Question for you MedFet experts

I recently came across an Austrailan movie called Sleeping Beauty. In the opening scene, a girl undergoes some kind of medical test / experiment for money. I watched the clip, but can't figure out what the "Doctor" is doing? Does anybody know if this is an actual medical test or procedure, or just something the writers came up with as an interesting visual? The link is:

https://aso.gov.au/titles/features/sleeping-beauty/clip1/

I look forward to your thoughts!

The measurement of esophageal and gastric pressures with balloon-tipped catheters has been used with great success over the past half century to delineate the physiology of the mechanical respiratory system. Pleural pressure and abdominal pressure values estimated from esophageal and gastric pressure measurements allow analysis of lung and chest wall compliance, as well as work of breathing, respiratory muscle function, and the presence of diaphragm paralysis.

To obtain the esophageal and gastric pressures a latex balloon catheter is put in place. Generally this is done by swallowing a latex balloon catheter.

I think this is the procedure seen in the movie