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Strategies for Optimizing Anti-Infective Therapy in the Home Infusion Setting
Supported by an unrestricted educationalgrant from Cubist Pharmaceuticals
Thursday, April 77:00‐8:45 a.m.Hilton Orlando—Florida Ballroom 4
NHIA Annual Conference & Exposition
A Symposium Held in Conjunction with the 2011 NHIA Annual Conference & Exposition
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 1
Thursday, April 7, 7:00 to 8:45 a.m.06‐S. Strategies for Optimizing Anti‐infective Therapy in the Home Infusion Setting Supported by an educational grant from Cubist PharmaceuticalsHilton Orlando – Florida Ballroom 4Pharmacist, Pharmacy Technician and Nurse Continuing Education Contact Hours: 1.5ACPE Pharmacist and Pharmacy Technician Program #: 207‐999‐11‐232‐L01‐P&TKnowledge‐Based Learning Activity
Education Overview:Antimicrobial drug resistance and emerging “super bugs” remain a global crisis as we face a future with few new drugs in the antimicrobialpipeline. Clinicians are increasingly being called upon to identify and implement strategies that will prolong the efficacy of our current ar‐senal. Education is an essential component in ensuring that clinicians have the knowledge base needed to fully comprehend the alarmingtrends in microbial resistance, and to understand the steps that must be taken today in order to sustain our current level of control overthese microorganisms. With clinicians at the patient’s bedside playing a pivotal role in antimicrobial treatment success or failure, educationalprogramming that addresses these concepts and provides guidance for future clinical best practice is foundational to their success.
With antimicrobial stewardship and optimization as the cornerstones, this program will educate clinicians regarding their crucial role in ap‐propriate selection and delivery of available treatment regimens that are based on the individual patient’s medical condition, self‐care abil‐ities, and level of caregiver support. Novel delivery approaches will be examined, including prolonged and continuous antimicrobialadministration, in concert with strategies to improve patient compliance through education and clinical monitoring. Clinicians will leavethis program armed with the critical knowledge they need to be effective antimicrobial stewards in the home infusion setting.
Faculty: David J. Feola, Pharm.D., Ph.D., BCPS, Assistant Professor, Pharmacy Practice and Science, University of Kentucky College of Pharmacy,Lexington, KY
Dr. Feola is an Assistant Professor at the University of Kentucky College of Pharmacy in the Department of Pharmacy Practice and Science,and holds a Joint Appointment in the Division of Infectious Diseases, Department of Internal Medicine at the UK College of Medicine. Hereceived a Doctor of Pharmacy degree in 1997, a Doctor of Philosophy degree in Clinical and Experimental Therapeutics in 2005, and com‐pleted residency training in both Pharmacy Practice and Infectious Diseases Therapeutics. His research program focuses on mechanisticand translational investigations to define the role of alternative macrophage activation in the pathophysiology of pulmonary fibrosis. Thisis accomplished through the use of a mouse model of Pseudomonas aeruginosa infection and through clinical studies in patients with cysticfibrosis. The goal of this research is to identify potential therapeutic targets to slow the progression of chronic inflammation and tissue re‐modeling as the immune system interfaces with bacterial pathogens in the lungs. He also coordinates the infectious diseases module inthe Advanced Therapeutics course for the Doctor of Pharmacy Program, and provides clinical service to the Infectious Diseases inpatientconsult team at the UK Chandler Medical Center.
Pharmacist and Nurse Education Objectives:1. Describe factors influencing trends in resistance of organisms.2. Discuss the current status of antimicrobial resistance rates and patterns among common pathogens.3. Examine novel antimicrobial delivery approaches.4. List strategies to achieve optimum outcomes when administering antimicrobial agents in the alternate‐site setting.
Pharmacy Technician Education Objectives:1. Describe factors influencing trends in resistance of organisms.2. Discuss the current status of antimicrobial resistance rates and patterns among common pathogens.3. Examine novel antimicrobial delivery approaches.4. List strategies to achieve optimum outcomes when administering antimicrobial agents in the alternate‐site setting.
