The child is a 2-year-old who fell into a pool. He was retrieved from the pool by a family member but was not breathing. The family member started CPR, and the ambulance brought him to the hospital.
What factors are important in determining the level of hypoxemia that the child may have experienced during the submersion?
Select all that apply.
Temperature of water
The weight of the child
Oxygen concentration of the ambient air
Whether or not anyone witnessed the fall into the pool
The amount of time the child was submerged
Correct Answer : A,E
The level of hypoxemia that the child may have experienced during the submersion depends on several factors, but the most important ones are:
- The **temperature of water**: Cold water can induce a diving reflex, which lowers the heart rate and oxygen consumption, and may protect the brain from hypoxic injury¹². Cold water can also cause laryngospasm, which prevents water aspiration but also impairs gas exchange.
- The **amount of time the child was submerged**: The longer the submersion, the more severe the hypoxemia and the higher the risk of brain damage and death. The survival rate decreases significantly after 5 minutes of submersion³.
The other factors are less relevant or not directly related to the level of hypoxemia:
- The **weight of the child**: This may affect the buoyancy and the ability to float or swim, but not the oxygen consumption or gas exchange during submersion¹.
- The **oxygen concentration of the ambient air**: This may affect the pre-submersion oxygen saturation, but not the rate of oxygen depletion or gas exchange during submersion¹.
- The **witnessing of the fall into the pool**: This may affect the time to rescue and resuscitation, but not the level of hypoxemia during submersion.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A) Incorrect - The APTT value being two times the control value indicates that the client's anticoagulation is within the therapeutic range. There is no need to increase the warfarin dose.
B) Correct - With the APTT value within the target range and the PT and INR values also normal, the nurse should continue the same dose of warfarin and withhold the heparin.
C) Incorrect - Decreasing the heparin dose is not indicated, as the client's APTT is already within the therapeutic range.
D) Incorrect - Increasing the heparin dose and decreasing the warfarin dose is not necessary, as the client's anticoagulation levels are appropriate.
Correct Answer is A
Explanation
A) Correct - Acute dystonic reactions are involuntary muscle spasms caused by certain medications, including antipsychotic drugs. These reactions can sometimes affect the muscles of the face and neck, including the larynx. Benztropine is an anticholinergic medication commonly used to treat acute dystonic reactions. It works by blocking certain neurotransmitters that contribute to muscle spasms, helping to relieve the symptoms.
B) Incorrect - Divalproex is an anticonvulsant medication primarily used to treat epilepsy and bipolar disorder. It is not the appropriate treatment for acute dystonic reactions. These reactions are usually caused by certain antipsychotic medications and are characterized by sudden and involuntary muscle contractions. Divalproex does not have the specific mechanism of action needed to alleviate the symptoms of acute dystonic reactions.
C) Incorrect - Isotonic crystalloid fluids are used for various purposes, such as fluid resuscitation, maintaining hydration, and balancing electrolytes. However, they are not a treatment for acute dystonic reactions. These reactions are neurological and musculoskeletal in nature and require medications with specific anticholinergic properties, like benztropine, to address the underlying issue.
D) Incorrect - Lorazepam is a benzodiazepine commonly used for anxiety, sedation, and seizure control. While it can have a relaxing effect on muscles, it is not the first-line treatment for acute dystonic reactions. Anticholinergic medications like benztropine are more appropriate because they directly counteract the neurotransmitter imbalances that lead to muscle spasms in these reactions.
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