nonpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.2  Twitter.onpolar covalent bond. (physical chemistry). A bond in which a pair of electrons is distributed or shared equally between two atoms. 1  Facebook.
When is a barrel chest a sign of a disease process? Chronic obstructive pulmonary disease (COPD) is the most common instance in which a barrel chest will occur. In these cases, itâs a sign of the lungs being over-expanded. This is caused by the loss of elasticity and results in the person having hyper-inflated lungs.
Respiratory failure can occur during an acute exacerbation of COPD or in a patient who has end-stage lung disease. Other COPD Complications. Other complications of COPD include pneumonia, polycythemia, and pneumothorax. Pneumonia caused by bacterial infection can lead to respiratory failure in these patients. Streptococcus pneumoniae is the most common cause of bacterial pneumonia in patients with COPD.