Line Infections diagnosis and treatment

1. Line Infectionsdiagnosis and treatment Hospital medicine curriculum Pamela pride md,fhm Medical University of South Carolina May 21, 2013

2. Learning objectives • Differentiate types of infection associated with vascular access • Formulate appropriate empiric therapy based on patient specific risk factors • Recite indications for antibiotic lock therapy • Prescribe appropriate antibiotic therapy based on culture results

3. Key messages • 1. Catheter related bloodstream infection (CRBSI) is defined as growth of the same microorganism in blood drawn from a percutaneous stick and from an intravenous catheter. • 2. The treatment of line infections depends on type of catheter and microorganism. • 3. Antibiotic lock therapy is used to salvage long term catheters infected in certain circumstances.

4. Introduction • >150,000 devices purchased annually by US hospitals • >100,000 deaths • $6.5 billion cost • Result in average LOS of 12 days longer in hospital

5. Pathophysiology • How do these infections happen? • Migration of skin flora from insertion site • Direct contamination of catheter • Hematogenous seeding • Contaminated infusate

6. Risk Factors • Risk varies based on: • Type of device • Midline catheters 0.2% • PIV 0.5% • PICC 1.1% • Tunneled cvc 1.6% • Noncuffedcvc 1.7/2.7% • PA catheters 3.7% • Use of device • Insertion site (femoral>IJ>SC)

7. Risk factors • Risk varies based on: • Duration of catheter • PIV 3-5 days • CVC >6 days • PA catheter >3-4 days • Frequency of accesses • Use of prevention strategies • Experience and skill of individual • Patient factors

8. Ask 3 main questions • What is the nature of the infection? • What type of catheter is infected? • What is the organism?

9. DefinitionsWhat is a Catheter Related Bloodstream infection (CRBSI)? What is not a CRBSI? • Catheter colonization • Phlebitis • Exit site infection • Tunnel Infection • Pocket infection • What is a CRBSI? • Growth of same organism from percutaneous blood culture and catheter

10. More definitions • Catheter colonization-growth of organism from tip, hub or sq segment of catheter • Phlebitis-redness, warmth, tenderness along tract of catheterized vein • Exit site infection-redness, tenderness or exudate with growth at exit site • Pocket infection-infected fluid in pocket of totally implanted device • Tunnel infection-pain, redness, >2cm from catheter exit site along sq tract of tunneled catheter • Complicated Infection-metastatic foci of bloodstream infection

11. Ask 3 main questions • What is the nature of the infection? • What type of catheter is infected? • What is the organism?

12. Types of catheters Peripheral iv Midline catheter

13. Types of catheters Short term cvc Pa catheter

14. Types of catheters picc

15. Types of catheters Totally implantable device Long term cvc

16. Ask 3 main questions • What is the nature of the infection? • What type of catheter is infected? • What is the organism?

17. Empiric Treatmentcoverage for bacteria • Empiric treatment with vanc or dapto depending on hospitals mrsa mic data • Do not use linezolid empirically • Empiric GNR coverage should be based on severity of disease and presence of femoral line • Use cefepime, carbapenem, or zosyn if warranted • Only empirically double cover MDR GNR if pt is one of the following • neutropenic • severely septic • colonized/recently infected with mdrgnr • Add aminoglycoside if warranted

18. Empiric Treatmentcoverage for Candida • Only empirically cover candida if pt is septic AND one of the following • TPN • prolonged broad spectrum abx • hematologic malignancy • transplant pt • femoral site • pt colonized with candida at multiple sites • Use echinocandinOR fluconazole if pt has had no azole exposure in past 3 months

19. Microbe specific treatmentcoag negative staph • Nafcillin/oxacillin for msse • Vancomycin for mrse • Treat for 5-7 days with antibiotics if catheter removed • Treat 10-14 days with abx lock if catheter is salvaged • Some say ok to not treat if catheter is removed, pt has no hardware, and blood cx negative after catheter removal

20. Microbe specific treatmentstaph aureus • Always remove catheter • Nafcillin/oxacillin for mssa • Vanco/dapto for mrsa • Default duration of therapy is 4-6 weeks • Treat 14 days if all following apply • pt not immunosuppressed • catheter is removed • no intravascular devicesor grafts • tee negative • no evidence of metastatic infx • bacteremia resolves after 72 hours on abx • Treat 5-7 days for tip cx positive/perc blood cx negative situations

21. Microbe specific treatmentEnterococcus • Ampicillin is drug of choice if susceptible • Vanco if resistant to amp • Double coverage with aminoglycoside is controversial • 7-14 course of therapy recommended • Only tee if other signs and symptoms of endocarditis

22. Microbe specific treatmentgram negative bacilli • Carbapenem ok for all following • ESBL + ecoli/klebsiella • enterobacter • serratia • acinetobacter • ESBL – e. coli/klebsiella-use 3rd gen cephalosporin • Psuedomonas-4th gen cephalosporin, carbapenem, zosyn, +/- aminoglycoside • Stenotrophomonas- bactrim 3-5mg/kg q8hr • De-escalate asap • Duration of therapy 7-14 days

23. Microbe specific treatmentcandida • Always remove catheter (tunneled hd catheter can be exchanged over wire) • C. Glabrata and C. krusei use echinocandins • C. Albicans use fluconazole 400mg qd

24. Antibiotic lock therapywhat is it and who can get it?

25. Antibiotic lock therapywhat is it and who can get it? • For pts with long term cvc’s and uncomplicated crbsi • Always use with systemic abx • If abx lock not available, give systemic abx through the lumen of the infected catheter • Not for candida or staph aureus crbsi • Not for complicated crbsi, exit site or tunnel infx, or infx with persistent + blood cx after >72 hours of appropriate abx therapy

26. Pearls and pitfalls

27. Pearls and pitfalls • Only culture if infection is suspected • Culture before starting abx • The first day cultures are negative is day one of abx • If unable to obtain percutaneous blood cultures, drawn cultures from 2 lumens of line • Arterial lines follow the same rules as temporary cvc’s

28. Pearls and pitfalls • Do not remove catheters based on fever alone • Do not change over guidewire routinely to prevent infection • If you exchange a catheter over a guide wire and the tip and perc blood cx come back +, you must remove catheter and do fresh stick • When removing the line for suspected crbsi, culture the tip, not the sq segment • For PA catheters culture the introducer tip

29. Prevention • Only place line if necessary, use least risky line in the least risky place that will accomplish your goals • Use full body drape and aseptic technique • Prophylactic systemic abx are not indicated • For pts with hx of crbsiabx lock may be indicated for prevention • Education, education, education • Checklists

30. Treatment algorithmsuspected crbsi

31. Treatment algorithmdocumented crbsi in short-term cvc

32. Treatment Algorithmdocumented crbsi in long term cvc

33. Treatment alogrithmsuspected tunneled hd catheter infx

34. Reference • Mermel LA, Allon M, et al. Clinical Practice Guidelines for the Diagnosis and Management of Intravascular Catheter-Related Infection: 2009 Update by the Infectious Diseases Society of America. Accessed on line at: http://www.idsociety.org/uploadedFiles/IDSA/Guidelines-Patient_Care/PDF_Library/Management%20IV%20Cath.pdf