Retching

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Retching
Specialty Gastroenterology

Retching (also known as dry heaving) is the reverse movement (retroperistalsis) of the stomach and esophagus without vomiting. [1] It can be caused by bad smells or choking, or by withdrawal from certain medications, or after vomiting has completed. Retching can also occur as a result of an emotional response or from stress, which produces the same physical reaction. The function is thought to be mixing gastric contents with intestinal refluxate in order to buffer the former and give it momentum in preparation of vomiting. [2] Treatments include medication and correction of the fluid and electrolyte balance.

Contents

Physiology

The retching phase is characterized by a series of violent spasmodic abdomino-thoracic contractions with the glottis closed. During this time, the inspiratory (inhalatory) movements of the chest wall and diaphragm are opposed by the expiratory contractions of the abdominal musculature. At the same time, movements of the stomach and its contents take place. Whereas a patient will complain of disagreeable sensations during nausea, speech is not possible during retching. The characteristic movements furnish a ready diagnostic sign of the retching phase. Schindler (1937) [3] studied retching on two occasions during gastroscopy and noted that longitudinal folds appeared in the previously smooth antrum, thickened quickly, came together and completely closed the antrum. [4] Retching involves a deep inspiration against a closed glottis. This, along with contraction of the abdomen, leads to a pressure difference between the abdominal and thoracic cavities. As a result, the stomach and gastric contents are displaced upwards toward the thoracic cavity. [5]

Retching comprises a rhythmically alternating (about once per second) elevation and descension of the entire pharyngolaryngo-esophago-gastric apparatus in synchrony with the movement of the diaphragm. The function of retching may be to mix gastric contents with intestinal refluxate to buffer gastric contents before gastroesophageal reflux and to impart a momentum to the gastric contents before vomiting. Airway protection during retching is accomplished by glottal closure during retches and constriction of the upper esophageal sphincter between retches. [2]

Versus vomiting

Vomiting (the expulsion of gastric contents) is usually preceded by retching, but retching and vomiting can occur separately [6] and involve different sets of muscles. [7] During a retch, thoracic pressure is decreased and abdominal pressure is increased, which may serve to position gastric contents and overcome esophageal resistance. [6] Conversely, a vomit occurs with increased thoracic and abdominal pressure. Retches and vomits are commonly lumped together in behavioral analyses and consequently the neural controls for these processes are not well delineated. [8]

Treatments

The treatments for significant retching include correction of fluid and electrolyte balance, nutritional support and medications like phenothiazines (such as Compazine and Phenergan), 5-HT3 antagonist (such as Zofran), dopamine receptor antagonists (such as Reglan), antihistamines (Antivert, and Dramamine, Benadryl) and anticholinergics (scopolamine). Alternative approaches are also available. The best-studied alternative therapy is perhaps the use of acupressure for pregnancy-related nausea and vomiting.[ citation needed ] Wristbands with acupressure buttons are commercially available. An implanted device with attached electrodes into the gastric wall can be an option for patients with refractory nausea and vomiting. [9]

See also

Related Research Articles

<span class="mw-page-title-main">Stomach</span> Digestive organ

The stomach is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates. The stomach has a dilated structure and functions as a vital organ in the digestive system. The stomach is involved in the gastric phase of digestion, following chewing. It performs a chemical breakdown by means of enzymes and hydrochloric acid.

<span class="mw-page-title-main">Peristalsis</span> Radially symmetrical contraction and relaxation of muscles

Peristalsis is a type of intestinal motility, characterized by radially symmetrical contraction and relaxation of muscles that propagate in a wave down a tube, in an anterograde direction. Peristalsis is progression of coordinated contraction of involuntary circular muscles, which is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle in the lining of the gut.

<span class="mw-page-title-main">Esophagus</span> Vertebrate organ through which food passes to the stomach

The esophagus or oesophagus, colloquially known also as the food pipe, food tube, or gullet, is an organ in vertebrates through which food passes, aided by peristaltic contractions, from the pharynx to the stomach. The esophagus is a fibromuscular tube, about 25 cm (10 in) long in adults, that travels behind the trachea and heart, passes through the diaphragm, and empties into the uppermost region of the stomach. During swallowing, the epiglottis tilts backwards to prevent food from going down the larynx and lungs. The word oesophagus is from Ancient Greek οἰσοφάγος (oisophágos), from οἴσω (oísō), future form of φέρω + ἔφαγον.

