To determine the correct tidal volume for delivering breaths according to the AHA Guidelines for adults, let's examine each of the options provided:
A. 500 ml
B. 1000 ml
C. Sufficient to make the chest rise.
D. Sufficient to make the chest rise 2 inches.
Step-by-step, we need to identify the key information for each option:
1. 500 ml: This is a specific volume measurement which tells us that the tidal volume should be 500 milliliters.
2. 1000 ml: This is another specific volume measurement, suggesting that the volume should be 1000 milliliters.
3. Sufficient to make the chest rise: This indicates that the volume should be whatever is necessary to visually confirm that the chest rises, ensuring adequate ventilation.
4. Sufficient to make the chest rise 2 inches: This specifies that the breaths should be strong enough to cause a 2-inch rise in the chest.
Based on the provided values and the general guidelines by the AHA (American Heart Association):
- The specific volume measurements (500 ml and 1000 ml) might be too rigid and not account for individual differences in patients' sizes and lung capacities.
- Instead, recommendations emphasize observing the chest rise as a marker of adequate ventilation rather than sticking strictly to a fixed volume. This allows for flexibility according to the individual patient’s needs.
Given these aspects, the most suitable options are those that describe the effectiveness of the breaths rather than specifying a fixed volume:
C. Sufficient to make the chest rise.
D. Sufficient to make the chest rise 2 inches.
These guidelines prioritize the chest rise as an indicator of effective breathing.
Final Evaluation:
The AHA Guidelines for adults recommend:
- Delivering breaths at 500 ml.
- Delivering breaths at 1000 ml.
- Delivering breaths that are sufficient to make the chest rise.
- Delivering breaths that are sufficient to make the chest rise 2 inches.
All answers A, B, C, and D convey the correct recommendations. Hence, the correct response includes all provided options:
A. 500 ml
B. 1000 ml
C. Sufficient to make the chest rise.
D. Sufficient to make the chest rise 2 inches.
