When assessing circulation in an adult, you should take no more than 10 seconds to check for signs such as skin color, temperature, and capillary refill time. The capillary refill test should ideally take about 2 seconds or less for a normal response. If there are indications of poor circulation, further assessment and intervention may be necessary.
2 seconds
The fetal circulation is based mainly on the veinous circulation during pregnancy. Once the uterine connections are lost, the adult circulation takes over.
1 breath every 5 seconds for an adult.
1 breath every 3 seconds
The ductus arteriosus and foramen ovale are important for systemic circulation. This is the type of circulation maintained by fetal pigs but the adult heart requires pulmonary and systemic circulation.
The ductus arteriosus and foramen ovale are important for systemic circulation. This is the type of circulation maintained by fetal pigs but the adult heart requires pulmonary and systemic circulation.
In fetal circulation, the placenta provides oxygen and nutrients to the fetus, so the lungs are not used for oxygen exchange - instead, a bypass called the ductus arteriosus shunts blood away from the lungs. After birth, the lungs take over oxygen exchange, the ductus arteriosus closes, and the foramen ovale between the atria closes, redirecting blood flow through the heart to support pulmonary circulation.
6.8
Give breath over a period of 1 second.
For children and infants: once every three seconds For adults: once every five seconds
25 seconds.
You do not check for signs of circulation as a first aider, if they are not breathing then you perform 30 compresions at a rate of 100/minute followed by 2 rescue breaths regardless of whether they have signs of circulation (In a chilld you would also perform 5 rescue breaths before you start CPR). this is because even if they have circulation, if they're not breathing then they won't have circulation for long and CPR will do less harm than thinking there are signs of circulation when there aren't and not performing CPR.