Parenteral to oral conversion of fluoroquinolones: low-hanging fruit for antimicrobial stewardship programs?

Guidelines for Antibiotics Prescription in Critically Ill Patients

How to cite this article: Khilnani GC, Tiwari P, Mittal S, Kulkarni AP, Chaudhry D, Zirpe KG, et al. Guidelines for Antibiotics Prescription in Critically Ill Patients. Indian J Crit Care Med 2024;28(S2):S104-S216.

Development of Inpatient Stewardship Metrics: Is It Time for Public Reporting?

Given the complexity and nuance needed to make antimicrobial prescribing decisions, metrics aiming to assess these decisions can be complex in method, require resource investment for measurement, and demand thoughtfulness in how to use data for program implementation and messaging to key partners. Antimicrobial stewardship programs today use several metrics of antimicrobial use in parallel with other clinical data for a multitude of purposes and audiences. Here, we discuss goals for inpatient stewardship metrics, current metrics used by stewardship programs locally and nationally, and future directions for antimicrobial use metric development.

Harvesting the low-hanging fruit? Comparative assessment of intravenous to oral route antimicrobial conversion policy implementation

Policies that promote conversion of antibiotics from intravenous to oral route administration are considered “low hanging fruit” for hospital antimicrobial stewardship programs. We developed a simple metric based on digestive days of therapy divided by total days of therapy for targeted agents and a method for hospital comparisons. External comparisons may help identify opportunities for improving prospective implementation.

Management of Children Admitted to Hospitals across Bangladesh with Suspected or Confirmed COVID-19 and the Implications for the Future: A Nationwide Cross-Sectional Study

There is an increasing focus on researching children admitted to hospital with new variants of COVID-19, combined with concerns with hyperinflammatory syndromes and the overuse of antimicrobials. Paediatric guidelines have been produced in Bangladesh to improve their care. Consequently, the objective is to document the management of children with COVID-19 among 24 hospitals in Bangladesh. Key outcome measures included the percentage prescribed different antimicrobials, adherence to paediatric guidelines and mortality rates using purposely developed report forms. The majority of 146 admitted children were aged 5 years or under (62.3%) and were boys (58.9%). Reasons for admission included fever, respiratory distress and coughing; 86.3% were prescribed antibiotics, typically parenterally, on the WHO ‘Watch’ list, and empirically (98.4%). There were no differences in antibiotic use whether hospitals followed paediatric guidance or not. There was no prescribing of antimalarials and limited prescribing of antivirals (5.5% of children) and antiparasitic medicines (0.7%). The majority of children (92.5%) made a full recovery. It was encouraging to see the low hospitalisation rates and limited use of antimalarials, antivirals and antiparasitic medicines. However, the high empiric use of antibiotics, alongside limited switching to oral formulations, is a concern that can be addressed by instigating the appropriate programmes.

Reinforcement of an infection control bundle targeting prevention practices for Clostridioides difficile in Veterans Health Administration nursing homes

BACKGROUND

Clostridioides difficile infection (CDI) causes significant morbidity in nursing home residents. Our aim was to describe adherence to a bundled CDI prevention initiative, which had previously been deployed nationwide in Veterans Health Administration (VA) long-term care facilities (LTCFs), and to improve compliance with reinforcement.

METHODS

A multicenter pre- and post-reinforcement of the VA bundle consisting of environmental management, hand hygiene, and contact precautions was conducted in 6 VA LTCFs. A campaign to reinforce VA bundle components, as well as to promote select antimicrobial stewardship recommendations and contact precautions for 30 days, was employed. Hand hygiene, antimicrobial usage, and environmental contamination, before and after bundle reinforcement, were assessed.

RESULTS

All LTCFs reported following the guidelines for cleaning and contact precautions until diarrhea resolution pre-reinforcement. Environmental specimens rarely yielded C difficile pre- or post-reinforcement. Proper hand hygiene across all facilities did not change with reinforcement (pre 52.51%, post 52.18%), nor did antimicrobial use (pre 87-197 vs. post 84-245 antibiotic days per 1,000 resident-days). LTCFs found it challenging to maintain prolonged contact precautions.

DISCUSSION

Variation in infection prevention and antimicrobial prescribing practices across LTCFs were identified and lessons learned.

CONCLUSIONS

Introducing bundled interventions in LTCFs is challenging, given the available resources, and may be more successful with fewer components and more intensive execution with feedback.

Research Agenda for Antimicrobial Stewardship in the Veterans Health Administration

Antimicrobial stewardship is vital to reducing the spread of antimicrobial resistance. A group of investigators and clinicians within the Veterans Health Administration set forth a research agenda for antimicrobial stewardship, including research targets for inpatient and outpatient stewardship activities, metrics, and antimicrobial dosing and duration.

