The Rangers turned to their internal youth to resuscitate the team after an alarming finish to their four-game road trip, but it did not prevent the club from losing its third straight game.

A more dramatic change was deemed necessary by the hierarchy, even before the Blueshirts’ 5-2 loss to the Blues on Monday night at Madison Square Garden.

The Post confirmed that president and general manager Chris Drury sent a memo to all 31 of his NHL counterparts announcing that the Rangers are open for business, specifically citing multiple players as available, not merely their longest-tenured player, Chris Kreider, and captain, Jacob Trouba.

As Sportsnet’s Elliotte Friedman first reported, the Blueshirts have made it known that they are looking to shake things up.

“We need to be better,” Head coach Peter Laviolette said when asked if he thinks his veteran leaders are leading right now. “Everyone needs to be better inside the room. It’s not good enough, what we’re doing. I don’t think anybody is going to sit here and say it was good enough. No matter what question you want to ask, it’s got to be better.

“It’s three games in a row where we’re playing to a level and a standard that’s not us and not what we work to be, not what we want to be. It’s got to get better. Everybody’s got to get better.”

Surrendering three games in a row is something the Rangers did only once last season, when they dropped four straight from January 6-13.

A myriad of issues have been mounting for over a month now, however, which is why management didn’t need to watch the Rangers fall to a St. Louis team that had lost seven of its past nine games to know that adjustments have to be made.

Coincidentally, Kreider did not suit up for Monday’s game against the Blues. The Rangers said Kreider, who is in his 13th season in New York and has a 15-team no-trade list in his contract, is day-to-day with an upper-body injury.

That, paired with Filip Chytil’s continued absence due to a non-concussion injury, opened the door for some major line changes and a call to AHL Hartford to bring up and play Matt Rempe and Brett Berard, who made his NHL debut Monday night.

Since the Czech center is still not ready to play, Kaapo Kakko got an official shot in the middle.

The 23-year-old Finn lined up between Adam Edstrom and Reilly Smith, which effectively bumped Jonny Brodzinski from the lineup.

“A little different,” Kakko told The Post of the switch before the Oilers game, reflecting on the brief stretch he played center in Calgary. “It’s been awhile, maybe last time in Finland I played center. It’s something new. I think it was kind of nice. I feel good about it.”

While the Artemi Panarin-Vincent Trocheck-Alexis Lafreniere line remained intact — albeit getting outshot 10-4 in the loss, per Natural Stat Trick — Cuylle was bumped up to play alongside Berard and Mika Zibanejad.

After Zibanejad finished minus-four for the third time this season in Edmonton, the Swede was minus-three on Monday despite finding himself between two youngsters who have both been playing particularly well in their respective seasons.

Cuylle continues to be a bright spot for the Rangers, especially this night amid all the outside noise.

The second-year Ranger has been a force almost every single night since the start of the season, and he delivered again Monday night with his fifth multi-point performance of the season and first multi-goal game of his burgeoning NHL career.

As the organization’s tides begin to move in favor of the young core, the 22-year-old Cuylle has made his way to the front to spearhead the initiative.

It was quiet at first, but recently Cuylle has been banging the drum by way of his consistently effective play, as if to say, ‘I’m ready for more.’

Cuylle’s nine five-on-five goals lead the Rangers, which is a notable statistic that doesn’t even capture how effective his all-around game has been.

“He’s had a heck of a year, so he made it really easy on me tonight,” Berard said of his former Wolf Pack teammate.

This type of shake-up signifies that the Rangers hierarchy is restless to right the ship.

There has been growing disappointment with the Blueshirts, and the organization has made its first act of change.

Calling upon the kids could just be the first step.