10 demographic trends that are shaping the U.S. and the world. By DâVera Cohn and Andrea Caumont25 comments. At its core, demography is the act of counting people. But itâs also important to study the forces that are driving population change, and measure how these changes have an impact on peopleâs lives. For example, how does immigration affect U.S. population growth?
Type of Incisions. TYPE OF INCISIONS Upper Midline The upper midline incision provides access to the esophagus, hiatus, stomach and. duodenum, pancreas, and hepatobiliary system. If extended, it allows major hepatic resection, adrenalectomy, and splenectomy.
Midline catheters are peripheral venous access devices that vary in length between 7.5 â 20 cm. Midlines are usually placed in the upper arm vein such as the basilic, brachial, or cephalic using an ultrasound for guidance. The tip of the midline catheter ends below the level of the axillary line.