Why do I have to fast before surgery? How to abstain from eating and drinking properly?

Because the prohibition of eating food before surgery is for the sake of the patient's life safety and health, if the food is eaten before the operation, it may be that the patient will react with the relevant medical supplies during the operation and affect his own life safety, so it is recommended to prohibit eating food before the operation; Gradually reduce food before surgery, abstain from drinking for four hours and eat for eight hours.

This is done to prevent regurgitation and aspiration of food in the stomach, so you should not eat for half an hour or an hour before the surgery.

Yes, only in this way can the stomach be restored to a very normal state, which is convenient for some surgery.

I think fasting is necessary because it helps the person's physical health, and it is also a prescription for surgery.

When a patient is going to undergo a large or medium-sized surgery, the doctor generally asks the patient to fast for 12 hours before surgery and abstain from water for 4 hours before surgery. A recent study by medical scientists from the Chicago University of Great Slow Ruler in the United States found that patients must abstain from eating three vegetables for a week before surgery.

Among the three vegetables is found a substance called sgas. This substance hinders the breakdown of anesthetics by enzymes in the body. Scientists combined trace amounts of SGAS with enzymes in the body that are responsible for breaking down anesthetics, and found that the enzymes lost their ability to break down anesthetics.

Scientists say that if a patient had eaten potatoes, eggplants or tomatoes before surgery, there would be residues of the substance sgas. In this way, the anesthetic used by the doctor for the patient may not be broken down normally, which will delay the recovery time of the patient and affect the speed of the patient.

The main purpose of fasting water before surgery is to empty the stomach and prevent vomiting during anesthesia and surgery, which can cause suffocation or aspiration pneumonia during anesthesia and surgery. Fasting is usually started 8-12 hours before surgery and water abstinence is started 4 hours before surgery. It is worth noting that no matter what kind of anesthesia is used, whether it is regional block anesthesia or general anesthesia, or any anesthesia such as epidural and spinal anesthesia should be routinely performed, and fasting and water should be fasted before surgery.

There are also gastrointestinal surgeries, in which the stomach contents are emptied by fasting water before surgery, which can reduce the incidence of postoperative anastomotic infection and fistula.

There is a connection between the stomach and the esophagus, called the cardia, which cannot be closed under general anesthesia. When a person lies flat, there is regurgitation if there is food in the stomach.

At the same time, patients with general anesthesia will also lose the throat reflex and cough reflex under the action of the drug.

This means that when a person is awake, if he is choked by water, he can cough and protect the water and food from entering the lungs.

However, patients with general anesthesia are unable to do this, and the food and gastric juices of gastric reflux can easily enter the lungs, which is called aspiration.

Once aspiration occurs, the aspirated solid fluid can block the airway and need to be effectively removed by doctors within a few minutes to avoid death by asphyxiation.

After resuscitation, the possibility of aspiration pneumonia is still very high, not only needs to be admitted to the ICU to continue**, but may even develop lung infection and death, and the mortality rate of aspiration pneumonia is as high as about 25%.

Therefore, fasting and drinking is a military regulation that all surgical patients must strictly abide by before surgery, otherwise, the doctor will stop the operation!

Some patients and their families are especially afraid of wronging themselves or their relatives, feeling that the operation has been very hurt, and if they don't eat enough, they will have the strength to eat secretly, and this behavior must not be given, otherwise they may pay the price of their lives.

The reason why you should fast from food and water before and after surgery is due to the following reasons:

Surgery requires anesthesia.

In the state of anesthesia, the body's functions will be uncontrolled. If you eat and drink water later after the surgery, there will be food in your stomach. Once a patient under anesthesia vomits and vomits, it will cause suffocation and cause serious injury.

In addition, for gastrointestinal surgery, if there is food in the gastrointestinal tract, it may cause infection.

Therefore, before and after surgery, it is necessary to abstain from food and water.

Fasting from food and water before surgery is due to the need for anesthesia. Some people may vomit after being anesthetized.

If there is food in the stomach, vomiting may cause aspiration pneumonia or choking. So don't let eat or drink.

The main reason for fasting and fasting before and after surgery is to eat before surgery to prevent a large amount of bowel movement after surgery. Or is it bad for the wound. If I fast after surgery, I will allow the wound to recover as soon as possible, and I will return my body to a normal state through infusion.

Fasting before surgery is because anesthesia is required during surgery, and some people may experience symptoms such as vomiting after anesthesia, and may also inhale the lungs due to vomiting, so they will not eat or drink before and after surgery.

