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# IE 8570 University of Nebraska Module 5 Health Safety and the Environment Questions Nursing Assignment Help

I’m working on a health & medical writing question and need the explanation and answer to help me learn.

1. Assume we have a group of workers in a factory and many of them already have a respiratory

illness. We want to design a study to evaluate if exposure to some specific factor relates to the

illnesses. What study design should we use and how would we conduct the study?

2. Imagine that an industrial hygienist and a safety engineer identify that there is an exposure to

a new chemical that represents a major health hazard in your factory. They immediately

recommend that all of the employees exposed to the chemical use a specific and appropriate type

of PPE. Is this the only thing they should do? What other control measure should we consider

and potentially implement as management of the factory? Why?

3. What is indicated by a LD-50? What is indicated by ED-50? What might it mean if the ED50 equals the LD-50?

## Expert Solution Preview

Introduction:
In this situation, as a medical professor, I am tasked with designing college assignments and answers for medical college students. Additionally, I am responsible for conducting lectures, evaluating student performance through examinations, and providing feedback. In this scenario, I will provide answers to the given questions related to occupational health and safety.

To evaluate if exposure to a specific factor relates to respiratory illnesses in the workers, the most appropriate study design would be a cohort study. The cohort study involves selecting a group of workers who are exposed to the specific factor (exposed group) and another group of workers who are not exposed to the factor (unexposed group).

To conduct the study, we would follow these steps:
1. Identify the population: Identify the workers in the factory who are at risk of exposure to the specific factor and have a respiratory illness.
2. Define the exposure: Clearly define and identify the specific factor to which the workers are exposed.
3. Select the exposed and unexposed groups: Select workers who are exposed to the specific factor and workers who are not exposed. Ensure both groups are comparable in terms of demographics and other relevant factors.
4. Collect data: Collect data on respiratory illnesses from both the exposed and unexposed groups. This can be done through medical records, interviews, or health assessments.
5. Follow-up: Follow the workers over a period of time to determine the occurrence of respiratory illnesses in both groups.
6. Analyze and compare: Analyze the data to assess the relationship between exposure to the specific factor and the occurrence of respiratory illnesses. Statistical methods can be used to calculate measures of association such as relative risk or odds ratios.

No, recommending the use of personal protective equipment (PPE) is not the only control measure that should be implemented. In addition to requiring employees to use appropriate PPE when exposed to the new chemical, other control measures should also be considered and potentially implemented.

One important control measure is engineering controls. These controls focus on eliminating or minimizing the exposure to the hazardous chemical at the source. For example, implementing ventilation systems or enclosure systems that effectively remove or contain the chemical can greatly reduce exposure risks.

Administrative controls should also be considered. These controls involve changes in work practices, procedures, and policies to reduce the risk. Examples include implementing strict handling protocols, providing adequate training on the safe handling of the chemical, and enforcing proper hygiene practices.

By implementing a combination of engineering controls, administrative controls, and the use of appropriate PPE, the management of the factory can effectively minimize the risk of exposure to the new chemical and ensure the safety and health of the workers.

LD-50, or the median lethal dose, refers to the dose of a substance that is estimated to cause the death of 50% of the test animals (usually mice or rats) during a specified period. It is a measure of acute toxicity, indicating the potency of a substance to cause death.

On the other hand, ED-50, or the median effective dose, refers to the dose of a substance that produces a specific therapeutic effect in 50% of the individuals or test subjects. It is a measure of the therapeutic efficacy or potency of a substance.

If the ED50 equals the LD-50, it suggests that the substance in question has a narrow safety margin. This means that the dose required to produce the desired therapeutic effect is very close to the dose that can potentially cause death or toxicity. In such instances, caution should be exercised, and careful monitoring is essential to avoid adverse effects or overdose.

Overall, understanding the LD-50 and ED-50 values helps in assessing the toxicity and effectiveness of substances, enabling healthcare professionals to make informed decisions regarding their use and administration.

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