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Serious about Patient Safety: Akron Children’s Hospital Uses Lean Six Sigma and Minitab in the NICU
The hospital encourages employees across all skill levels and departments to become involved in quality improvement, offering several levels of Lean Six Sigma training. As part of its green belt training and certification, employees learn to use Lean Six Sigma by leading and completing long-term projects with the guidance of experienced black belts.
One such green belt project, which began at the hospital’s Mahoning Valley, Ohio campus, had a goal to decrease one particular safety event—unplanned extubations in the hospital’s neonatal intensive care unit (NICU). To complete this project, the hospital improvement team relied on Lean Six Sigma tactics and the data analysis tools in Minitab Statistical Software.
An intubation is a medical procedure in which a breathing tube is placed into a patient’s trachea. This tube connects the patient to a machine called a ventilator, which helps the patient breathe. The procedure is common for both pediatric patients and adults in intensive care, but is most common for premature newborn babies residing in a hospital’s NICU. Babies born prematurely often have undeveloped lungs, which cause breathing problems and the need for the assistance of a ventilator.
Although this medical procedure is commonly performed, it is not without risk, and can cause trauma to or introduce an infection into the patient’s airway. Unplanned removal of the breathing tube, which is also known as an unplanned extubation, is a likely occurrence that can cause harm. Unplanned extubations are the fourth most common adverse event in NICUs across the U.S.
Akron Children’s Hospital’s Department of Respiratory Care had been collecting data on the rate of unplanned extubations in the Mahoning Valley NICU for well over a year, but had not had the capacity to investigate the occurrences further. Bonnie Powell, a Registered Respiratory Therapist and manager of respiratory services at Akron Children’s Hospital, was a green belt candidate during the time unplanned extubation data were collected. As part of her Lean Six Sigma training and certification, she set out to lead a project that would decrease the rate of unplanned extubations in the Mahoning Valley NICU.
“I knew this project was the perfect fit for me because as a respiratory therapist, I’ve been part of the frontline staff primarily responsible for intubating,” Powell says. “When you’re the one actually putting the tube into the patient, it just affects you more because you know the trauma that you could be causing to them.”
How Minitab Helped
While there’s not a true benchmark rate that NICUs should strive to stay below regarding unplanned extubations, the Vermont Oxford Network—a research collaboration of nearly 1,000 global NICUs including Akron Children’s—considers 2 in 100 intubated patient days to be the upper limit of acceptable. Previous data collected on the rate of unplanned extubations at the Mahoning Valley NICU revealed a rate of 3 in 100 intubated days.
“Any unplanned extubation has the potential to cause harm to the patient and negatively impact overall patient satisfaction,” says Powell. “We wanted to improve our performance on this metric.”
Powell’s Lean Six Sigma project team included a multidisciplinary group of nurses, respiratory therapists, a neonatal nurse practitioner, and a neonatologist.
The team began by using Lean Six Sigma tools to brainstorm reasons why unplanned extubations were occurring, as well as solutions for stopping them. “The fishbone diagram and cause maps were among the most helpful tools we used,” Powell says. “We looked at the highest impact solutions, as well as how easy they would be to implement, and prioritized solutions from there.
“This step helped us to organize and roll out our seven improvements into two phases,” she says.
Along with more frequent communication between nurses and respiratory therapists before, during, and after an intubation, as well as educational information distributed in meetings and via email, one improvement implemented was the “two to turn” rule. “Anytime an intubated patient is repositioned, one caregiver is turning the patient and another is holding the tube at the patient’s mouth,” Powell explains.
The team applied the improvements for several months, as collecting enough data to meet the required 100 intubated days for pre- and post-improvement comparison proved difficult for many reasons.
“There is a continuing trend in neonatal care to use devices such as masks and nasal prongs to connect the patient to the ventilator to help with breathing. When these devices are used, there is no need for a breathing tube, which reduces the number of intubated days and lengthened our post-improvement data collection period,” Powell says. “That, coupled with greater attention to our weaning protocol, which focused on shortening the time babies need ventilator support of their breathing, contributed to why we saw a reduced amount of intubated days.
“Of course, fewer intubated days was a good thing in this case, and supported the idea that our improvements were working,” adds Powell.
To compare unplanned extubations, pre- and post-improvement, the team visualized their data using control charts in Minitab Statistical Software.
