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“Flowing” Case Carts to the Operating Room

Case Studies

For: 1,100 Bed Metropolitan Hospital with 50+ Operating Rooms

Situational Challenge

Ensuring that all supplies and instruments reach the Operating Room in a timely manner is not easy, but the layout of the central sterile supply department coupled with the department’s size and lack of flow, made it even more challenging. Emergent cases and OR service calls that routinely occurred during the case cart build time, further complicated the situation.

The case cart assembly process includes gathering material from surgical packs, supplies, and instruments then entering the completed cart into the system and delivering the cart to the OR. Each staff member was responsible for completing a case cart from start to finish by picking supplies from a 27,000 square foot supply department. Case carts were continually arriving late at the ORs, delaying surgeries by as much as 2.5 hours. Some were also arriving with missing or incorrect supplies and instruments.

A key improvement goal was to deliver all case carts, accurately assembled, for the day’s scheduled surgeries by 0730 (the first case start-time).

The Process

To complete each cart, pickers had to travel the length of the department several times. The process was highly variable, and each picker completed tasks in different amounts of time.

A team was established to review and improve the process. With assistance from the Productivity Healthcare consultant, the team developed a “flow cell” design to eliminate variation in picking times and diminish the distance each picker had to travel for a single build. The layout of the department and the picking process were redesigned for easy flow of the case cart from one process step to the next.

Flow Cell Design in Central Supply

The process was broken down into 4 sub-processes – surgical packs, supplies, instruments, and enter/delivery. After each case cart is loaded at the first station with the required items (surgical packs), the picker at that station moves it into a standard work in process (SWIP) lane to be worked on by the picker at the next station (supplies), and so on. When the instrument picker (third station) completes the cart, he or she moves it to the system entry and delivery SWIP lane. There, the system entry picker matches it up and delivers it to the correct OR.

As with any process, all process times were not exactly in sync. To level the times between each process step, pickers flexibly move to work upstream and downstream as needed. When a picker moves a case cart into the upstream SWIP lane and sees that all three lanes are full, he or she “flexes” forward to pick the required supplies or instruments. When a picker finds their SWIP lane empty, they flex back to assist the previous process.

In this new design, each picker is now responsible for a single station, and carts move sequentially from station to station. The new process and flexing of pickers resulted in a consistent, reliable flow of case carts to completion.

Improvements, Benefits and Key Outcomes

With the new flow/cell design, carts are being delivered 100% accurately, ahead of schedule, and with improved ergonomics for the pickers and reduced costs.

The numerous improvements and cost savings achieved in Central Supply and in the Operating Rooms include:

Case cart build time was reduced from a range of 8-15 minutes to < 4 minutes; case cart delivery improved 100%; case carts are 100% defect free (no missing or incorrect supplies); walking distance to complete a case cart reduced from 864 feet to < 200 feet; production control board displays hourly status of case carts completed; number of pickers reduced from 6 to 3 with extra staff redeployed to other areas of the department. Many ergonomic improvements also resulted: the team reduced the NIOSH lift index (a measure of physical stress) by 0.34 (nearly 20%), and worker’s compensation cases due to lifting instrument trays fell by more than 50%. In addition, employee satisfaction scores improved by 75% and the response from OR staff was overwhelmingly positive. Before improvement, case carts routinely arrived late. Afterward, all case carts arrived a full two hours prior to first case start time.

Other Key Improvements and Outcomes:

  • Case carts accurately assembled and delivered on time
  • Improved staff satisfaction and safety
  • Significant cost savings
  • Staff freed up for new assignments

Project Duration

  • 3months