| 主权项 |
1. Apparatus for measuring a traction force applied to a patient during surgery, comprising:
an elongate perineal post mounted to a surgical table, the surgical table defining a planar surface on which a patient may be positioned during surgery and the perineal post having a vertical axis extending substantially perpendicular to the planar surface of the surgical table, and the perineal post mounted to the surgical table in a position so that the perineal post may be located between the patient's legs during surgery, wherein the perineal post is adapted to prevent pulling the patient along the surgical table upon application of traction force to the patient's legs; plural strain gages attached to said perineal post, each of the strain gages attached to the perineal post at a position that is above the planar surface of the surgical table, and each of said strain gages spaced apart from adjacent strain gages and each strain gage adapted for generating a signal corresponding to a force applied to said post by said patient as traction force is applied to said patient, wherein each signal generated by a strain gage is in response to a bending moment in the post; at least one load cell, said at least one load cell connected to a patient applied part that is adapted to be attaches to the patient's leg; a traction application device connected to the load cell and adapted to apply a traction force to the patient's leg; wherein the load cell is adapted to measure the traction force that is applied to the patient's leg; and a controller configured for receiving said signals from said strain gages and for calculating a vector sum from said signals, said vector sum representing the magnitude and direction of the traction force applied to said post by said patient. |
