Discussion:Use of an Experimental Group Design

Discussion Response in apa format
1)Given that there is a documented advantage to the use of an experimental and control group design, discuss why other designs are frequently used, and the situations that may prompt the use of one.200 words, APA

2)Discuss your understanding of the concept of internal validity in a research study, and the impacts of several errors or biases that can reduce the study’s validity.200 Words APA

Pulmonary Case Study. Forum discussion
>>>Please you need medical background to answer questions like this<<<< Use a bibliography of a physiology book and less than 5 years of issued.

CH is a 63-year-old man who has had emphysema problems for many years. History: He smoked for 20 years before quitting.

The nurse meets CH for the first time. In performing a physical assessment, the healthcare provider would expect CH to have a “barrel” configuration to the chest. What is the underlying pathological process that contributed to the “barrel” chest configuration?

Lab values were drawn during the last physician visit; would you expect arterial gases to be normal or abnormal? Identify the pathological process involved in your response. CH and other patients with emphysema are at risk for what complications because of the pathologic process of their disease?

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