For 40 years, Providence Holy Cross Medical Center’s trauma center in Mission Hills has been serving a wide swath of northern Los Angeles County, including the Santa Clarita Valley, treating victims of gun violence, freak accidents, hiking, biking and horseback mishaps and the 2008 Chatsworth Metrolink collision.

The Mission Hills hospital recently celebrated four decades of trauma to triumph, honoring survivors, the trauma staff and the community members who help make medical advancements possible. The speakers at the event included two SCV residents who are former patients of the Mission Hills trauma center.

Keynote speaker Mia Tretta, a 19-year-old freshman at Brown University and survivor ot the 2019 Saugus High School shooting, gripped the standing-room only crowd with her story of triumph.

Tretta was shot Nov. 14, 2019, by a schoolmate at Saugus High. She was rushed to Holy Cross for surgery to remove a bullet from her abdomen, one perilously close to an artery. Her best friend and another student, as well as the shooter, died.

“As we laughed and talked, I heard a loud bang. Then a second bang and I found myself on the ground. Within milliseconds, everything became a blur of ringing, pounding and screams,” she said, recalling running for shelter. “As I ran to try and find an open door, I felt a pressure in my lower abdomen. It was wet, it was warm. I told myself, ‘Don’t look down, just keep running.’”

Tretta was airlifted to Holy Cross where she learned she was shot by a boy she didn’t know, one who came to school with his deceased father’s unsecured, loaded .45 caliber ghost gun, a homemade firearm.

Since her successful recovery, Tretta has become a national spokesperson for gun safety and returned to Providence Holy Cross to participate in Stop the Bleed education that instructs community members how to stanch blood flow until first responders arrive.

Tretta has partnered with Holy Cross Chief Executive Dr. Bernie Klein in his gun storage safety program that has given away more than 375 gun locks.

“Our trauma program has been at the forefront of providing critical care to the most vulnerable in our communities, saving countless lives and fostering a legacy of compassion and excellence in medical care. Over the past four decades, it has been a beacon of hope and healing,” said Klein,

In 1984, Providence Holy Cross Medical Center became the first trauma center serving northern Los Angeles County, and over the past four decades the trauma team has treated close to 45,000 patients. During this time treatment has advanced thanks to science, innovation, a driven trauma team and a very generous community that has contributed to continually upgrading this specialized care, said Providence officals.

Among the trauma survivors was SCV resident, Matthew Scalice, who was 15 when he suffered cardiac arrest in 2015 while swimming underwater in a friend’s pool. Scalice has asthma, and collapsed when he came up for air.

“I’m so happy to be here,’’ said Scalice, who was joined by family members. “Along with paramedics, Holy Cross saved my life. This is wonderful, such an honor.”

Dr. David Hanpeter, trauma program medical director, cared for Scalice, who spent 20 days in the hospital, 12 of those in a medically induced coma.

Michelle Koenig Barritt, the hospital’s chief philanthropy officer, credits the community for its support in life-saving trauma care.

“In my role, I’m fortunate to witness the profound impacts of generosity from our caregivers, our physicians and our donors,” Barritt said. “Over the years, donor contributions have fueled innovations, expanded services and transformed patient care experiences, allowing us to provide life-changing and life-saving services.”

Providence Holy Cross Medical Center was founded in 1961 to provide healing and health care to the San Fernando, Santa Clarita and Simi valleys. The 377-bed, not-for-profit facility, offers both inpatient and outpatient health services, including a state-of-the-art cancer center, a heart center, orthopedics, neurosciences and rehabilitation services, women’s and children’s services, as well as providing communities with a Level II Trauma Center.