National trends in the frequency of bladder catheterization and physician-diagnosed catheter-associated urinary tract infections: Results from the Medicare Patient Safety Monitoring System

Validation of measures for perioperative urinary catheter use, urinary retention, and urinary catheter-related trauma in surgical patients

BACKGROUND

The effects of non-infectious urinary catheter-related complications such as measurements of indwelling urinary catheter overuse, catheter-related trauma, and urinary retention are not well understood.

METHODS

This was a retrospective cohort study of 200 patients undergoing general surgery operations. Variables to measure urinary catheter use, trauma, and retention were developed, then surgical cases were abstracted. Inter- and intra-rater reliability were calculated for measure validation.

RESULTS

129 of 200 (65%) had an indwelling urinary catheter placed at the time of surgery. 32 patients (16%) had urinary retention, and variation was observed in the treatment of urinary retention. 12 patients (6%) had urinary trauma. Rater reliability was high (>90% agreement for all) for the dichotomous outcomes of urinary catheter use, urinary catheter-related trauma, and urinary retention.

CONCLUSIONS

This study suggests a persistent high rate of catheter use, significant rates of urinary retention and trauma, and variation in the management of retention.

Temporal trends in postoperative and ventilator-associated pneumonia in the United States

OBJECTIVE

To determine change in rates of postoperative pneumonia and ventilator-associated pneumonia among patients hospitalized in the United States during 2009-2019.

DESIGN

Retrospective cohort study.

PATIENTS

Patients hospitalized for major surgical procedures, acute myocardial infarction, heart failure, and pneumonia.

METHODS

We conducted a retrospective review of data from the Medicare Patient Safety Monitoring System, a chart-abstraction-derived database including 21 adverse-event measures among patients hospitalized in the United States. Changes in observed and risk-adjusted rates of postoperative pneumonia and ventilator-associated pneumonia were derived.

RESULTS

Among 58,618 patients undergoing major surgical procedures between 2009 and 2019, the observed rate of postoperative pneumonia from 2009-2011 was 1.9% and decreased to 1.3% during 2017-2019. The adjusted annual risk each year, compared to the prior year, was 0.94 (95% CI, 0.92-0.96). Among 4,007 patients hospitalized for any of these 4 conditions at risk for ventilator-associated pneumonia during 2009-2019, we did not detect a significant change in observed or adjusted rates. Observed rates clustered around 10%, and adjusted annual risk compared to the prior year was 0.99 (95% CI, 0.95-1.02).

CONCLUSIONS

During 2009-2019, the rate of postoperative pneumonia decreased statistically and clinically significantly in among patients hospitalized for major surgical procedures in the United States, but rates of ventilator-associated pneumonia among patients hospitalized for major surgical procedures, acute myocardial infarction, heart failure, and pneumonia did not change.

Risks and benefits of urinary catheterisation during inpatient diuretic therapy for acute heart failure: a retrospective, non-inferiority, cohort study

Objectives

Patients with acute congestive heart failure (HF) regularly undergo urinary catheterisation (UC) at hospital admission. We hypothesised that UC has no clinical benefits with regard to weight loss during inpatient diuretic therapy for acute congestive HF and increases the risk of urinary tract infection (UTI).

Design

Retrospective, non-inferiority study.

Setting

Geneva University Hospitals’ Department of Medicine, a tertiary centre.

Participants

In a cohort of HF patients, those catheterised within 24 hours of diuretic therapy (n=113) were compared with non-catheterised patients (n=346).

Primary and secondary outcome measures

The primary endpoint was weight loss 48 hours after starting diuretic therapy. Secondary endpoints were time needed to reach target weight, discontinuation of intravenous diuretics and resolution of respiratory failure. Complications included the time to a first UTI, first hospital readmission and death.

Results

A total of 48-hour weight loss was not statistically different between groups and the adjusted difference was below the non-inferiority boundary of 1 kg (0.43 kg (95% CI: −0.03 to 0.88) in favour of UC, p<0.01 for non-inferiority). UC was not associated with time to reaching target weight (adjusted HR 1.0; 95% CI: 0.7 to 1.5), discontinuation of intravenous diuretics (aHR 0.9; 95% CI: 0.7 to 1.2) or resolution of respiratory failure (aHR 1.1; 95% CI: 0.5 to 2.4). UC increased the risk of UTI (aHR 2.5; 95% CI: 1.5 to 4.2) but was not associated with hospital readmission (aHR 1.1; 95% CI: 0.8 to 1.4) or 1-year mortality (aHR 1.4; 95% CI: 1.0 to 2.1).

