title: Lock method using sodium hydroxide solution to clear occluded central venous access devices.
abstract: 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.
authors.affiliation: Department of Pediatric Surgery, Osaka University Medical School, Osaka, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sando
authors.forename: M
authors.initials: M
authors.lastname: Fujii
authors.forename: K
authors.initials: K
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Chen
authors.forename: H
authors.initials: H
authors.lastname: Yoshida
authors.forename: Y
authors.initials: Y
authors.lastname: Iiboshi
authors.forename: R
authors.initials: R
authors.lastname: Nezu
authors.forename: K
authors.initials: K
authors.lastname: Konishi
authors.forename: Y
authors.initials: Y
authors.lastname: Takagi
authors.forename: A
authors.initials: A
authors.lastname: Okada