To verify their results statistically, the team ran a 2 proportions test in Minitab to see if their unplanned extubation rates decreased after improvements were put into place.
The analysis showed the team that after improvements were implemented, the unplanned extubation rate had indeed decreased.
The team also used Minitab to perform process capability analysis both pre- and post-improvement. This tool provided another before-and-after comparison of unplanned extubation rates, and aided the project team in assessing whether the new process was capable and in statistical control.
“I have never taken a statistics course and have no background in this type of work,” Powell notes, “but Minitab, coupled with the instruction I received from the Center for Operations Excellence, made it easy for me to analyze and understand my data.”
Trauda Gilbert, deployment leader for the Center for Operations Excellence at Akron Children’s, echoes Powell. “To be able to use Minitab to visually demonstrate the before and after effect with a control chart, which you can then share with your team and champion is really valuable. Minitab also makes it easy for front-line staff to document that they have made a statistically significant difference. To be able to do that without having to interact with a biostatistician or one of the other very rarely found statistical resources in our organization, is very beneficial,” she notes.
“Healthcare quality is a little different than manufacturing because we can’t just run a DOE and tweak a process line,” says Gilbert. “Even though we’re different, Minitab still helps us out.”
The data revealed a dramatic reduction in intubated days after the improvements were made, as well as a considerable reduction in the rate of unplanned extubations at the Mahoning Valley campus. The reductions brought their rates in line with the Vermont Oxford Network’s suggestion of 2 unplanned extubations in 100 intubated patient days.
“This project showed us that simple improvements can create real change,” says Powell. “The cultural change this project instilled in our team was exciting—the recognition that even they could make a difference is huge.”
Cost savings resulting from the reduction in supplies and staff time needed to care for unplanned extubations can be calculated, but the overall financial impacts are hard to quantify. “The larger costs of unplanned extubations—such as a longer NICU length of stay, ventilator-associated pneumonia, and other setbacks that the patient can experience from the event—can be difficult to tease out,” Powell says.
“Neonatal patients are some of our key customers here,” she continues. “Due to the fact that they were born early, they come back to our institution for care frequently, especially initially. Making sure they have a safe experience early is critical, because the results of good care at this stage can have exponential benefits for patients in the future.”
In addition to improving the patient experience, the project helped Powell obtain her Lean Six Sigma belt certification. “I did get my green belt as a result, and we’ve also rolled out selected improvements to the NICU at our Akron campus,” she says. “We’re in the process of collecting data there as well, so this project didn’t just stop in Mahoning Valley.”
Powell’s project is just one example of an estimated 300 documented projects that have been completed throughout the Akron Children’s organization. The total financial savings of the hospital’s operations excellence program is estimated to be more than $25 million since its official beginnings in 2008.
Learn more about lean six sigma in healthcare : Six Sigma Master Class – Improving Healthcare Processes
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TPMG would like to congratulate Michael Cossiart for successfully completing the Lean Six Sigma Excellence in Healthcare Delivery Black Belt Certification program and earning his lean six sigma black belt! He successfully completed the rigorous 16 unit – 65 lesson online blended lean six sigma black belt workshop by passing the certification examination with distinction. The goal of Michael’s lean six sigma black belt certification project was to improve the throughput and productive capacity of his hospital’s radiology department. His black belt project successfully eliminated 80 hours of non-productive wait time per month, decreased overtime by 44% ($245k annual savings) and increased the capacity to serve 22 more patients per month. Congratulations Michael!
Michael Cossiart serves as a Program Manager in Performance Improvement at PeaceHealth. He has more than 14 years professional experience in healthcare and served as an industrial engineer for 3 years at the Boeing Corporation.
Michael earned his Masters in Business Administration from Western Washington University and holds a Bachelors Degree in Industrial Engineering from the Oregon Institute of Technology.
The Performance Management Group’s Lean Six Sigma Excellence in Healthcare Delivery Black Belt Certification Program is specifically designed for professionals who work for healthcare clinics, hospitals and systems. TPMG has been certifying green belts and black belts for more than 15 years. The company provides lean six sigma certification on-site, online, and on-campus (at the University of Phoenix) nationwide. For more information regarding lean six sigma training, certification and consulting – contact TPMG llc at 623.643.9837 or logon to www.helpingmakeithappen.com.