Conclusion

In this retrospective study, with no obvious hourly diuresis-based diuretic adjustment strategy, weight loss without UC was not inferior to weight loss after UC within 24 hours of initiating diuretic treatment. UC had no impact on clinical improvement and increased the risk of UTI. This evidence, therefore, argues against the systematic use of UC during a diuretic therapy for HF.

Rates of Adverse Events in Hospitalized Patients After Summer-Time Resident Changeover in the United States: Is There a July Effect?

OBJECTIVES

This study aimed to determine whether patients in teaching hospitals are at higher risk of suffering from an adverse event during the summer trainee changeover period.

METHODS

We performed a retrospective analysis of data from the Medicare Patient Safety Monitoring System, a medical-record abstraction-based database in the United States. Hospital admissions from 2010 to 2017 for acute myocardial infarction, heart failure, pneumonia, or a major surgical procedure were studied. Admissions were divided into nonsurgical (acute myocardial infarction, heart failure, or pneumonia) and surgical. Adverse event rates in July/August were compared with the rest of the year. Hospitals were stratified into major teaching, minor teaching, or nonteaching. Results were adjusted for patient demographics, comorbidities, and hospital characteristics. Outcomes were the adjusted odds of having at least 1 adverse event in July/August versus the rest of the year.

RESULTS

We included 185,652 hospital admissions. The adjusted odds ratios (ORs) of suffering from at least one adverse event in a major teaching hospital in July/August was 0.83 (95% confidence interval [CI], 0.69-0.98) for nonsurgical patients and 1.09 (95% CI, 0.84-1.40) for surgical patients. In minor teaching hospitals, the adjusted ORs were 0.96 (95% CI, 0.88-1.04) for nonsurgical patients and 0.99 (95% CI, 0.87-1.12) for surgical patients. In nonteaching hospitals, the adjusted ORs were 0.98 (95% CI, 0.91-1.06) for nonsurgical patients and 1.10 (95% CI, 0.96-1.24) for surgical patients.

CONCLUSIONS

Patients admitted to teaching hospitals in July/August are not at increased risk of adverse events. These findings should reassure patients and medical educators that patients are not excessively endangered by admission to the hospital during these months.

Time Trends in Patient Characteristics and In-Hospital Adverse Events for Primary Total Knee Arthroplasty in the United States: 2010-2017

Background

Perioperative care for total knee arthroplasty (TKA) has improved over time. We present an analysis of inpatient safety after TKA.

Methods

14,057 primary TKAs captured by the Medicare Patient Safety Monitoring System between 2010 and 2017 were retrospectively reviewed. We calculated changes in demographics, comorbidities, and adverse events (AEs) over time. Risk factors for AEs were also assessed.

Results

Between 2010 and 2017, there was an increased prevalence of obesity (35.1% to 57.6%), tobacco smoking (12.5% to 17.8%), and renal disease (5.2% to 8.9%). There were reductions in coronary artery disease (17.3% to 13.4%) and chronic warfarin use (6.7% to 3.1%). Inpatient AEs decreased from 4.9% to 2.5%, (P < .01), primarily driven by reductions in anticoagulant-associated AEs, including major bleeding and hematomas (from 2.8% to 1.0%, P < .001), catheter-associated urinary tract infections (1.1% to 0.2%, P < .001), pressure ulcers (0.8% to 0.2%, P < .001), and venous thromboembolism (0.3% to 0.1%, P = .04). The adjusted annual decline in the risk of developing any in-hospital AE was 14% (95% confidence interval [CI] 10%-17%). Factors associated with developing an AE were advanced age (odds ratio [OR] = 1.01, 95% CI 1.00-1.01), male sex (OR = 1.21, 95% CI 1.02-1.44), coronary artery disease (OR = 1.35, 95% CI 1.07-1.70), heart failure (OR = 1.70, 95% CI 1.20-2.41), and renal disease (OR = 1.71, 95% CI 1.23-2.37).

Conclusions

Despite increasing prevalence of obesity, tobacco smoking, and renal disease, inpatient AEs after primary TKA have decreased over the past several years. This improvement is despite the increasing complexity of the inpatient TKA population over time.

