CD14 and chronic thromboembolic pulmonary hypertension: Their study results found that the average percentage of peripheral blood non-classical monocytes (CD14+CD16++) in CTEPH patients was higher than that in CTEPD patients and the control group, and the proportion of non-classical monocytes in CTEPH patients who did not undergo PEA surgery was higher than that in CTEPH patients who underwent PEA surgery.