Association of Inpatient Antimicrobial Utilization Measures with Antimicrobial Stewardship Activities and Facility Characteristics of Veterans Affairs Medical Centers

BACKGROUND

Antimicrobial stewardship programs (ASPs) have been advocated to improve antimicrobial utilization, but program implementation is variable. Antimicrobial stewardship programs (ASPs) have been advocated to improve antimicrobial utilization, but program implementation is variable.

OBJECTIVE

To determine associations between ASPs and facility characteristics, and inpatient antimicrobial utilization measures in the Veterans Affairs (VA) system in 2012.

DESIGN

In 2012, VA administered a survey on antimicrobial stewardship practices to designated ASP contacts at VA acute care hospitals. From the survey, we identified 34 variables across 3 domains (evidence, organizational context, and facilitation) that were assessed using multivariable least absolute shrinkage and selection operator regression against 4 antimicrobial utilization measures from 2012: aggregate acute care antimicrobial use, antimicrobial use in patients with non-infectious primary discharge diagnoses, missed opportunities to convert from parenteral to oral antimicrobial therapy, and double anaerobic coverage.

SETTING

All 130 VA facilities with acute care services.

RESULTS

Variables associated with at least 3 favorable changes in antimicrobial utilization included presence of postgraduate physician/pharmacy training programs, number of antimicrobial-specific order sets, frequency of systematic de-escalation review, presence of pharmacists and/or infectious diseases (ID) attendings on acute care ward teams, and formal ID training of the lead ASP pharmacist. Variables associated with 2 unfavorable measures included bed size, the level of engagement with VA Antimicrobial Stewardship Task Force online resources, and utilization of antimicrobial stop orders.

CONCLUSIONS

Formalization of ASP processes and presence of pharmacy and ID expertise are associated with favorable utilization. Systematic de-escalation review and order set establishment may be high-yield interventions. Journal of Hospital Medicine 2017;12:301-309.

Outpatient Parenteral Antimicrobial Therapy in Pediatric Medicaid Enrollees

BACKGROUND

Outpatient parenteral antimicrobial therapy (OPAT) is overused in cases where highly bioavailable oral alternatives would be equally effective. However, the scope of OPAT use for children nationwide is poorly understood. Our objective was to characterize OPAT use and clinical outcomes for a large population of pediatric Medicaid enrollees treated with OPAT.

METHODS

We analyzed the Truven MarketScan Medicaid claims database between 2009 and 2012. An OPAT episode was identified by capturing children with claims data indicating home infusion therapy for an intravenous antimicrobial. We characterized OPAT use by describing patient demographics, diagnoses, and antimicrobials prescribed. We categorized an antimicrobial as highly bioavailable if ≥80% systemic exposure was expected from the peroral dose. We also determined the percentage of OPAT recipients in whom a follow-up healthcare encounter occurred during the OPAT episode in either the emergency department or as a hospital admission. We reviewed the primary diagnoses associated with these healthcare encounters to determine whether it was related to OPAT.

RESULTS

We identified 3433 OPAT episodes in 2687 patients. A total of 4774 antimicrobials were prescribed during these episodes. Ceftriaxone and vancomycin were the most commonly prescribed antimicrobials. Highly bioavailable antimicrobials accounted for 34% of antimicrobials used for OPAT. An emergency department visit or hospital admission occurred during 38% of OPAT episodes, among which 61% were OPAT-related.

CONCLUSIONS

The high rate of medical encounters associated with OPAT in this cohort and the common prescribing of highly bioavailable antimicrobials underscore the opportunities for antimicrobial stewardship of pediatric OPAT.

Improvements in a program to convert i.v. to oral medications at an academic medical center

PURPOSE

Results of a study to implement targeted interventions to increase the number of documented i.v.-to-oral conversions and to increase cost savings from these documented conversions are reported.

METHODS

A before-and-after analysis of i.v.-to-oral conversions at an academic medical center following the addition of targeted interventions to an existing pharmacist-initiated conversion program was conducted. Targeted interventions included staff training on i.v.-to-oral conversions, implementation of a new documentation system, and feedback to the staff. Major outcomes studied included the total number of i.v.-to-oral conversions documented per month and the cost savings generated by these conversions.

RESULTS

The mean ± S.D. number of i.v.-to-oral conversions documented per month significantly increased after the implementation of targeted interventions (25 ± 9 before and 57 ± 6 after implementation, p < 0.0001). There was a nonsignificant increase in cost savings generated per month after implementation of the interventions. The most commonly converted medication was pantoprazole. Conversions of levetiracetam generated the highest cost savings.

