% of those with suprapubic catheters developed bladder stones, compared to roughly 2% of those using intermittent catheterization. The average time to stone development in SPC users was about five years. Among those who had a stone removed, about 28% developed another one, typically within 14 months, the shortest recurrence interval of any catheter method studied.⁹ Regular imaging and clinical checks are the main strategy for catching stones before they cause a crisis.

Bladder Spasms

Involuntary contractions of the bladder muscle are a frequent source of discomfort for people living with any indwelling catheter. These spasms are triggered by the mechanical irritation of the catheter and its balloon pressing against the bladder wall. They can cause sudden pain, urine leakage around the catheter, and a persistent urgency sensation. Research has shown that reducing the volume of the catheter balloon by half can meaningfully lower pain scores and the severity of catheter-related bladder discomfort. Targeted nursing interventions, including better catheter positioning and proactive pain management, have also been shown to reduce spasm frequency, duration, and severity compared to standard care.¹⁰ Anticholinergic medications are commonly prescribed to manage spasms, though they come with their own side effects, particularly in older adults.

Cancer Risk

This is the complication that gets the least day-to-day attention but carries the highest stakes. Chronic irritation and inflammation of the bladder lining, sustained over many years of catheter use, can promote changes in the bladder wall tissue. Squamous cell carcinoma of the bladder is uncommon in the general population, but it can arise in the setting of long-term bladder catheterization and chronic inflammation.¹¹

A prospective study that biopsied the bladders of 25 spinal cord injury patients who had been catheterized for at least ten years found squamous cell carcinoma in two of them, an 8% rate. The researchers concluded that this high risk of malignancy was “yet another compelling reason to minimize the use of long-term indwelling catheters.”¹² That was a small study, and the true population-level risk is debated, but most urological guidelines now recommend periodic bladder screening (typically cystoscopy) for anyone who has had an indwelling catheter for a decade or more.

Autonomic Dysreflexia in Spinal Cord Injury

For people with spinal cord injuries at or above the mid-thoracic level, an SPC introduces a specific neurological risk. Autonomic dysreflexia is a sudden, dangerous spike in blood pressure triggered by a painful or irritating stimulus below the level of the injury. The most common triggers arise from the lower urinary tract: a blocked catheter causing the bladder to overdistend, a urinary tract infection, or even the routine process of catheter changes or cystoscopy.¹³

Symptoms include a pounding headache, flushing and sweating above the injury level, and a sense of dread. Because the blood pressure elevation can be severe enough to cause a stroke, anyone with a high spinal cord injury who uses an SPC needs a clear action plan. The immediate fix is almost always identifying and removing the stimulus, often by unblocking or replacing the catheter. This is one reason why catheter blockage in SPC users with spinal cord injuries is treated as a more urgent problem than it might otherwise be.

How SPCs Compare to Urethral Catheters

Many people assume that because an SPC avoids the urethra, it avoids the complications of urethral catheters too. The reality is more nuanced. A scoping review comparing long-term SPC use to other drainage methods found that suprapubic catheters are associated with lower rates of urethral injury and stricture, but have similar rates of upper urinary tract damage, reflux of urine toward the kidneys, bladder stones, and symptomatic urinary tract infections.¹⁴ The main problems of blockage, infection, and stone formation occur at similar rates regardless of which route the catheter takes.¹⁵

Where SPCs do shine is comfort and urethral preservation. Patient-reported symptoms consistently show that SPCs are more comfortable and better tolerated than urethral catheters. Urethral complications like strictures, scrotal infections, and urethral erosion are far less common with the suprapubic route. A nursing-home study found that SPC users had a lower rate of catheter-associated UTIs (about 6.6 per 1,000 device-days versus 8.8 for urethral catheters), were roughly half as likely to be hospitalized, and were less likely to have received antibiotics in the previous month. However, the same study found that among residents catheterized for 90 days or more, SPC users had a higher average number of multidrug-resistant organisms isolated than urethral catheter users.¹⁶ That finding is a reminder that fewer infections does not always mean fewer resistant infections.