Because a series of blood tests are usually done before surgery, and then abdominal surgery, if you eat and drink, it will affect the gas and affect the recovery of the intestines, so you should not eat water before the operation.

The reason why it is necessary to fast food and water before and after surgery is because I am afraid that it will affect the operation during the operation.

The main reason for fasting and fasting before and after surgery is to avoid reducing the number of times the patient urinates and defecates and avoids bacterial infections caused by excessive urination during or after the operation.

Because it is why it is necessary to fast and abstain from water before surgery. Because if you want to urinate and defecate during the operation week, it will cause the operation to be very troublesome and inconvenient. In addition, if you eat and drink, your stomach may be bloated, which will cause inconvenience to the operation.

Therefore, it is necessary to abstain from food and water before and after surgery. As for after the surgery, if your intestines are flatulent, the wound may collapse, so there is no need to eat or drink for the time being.

Before doing some operations, the main purpose of the patient not to drink water and not eat is mainly to consider that it is related to the following aspects, first of all, anesthesia, because if anesthesia is required for surgery, it is not possible to drink water or eat, because after anesthesia, some people may be under general anesthesia, then they may be asleep, at this time, if you drink water and eat, the objects in the gastrointestinal tract may reflux, which may block the trachea, causing the reaction of the trachea and thus affecting the respiratory function, which may seriously affect life. In addition, if you are doing some gastrointestinal surgery, you also need to fast, so that there is no content in the gastrointestinal tract, which is conducive to the operation and postoperative **, mainly considering these factors to fasting and fasting.

Because after general anesthesia, especially under the action of muscle relaxants, the muscles of the whole body, including the cardia sphincter, will relax; If you eat a lot of food or drink a lot of water before surgery, the food and water in the stomach will become gastroesophageal reflux due to relaxation of the cardia sphincter and enter the mouth. At this time, because the patient is unable to swallow under anesthesia, it is easy to cause aspiration of reflux, which can cause aspiration pneumonia and even suffocation. Therefore, it is necessary to abstain from food and water before general anesthesia surgery.

Generally, it is necessary to fast and drink for at least 4 to 6 hours before surgery, especially for patients under general anesthesia or intravenous anesthesia. In order to completely empty the stomach so that it is not dangerous to vomit during surgery. If the fasting time is not enough, there is still residual food in the stomach, once vomiting occurs during the operation, the vomit will sometimes be aspirated into the trachea, and even enter the lungs, which will cause suffocation and even life-threatening, even if it is not serious, it is easy to produce postoperative complications such as aspiration pneumonia.

Especially in patients with general anesthesia or intravenous anesthesia, the patient is unconscious, and vomiting is more likely to cause vomit to be aspirated into the trachea. Epidural anesthesia is better, the patient is conscious, and the anesthesiologist can be notified in time before vomiting, and measures are taken, and generally there will be no aspiration.

In recent years, the traditional concept of fasting for 12 hours before surgery has changed, as this method does not ensure the emptying of the stomach, which can lead to unnecessary dehydration and stress in the patient. At present, the indicators of adult patients without risk factors for aspiration are: forbidden to eat solid food for at least 8 hours; Drinking is forbidden for 2 hours before surgery; Take oral premedication 1 2 hours before anesthesia.

Commonly used pediatric fasting standards for hidden sedan chairs:

1) Newborns within 6 months of age should not drink for 2 hours before surgery;

2) Newborns within 6 months of age should not eat solid food, including milk, for 4 hours before surgery; It is 6 hours for infants from 6 months to 3 years old, and 8 hours for children over 3 years old.

The main reasons for fasting from food and water before and after surgery are:When patients are under deep sedation or general anaesthesia, their protective coughing and swallowing reflexes are diminished or absent。Relaxation of the esophageal dilator muscle makes it easy for gastric contents to reflux into the oropharynx, which can cause airway obstruction and aspiration pneumonia once aspirated into the respiratory tractAs a result, the patient has ventilation dysfunction, ** difficulty, and extremely high mortality

To put it simply, after anesthesia, if you eat it before, it is easy to vomit, and if you spit it out, it may be sucked back by you, and then block your trachea, causing a series of related problems, which is very troublesome and life-threatening.

WhileAfter surgery6 hours is usuallyNo food or waterof,There are two reasons: if the surgery causes flatulence, fasting after surgery will aggravate the flatulence; The anesthetic has not yet been exhausted, and the digestive system has not fully recovered its function

Fear of stress, and incontinence after anesthesia.