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我们用自制铅线尺对肺部病灶及肢体异物透视下测量定位,使用颇感方便,现介绍如下: 铅线尺制作及使用方法:把5安培保险丝夹扁使其宽径成0.7毫米,截成0.5、1.0、1.5厘米长条,用胶布固定于有机玻璃条尺的刻度上。把铅线尺横置于荧光屏背面固定,即可对胸内病灶测量。对肢体异位物深度定位时,需在透视床面上再横行固定一铅尺,尺“0”置床中线上。被照肢体紧贴透视床,移动荧光屏使X线中心从二尺“0”穿过,用斜线投照异物,记录屏上异物距a1,然后横行移动荧光屏4厘米(以透视床上刻度为准)。测异物距a2,代入公式d=L_2-L(1-C/a_2-a_1)即可算出异物距床面侧皮肤的深度(见:附图)。使用范围: ①肢体异物深度定位;②气胸肺萎陷量估计:在透视下测量无肺纹区宽径,小于2cm时,肺压
We use homemade lead ruler on the lung lesions and limb foreign body perspective measurement and positioning, the use of quite convenient, are described below: Lead wire ruler production and use: 5 amp fuse clip flattened to 0.7 mm wide, cut Into 0.5,1.0,1.5 cm strips, with tape fixed to the plexiglass ruler scale. The lead wire ruler transversely placed on the back of the screen fixed, you can measure the thoracic lesions. Depth of positioning on the body of alien objects, need to be fixed in the horizontal surface of the bed a horizontal ruler, ruler “0” set bed centerline. According to the body close to the perspective of the bed, moving the screen so that the X-ray center from two feet “0” through the projection of foreign objects with a slash, record foreign objects from the screen a1, and then move the screen horizontally 4 cm ). Measure the distance a2, into the formula d = L_2-L (1-C / a_2-a_1) can calculate the depth of foreign body from the bedside skin (see: Figure). Range of use: (1) Depth of limb foreign body positioning; (2) Estimation of pneumothorax and lung collapse: When the width of non-pulmonary area is measured under fluoroscopy, pulmonary pressure