PubMed Health⌕ Search

Biomedical subjects

James S Donaldson

Publications and source records attributed to James S Donaldson.

4 recordsLinked to original sources

Pediatric vascular access.

Pediatric interventional radiologists are ideally suited to provide vascular access services to children because of inherent safety advantages and higher success from using image-guided techniques. The performance of vascular access procedures has become routine at many adult interventional radiology practices, but this service is not as widely developed at pediatric institutions. Although interventional radiologists at some children's hospitals offer full-service vascular access, there is little or none at others. Developing and maintaining a pediatric vascular access service is a challenge. Interventionalists skilled in performing such procedures are limited at pediatric institutions, and institutional support from clerical staff, nursing staff, and technologists might not be sufficiently available to fulfill the needs of such a service. There must also be a strong commitment by all members of the team to support such a demanding service. There is a slippery slope of expected services that becomes steeper and steeper as the vascular access service grows. This review is intended primarily as general education for pediatric radiologists learning vascular access techniques. Additionally, the pediatric or adult interventional radiologist seeking to expand services might find helpful tips. The article also provides education for the diagnostic radiologist who routinely interprets radiographs containing vascular access devices.

Catheterization↗

Outcomes and risk factors for failure of radiologic treatment of biliary strictures in pediatric liver transplantation recipients.

Posttransplantation biliary strictures occur in 5-34% of the pediatric liver transplant patients and are conventionally managed by interventional radiological techniques. The aim of this manuscript is to assess the outcomes of patients with biliary strictures treated by percutaneous dilatation at our institution. Included in the study were 35 children with posttransplant biliary strictures that were treated with percutaneous dilatation and stenting. Initial dilation and biliary stent placement was accomplished in all patients without complications requiring surgical intervention. Recurrent strictures developed in 23 (66%) of 35 patients. The recurrence rate was 45% for anastomotic strictures, 90% for intrahepatic strictures, and 100% for those with both an anastomotic and intrahepatic component. Seven patients required revision of the choledochojejunostomy, 5 of them with a successful outcome and 2 requiring retransplant. Five patients were treated with retransplantation without surgical revision. Patients with an intrahepatic or a "combined" stricture were less likely to have a successful outcome after radiologic treatment. In conclusion, the radiological treatment of biliary strictures with balloon dilation and stenting can be performed successfully with minimal complications avoiding the need for surgical correction in many cases.

Adolescent↗

Conventional versus modified technique for percutaneous nephrostomy in newborns and young infants.

Percutaneous nephrostomy (PN) in newborns and young infants presents unique challenges. Twenty-six consecutive PN procedures in 18 patients were retrospectively reviewed. Fifteen procedures were performed with the conventional micropuncture technique. The modified technique describe herein was used in 11 procedures. Depending on whether there is obstruction and whether the obstruction is at the ureteropelvic junction level or distal to it, the technique selected will vary.

Humans↗