<span class="mw-page-title-main">Esophagitis</span> Medical condition

Esophagitis, also spelled oesophagitis, is a disease characterized by inflammation of the esophagus. The esophagus is a tube composed of a mucosal lining, and longitudinal and circular smooth muscle fibers. It connects the pharynx to the stomach; swallowed food and liquids normally pass through it.

<span class="mw-page-title-main">Hiatal hernia</span> Type of hernia

A hiatal hernia or hiatus hernia is a type of hernia in which abdominal organs slip through the diaphragm into the middle compartment of the chest. This may result in gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR) with symptoms such as a taste of acid in the back of the mouth or heartburn. Other symptoms may include trouble swallowing and chest pains. Complications may include iron deficiency anemia, volvulus, or bowel obstruction.

<span class="mw-page-title-main">Thoracic diaphragm</span> Sheet of internal skeletal muscle

The thoracic diaphragm, or simply the diaphragm, is a sheet of internal skeletal muscle in humans and other mammals that extends across the bottom of the thoracic cavity. The diaphragm is the most important muscle of respiration, and separates the thoracic cavity, containing the heart and lungs, from the abdominal cavity: as the diaphragm contracts, the volume of the thoracic cavity increases, creating a negative pressure there, which draws air into the lungs. Its high oxygen consumption is noted by the many mitochondria and capillaries present; more than in any other skeletal muscle.

<span class="mw-page-title-main">Pylorus</span> Part of the stomach that connects to the duodenum

The pyloruspyloric region or pyloric part connects the stomach to the duodenum. The pylorus is considered as having two parts, the pyloric antrum and the pyloric canal. The pyloric canal ends as the pyloric orifice, which marks the junction between the stomach and the duodenum. The orifice is surrounded by a sphincter, a band of muscle, called the pyloric sphincter. The word pylorus comes from Greek πυλωρός, via Latin. The word pylorus in Greek means "gatekeeper", related to "gate" and is thus linguistically related to the word "pylon".

The pharyngeal reflex or gag reflex is a reflex muscular contraction of the back of the throat, evoked by touching the roof of the mouth, back of the tongue, area around the tonsils, uvula, and back of the throat. It, along with other aerodigestive reflexes such as reflexive pharyngeal swallowing, prevents objects in the oral cavity from entering the throat except as part of normal swallowing and helps prevent choking, and is a form of coughing. The pharyngeal reflex is different from the laryngeal spasm, which is a reflex muscular contraction of the vocal cords.

<span class="mw-page-title-main">Esophagogastroduodenoscopy</span> Diagnostic endoscopic procedure

Esophagogastroduodenoscopy (EGD) or oesophagogastroduodenoscopy (OGD), also called by various other names, is a diagnostic endoscopic procedure that visualizes the upper part of the gastrointestinal tract down to the duodenum. It is considered a minimally invasive procedure since it does not require an incision into one of the major body cavities and does not require any significant recovery after the procedure. However, a sore throat is common.

<span class="mw-page-title-main">Mallory–Weiss syndrome</span> Bleeding from a laceration in the mucosa at the junction of the stomach and esophagus

Mallory–Weiss syndrome or gastro-esophageal laceration syndrome refers to bleeding from a laceration in the mucosa at the junction of the stomach and esophagus. This is usually caused by severe vomiting because of alcoholism or bulimia, but can be caused by any condition which causes violent vomiting and retching such as food poisoning. The syndrome presents with hematemesis. The laceration is sometimes referred to as a Mallory–Weiss tear.

<span class="mw-page-title-main">Dumping syndrome</span> Medical condition

Dumping syndrome occurs when food, especially sugar, moves too quickly from the stomach to the duodenum—the first part of the small intestine—in the upper gastrointestinal (GI) tract. This condition is also called rapid gastric emptying. It is mostly associated with conditions following gastric or esophageal surgery, though it can also arise secondary to diabetes or to the use of certain medications; it is caused by an absent or insufficiently functioning pyloric sphincter, the valve between the stomach and the duodenum.

<span class="mw-page-title-main">Rumination syndrome</span> Medical condition

Rumination syndrome, or merycism, is a chronic motility disorder characterized by effortless regurgitation of most meals following consumption, due to the involuntary contraction of the muscles around the abdomen. There is no retching, nausea, heartburn, odour, or abdominal pain associated with the regurgitation as there is with typical vomiting, and the regurgitated food is undigested. The disorder has been historically documented as affecting only infants, young children, and people with cognitive disabilities . It is increasingly being diagnosed in a greater number of otherwise healthy adolescents and adults, though there is a lack of awareness of the condition by doctors, patients, and the general public.