CONCLUSION

Addition of several targeted interventions to an existing pharmacist-initiated i.v.-to-oral conversion program led to a significant increase in the total number of documented conversions.

Implementing an Antibiotic Stewardship Program: Guidelines by the Infectious Diseases Society of America and the Society for Healthcare Epidemiology of America

Evidence-based guidelines for implementation and measurement of antibiotic stewardship interventions in inpatient populations including long-term care were prepared by a multidisciplinary expert panel of the Infectious Diseases Society of America and the Society for Healthcare Epidemiology of America. The panel included clinicians and investigators representing internal medicine, emergency medicine, microbiology, critical care, surgery, epidemiology, pharmacy, and adult and pediatric infectious diseases specialties. These recommendations address the best approaches for antibiotic stewardship programs to influence the optimal use of antibiotics.

New Horizons for Pediatric Antibiotic Stewardship

Antibiotic resistance remains a major health threat and the overuse of antimicrobials contributes to this serious problem. Antimicrobial stewardship programs (ASPs) are effective in decreasing the inappropriate use of antimicrobials. The development of pediatric ASPs is increasing and these programs have proven effective in optimizing antimicrobial use in children. The value of ASPs is gaining recognition and the expansion of stewardship into additional health care settings is expected. Collaborative efforts are underway among pediatric ASPs to enhance best practices and develop efficient and effective strategies to minimize unnecessary antimicrobial use in children.

The need for cost-effectiveness analyses of antimicrobial stewardship programmes: A structured review

The cost effectiveness of antimicrobial stewardship (AMS) programmes was reviewed in hospital settings of Organisation for Economic Co-operation and Development (OECD) countries, and limited to adult patient populations. In each of the 36 studies, the type of AMS strategy and the clinical and cost outcomes were evaluated. The main AMS strategy implemented was prospective audit with intervention and feedback (PAIF), followed by the use of rapid technology, including rapid polymerase chain reaction (PCR)-based methods and matrix-assisted laser desorption/ionisation time-of-flight (MALDI-TOF) technology, for the treatment of bloodstream infections. All but one of the 36 studies reported that AMS resulted in a reduction in pharmacy expenditure. Among 27 studies measuring changes to health outcomes, either no change was reported post-AMS, or the additional benefits achieved from these outcomes were not quantified. Only two studies performed a full economic evaluation: one on a PAIF-based AMS intervention; and the other on use of rapid technology for the selection of appropriate treatment for serious Staphylococcus aureus infections. Both studies found the interventions to be cost effective. AMS programmes achieved a reduction in pharmacy expenditure, but there was a lack of consistency in the reported cost outcomes making it difficult to compare between interventions. A failure to capture complete costs in terms of resource use makes it difficult to determine the true cost of these interventions. There is an urgent need for full economic evaluations that compare relative changes both in clinical and cost outcomes to enable identification of the most cost-effective AMS strategies in hospitals.

Antibiotic use in US hospitals: quantification, quality measures and stewardship

A majority of patients hospitalized in the US hospitals receive an antibiotic during their hospitalization. Furthermore, up to half of antibiotics prescribed in hospitals are inappropriate. In the setting of continued emergence of antibiotic-resistant pathogens and a limited pipeline of new antimicrobials, attention to optimizing antibiotic use in healthcare settings is essential. We review the measures of antibiotic consumption in the USA, the evolving metrics for comparing antibiotic use (known as benchmarking), trends in antibiotic use, the structure and outcome measures of Antimicrobial Stewardship Programs and interventions to optimize antimicrobial use.

Does universal active MRSA surveillance influence anti-MRSA antibiotic use? A retrospective analysis of the treatment of patients admitted with suspicion of infection at Veterans Affairs Medical Centers between 2005 and 2010

OBJECTIVES

After the implementation of an active surveillance programme for MRSA in US Veterans Affairs (VA) Medical Centers, there was an increase in vancomycin use. We investigated whether positive MRSA admission surveillance tests were associated with MRSA-positive clinical admission cultures and whether the availability of surveillance tests influenced prescribers' ability to match initial anti-MRSA antibiotic use with anticipated MRSA results from clinical admission cultures.

METHODS

Analyses were based on barcode medication administration data, microbiology data and laboratory data from 129 hospitals between January 2005 and September 2010. Hospitalized patient admissions were included if clinical cultures were obtained and antibiotics started within 2 days of admission. Mixed-effects logistic regression was used to examine associations between positive MRSA admission cultures and (i) admission MRSA surveillance test results and (ii) initial anti-MRSA therapy.

