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.
Suboccipital craniotomy / craniectomy : Involves a few incision types ; midline and paramedian incisions are linear ; midline incision extends from 6 cm above the inion to the C2 spinous process ; paramedian incision ( also referred to as a retrosigmoid approach ) begins 5 mm medial to the mastoid notch and extends 4-6 cm above and below the notch ; ...