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition2
Learning Assessment Questions:
1. You are treating a patient with outpatient parenteral antimicrobial therapy (OPAT) for a severe skin infection with community‐acquiredMRSA. It is important to understand that compared to hospital‐acquired MRSA strains, in general community‐acquired MRSA strainshave:a. More virulence, more resistance b. More virulence, less resistance c. Less virulence, more resistanced. Less virulence, less resistance
2. In the monitoring of home antimicrobial therapy, beta‐lactamase production by the infecting organism can lead to:a. Treatment failureb. Change in antimicrobial agentc. Need for combination therapyd. All of the above
3. You sit on your organization’s OPAT team, charged with making policy decisions based on formulary inclusion and use of antimicrobials.Which of the following drug classes has the highest rate of collateral damage associated with its use?a. 3rd generation cephalosporinsb. 1st generation cephalosporinsc. Aminopenicillinsd. Fluoroquinolonese. Tetracyclines
4. Which of the following statements is true regarding antimicrobial stewardship?a. Always make sure that you cover all infectious possibilities with empiric therapyb. Err on the side of caution with empiric treatment of infectious diseases because as long as we redirect therapy when we get culture
results, outcomes aren’t affected by inadequate initial therapyc. We must balance adequate empiric therapy with judicious antimicrobial used. All of the above are true
5. Which of the following statements concerning antimicrobial use and resistance is false?a. Resistance is higher in healthcare‐associated infections compared to infections from the communityb. Receipt of previous antimicrobial therapy is a risk factor for resistancec. Care settings with highest antimicrobial use are associated with highest resistance ratesd. Increased duration of therapy decreases the likelihood of colonization with resistant organismse. All of the above are true
Answers can be found on the last page of this booklet.
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 3
Strategies for Optimizing Anti-Infective
Therapy in the Home Infusion Setting David J. Feola, Pharm.D., Ph.D.
Assistant Professor University of Kentucky College of Pharmacy
Top 5 Things to Know for CE: Make sure your BADGE IS SCANNED each time you enter a session, to record
your attendance. Carry the Evaluation Packet you received on registration with you to EVERY
session. If you’re not applying for CE, we still want to hear from you! Your opinions about our conference are very valuable.
Pharmacists, Pharmacy Technicians and Nurses need to track their hours on the Statement of Continuing Education Certificate form as they go.
FOR CE: At your last session, total the hours and sign both pages of your Statement of Continuing Education Certificate form.
Keep the PINK copies for your records. Place the YELLOW and WHITE copies in your Evaluation packet. Make sure an evaluation form from each session you attended is
completed and in your Evaluation packet (forgot to pick up an evaluation form at a session? (Extras are available in an accordion file near the registration desk.)
Put your name and unique member ID number (six digit number on the bottom of your badge) on the outside of the packet, seal it, and drop it in the drop boxes in the NHIA registration area at the convention center.
Disclosures
David Feola declares no conflicts of interest or financial interest in any service or product mentioned in this program.
Clinical trials and off-label uses will not be discussed during this presentation.
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition4
Modern Healthcare, August 7, 2006, page 36 – Protesting infections from MRSA
Hospital Acquired Infections
Mortality Length of Stay Average Charge Readmission Rate
Without infection 1.8% 4.9 days $37,635 16.3%
With HAI 9.4% 21.6 days $306,943 40.7%
Pennsylvania 2009 Heath Care Cost Containment Counsel
“Patients/consumers can use this report as an aid in making decisions about where to seek treatment…”
PA Health Care Cost Containment Council, February 2011 www.phc4.org/reports/hai/09/docs/hai2009report.pdf
Educational Objectives
1. Describe factors influencing trends in resistance of microorganisms.
2. Discuss the current status of antimicrobial resistance rates and patterns among common pathogens.
3. Examine novel antimicrobial delivery approaches.
4. List strategies to achieve optimum outcomes when administering antimicrobial agents in the alternate-site setting.
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 5
Presentation Overview
Why antimicrobial management is essential
What is antimicrobial stewardship IDSA Guidelines: Definition Application to OPAT
How to implement/role of practitioners Recommendations Novel delivery approaches Strategies in the alternate-site setting
Why Stewardship is Needed
Antimicrobial resistance results in Increased morbidity/mortality Increased healthcare costs
Practices in antimicrobial use often inadequate, not routinely implemented
Up to 50% antimicrobial prescribing inappropriate Causal relationship between antimicrobial use and emergence of resistance
A Disturbing Trend
1930 1940 1950 1960 1970 1980 1990 2000 2010
Sulfa, BL, AG, Chloramphenicol
TCN, MAC, Vanc, RIF, FQ, TMP
No new classes. Modification of existing agents.