RESULTS

Among 569,815 included admissions, positive MRSA surveillance tests were strong predictors of MRSA-positive admission cultures (OR 8.5; 95% CI 8.2-8.8). The negative predictive value of MRSA surveillance tests was 97.6% (95% CI 97.5%-97.6%). The diagnostic OR between initial anti-MRSA antibiotics and MRSA-positive admission cultures was 3.2 (95% CI 3.1-3.4) for patients without surveillance tests and was not significantly different for admissions with surveillance tests.

CONCLUSIONS

The availability of nasal MRSA surveillance tests in VA hospitals did not seem to improve the ability of prescribers to predict the necessity of initial anti-MRSA treatment despite the high negative predictive value of MRSA surveillance tests. Prospective trials are needed to establish the safety and effectiveness of using MRSA surveillance tests to guide antibiotic therapy.

Correlates and Economic and Clinical Outcomes of an Adult IV to PO Antimicrobial Conversion Program at an Academic Medical Center in Midwest United States

The study objectives were to evaluate the correlates and outcomes of a parenteral (IV) to oral (PO) antimicrobial conversion program at a Midwest US Academic Medical Center with the hypothesis that it will be associated with reduced drug costs. Patient-level data (n = 237; sex, race, admission source, admission status, admission severity, risk of mortality [relative expected, admission], and early death) were extracted from the Clinical Data Base/Resource Manager. Medication-level, drug-encounter data (n = 317; antibiotic/dose/route/frequency/duration, conversion status, 10-day IV/PO switch-eligibility criteria) were extracted from patient’s hospital medical records. Univariate analyses using chi-square or Fisher’s exact test for categorical variables and Wilcoxon rank-sum test for continuous variables showed patients not converted (n = 149) versus converted (n = 88) at some point from IV to PO were more likely to be of white race and had higher risk of relative expected mortality. By applying the unit drug cost (derived from 2010 Thomson Reuters RED BOOKTM) and labor costs for IV/PO administration, both per dose, the overall 1-month drug cost-saving estimates in 2010 in US dollars were US$5242 from converting and US$8805 savings missed from not converting 518 and 1387 switch-eligible antibiotic doses, respectively. Despite sample-size limitations, this study demonstrated correlates and missed opportunities to convert antimicrobials from IV to PO, which warrants providers’ attention.

A sustainable strategy to prevent misuse of antibiotics for acute respiratory infections

Backgrounds

Over 50% of antibiotics prescriptions are for outpatients with acute respiratory infections (ARI). Many of them are not needed and thus contribute both avoidable adverse events and pressures toward the development of bacterial resistance. Could a clinical decision support system (CDSS), interposed at the time of electronic prescription, adjust antibiotics utilization toward consensus treatment guidelines for ARI?

Methods

This is a retrospective comparison of pre- (2002) and post-intervention (2003–2006) periods at two comprehensive health care systems (intervention and control). The intervention was a CDSS that targeted fluoroquinolone and azithromycin; other antibiotics remained unrestricted. 7000 outpatients visits flagged by an ARI case-finding algorithm were reviewed for congruence with the guidelines (antibiotic prescribed-when-warranted or not-prescribed-when-unwarranted).

Results

3831 patients satisfied the case definitions for one or more ARI: pneumonia (537), bronchitis (2931), sinusitis (717) and non-specific ARI (145). All patients with pneumonia received antibiotics. The relative risk (RR) of congruent prescribing was 2.57 (95% CI = (1.865 to 3.540) in favor of the intervention site for the antibiotics targeted by the CDSS; congruence did not change for other antibiotics (adjusted RR = 1.18 (95% CI = (0.691 to 2.011)). The proportion of unwarranted prescriptions of the targeted antibiotics decreased from 22% to 3%, pre vs. post-intervention (p<0.0001).

Conclusions

A CDSS interposed at the time of e-prescription nearly extinguished unwarranted use targeted antibiotics for ARI for four years. This intervention highlights a path toward sustainable antibiotics stewardship for outpatients with ARI.

Is the "low-hanging fruit" worth picking for antimicrobial stewardship programs?

A new antimicrobial stewardship program can be overwhelmed at the breadth of interventions and education required to conduct a successful program. The expression "low-hanging fruit," in reference to stewardship, refers to selecting the most obtainable targets rather than confronting more complicated management issues. These targets include intravenous-to-oral conversions, batching of intravenous antimicrobials, therapeutic substitutions, and formulary restriction. These strategies require fewer resources and less effort than other stewardship activities; however, they are applicable to a variety of healthcare settings, including limited-resource hospitals, and have demonstrated significant financial savings. Our stewardship program found that staged and systematic interventions that focus on obvious areas of need, that is, low hanging fruit, provided early successes in our expanded program with a substantial cumulative cost savings of $832,590.