"The amount of gas dissolved in solution is directly proportional to the pressure of the gas over the solution." is: Flashcards
“The amount of gas dissolved in solution is directly proportional to the pressure of the gas over the solution.” is:
Henry’s Law.
Henry’s Law is demonstrated in the occurrence of:
Decompression sickness.
Under conditions of slow decompression (normal ascent):
Excess nitrogen is vented off harmlessly by the lungs.
What is the most common manifestation of decompression sickness?
Bends.
The symptom of bends, dull, aching pain in the bones or joints:
Tends to be progressive and becomes worse if ascent is continued.
What is a symptom for paresthesia (creeps)?
Tingling and itching.
Chokes, as a manifestation of decompression sickness, are:
Rare, but very dangerous.
Type II decompression sickness results from nitrogen bubble formation affecting the:
Central nervous system.
What is the threshold altitude for the onset of decompression sickness?
18,000 ft.
Studies have shown that there is an approximately threefold increase in the likelihood to experience symptoms of DCS between the ages of:
19 to 25 and 40 to 45.
Increased nitrogen content from scuba diving can result in DCS at altitudes as low as:
8,000 feet.
If a person is motionless, what is the very first thing you should do?
Check for responsiveness.
When should you call 9-1-1 if an adult victim is unresponsive?
Immediately upon discovering they are not breathing.
Perform chest compressions:
On a firm, flat surface.
What is an appropriate rate of chest compressions for an unresponsive adult?
100-120 compressions per minute.
After performing 30 chest compressions, what should you do before attempting rescue breaths?
Open the person’s airway.
Proper technique for performing rescue breaths consists of:
Forming a seal over the person’s mouth with your mouth.
An easy way to remember the order and procedure for CPR is to recall:
C-A-B: Compressions, Airway, Breaths.
The universal sign to indicate you are choking is:
Clutching your neck.
Before performing the Heimlich maneuver on a person who appears to be choking, you should first:
Ask them if they are choking.
To perform the Heimlich maneuver, stand behind the victim, reach around their waist with both arms, and place your fist:
Against their abdomen, just above their navel.
Electrical impulses control what aspect of the heart’s operation?
The rate at which it beats.
The most common abnormal heart rhythm causing cardiac arrest in adults is:
Ventricular fibrillation (V-fib).
Time is a crucial factor in saving a life when the heart stops. For every minute that defibrillation is delayed, the chance of survival decreases by:
7-10%.