LZD, DAP, TIG
CPT; DAL; New Entities
Limited
PCN-resistant S. aureus
MRSA
VRE
VISA in 7 states
VRSA
LZD-R S. aureus
MDR Pseudomonas and Acinetobacter, metallo-beta-lactamases, carbapenemases
Over half of companies END antimicrobial research and development
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition6
The Critical Balance
Importance of appropriate empiric therapy
Effect of broad-spectrum therapy on resistance
Mortality increases when initial therapy is inappropriate
Resistance increases when broad-spectrum
agents are needed; Resistance has a
negative impact on outcomes
“Collateral damage”
Appropriate Initial Therapy
*Difference in mortality not significant. LOS significantly increased
Importance of appropriate empiric therapy
Effect of broad-spectrum therapy on resistance
Antimicrobial Use and Resistance
Changes in use parallel changes in resistance Resistance higher in healthcare-associated infections Patients with resistant infections more likely to have received prior antimicrobials Hospital areas of highest resistance associated with highest antimicrobial use Increased duration of therapy increase likeliness of colonization with resistant organisms
Shales DM et al. CID 1997;25:584-99.
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 7
Resistance and OPAT
Most common resistant organisms in OPAT Methicillin-resistant Staph aureus (MRSA) Vancomycin-resistant Enterococci (VRE) Multidrug-resistant Gram-negatives
P. aeruginosa K. pneumoniae E. coli
Penicillin-resistant Streptococcus pneumoniae
CDC. Multidrug-Resistant Organisms in Non-Hospital Healthcare Settings. www.cdc.gov/ncidod/dhqp/ar_multidrugFAQ.html
MRSA and Outcomes
MRSA vs. MSSA bacteremia Clinical Failure: 59.6% vs. 33% (P<0.001) Length of Stay (infection-related): 20.1 vs. 13.7 days (P<0.001)
Mortality (infection-related): 30.6% vs. 15.3% (P=0.001)
Lodise T and McKinnon P. Diag Microbiol Inf Dis 2005;52.
Effect of broad-spectrum therapy on resistance
and outcomes
Importance of appropriate empiric therapy
VRE and Outcomes
VRE bacteremia Decreased survival: 24% vs. 59% Length of Stay: 34.8 vs. 16.7 days
Attributable cost: $27,190
VRE bloodstream meta-analysis Mortality increase: 30%
Stoser V et al. Arch Int Med 1998;158:522-7
DiazGranados CA et al. CID 2005;41:327-33.
Salgado CD et al. Inf Contr Hosp Epid 2003;24:690-8.
Effect of broad-spectrum therapy on resistance
and outcomes
Importance of appropriate empiric therapy
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition8
ESBL Production and Outcomes
Non-urinary tract isolates of Klebsiella, E. coli Length of stay
21 days vs. 11 days (P=0.006)
Clinical success 48% vs. 86% (P=0.027)
Lee, et al. Inf Cont Hosp Epi 2006;27:1226-32
Effect of broad-spectrum therapy on resistance
and outcomes
Importance of appropriate empiric therapy
New Resistant Bacteria
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 9
Collateral Damage
Fluoroquinolones—selection of resistant isolates when appropriate pharmacodynamic parameters are not met (AUC/MIC)
Pseudomonas aeruginosa Methicillin-susceptible Staph aureus Streptococcus pneumoniae
Garcia-Rey C et al. Clin Microbial Infect 2006;12:55-66 Jacobi GA. Clin Infec Dis 2005;41:S120-6 Cook PP et al. J Hosp Infect 2006:54:341-58.
