Reducing Blood Culture Contamination Through Standardized ED Collection Practices.

Background

Blood culture contamination (BCC) is a common and costly issue in healthcare, with significant consequences including unnecessary antibiotic use, prolonged hospital stays, and increased costs (average cost of a single contaminated blood culture is ~$4,538).³¹

• Studies have shown standardizing collection kits and utilization of diversion devices can effectively reduce contamination rate.²⁶
• Sutter Memorial Medical Center (SMMC) RNs are responsible for ~1,000+ blood cultures draws per month.
• Prior to implementation of passive diversion devices and standardized kits, ED RN drawn BCC rate ~4%.

‍

Purpose

Improve patient safety and quality of care by reducing blood culture contamination and associated costs through implementation of standardized collection kits and a passive automated diversion device, with a target contamination rate below the system goal of 2%.

‍

Setting

The project was conducted in a Level II Trauma, Stroke, and STEMI receiving center located on the West Coast. The emergency department serves a diverse and highacuity patient population requiring frequent blood culture collection as part of diagnostic evaluation.

‍

Stakeholder Team

The initiative involved a multidisciplinary stakeholder team. Emergency department nurses performed the blood culture collections and adopted the standardized workflow. Nurse educators led the development and delivery of competencybased instruction, ensuring staff were proficient with aseptic technique and correct use of the diversion device. Department leadership supported the project through resource allocation and operational oversight. Unit clerks assembled and stocked the standardized kits across clinical areas to reduce variability in equipment availability. Laboratory sent monthly contamination reports which were evaluated by ED leadership for trends and communicated this to frontline staff.

‍

Design/Methods

Process Improvement (PI) Project including:

• Blood culture collection kits are pre-assembled and stocked in each patient care area to support standardized practice and efficiency.
• Passive diversion device utilized for BC collection.
• Education and training provided during RN onboarding and reinforced with 1:1 orientation.
• Each RN is assigned an individual lab code, enabling accurate tracking and accountability for specimen collection.
• Monthly contamination reviews are conducted including:
  • Individual follow up with RNs associated with contaminated cultures.
  • Recognition of top performing staff.

‍

Outcomes

From January 2023 to March 2026, -65% change in contamination rate. Prior to implementation of kits and diversion devices contamination rate average of approximately 4%. Since implementation contamination rate is averaging 1.4%. This is 945 patient lives positively impacted. $110.2K average monthly cost saved with a cumulative $3.53M cost saved.

‍

Conclusion

Standardized collection kits and use of a passive diversion device reduced BCC, improved patient safety, and diagnostic accuracy while lowering costs. Sustained success was supported by ongoing education, feedback, and staff recognition, achieving rates below the 2% system goal.

‍

Implications

Implementation of standardized kits and diversion technology resulted in a substantial reduction in contamination rates, averaging approximately one and a half percent following the intervention. This improvement enhanced diagnostic accuracy, decreased unnecessary antibiotic exposure, and produced meaningful cost savings. For emergency nursing practice, these findings highlight the importance of consistent technique, structured education, accessible supplies, and ongoing data feedback. Leaders should prioritize reliable stocking processes, competency reinforcement, and transparency in performance data to sustain improvements. Future research may explore the influence of nurse experience, workflow interruptions, and simulationbased training on contamination prevention. Continued monitoring is anticipated to demonstrate ongoing reductions in contamination and reinforce the value of standardized blood culture collection processes in emergency care.