Sterilization Practices to Prevent Catheter-Associated Infections

MRSA and Healthcare-Associated Infections

Methicillin-resistant Staphylococcus aureus (MRSA) is a bacterium resistant to several antibiotics, posing a significant threat in healthcare and community settings. A substantial proportion of MRSA infections in the community occur on the skin, but the infection can progress to alarming presentations including bloodstream infections, surgical site infections, and pneumonia in healthcare facilities. Research shows that approximately one in three individuals carry staph bacteria in the nose, though most remain asymptomatic. However, about 2 percent of the population carries MRSA, creating a substantial reservoir for transmission.

Any person can contract MRSA through direct contact with an infected wound or by sharing personal items such as razors or towels. The risk of infection increases in situations involving crowded environments or frequent skin contact, such as in daycare settings, military barracks, and athletic facilities. While MRSA skin infections can be treated through drainage or antibiotics, patients must seek professional care rather than attempting self-treatment, which risks further spread of infection.

Infection Control Surveillance and Prevention

Healthcare-associated infections (HAIs) are acquired when patients receive treatment for other conditions in healthcare facilities. These infections are both deadly and costly, but preventable. Approximately 5 percent of hospitalized patients develop HAIs, including intravenous (IV) catheter-associated bloodstream infections (CA-BSIs). The United States experiences approximately 250,000 CA-BSIs annually, with around 80,000 occurring in intensive care units. Each infection episode can cost approximately $25,000 in treatment, extend patient hospital stays by 6–22 days, and carries a mortality rate of 12–25 percent.

The foundational evidence for infection prevention comes from the Efficacy of Nosocomial Infection Control (SENIC) study conducted in 1980, which demonstrated that HAIs could be prevented through infection control practices and surveillance for nosocomial infections. This landmark finding established infection control as a key responsibility for healthcare practitioners and epidemiologists. Because HAIs lengthen patient stays and increase healthcare expenditures, the Centers for Medicare and Medicaid Services (CMS) implemented a strategy to withhold reimbursement for certain HAIs, including catheter-associated urinary tract infections (CA-UTIs) and central line-associated bloodstream infections (CLABSIs). This regulatory approach mandated that institutions establish surveillance programs directed by infection preventionists and hospital epidemiologists to detect infections early and develop prevention strategies.

The landscape of infection prevention oversight involves multiple stakeholders with sometimes conflicting recommendations. The CDC recommends locally driven MRSA surveillance strategies and does not advocate for routine MRSA surveillance cultures. In contrast, the Society for Healthcare Epidemiology of America (SHEA) recommends obtaining MRSA cultures from high-risk patients upon admission and periodically thereafter—guidance that remains controversial given ongoing debate about MRSA surveillance effectiveness. Despite this controversy, the Department of Veterans Affairs has mandated MRSA surveillance across its facilities, and the CMS is considering withholding reimbursement for MRSA infections. These competing directives reflect the challenge of balancing evidence-based recommendations with regulatory mandates and practical implementation in diverse healthcare settings.

Catheter Minimization Strategies

CAUTI prevention did not receive top priority in many acute-care hospitals until the 2008 CMS regulation that halted reimbursement for these infections, prompting widespread institutional action. A survey by Saint and colleagues found that no single prevention strategy had achieved wide adoption across hospitals, and troublingly, more than 50 percent of hospitals were not even monitoring which patients were using urinary catheters or the duration of catheter use. This gap in surveillance represents a critical barrier to infection reduction.

Limiting catheter use or minimizing the duration of catheterization is the primary prevention strategy for CAUTI. SHEA and Infectious Diseases Society of America (IDSA) guidelines recommend considering alternatives to indwelling catheters, such as condom catheters or intermittent in-and-out catheterization. Condom catheters are more comfortable and limit bacterial entry for male patients without dementia. Suprapubic catheters also result in lower bacterial infection rates. Portable bladder ultrasound scanners can accurately measure even small urine volumes and reduce reliance on indwelling catheterization for residual volume assessment. One hospital achieved a 30–50 percent reduction in CAUTI rates over 12 months by implementing portable bladder scanners, and approximately 30 percent of U.S. hospitals have since adopted this technology. These findings demonstrate that catheter minimization, supported by accessible alternatives and monitoring tools, can substantially reduce infection risk.

Evidence-Based Sterilization Practices

Prevention of HAIs enhances overall patient safety. Recent years have seen an increase in clinical guidelines, systematic reviews, meta-analyses, and evidence-based recommendations to help clinicians and policymakers prevent HAIs. However, successful implementation depends on understanding the perspectives of those advocating for these recommendations. When a recommendation is grounded in weak evidence yet championed by sector experts, uptake is likely to be low. Therefore, assessing how healthcare professionals perceive the strength of evidence supporting infection prevention practices is essential to implementation success.

A nationwide survey of infection prevention personnel identified practices viewed by professionals as having strong evidence. These include aseptic urinary catheter insertion, alcohol-based hand rub, chlorhexidine for skin antisepsis prior to central venous catheter insertion, avoidance of the femoral site for central venous catheter placement, maximal sterile barriers during central venous catheter insertion, and semi-recumbent positioning of ventilated patients. At least 90 percent of survey respondents rated these practices as having strong supporting evidence, indicating broad professional consensus on their value.

Infection control represents a cornerstone of clinical practice management given its importance to patient, healthcare worker, and community safety. With increasing public concern about HAIs, antibiotic-resistant bacteria, and their global spread, this area has become a major policy focus. An estimated 4–10 percent of hospitalized patients develop HAIs across surveyed countries, regardless of infection type. The most effective approach to reducing transmission is a multi-faceted program incorporating the latest evidence-based standards, healthcare worker training, and continuous monitoring. Evidence-based practice integrates patient values, clinical expertise, and the best available research evidence. Healthcare facilities group best practices into "care bundles"—typically 3–5 specific, evidence-based practices that, when reliably performed together, improve patient outcomes. The major challenge facing health facilities is the consistent and timely implementation of these bundles and integration of prevention measures into daily workflows.