| 摘要 |
PROBLEM TO BE SOLVED: To provide a circular slide rule for drip infusion with which one can tell the number of drips at a glance for a specified measuring time (normally 30 s, 15 s or 10 s at a medical site) in the cases of conducting transfusions by using transfusion sets for an adult and an infant. SOLUTION: A disc 2 is superposed on a base plate 1, and a central position of the disc 2 is rotatably fastened to the plate 1. A first window hole 4 and a second window hole 5 are each perforated at two positions of the disc 2 in an arc-like state in a circumferential direction, a scale A of a transfusion amount is marked along an edge of the first hole 4, a scale B of a number-of- drips measuring time for the adult and a scale C of a number-of-drips measuring time for the infant are classically marked along an edge of the second hole 5. A scale D of a dripping time is marked at a position corresponding to the first hole 4 of the disc 2 on the plate 1, and a scale E of a number of drips is marked at a position corresponding to the second hole 5. The scale B of the number-of-drips measuring time for the adult and the scale C of the number- of-drips measuring time for the infant are respectively displayed by black triangular arrows and void triangular arrows marked at 30 s, 15 s and 10 s of the measuring times normally used in the medical site. |