Urosepsis in Older Adults: Epidemiologic Trends in Florida

The incidence and geographic distribution of urosepsis, a life-threatening condition in older adults, is not well understood. The Florida State Inpatient Databases (2012-2014) showed an increase in the incidence of community-acquired urosepsis (5.37 to 6.16 per 1000), particularly among Hispanic older adults residing in low socioeconomic, urban areas with large numbers of nursing homes. These findings suggest a state policy is needed to address community-based preventative care and education for early detection of urosepsis in low-income urban areas. It is important for local health departments to partner with nursing homes to address disparities in care that disproportionally impact Hispanics.

Association Between Medicare Expenditures and Adverse Events for Patients With Acute Myocardial Infarction, Heart Failure, or Pneumonia in the United States

IMPORTANCE

Studies have shown that adverse events are associated with increasing inpatient care expenditures, but contemporary data on the association between expenditures and adverse events beyond inpatient care are limited.

OBJECTIVE

To evaluate whether hospital-specific adverse event rates are associated with hospital-specific risk-standardized 30-day episode-of-care Medicare expenditures for fee-for-service patients discharged with acute myocardial infarction (AMI), heart failure (HF), or pneumonia.

DESIGN, SETTING, AND PARTICIPANTS

This cross-sectional study used the 2011 to 2016 hospital-specific risk-standardized 30-day episode-of-care expenditure data from the Centers for Medicare & Medicaid Services and medical record-abstracted in-hospital adverse event data from the Medicare Patient Safety Monitoring System. The setting was acute care hospitals treating at least 25 Medicare fee-for-service patients for AMI, HF, or pneumonia in the United States. Participants were Medicare fee-for-service patients 65 years or older hospitalized for AMI, HF, or pneumonia included in the Medicare Patient Safety Monitoring System in 2011 to 2016. The dates of analysis were July 16, 2017, to May 21, 2018.

MAIN OUTCOMES AND MEASURES

Hospitals' risk-standardized 30-day episode-of-care expenditures and the rate of occurrence of adverse events for which patients were at risk.

RESULTS

The final study sample from 2194 unique hospitals included 44 807 patients (26.1% AMI, 35.6% HF, and 38.3% pneumonia) with a mean (SD) age of 79.4 (8.6) years, and 52.0% were women. The patients represented 84 766 exposures for AMI, 96 917 exposures for HF, and 109 641 exposures for pneumonia. Patient characteristics varied by condition but not by expenditure category. The mean (SD) risk-standardized expenditures were $22 985 ($1579) for AMI, $16 020 ($1416) for HF, and $16 355 ($1995) for pneumonia per hospitalization. The mean risk-standardized rates of occurrence of adverse events for which patients were at risk were 3.5% (95% CI, 3.4%-3.6%) for AMI, 2.5% (95% CI, 2.5%-2.5%) for HF, and 3.0% (95% CI, 2.9%-3.0%) for pneumonia. An increase by 1 percentage point in the rate of occurrence of adverse events was associated with an increase in risk-standardized expenditures of $103 (95% CI, $57-$150) for AMI, $100 (95% CI, $29-$172) for HF, and $152 (95% CI, $73-$232) for pneumonia per discharge.

CONCLUSIONS AND RELEVANCE

Hospitals with high adverse event rates were more likely to have high 30-day episode-of-care Medicare expenditures for patients discharged with AMI, HF, or pneumonia.

Catheter-Associated Urinary Tract Infections among Trauma Patients: Poor Quality of Care or Marker of Effective Rescue?

Background: Catheter-associated urinary tract infection (CAUTI) is associated generally with worse outcomes among hospitalized patients, but the impact of CAUTI on clinical outcomes is poorly described in trauma patients. We hypothesized that trauma patients with CAUTI would have worse outcomes such as longer length of stay (LOS), fewer discharges to home, and higher outcome of death. Methods: Patients with LOS >2 d in the 2016 Trauma Quality Improvement Program (TQIP) database were included. Patients with and without CAUTI were matched 1:1 via a propensity score using patient, injury, and hospital factors as covariates. Matched pair analysis was performed to compare difference in clinical outcomes between patients with and without CAUTI. Results: There were 238,274 patients identified, of whom 0.7% had a diagnosis of CAUTI. Prior to matching, CAUTI patients had a higher mortality rate (6.6% vs. 3.4%, p < 0.01), but groups differed significantly. There were 1,492 matched pairs created, with effective reduction in bias; post-match propensity score covariates all had absolute standardized differences <0.1. In matched pair analysis, CAUTI patients had lower outcome of death compared with patients without CAUTI (6.7% vs. 10.1%, p < 0.01). The CAUTI was associated with longer length of stay, more intensive care unit and ventilator days, more unplanned events, and fewer discharges to home (all p < 0.01). Conclusions: Trauma patients with CAUTI had lower outcome of death compared with patients without CAUTI, despite worse clinical outcomes in all other aspects. This difference may be associated with "rescue" care in the form of unplanned events, and CAUTI may be an unintended consequence of this "rescue" care, rather than a marker of poor quality of care.

