| 摘要 |
A guidance device for use in performing C.T. guided needle loaded catheter drainage and needle biopsy procedures includes a needle or catheter support to which the needle or catheter is releasably fastened. A pendulum pivotally depends from a pivot point on the catheter support under the force of gravity. A protractor is secured to either the catheter support or the depending pendulum to indicate the relative angular relationship between the catheter and the pendulum, and thereby indicate the angle formed between the catheter and either a horizontal or vertical axis. Having previously determined the angle at which the catheter is to be inserted into the patient's body, the user rotates the angular position of the catheter until the protractor reading matches the desired angle.
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