Biology 8 Lesson 23: Practice: CPR
1. Summary of theory
– Causes of respiratory interruption: There are many causes of respiratory interruption such as: drowning, electric shock, being in an environment without air or with many toxic gases.
- Harm: Water entering the lungs prevents gas exchange in the lungs.
- Treatment: Remove the victim from the drowning area.
- Effects: Causes spasticity of the respiratory muscles, disrupting the ventilation process in the lungs.
- Treatment: Find the location of the circuit breaker to disconnect the power, separate the victim from the power source
c. The environment lacks air or has many toxic gases
- Harm: Lack of oxygen to the body, hindering gas exchange.
- Treatment: Remove victim from the area.
2. Practice Procedure
In daily life, we sometimes encounter cases where the victim stops breathing, stops the heart due to some reason such as drowning, asphyxiation, electric shock… Before transferring the victim to a medical facility, it is possible to Maintain the victim’s life or help the victim with first aid movements.
a. Method of suffocation
– When the victim stops breathing (it is observed that the victim’s chest does not rise and fall), immediately perform artificial respiration on the spot until he can breathe on his own or determine that the victim is definitely dead, then stop. again.
+ Steps to take
- Place the casualty in a supine position with the head tilted back.
- Cover the victim’s nose with two fingers.
- Take a full breath in your chest, then bring your lips close to the victim’s mouth and blow as hard as you can into the victim’s lungs to prevent air from escaping out of contact with the mouth.
- Listen to the out-breath
- Blow continuously 12-20 times/minute until the victim’s self-respiration is stabilized normally
+ Note: If the victim’s mouth is hard to open, you can cover the mouth with your hand and blow into the nose.
b. Chest compression method
– When the victim is in cardiac arrest (putting his ear to his chest, he can’t hear the heart beat and the pulse can’t be felt), immediately give first aid to the victim on the spot by squeezing the heart outside the chest.
– How to proceed
- With the victim lying on a hard surface, the person conducting the cardiac compression kneels on the victim’s left side.
- The two hands overlap and then place in front of the heart, corresponding to the point between the nipples or the 4-5 intercostal space on the left chest.
- Slowly press down about 1/3 to half the thickness of your ribcage, then loosen your arms.
- Adults and children over 1 year old, the number of chest compressions per minute is about 100 times. Children under 1 year old, more than 100 times per minute. Newborns may require up to 120 compressions per minute.
3. Report on group practice results
The groups take turns to evaluate the performance report
First and last name ………….
After completing this lesson, you should:
- Understand the scientific basis of CPR.
- Determine the sequence of artificial respiration.
- Know how and practice the method of breathing and chest compressions.