Bolus ( Latin bolus , from the Greek. Βώλο ком - com, piece) - a piece of partially chewed food, a liquefied pharmaceutical or other substance, liquid in the volume of one pharynx in the mouth , as well as during passage to the stomach through the pharynx , upper esophageal sphincter and esophagus .
Also, a bolus (gas bolus) is a portion of air passing from the stomach through the esophagus to the pharynx during belching or a portion of refluxate that is thrown from the stomach into the esophagus during gastroesophageal reflux . These types of boluses are studied using the impedance of the esophagus .
Standard Water
In a manometric study of the motility of the pharynx , esophagus and (or) the upper esophageal sphincter , the so-called “standard water bolus” (synonym: wet sip ) is used, which means 5 ml of room temperature water injected into the patient's mouth , for example using a syringe .
In the process of passing a standard wet pharynx to the stomach using special equipment, pressure is recorded in various parts of the gastrointestinal tract and, based on the recording, a conclusion is made about the condition of the esophagus and upper and lower esophageal sphincters .
Sources
- Medical terms. Bolus
- Bordin D.S., Valitova E.R. Methodology and clinical significance of esophageal manometry / Ed. MD, prof. L. B. Lazebnika. - M .: MEDPRAKTIKA-M, 2009 .-- 24 p.
- Castell DO , Mainie I., Tutuian R. Non-acid Gastroesophageal Reflux: Documenting its Relationship to Symptoms Using Multichannel Intraluminal Impedance (MII) . Trans Am Clin Climatol Assoc. 2005; 116: 321–334. (eng.)