Collateral Damage
3rd generation cephalosporins Cause/associated with several different problems (oximinocephalosporins)
Extended-spectrum beta-lactamases Selection of stably derepressed isolates Gram-negatives Selection of vancomycin-resistant enterococcus Contribution to MRSA emergence Increased cases of Clostridium difficile associated diarrhea/colitis
Dancer SJ. J Antimcirobial Chemother 2001; 48: 463-478
Pseudomonas aeruginosa Correlation Between Imipenem Use and Resistance
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition10
Mechanism Classes
Mechanism Affected Agents
Drug modification/degradation -lactams, FQ, AGL, TCN, macrolides, linezolid, clindamycin
Decreased bacterial permeability
Sulfa, AGL, TCN, daptomycin, carbapenems
Alteration of target site -lactams, FQ, TCN, vancomycin, linezolid, clindamycin, macrolides
Efflux pumps FQ, AGL, TCN, macrolides, carbapenems
-Lactamases
More than 340 different types have been described More than 120 ESBLs New ESBLs identified monthly
Classified by: Plasmid vs. chromosomally mediated
Genes located on plasmids can spread
Constitutive vs. inducible production Expression relates to -lactam exposure
TEM and SHV -Lactamases
Extended spectrum beta-lactamases (ESBL) Mutants of classical enzymes Hydrolyze most extended-spectrum cephalosporins and aztreonam Carbapenems are spared Inhibited by clavulanic acid
Organisms that produce ESBLs Klebsiella, E. coli, other Enterobacteriaceae and non-fermenting Gram-negative bacteria
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 11
Molecular Basis of ESBLs
Treatment of ESBL Producers
Carbapenems: current drugs of choice
Cefepime: more stability but reports of treatment failures
Little reported experience with trimethoprim/ sulfamethoxazole, aminoglycosides and fluoroquinolones
Tigecycline may be an option
Inducible Beta-lactamases
Produced by the SPACE Bacteria Serratia marcescens Pseudomonas aeruginosa Acinetobacter species Citrobacter species
Enterobacter species
-lactamase under the control of the ampC gene (turn on) and repressor gene (turn off)
Mutation is loss of the repressor gene – terminology is the isolate becomes “stably de-repressed” Drugs of choice: carbapenems, cefepime
Bush, K. Clin Infect Dis 2001; 32: 1085 - 1089
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2011 NHIA Annual Conference & Exposition12
Stable Derepression
Selection of stable derepressed mutants: susceptible when tested, then resistance 3 days later
Resistant Strain Rare
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Resistant Strain Dominant
Carbapenems: Emerging Resistance
Meropenem and P. aeruginosa Up-regulation of efflux pumps Loss of the OprD protein (porin channel)
Both mutations needed for resistance development MIC 0.12–0.5 g/ml (before mutation) MIC 2-4 g/ml (with one mutation) MIC >8 g/ml (with both mutations)
Emergence of carbapenemases
Livermore D. JAC 2001; 47: 247-250
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 13
PCN Binding Proteins
MRSA – loss of the target site – PBP2 which is replaced by PBP2a
mecA gene, associated with other resistance genes in the Staphylococcal chromosome cassette (SCCmec) PBP2a confers resistance to all beta-lactams
Streptococcus pneumoniae PCN resistance when mutations in 4 PBPs If PCN resistant, increased macrolide resistance, FQ resistance still low
CA-MRSA Prescribing Trends
KY Medicaid Database
Beavers C. et al. Unpublished
MRSA Treatment Options
FDA-approved Vancomycin, linezolid, daptomycin, tigecycline, telavancin
Not FDA-approved, often used SMX-TMP, clindamycin, doxycycline
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition14
CA-MRSA vs. HA-MRSA
Characteristic CA-MRSA HA-MRSA Susceptibility
Chloramphenicol Usually susceptible Frequently resistant
Clindamycin Usually susceptible Frequently resistant
Erythromycin Usually resistant Usually resistant
TMP/SMZ Usually susceptible Usually susceptible
SCC mec type IV II
Lineage USA 300 USA 100, USA 200
Toxins More Fewer
PVL Common Rare
Weber JT. CID 2005;41 Suppl 4:S269-72
CA-MRSA Importance of I&D
166 patients randomized to receive cephalexin or placebo after incision and drainage
87.8% of positive cultures were MRSA
Outcome Number of Isolates
All isolates MRSA PVL-positive
Cephalexin (82)
Cure 69 40 38
Failure 13 2 2
Placebo (84)
Cure 76 39 37
Failure 8 4 3
Rajendran et al. Antimicr Agents Chemother 2007;51:4044-8.
Vancomycin
Glycopeptide antimicrobial that inhibits transpeptidation reaction
D-ala–D–ala
Mechanisms of resistance: change in bacterial target D-ala–D–lac (VanA, B, D) D-ala–D–ser (VanC, E, L) Enterococcus sp.
E. faecium incidence of resistance higher that E. faecalis VanA gene is on a plasmid
Am J Health Syst Pharm 2000;57:S4-9 Clin Pharmacokinet 2004;43:925-942 Clin Infect Dis 2006; 2006; 42:S35–9
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 15
Vancomycin Resistance
MRSA increasing MICs to vancomycin (1-2 mcg/ml) Still susceptible, but increase in treatment failures VISA mechanism: increased cell wall structural material
VRSA mechanism: MRSA acquires the VanA gene Rare in the US
Am J Health Syst Pharm 2000;57:S4-9 Clin Pharmacokinet 2004;43:925-942 Clin Infect Dis 2006; 2006; 42:S35–9
Vancomycin MIC and Outcomes
Clinical success rates decrease with increasing MICs, even in the susceptible range
Percent Success
Vanco MIC ( g/ml) Bacteremia Various Indications
0.5 56 54
1.0 28
1.0-2.0 10
2.0 8
Moise-Broder PA. Clin Infect Dis. 2004;38:1700-05. Sakoulas G et al. J Clin Microbiol. 2004; 42:2398-402.
