Cricoid Pressure May Minimize Symptoms of Reflux (LPR)

Specifically throat symptoms attributable to reflux such as globus, throat-clearing, phlegmy throat, chronic cough, etc. However, cricoid pressure may not be realistic nor practical even if it does help.

In one of the more unusual studies I have seen, researchers deliberately infused 60 cc of hydrochloric acid into the esophagus of 14 patients who suffered from LPR as well as 12 healthy controls. 9 patients exhibited confirmed LPR (laryngopharyngeal reflux) events, but none in the control group. With moderate sustained cricoid pressure (20-30 mmHg), only one patient had a confirmed LPR event.

Theoretically, why would cricoid pressure work?

The cricoid cartilage is located immediately below the voice box. It is a circular cartilage that is right at the level where the throat connects to the esophagus. By putting pressure on the cricoid cartilage, the top part of the esophagus is manually compressed shut which theoretically would prevent reflux from regurgitating up into the throat.

It is based on this theory that anesthesiologists often perform cricoid pressure to prevent aspiration during intubation for surgery, especially if a patient is suspected of drinking/eating something prior to surgery.

The problem with cricoid pressure is that in order for this to work, it needs to happen continuously which may make it unrealistic and impractical for patients who suffer from LPR. Continuously means 24/7/365. Not just when symptoms are present (because it's too late than).

Reference:
Prevention of esophagopharyngeal reflux by augmenting the upper esophageal sphincter pressure barrier. Laryngoscope. 2014 Apr 29. doi: 10.1002/lary.24735.