Differentiate the techniques for rescue breathing in adults, children, and infants.

Rescue breathing techniques vary for adults, children, and infants due to differences in their anatomical and physiological characteristics. Here's an in-depth differentiation of the techniques for rescue breathing in each age group:

1. Adults:
- Explanation: For adults, the recommended technique for rescue breathing involves the following steps:
- Positioning: Ensure the victim is lying on their back on a firm surface.
- Airway Check: Open the airway by tilting the head backward and lifting the chin.
- Breath Seal: Create an airtight seal by pinching the victim's nose closed and covering their mouth with your own.
- Ventilation: Deliver a rescue breath over about one second, observing for visible chest rise.
- Compression-to-Ventilation Ratio: Follow the recommended compression-to-ventilation ratio of 30:2, meaning 30 chest compressions should be performed followed by two rescue breaths.

2. Children (Aged 1 to Puberty):
- Explanation: Rescue breathing for children involves similar steps but with a few modifications:
- Positioning: Place the child on their back on a firm surface.
- Airway Check: Open the airway by tilting the head backward and lifting the chin, but be cautious not to overextend the neck.
- Breath Seal: Create an airtight seal by covering the child's nose and mouth with your mouth.
- Ventilation: Deliver a rescue breath over about one second, watching for visible chest rise.
- Compression-to-Ventilation Ratio: The compression-to-ventilation ratio for children is also 30:2, similar to adults.

3. Infants (Up to 1 Year Old):
- Explanation: Rescue breathing for infants involves specific considerations:
- Positioning: Place the infant on their back on a firm surface.
- Airway Check: Ensure a neutral position of the infant's head and a slight chin lift without overextending the neck.
- Breath Seal: Create an airtight seal by covering both the infant's nose and mouth with your mouth or by using your mouth and nose to form a seal over the infant's mouth and nose.
- Ventilation: Deliver a gentle rescue breath over about one second, watching for visible chest rise. Ensure that the breath is small and does not overinflate the infant's lungs.
- Compression-to-Ventilation Ratio: For infants, the compression-to-ventilation ratio is 30:2. However, if the rescuer is alone, they may choose to perform 2 minutes (about 5 cycles) of CPR before activating emergency services.

4. Considerations for All Age Groups:
- Explanation: Regardless of the age group, rescuers should ensure:
- Adequate Chest Rise: Confirm that each rescue breath results in visible chest rise, indicating effective ventilation.
- Avoid Overinflation: Be cautious not to overinflate the lungs during rescue breaths, especially in infants, to prevent potential complications.
- Compression Quality: High-quality chest compressions should be prioritized, as they play a crucial role in the overall success of CPR.
- Prompt Activation of Emergency Services: Activation of emergency services should be done promptly, especially if alone.

Conclusion:
The techniques for rescue breathing in adults, children, and infants share common principles but also involve specific adaptations based on age-related anatomical and physiological differences. Rescuers should be familiar with the nuances of each age group to deliver effective and age-appropriate rescue breaths as part of the overall CPR process. Training and practice in these techniques are essential for individuals who may find themselves in a position to perform CPR on individuals of different age groups.