Release date: 2016-08-15
The stent is actually equivalent to a bridge in the bypass of the body. There are two concepts of stents used in medicine: one is for rehabilitation, and the patient who is fractured has a fixed skeleton, which is one of the support frames. What I want to say here today is that another type of interventional minimally invasive doctor uses an expansion tube, which is equivalent to placing a tubular shelf in a channel that needs to be opened, or a channel that needs to be closed, without using a knife. In the middle of this, play a role as a bridge.
The clinical application of gastrointestinal stents began in the 1990s and has been less than 30 years old. However, with this new technology, countless patients have benefited from patients who may have needed surgery. Now, by placing a thin tube and releasing a stent, different channels can be opened in the body. The "bridge" between the different "roads" is used to achieve penetration.
The esophagus is the first pass for people to enter, and the entire esophagus and intestine are connected to form a complete passage for ingestion and discharge. The esophageal bowel stent is equivalent to using a stent to bridge the patient's gastrointestinal tract.
Why should I put a stent in the gastrointestinal tract?
China is a high-risk area for cancer, especially the incidence of esophageal cancer, stomach cancer, and colorectal cancer has continued to rise in recent years. However, unfortunately, when the above diseases are diagnosed, the condition is often in the middle and late stages, and many patients have no chance of surgical resection.
With the crazy expansion of the tumor in the patient, a large number of advanced patients are prone to stenosis, or can not eat properly due to the ulceration of the tumor, causing great pain to the patient. In fact, in addition to maintaining people's own lives, eating is also a kind of enjoyment for people. So for the patient, it is a very important requirement. By using a bracket, it is possible to get through his passage, let him eat normally, and complete his excretion, which is a very big benefit for the patient.
What are the common gastrointestinal stents?
★ stomach stent
Although the incidence of gastric cancer in China is very high, there are not many opportunities to really put a stent. If the tumor is "stayed" at the entrance and exit of the patient's stomach, it is difficult to place the stent at these two places. The stent is placed at the entrance or the exit is good. It is a corner place. It is not easy to put it. It is easy. Both the inlet and the outlet are blocked, so there are certain requirements for the technique of placing the stent.
★ small intestine stent
The small intestine of the human body is six or seven meters long and is placed in the abdominal cavity, so it is difficult to place the stent in a far-reaching part. So far, after more than 20 years of research, the Tongren Hospital Interventional Team has been able to place this stent in a far-reaching place. However, in the absence of surgery, this is only about 30 cm below the duodenum. Since the intestine is not a very strong cavity, the difficulty is conceivable.
★ large intestine stent
This may be the hardest part of stent placement. The large intestine is very large, and the inside of the human intestine is band-shaped. After the obstruction, the symptoms will not appear immediately. Obstruction of the esophagus, eating can not swallow, after the intestinal obstruction, there can be a lot of things in the intestines, and after a certain period of time, it will return, so the symptoms often lag.
★ anastomotic stent
After the operation, the surgeon docks the two ends of the cut-off part, and the docking interface is narrow and prone to "land". This is mainly based on two reasons: First, the tumor is prone to recurrence and stenosis. In addition, because of scars, especially in patients with scars, the scar in the body can grow particularly hypertrophy, so it is easy to cause restenosis.
Although the esophagus and the gastrointestinal tract are both a tube, the requirements for each part are different. At present, the Tongren Interventional Team selects the stent for each stenosis based on the comprehensive evaluation of the patient, and develops a personalized stent “bridge†treatment plan.
(The author is the chief physician and professor of the Department of Interventional Imaging, Tongren Hospital, Shanghai Jiao Tong University School of Medicine, and the vice president of the Interventional Physician Branch of the Chinese Medical Doctor Association)
Source: Wen Wei Po
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