Kidney Health Over Time

A common worry among people facing years of catheter use is whether it will damage their kidneys. The evidence here is more reassuring than you might expect. A study comparing long-term renal function across different bladder management methods in spinal cord injury patients found very little change in kidney function as the years passed, and no clinically meaningful differences between people using suprapubic catheters, urethral catheters, or intermittent catheterization.¹⁷ That does not mean kidney problems cannot occur, especially if reflux or chronic stones develop, but the catheter type itself does not appear to be the main driver of kidney decline.

Quality of Life and Emotional Impact

Beyond the clinical complications, the day-to-day experience of living with an SPC is shaped by concerns that rarely appear in complication-rate tables. A large survey of over 350 long-term catheter users found an average quality-of-life score of about 4.1 on a 5-point scale (where 5 means no impairment), suggesting a moderate negative impact. The factors that dragged scores down were practical and emotional: fear of urine leakage, worry about urine odor, painful catheter changes, and the anticipation of infections. Younger patients (under 70) and women with SPCs tended to report greater quality-of-life impact than men or older patients.¹⁸

Despite those worries, satisfaction rates are generally high when SPCs are matched to the right patients. A study of people with neurogenic bladder conditions found that about 85% rated their SPC placement as successful, and only around 5% reported a negative outcome overall.¹⁹ One gap in the research, though, is that almost no studies have looked at the effects of long-term SPC use on sexual function or intimacy. A scoping review noted that while users generally report satisfaction with their SPCs, researchers have simply not addressed sexual health outcomes in any meaningful way.¹⁴ For many people living with these devices, that is a significant omission.

Catheter Materials and Change Schedules

How often an SPC needs to be changed and what it is made of both influence the complication profile. Traditional guidance calls for catheter changes every three to four weeks, but the evidence supporting that specific interval is thinner than most people assume. A study of silicone Foley catheters found that extending the interval to up to eight weeks did not increase complication or symptom rates compared to the standard three-week schedule.²⁰ For patients who find catheter changes painful or logistically difficult, this is a meaningful finding, though it should be tailored to the individual’s history of blockage and infection.

Catheter material makes a more dramatic difference to infection rates. A prospective comparison of latex, silicone, and antibiotic-coated catheters found that silicone catheters had a UTI rate roughly a third of the rate seen with latex. Antibiotic-impregnated catheters showed the lowest infection rates of all, with UTIs occurring in under 5% of users compared to nearly 60% with latex.²¹ While antibiotic-coated catheters are not yet standard everywhere, the size of that difference has prompted growing interest in their routine use for people who need long-term drainage.

Tract Loss and Emergency Reinsertion

An underappreciated hazard of daily life with an SPC is accidental dislodgement. The tract between the skin and bladder can close remarkably quickly once the catheter is out, sometimes within hours. If a catheter falls out or is accidentally pulled during a transfer, dressing change, or even sleep, reinsertion needs to happen fast. A study of 1,000 elective SPC procedures highlighted tract loss during routine community catheter changes as a recurring problem, and identified variability in how community nurses handle these situations as an area where better education could improve outcomes.²² If the tract closes completely, the catheter may need to be replaced under imaging guidance or even surgically, turning a minor mishap into a hospital admission.

People who live with SPCs are generally advised to keep a spare catheter and lubricant at home, and to go straight to an emergency department if they cannot reinsert it themselves within a short window. For caregivers, learning how to handle a dislodged catheter is one of the most practically important skills associated with SPC management.

The Placement Procedure and Early Risks

While this article focuses on long-term effects, the initial insertion carries its own risks worth understanding, because some early complications set the stage for chronic problems. Ultrasound-guided insertion is the most common technique and is associated with a relatively low overall complication rate of about 6.5%, with major complications occurring in roughly 1.5% of cases. Patient age has been identified as a risk factor for the more serious complications.²³

The most feared acute complication is bowel injury during insertion, since the catheter must pass through the abdominal wall near loops of intestine. A scoping review of these injuries found that small bowel perforations (primarily of the ileum) are the most common type, followed by colonic injuries. Most patients who were promptly diagnosed recovered fully, but one case of death was attributed to delayed diagnosis.²⁴ Ultrasound guidance has made this complication less common, but it has not eliminated it entirely, which is why the procedure is typically performed by experienced urologists rather than at the bedside.

