PMC2872891_01
This pictures show the vital sign of the patient on the prone position. The left arterial blood pressure was decreased during compression of back (A). The left arterial blood pressure was recovered when compression was disappeared (B).
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F1
Despite a series of repeated compressing that triggers a drop in the left radial arterial pressure, the blood pressure in the right radial artery did not show a significant change, while the systolic pressure in the left radial artery was lower than in the right one by 40-50 mmHg (Fig. 1).
3-dimmensional computed tomography shows the compression of left subclavian artery in thoracic outlet (right arrow). The space between clavicle and first rib on the left side is narrower than right side.
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F2
TOS (Fig. 2). The blood pressure at the supine position after the operation showed just insignificant difference between the bilateral upper limbs and there was no reproduction of the symptoms that she had felt. Then on postoperative day 18, she was discharged home under follow-up medical observation.