Too far and you may severely damage bones and organs, not enough and the compressions may not be effective.
(The breaking of some ribs during CPR is somewhat expected, but you don't want to crush organs or anything like that.)
Compress 30:2 breath with 5 cm depth
Compress the infant's chest about 1/2 to 1 inch for CPR chest compressions.
Yes, you should compress the chest when performing CPR on an adult. Chest compressions are crucial for maintaining blood flow to vital organs during cardiac arrest. Compress the center of the chest at a depth of about 2 to 2.4 inches and at a rate of 100 to 120 compressions per minute. Ensure that you allow the chest to fully recoil between compressions to maximize blood circulation.
Compression depth does not affect the recoil ability of the chest; compress 1/2 to 1 inch for infant, 1 to 1 1/2 inches child and 2 inches for an adult.
The depth of chest compressions in child CPR is 1 to 1 1/2 inches. A child is about 1 to 8 years old.
Compress a child's chest 1 - 1 1/2 inches per compression.
Compress a child's chest 1 - 1 1/2 inches per compression.
Depth of water
Chest compressions on adults should be 1 1/2 to 2 inches deep.
The frost line depth for Nacogdoches, TX is typically around 12-18 inches. This is the depth at which the ground is expected to freeze during the winter months. It's important to consider this depth when planning construction projects to avoid issues with freezing and thawing of the soil.
During chest compressions, you should compress the chest at least 2 inches (5 cm) deep for adults, while allowing full recoil between compressions. For children, compressions should also be about 2 inches, and for infants, approximately 1.5 inches (4 cm). The compressions should be performed at a rate of 100 to 120 compressions per minute. Proper depth and rate are crucial for effective blood circulation during cardiopulmonary resuscitation (CPR).
Usually when you cannot get close enough to create a large enough image with a shorter lens, or wish to compress the depth of field.