MRSA Treatment Options
Vancomycin still the standard
What are the local MICs for MRSA (i.e., 0.5 vs. 2 μg/ml)
Need for higher doses
Alternatives to Vancomycin
Hospitalized SSSI – Daptomycin, linezolid, tigecycline
Hospital-acquired pneumonia – Linezolid, tigecycline, telavancin
Bacteremia – Daptomycin monotherapy
Endocarditis – Daptomycin monotherapy
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition16
Resistance and OPAT
Risk factors for infection with resistant organisms Severity of illness Previous exposure to antimicrobial agents Underlying disease conditions
Chronic renal disease, DM, PVD, skin lesions
Invasive procedures Dialysis, invasive devices, urinary catheterization
Repeated contact with healthcare system Previous colonization with drug-resistant organisms Advanced age
CDC. Multidrug-Resistant Organisms in Non-Hospital Healthcare Settings. www.cdc.gov/ncidod/dhqp/ar_multidrugFAQ.html
Economic Impact of Resistance
S. aureus bacteremia Methicillin resistance: 100% greater cost of therapy
Klebsiella and E. coli infections ESBL production: 66% greater cost of therapy
Pseudomonas aeruginosa infections Imipenem resistance: 68% greater cost of therapy
Lodise T and McKinnon P. Diag Microbiol Inf Dis 2005;52.
Lee, et al. Inf Cont Hosp Epi 2006;27:1226-32.
Lautenbach, et al. Inf Cont Hosp Epi 2006;27:893-90.
Antimicrobial Stewardship
Infection control plus antimicrobial management Appropriate antimicrobial selection, dosing, route, and duration System selection of antimicrobials that cause the least collateral damage
MRSA ESBLs Clostridium difficille Stable derepression Metallo-beta-lactamases and other carbapenemases VRE
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 17
Guideline Resources
IDSA and SHEA Guidelines for Developing an Institutional Program to Enhance Antimicrobial Stewardship Dellit TH et al. CID 2007;44:159-77
IDSA Practice Guidelines for Outpatient Parenteral Antimicrobial Therapy
Tice AD et al. CID 2004;38:1651-72
ASM and SHEA Antimicrobial Resistance Prevention Initiative Moellering RC et al. Am J of Inf Contr 2007;35:S1-23
Role of Infection Control
Infection control trumps everything else Hand hygiene – must have hand washing police Barrier precautions
Devotion to all aspects of strict infection control Nursing staff Medical staff Medical staff leadership
Infection Control – is it cost effective?
Infection Cost Savings VAP $25,072 Bacteremia $23,242 Surgical Site infection $10,443 Urinary Tract Infection $ 758
Anderson, et al. Infect Control Hosp Epidem 2007;28:767-73
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition18
Resistance and OPAT
Home precautions Wash hands with soap and water after physical contact with infected person, and before leaving the home Wash towels after each use Wear disposable gloves for contact of body fluids, and wash hands after glove removal Change linens on a routine basis Clean patient environment regularly Notify all who provide care that the patient is colonized/infected with a multidrug-resistant pathogen
CDC. Multidrug-Resistant Organisms in Non-Hospital Healthcare Settings. www.cdc.gov/ncidod/dhqp/ar_multidrugFAQ.html
Hand Hygiene
Bacterial contamination of mobile phones 110 nurses carrying mobile phones
79.1% of phones had viable bacteria
68.6% had S. aureus
Flora on mobile phones at a teaching hospital S. aureus 33%
P. aeruginosa 2%
Acinetobacter spp. 9.1%
Behavioral changes necessary
Single-most effective measure to prevent spread of resistant organisms
Multifaceted educational programs, persistence
vs.
