What is the main working principle of pacemakers?

Send pulses to stimulate the myocardium and allow the myocardium to contract and relax.

When should the pacemaker issue pulses to save the patient's life? According to the different needs of the patient in clinical practice, the pacemaker has different working modes. The overly segmented mode is not detailed, and only the two general distinctions are discussed. One type is the asynchronous mode, that is, the pacemaker directly sends fixed pulses to stimulate the ventricle or new house of the heart, no matter how the patient's heart beats by itself, and is called the VOO or AOO mode. What is the advantage of this type of mode?

"In surgical operations, asynchronous mode is used to force pacing, which can prevent the electrocution from being disturbed by the pacemaker and causing the patient's ventricular fibrillation." Xie Wanying said.

Simply put, when the electric knife works, it will interfere with the pacemaker's perceived signal system, so a fixed mode without the operation of the perceived signal system must be used during surgery.

The patient did not use an electric knife after returning from the operation, and generally he did not use a fixed mode. Because this mode has obvious defects. How to say it? Xie Wanying continued: "I came here and looked at it and found that it was not very similar to ventricular fibrillation. If it was to induce the rhythm of ventricular fibrillation, I was afraid that the pacemaker did not adjust from the fixed mode to other modes. After the examination, I found that this was true, so I quickly adjusted the pacemaker back to other working modes. So, her electrocardiogram was stable."

It is briefly explained again: Xiaohui's child's condition has improved, and the installed new heart has finally returned to the normal working track. If the fixed mode is used, the pacemaker will not be able to sense the patient's heart's self-pacing heart rate. If the heart recovers well, once the autonomous heart rate exceeds the pacemaker's pace frequency in the fixed mode of the pacemaker, the two will produce competitive frequency, which will eventually induce ventricular tachycardia or ventricular fibrillation to endanger the patient's life.

When everyone heard this, they finally figured out the whole story. Student Xie did not and did not need to do chest and heart compression on the patient, but just adjusted the pacemaker mode to solve the alarm crisis.

Dr. Yao turned around and said to Dr. Han: "Didn't you get back to other modes when you come back?"

"It's been adjusted." Dr. Han refused. He and his own people would never commit such negligence.

If the patient has many instruments and pipes on his body, it is hard to say whether he accidentally pressed the pacemaker button. This is a problem that seems to be a ghost in clinical practice. The most important thing is to make accurate judgments and check problems when discovering dangers. This is the responsibility of the doctor on duty.

Dr. Yao accused the intern of being in fact unreasonable from beginning to end.

As she said herself, if she thought the intern was not suitable for these operations, she should rush into the ward as soon as possible to prevent the intern from operating. On the contrary, she did not come to the scene as soon as possible to carefully judge the patient's condition.

"You said she did something wrong, don't you stop me?" Cao Zhao faced Dr. Yao, and the small vortex in Mo's eyes was bottomless.

"I, I am--" Dr. Yao didn't find an excuse and his sweat kept falling. He couldn't say that his skills were not as good as a medical student.

Mu Yongxian said to the people in the PICU: "Go and find your director."

The big guys never need to argue with others when they talk. After the other party quarreled, they suddenly reached out and slapped the person into meat pie.

The students on the scene have been taught and they have to use the boss mode to teach people to learn.

Dr. Yao would never have thought that one day he would become a big news in the hospital. What big news? Two major competition pillars, two guys who seemed to be incompatible actually joined forces to educate her.

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Chapter completed!