Drug-Resistant Organisms

The relationship between long-term catheterization and antibiotic resistance deserves its own attention, because it creates a cycle that is hard to break. Each urinary tract infection prompts a course of antibiotics. Each course of antibiotics selects for bacteria that are harder to kill. Over months and years, the organisms colonizing the catheter and bladder become increasingly resistant. Research on SPC users with urethral strictures found that prolonged antibiotic use and longer duration since catheter placement were both independent risk factors for developing multidrug-resistant bacteria.⁴ As noted in the comparison between SPC and urethral catheter users in nursing homes, SPC users catheterized for 90 days or more actually harbored more multidrug-resistant organisms on average than urethral catheter users, despite having fewer overall infections.¹⁶

This is one of the most frustrating paradoxes of long-term catheter care. The strategies that reduce infection, such as choosing SPCs over urethral catheters, do not necessarily reduce resistance. Judicious use of antibiotics, reserving them for true symptomatic infections rather than treating every positive urine culture, is currently the best available approach. The growing availability of antibiotic-coated catheters could change this equation, but long-term resistance data for those devices are still limited.

1
Continence. Understanding suprapubic catheter usage in the Canterbury population
2
Spinal Cord. Long-term suprapubic catheterisation: clinical outcome and satisfaction survey
3
World Journal of Urology. Microbial biofilm formation and catheter-associated bacteriuria in patients with suprapubic catheterisation
4
PubMed. Catheter-associated urinary tract infections in urethral stricture patients indwelling suprapubic catheter: Insights from a retrospective investigation into specific antibiogram and risk factors
5
PubMed Central. The surgical risk of suprapubic catheter insertion and long-term sequelae
6
Spinal Cord. The encrustation and blockage of long-term indwelling bladder catheters: a way forward in prevention and control
7
PubMed. Observations on the development of the crystalline bacterial biofilms that encrust and block Foley catheters
8
PubMed. Suprapubic catheter encasement by bladder stone
9
Spinal Cord. Bladder stones in patients with spinal cord injury: a long-term study
10
PubMed Central. Interventions for the Management of Bladder Spasms in Adults with Indwelling Urinary Catheters: A Nursing Practice-Oriented Systematic Review
11
PubMed Central. Squamous cell carcinoma of the suprapubic tract: A rare presentation in patients with chronic indwelling urinary catheters
12
The Journal of Urology. Incidence of squamous cell carcinoma in patients with long-term catheter drainage
13
World Journal of Urology. Autonomic dysreflexia in urological practice: pathophysiology, prevention and treatment considerations
14
PubMed. Long-term bladder drainage: Suprapubic catheter versus other methods: a scoping review
15
PubMed Central. Update on voiding dysfunction managed with suprapubic catheterization
16
PubMed Central. Indwelling Urethral versus Suprapubic Catheters in Nursing Home Residents: Determining the Safest Option for Long-Term Use
17
PubMed. Comparison of long-term renal function after spinal cord injury using different urinary management methods
18
PubMed Central. Quality of life for wearers of a suprapubic or transurethral bladder catheter as lifelong permanent care
19
PubMed. Quality of life after suprapubic catheter placement in patients with neurogenic bladder conditions
20
PubMed Central. Safe duration of silicon catheter replacement in urological patients
21
PubMed Central. Beyond catheter-associated urinary tract infection: A prospective study of infectious, noninfectious, and psychosocial risks of indwelling catheters
22
PubMed. Suprapubic catheterisation: a study of 1000 elective procedures
23
PubMed Central. Safety of ultrasound-guided percutaneous suprapubic catheter insertion in spinal cord injury patients
24
PubMed Central. Intestinal Injury After Suprapubic Catheterisation: A Scoping Review