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Blood Cultures

Source Blood
Mnemonic M BLOOD
Specimen Requirements

ADULT (>14 y)green FAN Aerobic and orange FAN Anaerobic bottles

Collect 10 mL per bottle. Collect 2 SETS green/orange (4 bottles) from 2 separate sites, i.e. right arm and left arm. or collect one set from patient line and one set by venipuncture. 
Always collect the green bottle first. DO NOT use yellow (pediatric) bottles for adults.

PEDIATRIC (>3 mo, <14 y): yellow Pedi-BacT FAN and orange Anaerobic FAN bottles. 
Always collect the yellow bottle first.

Small Children:1 yellow bottle (3 mL blood - minimum 1.5 mL) & 1 orange bottle (3 mL blood - minimum 1.5 mL).
Larger Children:1 yellow bottle (4 mL blood - minimum 3 mL) & 1 orange bottle (10 mL blood - minimum 3 mL).
Neonate (<3 mo): 1 yellow bottle (1.5 mL blood).

COLLECTION
Equipment:
- Check the bottom of the bottle – if it is yellow, do NOT use.  
- Draw a line on bottle indicating appropriate fill level (DO NOT
  overfill or underfill).
- Disinfect bottle tops with 70% isopropanol and allow to dry for 1
  minute. DO NOT use iodine.
- Use “butterfly” collection units. Syringe collection is not
  desirable. DO NOT use straight needle and Vacutainer.
Cleansing the Site:
- After selecting blood collection site, scrub the site with
  70% isopropanol for a minimum of 30 seconds. Allow to dry.
  Using 10% PVP Iodine, cleanse the site for 30 seconds using a
  circular motion, starting at the center of the site and moving
  outward. Allow to dry minimum 1 minute, preferably 2 minutes.
- If patient is allergic to 70% alcohol, use double application of
  PVP Iodine; if patient is allergic to iodine, use double application
  of 70% isopropanol. Allow to dry.
- Disinfect gloved finger if re-palpation of venipuncture site is 
  required.
Collection Notes:
- If other blood work is to be collected, collect the blood cultures 
  first.
- If unable to collect optimal amount, place as much blood as
  possible (up to maximum allowed for age group) into the 
  green (adults) or yellow (children) bottle first, then place
  remaining blood into orange bottle.
- Remove residual iodine from skin with 70% isopropanol after
  venipuncture.
- After collection, gently mix bottles by inversion to prevent clotting.

Specimen Handling

Blood Culture specimens must arrive at the DSC within 3.5 hours of receipt.

Keep bottles at room temperature. DO NOT refrigerate. DO NOT incubate.

Check the bottom of each bottle; if it is yellow, transport to DSC STAT (indicates possible growth in bottles).

 

Additional Information

Blood cultures should, whenever possible, be collected prior to administration of antimicrobial agents, therefore may be ordered and collected STAT.

3-sets per calendar day are ONLY permitted on patients suspected of having endocarditis or endovascular infection. Collect 3rd set at least 20 minutes after initial 2 sets.

Ordering physician must obtain Microbiologist approval (770-3757) for requests of >3 sets per calendar day, prior to collection.

Negative culture turnaround time:
Preliminary report - 48 hours
Final report - 4 days.

 

Testing Location CLS Microbiology
Testing Frequency Daily
Alternate Name(s)
Reference Interval


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