<span class="mw-page-title-main">Esophageal hiatus</span>

In human anatomy, the esophageal hiatus is an opening in the diaphragm through which the esophagus and the vagus nerve pass.

Retroperistalsis is the reverse of the involuntary smooth muscle contractions of peristalsis. It usually occurs as a precursor to vomiting. Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex. Retroperistalsis begins in the small intestine and pyloric sphincter. Food then moves in the opposite direction, often from the duodenum into the stomach.

<span class="mw-page-title-main">Vomiting</span> Involuntary, forceful expulsion of stomach contents, typically via the mouth

Vomiting is the involuntary, forceful expulsion of the contents of one's stomach through the mouth and sometimes the nose.

Gastric volvulus or volvulus of stomach is a twisting of all or part of the stomach by more than 180 degrees with obstruction of the flow of material through the stomach, variable loss of blood supply and possible tissue death. The twisting can occur around the long axis of the stomach: this is called organoaxial or around the axis perpendicular to this, called mesenteroaxial. Obstruction is more likely in organoaxial twisting than with mesenteroaxial while the latter is more associated with ischemia. About one third of the cases are associated with a hiatus hernia. Treatment is surgical.

<span class="mw-page-title-main">Gastroparesis</span> Medical condition

Gastroparesis, is a medical disorder consisting of weak muscular contractions (peristalsis) of the stomach, resulting in food and liquid remaining in the stomach for a prolonged period of time. Stomach contents thus exit more slowly into the duodenum of the digestive tract. This can result in irregular absorption of nutrients, inadequate nutrition, and poor glycemic control. The opposite of this, where stomach contents exit quickly into the duodenum is called dumping syndrome.

<span class="mw-page-title-main">Nausea</span> Medical symptom or condition

Nausea is a diffuse sensation of unease and discomfort, sometimes perceived as an urge to vomit. While not painful, it can be a debilitating symptom if prolonged and has been described as placing discomfort on the chest, abdomen, or back of the throat.

The nervous system, and endocrine system collaborate in the digestive system to control gastric secretions, and motility associated with the movement of food throughout the gastrointestinal tract, including peristalsis, and segmentation contractions.

<span class="mw-page-title-main">Human digestive system</span> Digestive system in humans

The human digestive system consists of the gastrointestinal tract plus the accessory organs of digestion. Digestion involves the breakdown of food into smaller and smaller components, until they can be absorbed and assimilated into the body. The process of digestion has three stages: the cephalic phase, the gastric phase, and the intestinal phase.

References

  1. ↑ "Vomiting and Nausea". eMedicine . February 12, 2012.
  2. 1 2 Lang, IM; Dana, N; Medda, BK; Shaker, R (September 2002). "Mechanisms of airway protection during retching, vomiting, and swallowing". American Journal of Physiology. Gastrointestinal and Liver Physiology. 283 (3): G529-36. doi:10.1152/ajpgi.00062.2002. PMID   12181164.
  3. ↑ Schindler, R (1937). Gastroscopy. Chicago: University of Chicago Press. p. 145.
  4. ↑ Keet, AD (1998). "Nausea, Retching, and Vomiting". The Pyloric Sphincteric Cylinder in Health and Disease. PLiG. p. 122.
  5. ↑ Berne, Robert M.; Matthew N. Levy (2004). Physiology. Elsevier Mosby. p. 557. ISBN   0-323-03390-3.
  6. 1 2 Andrews, PL; Davis, CJ; Bingham, S; Davidson, HI; Hawthorn, J; Maskell, L (February 1990). "The abdominal visceral innervation and the emetic reflex: pathways, pharmacology, and plasticity". Canadian Journal of Physiology and Pharmacology. 68 (2): 325–45. doi:10.1139/y90-047. PMID   2178756.
  7. ↑ Grelot, L; Miller, AD (1994). "Vomiting - Its Ins and Outs". News in Physiological Sciences. 9 (3): 142–147.
  8. ↑ Horn, Charles (11 October 2007). "Why is the neurobiology of nausea and vomiting so important?". Appetite. 50 (2–3): 430–434. doi:10.1016/j.appet.2007.09.015. PMC   2274963 . PMID   17996982. nihmsid: NIHMS42868.
  9. ↑ Porter, Ryan F.; Gyawali, C. Prakash. "Nausea and Vomiting". Patient Education & Resource Center. American College of Gastroenterology.
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