| Percutaneous endoscopic gastrostomy | |
|---|---|
 Percutaneous endoscopic gastrostomy | |
| Other names | PEG tube |
| Specialty | Gastroenterology |
| Complications | Infection,Hemorrhage,Gastrointestinal perforation, Gastrocolic fistula,Buried bumper syndrome |
| ICD-9-CM | 43.11 |
| OPS-301 code | sec |
Percutaneous endoscopic gastrostomy (PEG) is anendoscopicmedical procedure in which a tube (PEG tube) is passed into a patient's stomach through theabdominal wall, most commonly to provide a means of feeding whenoral intake is not adequate (for example, because ofdysphagia orsedation). This providesenteral nutrition (making use of the naturaldigestion process of thegastrointestinal tract) despite bypassing the mouth; enteral nutrition is generally preferable toparenteral nutrition (which is only used when the GI tract must be avoided). The PEG procedure is an alternative to open surgicalgastrostomy insertion, and does not require ageneral anesthetic;mild sedation is typically used. PEG tubes may also be extended into thesmall intestine by passing a jejunal extension tube (PEG-J tube) through the PEG tube and into thejejunum via thepylorus.[1]
PEG administration of enteral feeds is the most commonly used method of nutritional support for patients in the community. Manystroke patients, for example, are at risk ofaspiration pneumonia due to poor control over the swallowing muscles; some will benefit from a PEG performed to maintain nutrition. PEGs may also be inserted to decompress thestomach in cases ofgastric volvulus.[2]
Gastrostomy may be indicated in numerous situations, usually those in which normal (ornasogastric) feeding is impossible. The causes for these situations may be neurological (e.g.stroke), anatomical (e.g.cleft lip and palate during the process of correction) or other (e.g.radiation therapy for tumors in head & neck region).[citation needed]
In certain situations where normal or nasogastric feeding is not possible, gastrostomy may be of no clinical benefit. In advanceddementia, studies show that PEG placement does not in fact prolong life.[3] Instead, oralassisted feeding is preferable.[4] Quality improvement protocols have been developed with the aim of reducing the number of non-beneficial gastrostomies in patients with dementia.[5]
A gastrostomy can be placed to decompress the stomach contents in a patient with a malignant bowel obstruction. This is referred to as a "venting PEG" and is placed to prevent and manage nausea and vomiting.
A gastrostomy can also be used to treatvolvulus of the stomach, where the stomach twists along one of its axes. The tube (or multiple tubes) is used for gastropexy, or adhering the stomach to the abdominal wall, preventing twisting of the stomach.[2]
A PEG tube can be used in providing gastric or post-surgical drainage.[6]
Two major techniques for placing PEGs have been described in the literature.
The Gauderer-Ponsky technique involves performing agastroscopy to evaluate theanatomy of thestomach. The anterior stomach wall is identified and techniques are used to ensure that there is noorgan between the wall and theskin:
Anangiocath is used to puncture the abdominal wall through a smallincision, and a soft guidewire is inserted through this and pulled out of themouth. The feeding tube is attached to the guidewire and pulled through the mouth, esophagus, stomach, and out of the incision.[2]
In the Russell introducer technique, theSeldinger technique is used to place a wire into the stomach, and a series of dilators are used to increase the size of thegastrostomy. The tube is then pushed in over the wire.[7]
There are several techniques such as moderate sedation with left transversus abdominis plane block, and moderate sedation with local anesthetic infiltration at feeding tube site.[8]
As with other types of feeding tubes, care must be made to place PEGs into an appropriate population. The following are contraindications to PEG use:[9]
TheAmerican Medical Directors Association, theAmerican Geriatrics Society and theAmerican Academy of Hospice and Palliative Medicine recommend against inserting percutaneous feeding tubes in individuals with advanced dementia and, instead, recommend oral assisted feedings. Artificial nutrition neither prolongs life nor improves its quality in patients with advanced dementia. It may increase the risk of the patient inhaling food, it does not reduce suffering, it may cause fluid overload, diarrhea, abdominal pain and local complications, and it can reduce the amount of human interaction the patient experiences.[10]
PEG tubes with rigid, fixed "bumpers" are removed endoscopically. The PEG tube is pushed into the stomach so that part of the tube is visible behind the bumper. An endoscopy snare is then passed through the endoscope, and passed over the bumper so that the tube adjacent to the bumper is grasped. The external part of the tube is then cut, and the tube is withdrawn into the stomach, and then pulled up into the esophagus and removed through the mouth. The PEG site heals without intervention.[citation needed]
PEG tubes with a collapsible or deflatable bumper can be removed using traction (simply by pulling the PEG tube out through the abdominal wall).
The first percutaneous endoscopic gastrostomy performed on a child was on June 12, 1979, at theRainbow Babies & Children's Hospital,University Hospitals of Cleveland. Michael W.L. Gauderer, pediatric surgeon, Jeffrey Ponsky, endoscopist, and James Bekeny, surgical resident, performed the procedure on a4+1⁄2-month-old child with inadequate oral intake.[15] The authors of the technique, Michael W.L. Gauderer and Jeffrey Ponsky, first published the technique in 1980.[15] In 2001, the details of the development of the procedure were published, the first author being the originator of the technique itself.[2]
