Comparison of Clinical Performance of VectorFlow and Palindrome Symmetric-Tip Dialysis Catheters: A Multicenter, Randomized Trial.

PURPOSE: To compare clinical performance of 2 widely used symmetric-tip hemodialysis catheters. MATERIALS AND METHODS: Patients with end-stage renal disease initiating or resuming hemodialysis were randomized to receive an Arrow-Clark VectorFlow (n = 50) or Palindrome catheter (n = 50). Primary outcome was 90-d primary unassisted catheter patency. Secondary outcomes were Kt/V ([dialyzer urea clearance × total treatment time]/total volume of urea distribution), urea reduction ratio (URR), and effective blood flow (QB). RESULTS: Primary unassisted patency rates with the VectorFlow catheter at 30, 60, and 90 d were 95.5% ± 3.3, 87.2% ± 7.3, and 80.6% ± 9.8, respectively, compared with 89.1% ± 6.2, 79.4% ± 10.0, and 71.5% ± 12.6 with the Palindrome catheter (P = .20). Patients with VectorFlow catheters had a mean Kt/V of 1.5 at 30-, 60-, and 90-day time points, significantly higher than the mean Kt/V of 1.3 among those with Palindrome catheters (P = .0003). URRs were not significantly different between catheters. Catheter QB rates exceeded National Kidney Foundation-recommended thresholds of 300 mL/min at all time points for both catheters and were similar for both catheters (median, 373 mL/min). Catheter failure, ie, poor flow rate requiring guide-wire exchange or removal, within the 90-day primary outcome occurred in 3 VectorFlow subjects and 5 Palindrome subjects (P = .72). Infection rates were similar, with 0.98 infections per 1,000 catheter days for VectorFlow catheters compared with 2.62 per 1,000 catheter days for Palindrome catheters (P = .44). CONCLUSIONS: The 90-day primary patency rates of Palindrome and VectorFlow catheters were not significantly different, and both achieved sustained high QB through 90 day follow-up. However, dialysis adequacy based on Kt/V was consistently better with the VectorFlow catheter versus the Palindrome.

Esophageal strictures in children with recessive dystrophic epidermolysis bullosa: an 11-year experience with fluoroscopically guided balloon dilatation.

BACKGROUND: Recessive dystrophic epidermolysis bullosa (RDEB) is an inherited blistering skin disorder that is associated with significant esophageal strictures, resulting in dysphagia and nutritional failure. Although endoscopically guided balloon dilatation is a widely used treatment, the use of an endoscope carries the risk of oropharyngeal trauma. To minimize this risk, we have eliminated its use. METHOD: We reviewed the charts of all RDEB patients who underwent balloon dilatation for esophageal strictures between August 1993 and March 2005. Balloon dilatation procedures were performed under anesthesia and with fluoroscopic control. RESULTS: We performed 92 dilatations on 25 RDEB patients. Most patients reported immediate relief of symptoms, rapid recovery, and resumption of adequate food intake within 1 day. The mean interval between dilatations was 1 year. Six patients (24%) have required only 1 dilatation, and 1 of these 6 has had a dilatation-free interval of 25 months. One patient with a history of multiple dilatations has remained dilatation-free for 5 years. No procedure-related complications have occurred. CONCLUSIONS: Fluoroscopically guided balloon dilatation is a gentle, safe, effective, and repeatable technique that should be considered as a first line of treatment.