perfected for the rapid determination of the cardiothoracic ratio using graded band elastic material device.

摘要

IMPROVED DEVICE allows direct Determination of cardiothoracic ABSOLUTE MEASUREMENTS ARE NEITHER ARITHMETIC OPERATIONS. CONSISTS OF A BAND ELASTIC THICKNESS HOMOGENEOUS GRADUATE FROM 0 TO 100 IN EQUALLY (B), with one end (1) FIXED TO A STRIP (A) OF WHICH CAN BE EXTENDED BY pulling on the other end (2) FROM A MOBILE ELEMENT ALONG THE STRIP (C), which has a locking system (3) THAT MAKES MOBILE ELEMENT IN BLOCK TO ANY POINT STRIP. This arrangement lets you match ends 0 and 100 WITH EDGES THORACIC TO, KEEPING THE NECESSARY ELONGATION MERCED TO THE SYSTEM OF FIXING (3), move the device to match NOW 0 WITH ONE OF THE CARDIAC EDGES, SO THE READING SCALE EDGE ON OTHER CARDIAC (X) DA cardiothoracic INDEX DIRECTLY.