The devastated parents of an 8-year-old girl who choked to death at her Texas elementary school have released harrowing footage of her desperate, failed attempts to get help.

Adrian Thompson began choking during lunch at Velma Penny Elementary School in Lindale on April 15, with video released this week showing her waving her arms and gesturing for help before she sprinted to the nurse’s office, where she turned blue and collapsed, according to CBS 19.

Thompson’s parents released the disturbing footage this week after investigators ruled it an accident with “no criminal offense” committed — which they feel ignores failings to help their daughter when she clearly showed she needed it.

“If the camera footage that we were shown showed that once Adrian began choking and she got up for help and she went to the adult in charge and that they started all helping right away … I would still be devastated that Adrian passed away,” grieving mom Anna Thompson said.

“But that’s not what the camera footage shows. So, this is where we feel like people need to know about this,” she said.

The video shows Adrian standing up from her lunch table around 11:40 a.m. and starting to heave and cough into a napkin. She holds her hands near her throat as she walks through the cafeteria, clearly struggling.

“Adrian’s demeanor and actions appear to be those of someone coughing or choking,” Texas Rangers noted in their report, obtained by CBS 19.

Adrian approaches a supervising woman and motions toward her mouth. But the employee apparently misunderstood and thought she needed to vomit, walking her towards a trash can..

The staffer asked Adrian if she wanted to go to the restroom, according to the police report, with Adrian rushing out after nodding that she did.

Adrian is then seen running back into the cafeteria seconds later, waving her arms in distress at the same employee before rushing out again, before sprinting toward the nurse’s office.

The nurse told police the girl was “pointing to her mouth and trying to speak” before she began to turn “blue in the face.”

The nurse immediately began performing the Heimlich maneuver, but Adrian collapsed. The nurse then used an anti-choking device and began performing CPR when she could not find a pulse.

The school principal called 911 at 11:45 a.m. — roughly five minutes after Adrian first showed signs of choking in the cafeteria. The fire department, police and EMS rushed to the school, with the last arriving about 10 minutes after Adrian first began choking, according to the footage.

The security cameras show responders rushing her out of the school on a gurney while still doing chest compressions before loading her up in an ambulance at 11:55. The ambulance left the school at noon.

Adrian was taken to the hospital and later transferred to Cook Children’s Medical Center in Fort Worth, where she died the next day.

In the first three minutes of a choking incident, victims can feel restricted breathing, panic, and possible loss of consciousness, according to medical experts.

At four minutes, brain damage can begin and at six minutes or more cardiac or death can occur, CBS 19 reported.

The Texas Rangers’ investigation found no criminal offense was committed in relation to Adrian’s death. The medical examiner classified Adrian’s death as accidental, caused by choking.

Lindale Independent School District  Superintendent Stan Surratt told The Post the school has updated its safety procedures, provided additional staff training and implemented new policies to “help prevent a tragedy like this from happening again.”

“We recognize that no amount of preparation can eliminate every emergency. However, we remain committed to continuously evaluating our practices, identifying opportunities for improvement, and ensuring our staff members have the resources, training, and support they need to respond when emergencies arise,” he said.

Lindale is a small town of about 6,000 people located about 90 miles east of Dallas.