Outcomes Associated With Insertion of Indwelling Urinary Catheters by Medical Students in the Operating Room Following Implementation of a Simulation-Based Curriculum

PURPOSE

Catheter-associated urinary tract infection (CAUTI) is a priority quality metric for hospitals. The impact of placement of indwelling urinary catheter (IUC) by medical students on CAUTI rates is not well known. This study examined the impact of a simulation-based medical student education curriculum on CAUTI rates at an academic medical center.

METHOD

Patient characteristics, procedural data, and outcome data from all operating room IUC insertions from June 2011 through December 2016 at the Northwestern University Feinberg School of Medicine were analyzed using a multivariable model to evaluate associations between CAUTI and inserting provider. Infection data before and after implementation of a simulation-based IUC competency course for medical students were compared.

RESULTS

A total of 57,328 IUC insertions were recorded during the study period. Medical students inserted 12.6% (7,239) of IUCs. Medical students had the lowest overall rate of CAUTI among all providers during the study period (medical students: 0.05%, resident/fellows: 0.2%, attending physicians: 0.3%, advanced practice clinicians: 0.1%, nurses: 0.2%; P = .003). Further, medical student IUC placement was not associated with increased odds of CAUTI in multivariable analysis (odds ratio, 0.411; 95% confidence interval: 0.122, 1.382; P = .15). Implementation of a simulation-based curriculum for IUC insertion resulted in complete elimination of CAUTI in patients catheterized by medical students (0 in 3,471).

CONCLUSIONS

IUC insertion can be safely performed by medical students in the operating room. Simulation-based skills curricula for medical students can be effectively implemented and achieve clinically relevant improvements in patient outcomes.

Urinary Catheter-Associated Infections

Catheter-associated urinary tract infection remains one of the most prevalent, yet preventable, health care-associated infections. General prevention strategies include strict adherence to hand hygiene and antimicrobial stewardship. Duration of urinary catheterization is the most important modifiable risk factor. Targeted prevention strategies include limiting urinary catheter use; physician reminder systems, nurse-initiated discontinuation protocols, and automatic stop orders have successfully decreased catheter duration. Alternatives should be considered. If catheterization is necessary, proper aseptic practices for insertion and maintenance and closed catheter collection systems are essential for prevention. The use of bladder bundles and collaboratives aids in the effective implementation of prevention measures.

Factors Associated With Healthcare-Acquired Catheter-Associated Urinary Tract Infections: Analysis Using Multiple Data Sources and Data Mining Techniques

PURPOSE

The purpose of this study was to identify factors associated with healthcare-acquired catheter-associated urinary tract infections (HA-CAUTIs) using multiple data sources and data mining techniques.

SUBJECTS AND SETTING

Three data sets were integrated for analysis: electronic health record data from a university hospital in the Midwestern United States was combined with staffing and environmental data from the hospital's National Database of Nursing Quality Indicators and a list of patients with HA-CAUTIs.

METHODS

Three data mining techniques were used for identification of factors associated with HA-CAUTI: decision trees, logistic regression, and support vector machines.

RESULTS

Fewer total nursing hours per patient-day, lower percentage of direct care RNs with specialty nursing certification, higher percentage of direct care RNs with associate's degree in nursing, and higher percentage of direct care RNs with BSN, MSN, or doctoral degree are associated with HA-CAUTI occurrence. The results also support the association of the following factors with HA-CAUTI identified by previous studies: female gender; older age (>50 years); longer length of stay; severe underlying disease; glucose lab results (>200 mg/dL); longer use of the catheter; and RN staffing.

CONCLUSIONS

Additional findings from this study demonstrated that the presence of more nurses with specialty nursing certifications can reduce HA-CAUTI occurrence. While there may be valid reasons for leaving in a urinary catheter, findings show that having a catheter in for more than 48 hours contributes to HA-CAUTI occurrence. Finally, the findings suggest that more nursing hours per patient-day are related to better patient outcomes.