Table 2 Complaint suggestive of central venous port dysfunction and flow confirmation study outcomes

Prolonged infusion time

12 (46.2%)

18 (45.0%)

0.56

 ▪ Temporary obstruction (relieved by strong flushing)

6

2

 ▪ Fibrin sheath formation

2

3

 ▪ Temporary catheter kinking

0

5

 ▪ Permanent catheter kinking

0

2

 ▪ No abnormal findings

4

6

Inability or resistance to inject saline

7 (26.9%)

10 (25.0%)

0.54

 ▪ Temporary obstruction (relieved by strong flushing)

4

2

 ▪ Fibrin sheath formation

1

1

 ▪ Permanent obstruction

1

3

 ▪ Temporary catheter kinking

0

2

 ▪ Permanent catheter kinking

0

1

 ▪ No abnormal findings

1

1

Subcutaneous extravasation of chemotherapy drug

2 (7.7%)

4 (10.0%)

0.56

 ▪ Catheter-related injury

0

2

 ▪ No abnormal findings

2

2

Inability to puncture the port

2 (7.7%)

4 (10.0%)

0.56

 ▪ Irreversible port reversal

1

1

 ▪ No abnormal findings

1

3

Swelling of the neck/arm

2 (7.7%)

2 (5%)

0.52

 ▪ Venous occlusion

1

0

 ▪ No abnormal findings

1

2

Pain of the neck/arm

1 (3.8%)

2 (5.0%)

0.66

 ▪ Venous occlusion

1

0

 ▪ Catheter-related injury

0

1

 ▪ Catheter malposition into IJV

0

1

Reason for CVP removal (N)

5 (19.2%)

12 (30.0%)

0.25

 ▪ Fibrin sheath formation

1

1

 ▪ Permanent obstruction

1

3

 ▪ Irreversible port reversal

1

1

 ▪ Venous occlusion

2

0

 ▪ Permanent catheter kinking

0

3

 ▪ Catheter-related injury

0

3

 ▪ Catheter malposition into IJV

0

1