PMC8203319_01
Prerevision chest X-ray demonstrating crossing of chemotherapy port catheter (black arrow) and distal shunt catheter (white arrow).
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PMC8203319_01_10-1055-s-0041-1726274-i200010-1.jpg
FI200010-1
Preoperative X-ray demonstrating the relationship between the chemotherapy port and the distal shunt catheter is shown in Fig. 1 .
Cartoon illustration of shunt exploration findings. (
A
) When the head was flexed and turned to the right, the pressure dropped to 3 cm H
2
O. (
B
) When the head was flat and in neutral position, the pressure was 11 cm H
2
O. (
C
) When the patient's head was turned to the left and the manometer was reprimed, the pressure was noted to only drop to 15 cm H
2
O.
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PMC8203319_01_10-1055-s-0041-1726274-i200010-2.jpg
FI200010-2
An illustration of the dynamic flow obstruction with head movement is shown in Fig. 2 . 
Postrevision X-rays of head and neck (left) and chest (right) demonstrating relationship of chemotherapy port catheter (black arrows) and distal shunt catheter (white arrows).
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PMC8203319_01_10-1055-s-0041-1726274-i200010-3.jpg
FI200010-3
Postoperative X-ray demonstrating the relationship between port and distal catheter is shown in Fig. 3 .