Lock method using sodium hydroxide solution to clear occluded central venous access devices.
Occlusion of central venous access devices (CVADs) is not an uncommon problem duringlong-term parenteral nutrition. A number of techniques have been developed to deal with obstructed CVADs. This study investigated the effectiveness of the sodium hydroxide (NaOH) lock method for gradual CVAD occlusion. When a progressively declining flow was noticed, 0.1 N NaOH solution was injected into the CVAD and locked. Nineteen CVAD occlusions in 11 home parenteral nutrition patients were treated Sixteen of 19 trials cleared the occlusions, whereas 3 of 19 failed. One of the failures was due to a mechanical occlusion and the other two were able to be restored by using ethanol. There were no significant complications. The benefits of this method are: (1) a shorter treatment time and a lower dose than NaOH infusion therapy, (2) it does not require hospital admission and (3) it does not result in bursting of the catheter.
Sando
K
K
Department of Pediatric Surgery, Osaka University Medical School, Osaka, Japan.
Fujii
M
M
Tanaka
K
K
Chen
K
K
Yoshida
H
H
Iiboshi
Y
Y
Nezu
R
R
Konishi
K
K
Takagi
Y
Y
Okada
A
A