In the prior art, the applicant of the present application put into practical use a spindle balancer having a gas spring biasing the vertically movable spindle head of a machine tool upward (for example see Patent Document 1). The gas spring of the spindle balancer has a cylinder body, compressed gas introduced in the cylinder body, and a rod inserted in the cylinder body to receive the gas pressure of the compressed gas.
The spindle balancer having a gas spring is generally mounted on a machine tool vertically and, in such a case, the cylinder body is coupled to one of the spindle head and base of the machine tool and the rod is coupled to the other of the spindle head and base of the machine tool. Estimating Risk of Venous-Thromboembolic Events in Hospitalized Medical Patients: Comparison between 2008 and 2012 Guidelines.
Prophylaxis for hospitalized venous-thromboembolic events (VTEs) is frequently underutilized, in part due to lack of a simple risk assessment model (RAM). To compare patient selection and administration of VTE prophylaxis according to the American College of Chest Physicians (ACCP) 2008 guidelines versus the newer 2012 guidelines, and assess the feasibility of developing simpler local RAMs. We conducted a prospective assessment of VTE risk among 300 unselected consecutive patients admitted to a medical hospital ward, using the 2008 and 2012 ACCP guidelines. The frequency and relative weight of each risk factor in the 2012 ACCP guidelines were used to develop a local VTE RAM. VTE prophylaxis was indicated by the 2008 and 2012 ACCP guidelines