Mathai E et al. Infection 2010;38(5):349-56. Morioka I et al. 2011;66(1):115-21 Sadat-Ali M et al. AJIC 2010;38:404-5
Goals of Stewardship
Primary goal Optimize clinical outcome/minimize unintended consequences of antimicrobial use Unintended consequences:
Toxicity Selection of pathogenic organisms Emergence of resistant pathogens
Secondary goal Reduce healthcare costs without adversely impacting quality of care
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 19
Active Core Strategies
Prospective audit with intervention and feedback to reduce inappropriate antimicrobial use
Formulary restriction and pre-authorization leading to reductions in antimicrobial use and cost
NOTE – neither of these strategies are mutually exclusive
Assessments
Antimicrobial consumption Defined daily dose Cost Days of treatment
Antimicrobial adverse events Resistance patterns/development Clinical outcomes measurements
Patel D et al. Exp Rev Anti Infect Ther 2008; 6:209-22
Elements for Consideration
Parenteral to oral conversion OPAT allows for IV treatment to continue, while minimizing cost
Streamlining/de-escalating therapy Often requires changes in home care/monitoring
Dose optimization Based on PK/PD parameters
Educational programs Prescribers, clinicians, patients, caregivers
Guidelines/clinical pathways development Incorporate local antimicrobial resistance data
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition20
Formulary Restriction: Example
After initiation of formulary restriction
Third-generation cephalosporins use decreased
Cefepime use remained stable
Rates of ceftazidime-resistant Klebsiella pneumoniae decreased
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 21
Continuous Infusion
Vancomycin Continuous infusion unlikely to substantially improve patient outcomes
Beta-lactams Meta-analysis of 9 RCT
Clinical failure rate lower, statistically significant in studies of patients receiving same total daily dose
No differences in mortality
Rybak MJ et al. Am J Health-Syst Pharm 2009;66:82-98.
Kasiakou SK et al. Lancet Inf Dis 2005;5(9):581-9.
Continuous Infusion
Piperacillin/tazobactam Harford Hospital utilizing CI since 1999
Results dependent upon MIC
Use for P. aeruginosa
Kim A et al. Pharmacotherapy 2007;27(11):1490-7.
Grant EM et al. Pharmacotherapy 2002;22:471-83.
Success Rates P Value
Clinical Microbiologic
Continuous 94% 89% 0.081
Intermittent 82% 73% 0.092
PK/PD Challenges in OPAT
Must balance optimum dosing and convenience Continuous infusion of beta-lactams increasingly studied Intricate communication required for therapeutic drug monitoring and dosage adjustment in home Adequate dosing must minimize collateral damage Treatment duration with antimicrobials an issue on the horizon
Tice AD et al. CID 2004;38:1651-72.
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition22
Treatment Duration
Adequate duration essential However, increases in duration equate with increases in resistance development
Experts call for study of treatment duration to attempt to minimize Will require individualized patient case decisions and coordination
OPAT uniquely positioned to impact this issue
Rice LB. CID 2008;46:491-6.
Treatment Duration
Prolonged antibiotics courses have long been considered the solution to, instead of the cause of, resistance
CDC “Get Smart” Website “Complete the prescribed course of treatment, even if you are feeling better.”
Example: CAP Guidelines 2000: “We are not aware of any controlled trials that have specifically addressed the question of how long pneumonia should be treated”
2007: “Patients with CAP should be treated for a minimum of 5 days, should be afebrile for 48-72h, and should have no more than 1 sign of CAP-associated clinical instability before discontinuation of therapy.”
Rice LB. CID 2008;46:491-6.
www.cdc.gov/getsmart (accessed Mar 29, 2011)
Mandel LA et al. CID 2007;44(Suppl 2):S27-72.
Research Priorities
Antimicrobial duration of therapy
Validation of mathematical models of resistance
Long-term impact of formulary restrictions
Focusing interventions on “collateral damage issues”
Development of more rapid susceptibility tests
Bad bugs/no drugs – stimulate research
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Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition 23
Critical Success Factors
Collegial and educational relationship
Review of antimicrobial orders by a consistent accountable team
Support of hospital/medical leadership
FTE’s dedicated to stewardship
Development of criteria and guidelines for anti-infective use
Formulary restriction
Education of prescribers to insure compliance
Summary and Conclusions
Antimicrobial Stewardship programs show great promise and offer new opportunities for patient care and cost impact
Recommendation by both IDSA/ASHP and the CDC offer firm foundations to obtain support and funding for antimicrobial stewardship programs
Huge opportunity for advancement of clinical pharmacy practice, role of OPAT
Strategies for Optimizing Anti‐Infective Therapy in the Home Infusion Setting
2011 NHIA Annual Conference & Exposition24
Answers:BDACD